RTCPeerConnection.addTrack() - Web APIs
the rtcpeerconnection method addtrack() adds a new media track to the set of tracks which will be transmitted to the other peer. note: adding a track to a connection triggers renegotiation by firing a negotiationneeded event. see starting negotiation in signaling and video calling for details. syntax rtpsender = rtcpeerconnection.addtrack(track, stream...); parameters track a mediastreamtrack object representing the media track to add to the peer connection. stream... optional one or more local mediastream objects to which the track should be added. the specified track doesn't necessarily have to already be part of any of the specified streams. instead, the streams are simply a way to group tracks together on the receiving end of the connection, making sure they are synchronized. a...
...stream... optional one or more local mediastream objects to which the track should be added. the specified track doesn't necessarily have to already be part of any of the specified streams. instead, the streams are simply a way to group tracks together on the receiving end of the connection, making sure they are synchronized. any tracks that are added to the same stream on the local end of the connection will be on the same stream on the remote end. return value the rtcrtpsender object which will be used to transmit the media data. note: every rtcrtpsender is paired with an rtcrtpreceiver to make up an rtcrtptransceiver. the associated receiver is muted (indicating that it is not able to deliver packets) until and unless one or more streams are added to the receiver by the remote peer. e...
...t the media data. note: every rtcrtpsender is paired with an rtcrtpreceiver to make up an rtcrtptransceiver. the associated receiver is muted (indicating that it is not able to deliver packets) until and unless one or more streams are added to the receiver by the remote peer. exceptions invalidaccesserror the specified track (or all of its underlying streams) is already part of the rtcpeerconnection. invalidstateerror the rtcpeerconnection is closed. usage notes adding tracks to multiple streams after the track parameter, you can optionally specify one or more mediastream objects to add the track to. only tracks are sent from one peer to another, not streams. since streams are specific to each peer, specifying one or more streams means the other peer will create a corresponding stre...
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AudioNode.connect() - Web APIs
the connect() method of the audionode interface lets you connect one of the node's outputs to a target, which may be either another audionode (thereby directing the sound data to the specified node) or an audioparam, so that the node's output data is automatically used to change the value of that parameter over time. syntax var destinationnode = audionode.connect(destination, outputindex, inputindex); audionode.connect(destination, outputindex); parameters destination the audionode or audioparam to which to connect. outputindex optional an index specifying which output of the current audionode to connect to the destination. the index numbers are defined according to the number of output channels (see audio channels). ...
...de.connect(destination, outputindex, inputindex); audionode.connect(destination, outputindex); parameters destination the audionode or audioparam to which to connect. outputindex optional an index specifying which output of the current audionode to connect to the destination. the index numbers are defined according to the number of output channels (see audio channels). while you can only connect a given output to a given input once (repeated attempts are ignored), you can connect an output to multiple inputs by calling connect() repeatedly. this makes fan-out possible. the default value is 0. inputindex optional an index describing which input of the destination you want to connect the current audionode to; the default is 0. the index numbers are defined according to the number of inpu...
...empts are ignored), you can connect an output to multiple inputs by calling connect() repeatedly. this makes fan-out possible. the default value is 0. inputindex optional an index describing which input of the destination you want to connect the current audionode to; the default is 0. the index numbers are defined according to the number of input channels (see audio channels). it is possible to connect an audionode to another audionode, which in turn connects back to the first audionode, creating a cycle. this is allowed only if there is at least one delaynode in the cycle. otherwise, a notsupportederror exception is thrown. this parameter is not allowed if the destination is an audioparam. ...
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PerformanceResourceTiming.secureConnectionStart - Web APIs
example in the following example, the value of the *start and *end properties of all "resource" type events are logged. ...
... example in the following example, the value of the *start and *end properties of all "resource" type events are logged. ...
... example in the following example, the value of the *start and *end properties of all "resource" type events are logged. ...
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RTCPeerConnection.setLocalDescription() - Web APIs
the rtcpeerconnection method setlocaldescription() changes the local description associated with the connection. this description specifies the properties of the local end of the connection, including the media format. the method takes a single parameter—the session description—and it returns a promise which is fulfilled once the description has been changed, asynchronously. if setlocaldescription() is called while a connection is already in place, it means renegotiation is underway (possibly to adapt to changing network conditions). because descriptions will be exchanged until the two peers agree on a configuration, the description submitted by calling setlocaldescription() does not immediately take effect. ...
...ion has been changed, asynchronously. if setlocaldescription() is called while a connection is already in place, it means renegotiation is underway (possibly to adapt to changing network conditions). because descriptions will be exchanged until the two peers agree on a configuration, the description submitted by calling setlocaldescription() does not immediately take effect. instead, the current connection configuration remains in place until negotiation is complete. only then does the agreed-upon configuration take effect. ...
... to adapt to changing network conditions). because descriptions will be exchanged until the two peers agree on a configuration, the description submitted by calling setlocaldescription() does not immediately take effect. instead, the current connection configuration remains in place until negotiation is complete. only then does the agreed-upon configuration take effect. syntax apromise = rtcpeerconnection.setlocaldescription(sessiondescription); pc.setlocaldescription(sessiondescription, successcallback, errorcallback); parameters sessiondescription optional an rtcsessiondescriptioninit or rtcsessiondescription which specifies the configuration to be applied to the local end of the connection. if the description is omitted, the webrtc runtime tries to automatically do the right thing. ...
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RTCPeerConnection.signalingState - Web APIs
see signaling in lifetime of a webrtc session for more details about the signaling process. because the signaling process is a state machine, being able to verify that your code is in the expected state when messages arrive can help avoid unexpected and avoidable failures. ...
... is a state machine, being able to verify that your code is in the expected state when messages arrive can help avoid unexpected and avoidable failures. ...
...nswers after creating an offer but before an answer has been received and passed into rtcpeerconnection.setlocaldescription(). your code will be more reliable if you watch for mismatched states like this and handle them gracefully. this value may also be useful during debugging, for example. in addition, when the value of this property changes, a signalingstatechange event is sent to the rtcpeerconnection instance. syntax var state = rtcpeerconnection.signalingstate; value the allowed values are those included in the enum rtcsignalingstate. rtcsignalingstate enum the rtcsignalingstate enum specifies the possible values of rtcpeerconnection.signalingstate, which indicates where in the process of signaling the exchange of offer and answer the connection currently is. constant ...
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Creating Sandboxed HTTP Connections
nsiuri is an xpcom representation of an uri, with useful methods to query and manipulate the uri. ...
...nsiuri is an xpcom representation of an uri, with useful methods to query and manipulate the uri. ...
...nsiuri is an xpcom representation of an uri, with useful methods to query and manipulate the uri. ...
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RTCPeerConnection.createOffer() - Web APIs
the createoffer() method of the rtcpeerconnection interface initiates the creation of an sdp offer for the purpose of starting a new webrtc connection to a remote peer. the sdp offer includes information about any mediastreamtracks already attached to the webrtc session, codec, and options supported by the browser, and any candidates already gathered by the ice agent, for the purpose of being sent over the signaling channel to a potential peer to request a connection or to update the configuration of an existing connection. the return value is a promise which, when the offer has been created, is resolved with a rtcsessiondescription object containing the newly-created offer. ...
...wser, and any candidates already gathered by the ice agent, for the purpose of being sent over the signaling channel to a potential peer to request a connection or to update the configuration of an existing connection. the return value is a promise which, when the offer has been created, is resolved with a rtcsessiondescription object containing the newly-created offer. syntax apromise = mypeerconnection.createoffer([options]); mypeerconnection.createoffer(successcallback, failurecallback, [options]) parameters options optional an rtcofferoptions dictionary providing options requested for the offer. ...
...this will cause the returned offer to have different credentials than those already in place. if you then apply the returned offer, ice will restart. specify false to keep the same credentials and therefore not restart ice. the default is false. ...
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Effective connection type - MDN Web Docs Glossary: Definitions of Web-related terms
2g 1400ms 70 kbps the network is suited for transfers of small images. ...
... 2g 1400ms 70 kbps the network is suited for transfers of small images. ...
... 2g 1400ms 70 kbps the network is suited for transfers of small images. ...
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PerformanceResourceTiming.connectEnd - Web APIs
example in the following example, the value of the *start and *end properties of all "resource" type events are logged. ...
... example in the following example, the value of the *start and *end properties of all "resource" type events are logged. ...
... example in the following example, the value of the *start and *end properties of all "resource" type events are logged. ...
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RTCPeerConnection: icecandidate event - Web APIs
sharing a new candidate the majority of icecandidate events are fired to indicate that a new candidate has been gathered. ...
... sharing a new candidate the majority of icecandidate events are fired to indicate that a new candidate has been gathered. ...
... sharing a new candidate the majority of icecandidate events are fired to indicate that a new candidate has been gathered. ...
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RTCPeerConnection: negotiationneeded event - Web APIs
this starts the process of ice negotiation by instructing your code to begin exchanging ice candidates through the signaling server. ...
...this starts the process of ice negotiation by instructing your code to begin exchanging ice candidates through the signaling server. ...
...this starts the process of ice negotiation by instructing your code to begin exchanging ice candidates through the signaling server. ...
...And 5 more matches

RTCPeerConnection.pendingLocalDescription - Web APIs
otherwise, this returns null. ...
...otherwise, this returns null. ...
...otherwise, this returns null. ...
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RTCPeerConnection.pendingRemoteDescription - Web APIs
otherwise, this returns null. ...
...otherwise, this returns null. ...
...otherwise, this returns null. ...
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PerformanceResourceTiming.connectStart - Web APIs
example in the following example, the value of the *start and *end properties of all "resource" type events are logged. ...
... example in the following example, the value of the *start and *end properties of all "resource" type events are logged. ...
... example in the following example, the value of the *start and *end properties of all "resource" type events are logged. ...
...And 4 more matches

RTCPeerConnection() - Web APIs
the rtcpeerconnection() constructor returns a newly-created rtcpeerconnection, which represents a connection between the local device and a remote peer. syntax pc = new rtcpeerconnection([configuration]); parameters configuration optional an rtcconfiguration dictionary providing options to configure the new connection. rtcconfiguration dictionary bundlepolicy optional specifies how to handle negotiation of candidates when the remote peer is not compatible with the sdp bundle standard. this must be one of the values from the enum rtcbundlepolicy. if this value isn't included in the dictionary, "balanced" is assumed. certificates optional an array of objects of type rtccertificate which are used by the connection for authentication. if this property isn't specified, a set of certifi...
...is not compatible with the sdp bundle standard. this must be one of the values from the enum rtcbundlepolicy. if this value isn't included in the dictionary, "balanced" is assumed. certificates optional an array of objects of type rtccertificate which are used by the connection for authentication. if this property isn't specified, a set of certificates is generated automatically for each rtcpeerconnection instance. although only one certificate is used by a given connection, providing certificates for multiple algorithms may improve the odds of successfully connecting in some circumstances. see using certificates below for additional information. this configuration option cannot be changed after it is first specified; once the certificates have been set, this property is ignored in future call...
.... although only one certificate is used by a given connection, providing certificates for multiple algorithms may improve the odds of successfully connecting in some circumstances. see using certificates below for additional information. this configuration option cannot be changed after it is first specified; once the certificates have been set, this property is ignored in future calls to rtcpeerconnection.setconfiguration(). icecandidatepoolsize optional an unsigned 16-bit integer value which specifies the size of the prefetched ice candidate pool. the default value is 0 (meaning no candidate prefetching will occur). ...
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RTCPeerConnection.addStream() - Web APIs
the obsolete rtcpeerconnection method addstream() adds a mediastream as a local source of audio or video. instead of using this obsolete method, you should instead use addtrack() once for each track you wish to send to the remote peer. if the signalingstate is set to closed, an invalidstateerror is raised. if the signalingstate is set to stable, the event negotiationneeded is sent on the rtcpeerconnection to indicate that ice negotiation must be repeated to consider the new stream. syntax rtcpeerconnection.addstream(mediastream); parameters mediastream a mediastream object indicating the stream to add to the webrtc peer connection. return value none. example this simple example adds the audio and video stream coming from the user's camera to the connection. navigator.mediadevices...
...m. syntax rtcpeerconnection.addstream(mediastream); parameters mediastream a mediastream object indicating the stream to add to the webrtc peer connection. return value none. example this simple example adds the audio and video stream coming from the user's camera to the connection. ...
...ming from the user's camera to the connection. navigator.mediadevices.getusermedia({video:true, audio:true}, function(stream) { var pc = new rtcpeerconnection(); pc.addstream(stream); }); migrating to addtrack() compatibility allowing, you should update your code to instead use the addtrack() method: navigator.getusermedia({video:true, audio:true}, function(stream) { var pc = new rtcpeerconnection(); stream.gettracks().foreach(function(track) { pc.addtrack(track, stream); }); }); the newer addtrack() api avoids confusion over whether later changes to the track-makeup of a stream affects a peer connection (they do not). ...
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RTCPeerConnection.createDataChannel() - Web APIs
this string may not be longer than 65,535 bytes. ...
...this string may not be longer than 65,535 bytes. ...
...ection interface creates a new channel linked with the remote peer, over which any kind of data may be transmitted. this can be useful for back-channel content such as images, file transfer, text chat, game update packets, and so forth. if the new data channel is the first one added to the connection, renegotiation is started by delivering a negotiationneeded event. syntax datachannel = rtcpeerconnection.createdatachannel(label[, options]); parameters label a human-readable name for the channel. this string may not be longer than 65,535 bytes. options optional an rtcdatachannelinit dictionary providing configuration options for the data channel rtcdatachannelinit dictionary the rtcdatachannelinit dictionary provides the following fields, any of which may be included in the object pas...
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RTCPeerConnection: icecandidateerror event - Web APIs
there is one additional, webrtc-specific, error which lies outside the valid stun error code range: 701. ...
...there is one additional, webrtc-specific, error which lies outside the valid stun error code range: 701. ...
...there is one additional, webrtc-specific, error which lies outside the valid stun error code range: 701. ...
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AudioNode.disconnect() - Web APIs
the disconnect() method of the audionode interface lets you disconnect one or more nodes from the node on which the method is called. syntax audionode.disconnect(); audionode.disconnect(output); audionode.disconnect(destination); audionode.disconnect(destination, output); audionode.disconnect(destination, output, input); return value undefined parameters there are several versions of the disconnect() method, which accept different combinations of parameters to control which nodes to disconnect from. if no parameters are provided, all outgoing connections are disconnected. destination optional an audionode or audioparam specifying the node or nodes to disconnect from. ...
...e undefined parameters there are several versions of the disconnect() method, which accept different combinations of parameters to control which nodes to disconnect from. if no parameters are provided, all outgoing connections are disconnected. destination optional an audionode or audioparam specifying the node or nodes to disconnect from. if this value is an audionode, a single node is disconnected from, with any other, optional, parameters (output and/or input) further limiting which inputs and/or outputs should be disconnected. if this value is an audioparam, then the connection to that audioparam is terminated, and the node's contributions to that computed parameter become 0 going forward once the change takes effect. ...
...the index numbers are defined according to the number of output channels (see audio channels). if this parameter is out-of-bound, an indexsizeerror exception is thrown. ...
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Node.isConnected - Web APIs
the isconnected read-only property of the node interface returns a boolean indicating whether the node is connected (directly or indirectly) to the context object, for example the document object in the case of the normal dom, or the shadowroot in the case of a shadow dom. syntax var isitconnected = nodeobjectinstance.isconnected return value a boolean that is true if the node is connected to its relevant context object, and false if not. ...
...object, for example the document object in the case of the normal dom, or the shadowroot in the case of a shadow dom. syntax var isitconnected = nodeobjectinstance.isconnected return value a boolean that is true if the node is connected to its relevant context object, and false if not. ...
...dowroot in the case of a shadow dom. syntax var isitconnected = nodeobjectinstance.isconnected return value a boolean that is true if the node is connected to its relevant context object, and false if not. ...
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RTCPeerConnection.getConfiguration() - Web APIs
the rtcpeerconnection.getconfiguration() method returns an rtcconfiguration object which indicates the current configuration of the rtcpeerconnection on which the method is called. the returned configuration is the last configuration applied via setconfiguration(), or if setconfiguration() hasn't been called, the configuration the rtcpeerconnection was constructed with. the configuration includes a list of the ice servers used by the connection, information about transport policies, and identity information. syntax var configuration = rtcpeerconnection.getconfiguration(); parameters this method takes no input parameters. return value an rtcconfiguration object describing the rtcpeerconnection's current configuration. ...
...ncludes a list of the ice servers used by the connection, information about transport policies, and identity information. syntax var configuration = rtcpeerconnection.getconfiguration(); parameters this method takes no input parameters. return value an rtcconfiguration object describing the rtcpeerconnection's current configuration. example this example adds a new certificate to an active connection if it doesn't already have one in use. ...
...ransport policies, and identity information. syntax var configuration = rtcpeerconnection.getconfiguration(); parameters this method takes no input parameters. return value an rtcconfiguration object describing the rtcpeerconnection's current configuration. example this example adds a new certificate to an active connection if it doesn't already have one in use. ...
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RTCPeerConnection.restartIce() - Web APIs
the webrtc api's rtcpeerconnection interface offers the restartice() method to allow a web application to easily request that ice candidate gathering be redone on both ends of the connection. this simplifies the process by allowing the same method to be used by either the caller or the receiver to trigger an ice restart. after restartice() returns, the offer returned by the next call to createoffer() is automatically configured to trigger ice restart on both the local peer (once the local peer has been set) and on the remote peer, once the offer is sent across your signaling mechanism and the remote peer has set its description as well. ...
.... after restartice() returns, the offer returned by the next call to createoffer() is automatically configured to trigger ice restart on both the local peer (once the local peer has been set) and on the remote peer, once the offer is sent across your signaling mechanism and the remote peer has set its description as well. ...
... across your signaling mechanism and the remote peer has set its description as well. restartice() causes the negotiationneeded event to be fired on the rtcpeerconnection to inform the application that it should perform negotiation using its signaling channel. if negotiation fails to complete—either due to rollback or because incoming offers are in the process of being negotiated—the rtcpeerconnection will remember that you requested ice restart. the next time the connection's signalingstate changes to stable, the connection will fire the negotiationneeded event. this process continues until an ice restart has been successfully completed. syntax rtcpeerconnection.restartice(); parameters none. return value undefined. usage notes after calling restartice(), the next offer created usi...
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RTCPeerConnection.setConfiguration() - Web APIs
the rtcpeerconnection.setconfiguration() method sets the current configuration of the rtcpeerconnection based on the values included in the specified rtcconfiguration object. this lets you change the ice servers used by the connection and which transport policies to use. the most common use case for this method (and even then, probably not a very common use case) is to replace the set of ice servers to be used. two potential scenarios in which this might be done: the rtcpeerconnection was instantiated without specifying any ice servers. if, for example, the rtcpeerconnection() constructor was called with no parameters, you would have to then call setconfiguration() to add ice servers before ice negotiation could begin. ...
...n use case) is to replace the set of ice servers to be used. two potential scenarios in which this might be done: the rtcpeerconnection was instantiated without specifying any ice servers. if, for example, the rtcpeerconnection() constructor was called with no parameters, you would have to then call setconfiguration() to add ice servers before ice negotiation could begin. renegotiation of the connection is needed, and a different set of ice servers needs to be used for some reason. perhaps the user has moved into a new region, so using new regional ice servers is necessary, for example. ...
...the changes are not additive; instead, the new values completely replace the existing ones. ...
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RTCPeerConnection.addIceCandidate() - Web APIs
if the candidate parameter is missing or a value of null is given when calling addicecandidate(), the added ice candidate is an "end-of-candidates" indicator. the same is the case if the value of the specified object's candidate is either missing or an empty string (""), it signals that all remote candidates have been delivered. ...
... if the candidate parameter is missing or a value of null is given when calling addicecandidate(), the added ice candidate is an "end-of-candidates" indicator. the same is the case if the value of the specified object's candidate is either missing or an empty string (""), it signals that all remote candidates have been delivered. ...
...idate is either missing or an empty string (""), it signals that all remote candidates have been delivered. the end-of-candidates notification is transmitted to the remote peer using a candidate with an a-line value of end-of-candidates. during negotiation, your app will likely receive many candidates which you'll deliver to the ice agent in this way, allowing it to build up a list of potential connection methods. this is covered in more detail in the articles webrtc connectivity and signaling and video calling. syntax apromise = pc.addicecandidate(candidate); addicecandidate(candidate, successcallback, failurecallback); parameters candidate optional an object conforming to the rtcicecandidateinit dictionary, or an rtcicecandidate object; the contents of the object should be constr...
...And 2 more matches

RTCPeerConnection.canTrickleIceCandidates - Web APIs
ideally, your signaling protocol provides a way to detect trickling support, so that you don't need to rely on this property. a webrtc browser will always support trickle ice. ...
... ideally, your signaling protocol provides a way to detect trickling support, so that you don't need to rely on this property. a webrtc browser will always support trickle ice. ...
...n't need to rely on this property. a webrtc browser will always support trickle ice. if trickling isn't supported, or you aren't able to tell, you can check for a falsy value for this property and then wait until the value of icegatheringstate changes to "completed" before creating and sending the initial offer. that way, the offer contains all of the candidates. ...
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RTCPeerConnection.close() - Web APIs
the rtcpeerconnection.close() method closes the current peer connection. syntax peerconnection.close(); this method has no parameters, and returns nothing. calling this method terminates the rtcpeerconnection's ice agent, ending any ongoing ice processing and any active streams. this also releases any resources in use by the ice agent, including turn permissions. all rtcrtpsender objects are considered to be stopped once this returns (they may still be in the process of stopping, but for all intents and purposes, they're stopped). once this method returns, the signaling state as returned by rtcpeerconnection.signalingstate is closed. ...
...rces in use by the ice agent, including turn permissions. all rtcrtpsender objects are considered to be stopped once this returns (they may still be in the process of stopping, but for all intents and purposes, they're stopped). once this method returns, the signaling state as returned by rtcpeerconnection.signalingstate is closed. ...
...ns. all rtcrtpsender objects are considered to be stopped once this returns (they may still be in the process of stopping, but for all intents and purposes, they're stopped). once this method returns, the signaling state as returned by rtcpeerconnection.signalingstate is closed. make sure that you delete all references to the previous rtcpeerconnection before attempting to create a new one that connects to the same remote peer, as not doing so might result in some errors depending on the browser. ...
...And 2 more matches

RTCPeerConnection.currentLocalDescription - Web APIs
the read-only property rtcpeerconnection.currentlocaldescription returns an rtcsessiondescription object describing the local end of the connection as it was most recently successfully negotiated since the last time the rtcpeerconnection finished negotiating and connecting to a remote peer. also included is a list of any ice candidates that may already have been generated by the ice agent since the offer or answer represented by the description was first instantiated. to change the currentlocaldescription, call rtcpeerconnection.setlocaldescription(), which triggers a series of events which leads to this value being set. ...
...generated by the ice agent since the offer or answer represented by the description was first instantiated. to change the currentlocaldescription, call rtcpeerconnection.setlocaldescription(), which triggers a series of events which leads to this value being set. for details on what exactly happens and why the change isn't necessarily instantaneous, see pending and current descriptions in webrtc connectivity. ...
...ce the offer or answer represented by the description was first instantiated. to change the currentlocaldescription, call rtcpeerconnection.setlocaldescription(), which triggers a series of events which leads to this value being set. for details on what exactly happens and why the change isn't necessarily instantaneous, see pending and current descriptions in webrtc connectivity. unlike rtcpeerconnection.localdescription, this value represents the actual current state of the local end of the connection; localdescription may specify a description which the connection is currently in the process of switching over to. syntax sessiondescription = rtcpeerconnection.currentlocaldescription; return value the current description of the local end of the connection, if one has been set. if none has...
...And 2 more matches

RTCPeerConnection.currentRemoteDescription - Web APIs
the read-only property rtcpeerconnection.currentremotedescription returns an rtcsessiondescription object describing the remote end of the connection as it was most recently successfully negotiated since the last time the rtcpeerconnection finished negotiating and connecting to a remote peer. also included is a list of any ice candidates that may already have been generated by the ice agent since the offer or answer represented by the description was first instantiated. to change the currentremotedescription, call rtcpeerconnection.setremotedescription(), which triggers a series of events which leads to this value being set. ...
...nerated by the ice agent since the offer or answer represented by the description was first instantiated. to change the currentremotedescription, call rtcpeerconnection.setremotedescription(), which triggers a series of events which leads to this value being set. for details on what exactly happens and why the change isn't necessarily instantaneous, see pending and current descriptions in webrtc connectivity. ...
... the offer or answer represented by the description was first instantiated. to change the currentremotedescription, call rtcpeerconnection.setremotedescription(), which triggers a series of events which leads to this value being set. for details on what exactly happens and why the change isn't necessarily instantaneous, see pending and current descriptions in webrtc connectivity. unlike rtcpeerconnection.remotedescription, this value represents the actual current state of the local end of the connection; remotedescription may specify a description which the connection is currently in the process of switching over to. syntax sessiondescription = rtcpeerconnection.currentremotedescription; return value the current description of the remote end of the connection, if one has been set. if none...
...And 2 more matches

RTCPeerConnection.getStats() - Web APIs
the rtcpeerconnection method getstats() returns a promise which resolves with data providing statistics about either the overall connection or about the specified mediastreamtrack. syntax promise = rtcpeerconnection.getstats(selector) parameters selector optional a mediastreamtrack for which to gather statistics. if this is null (the default value), statistics will be gathered for the entire rtcpeerconnection. return value a promise which resolves with an rtcstatsreport object providing connection statistics. the contents of the report depend on the selector as well as other details of the connection. exceptions this method does not throw exceptions; instead, it rejects the returned promise with one of the following errors: invalidaccesserror there is no rtcrtpsender or rtcrt...
...e; in addition, the data it returns is entirely different from the current specification, and the form of that data was never documented. this form of getstats() has been or will soon be removed from most browsers; you should not use it, and should update existing code to use the new promise-based version. check the browser compatibility table to verify the state of this method. promise = rtcpeerconnection.getstats(selector, successcallback, failurecallback) parameters selector optional a mediastreamtrack for which to gather statistics. if this is null (the default value), statistics will be gathered for the entire rtcpeerconnection. successcallback a callback function to call when the stats have been retrieved. the function receives as input a single parameter: an rtcstatsreport with t...
... output is expected from the function. failurecallback a function to call when an error occurs while attempting to collect statistics. the callback receives as input the exception (a domexception object describing the error which occurred. no return value is expected from the callback. ...
...And 2 more matches

RTCPeerConnection.removeStream() - Web APIs
return value undefined. ...
... the negotiation already happened, a new one will be needed for the remote peer to be able to use it. because this method has been deprecated, you should instead use removetrack() if your target browser versions have implemented it. if the signalingstate is set to "closed", an invalidstateerror is raised. ...
...pened, a new one will be needed for the remote peer to be able to use it. because this method has been deprecated, you should instead use removetrack() if your target browser versions have implemented it. if the signalingstate is set to "closed", an invalidstateerror is raised. if the signalingstate is set to "stable", the event negotiationneeded is sent on the rtcpeerconnection. ...
...And 2 more matches

CSP: connect-src - HTTP
the http content-security-policy (csp) connect-src directive restricts the urls which can be loaded using script interfaces. the apis that are restricted are: <a> ping, fetch, xmlhttprequest, websocket, eventsource, and navigator.sendbeacon(). note: connect-src 'self' does not resolve to websocket schemas in all browsers, more info: https://github.com/w3c/webappsec-csp/issues/7 csp version 1 directive type fetch directive default-src fallback yes. if this directive is absent, the user agent will look for the default-src directive. ...
...acon(). note: connect-src 'self' does not resolve to websocket schemas in all browsers, more info: https://github.com/w3c/webappsec-csp/issues/7 csp version 1 directive type fetch directive default-src fallback yes. if this directive is absent, the user agent will look for the default-src directive. syntax one or more sources can be allowed for the connect-src policy: content-security-policy: connect-src <source>; content-security-policy: connect-src <source> <source>; sources <source> can be one of the following: <host-source> internet hosts by name or ip address, as well as an optional url scheme and/or port number. the site's address may include an optional leading wildcard (the asterisk character, '*'), and you may use a wildcard (again...
...e. when generating the hash, don't include the <script> or <style> tags and note that capitalization and whitespace matter, including leading or trailing whitespace. see unsafe inline script for an example. in csp 2.0, this applied only to inline scripts. csp 3.0 allows it in the case of script-src for external scripts. examples violation cases given this csp header: content-security-policy: connect-src https://example.com/ the following connections are blocked and won't load: <a ping="https://not-example.com"> <script> var xhr = new xmlhttprequest(); xhr.open('get', 'https://not-example.com/'); xhr.send(); var ws = new websocket("https://not-example.com/"); var es = new eventsource("https://not-example.com/"); navigator.sendbeacon("https://not-example.com/", { ... }); </sc...
...And 2 more matches

PR_Connect
initiates a connection on a specified socket. syntax #include <prio.h> prstatus pr_connect( prfiledesc *fd, const prnetaddr *addr, printervaltime timeout); parameters the function has the following parameters: fd a pointer to a prfiledesc object representing a socket. addr a pointer to the address of the peer to which the socket is to be connected. timeout a value of type printervaltime specifying the time limit for completion of the connect operation. returns the function returns one of the following values: upon successful completion of connection setup, pr_success. if unsuccessful, pr_failure. further information can be obtained by calling pr_geterror. description pr_connect is usually invoked on a tcp socket, but it may also be invoked on a udp socket. both case...
...ct operation. returns the function returns one of the following values: upon successful completion of connection setup, pr_success. if unsuccessful, pr_failure. further information can be obtained by calling pr_geterror. description pr_connect is usually invoked on a tcp socket, but it may also be invoked on a udp socket. both cases are discussed here. if the socket is a tcp socket, pr_connect establishes a tcp connection to the peer. if the socket is not bound, it will be bound to an arbitrary local address. pr_connect blocks until either the connection is successfully established or an error occurs. ...
...t, but it may also be invoked on a udp socket. both cases are discussed here. if the socket is a tcp socket, pr_connect establishes a tcp connection to the peer. if the socket is not bound, it will be bound to an arbitrary local address. pr_connect blocks until either the connection is successfully established or an error occurs. the function uses the lesser of the provided timeout and the os's connect timeout. in particular, if you specify pr_interval_no_timeout as the timeout, the os's connection time limit will be used. if the socket is a udp socket, there is no connection setup to speak of, since udp is connectionless. ...
...pr_connect blocks until either the connection is successfully established or an error occurs. the function uses the lesser of the provided timeout and the os's connect timeout. in particular, if you specify pr_interval_no_timeout as the timeout, the os's connection time limit will be used. if the socket is a udp socket, there is no connection setup to speak of, since udp is connectionless. if pr_connect is invoked on a udp socket, it has an overloaded meaning: pr_connect merely saves the specified address as the default peer address for the socket, so that subsequently one can send and receive datagrams from the socket using pr_send and pr_recv instead of the usual pr_sendto and pr_recvfrom. ...

XPConnect wrappers
this document is a high-level overview of xpconnect wrapper objects (for the more technical description see xpconnect security membranes). for practical advice on dealing with wrappers, see safely accessing content dom from chrome. developers in the know understand that wrappers play a large role in xpconnect, and that we have a lot of them. less informed developers understand that wrappers exist and are somehow important, but they don't know when they should use what wrappers, or if they should be seeing a wrapper. note: wrappers can appear in the console log; for example "[object xraywrapper [object blah]]". because these are wrapped, you won't be able to peek down inside them from the console. ...
...that we have a lot of them. less informed developers understand that wrappers exist and are somehow important, but they don't know when they should use what wrappers, or if they should be seeing a wrapper. note: wrappers can appear in the console log; for example "[object xraywrapper [object blah]]". because these are wrapped, you won't be able to peek down inside them from the console. basic xpconnect objects xpcwrappednative these objects are created when any natively implemented xpcom object (that is, any object implemented in c++) needs to be reflected into javascript. this includes all dom objects (including window) and chrome elements that are reflected into javascript. this wrapper is responsible for mapping calls from javascript into c++. this means that when you say window.focus(), ...
...ed xpcom object (that is, any object implemented in c++) needs to be reflected into javascript. this includes all dom objects (including window) and chrome elements that are reflected into javascript. this wrapper is responsible for mapping calls from javascript into c++. this means that when you say window.focus(), you're calling into xpcwrappednative code. if you call 'tostring()' and get "[xpconnect wrapped nsifoo]" then the reference is to a xpcwrappednative object with interface nsifoo. they are implicitly created by xpconnect and you should not have to worry about how that happens. there are several types of wrapped natives, but i won't cover those here. xpcwrappedjs these objects are the exact opposite of xpcwrappednative. they exist to reflect an object from javascript into c++. this...
... you pass your javascript object into a c++ function, we create one of these wrappers. for example, if you've implemented some component with an interface nsifoo and you pass your javascript object into a c++ function taking an nsifoo, an xpcwrappedjs is created around your object. c++ calls are routed through xpcwrappedjs code into your javascript implementation. these wrappers are created by xpconnect, so you should not have to worry about how to construct them or whether to construct them. double wrapping. there is one case where an xpcwrappednative wraps another wrapper object. this case is where a js object was passed in via some idl-declared interface, creating an xpcwrappedjs, and is now being returned to javascript via some other interface. in order to preserve api compatibility, an xpc...

RTCPeerConnection.addTransceiver() - Web APIs
init optional an object that conforms to the rtcrtptransceiverinit dictionary which provides any options that you may wish to specify when creating the new transceiver. ...
... init optional an object that conforms to the rtcrtptransceiverinit dictionary which provides any options that you may wish to specify when creating the new transceiver. ...
...eferred directionality. this value is used to initialize the new rtcrtptransceiver object's rtcrtptransceiver.direction property. sendencodings optional a list of encodings to allow when sending rtp media from the rtcrtpsender. each entry is of type rtcrtpencodingparameters. ...
...he remote peer's rtcpeerconnection's track event occurs, these are the streams that will be specified by that event. exceptions typeerror a string was specified as trackorkind which is not valid. the string must be either "audio" or "video". specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcpeerconnection.addtransceiver()' in that specification. candidate recommendation ...

RTCPeerConnection.createAnswer() - Web APIs
the createanswer() method on the rtcpeerconnection interface creates an sdp answer to an offer received from a remote peer during the offer/answer negotiation of a webrtc connection. the answer contains information about any media already attached to the session, codecs and options supported by the browser, and any ice candidates already gathered. the answer is delivered to the returned promise, and should then be sent to the source of the offer to continue the negotiation process. syntax apromise = rtcpeerconnection.createanswer([options]); rtcpeerconnection.createanswer(successcallback, failurecallback[, options]); parameters options optional an object which contains options which customize the answer; this is based on the rtcansweroptions dictionary. deprecated parameters in olde...
...rongly discouraged. you should update any existing code to use the promise-based version of createanswer() instead. the parameters for this form of createanswer() are described below, to aid in updating existing code. successcallback an rtcsessiondescriptioncallback which will be passed a single rtcsessiondescription object describing the newly-created answer. failurecallback an rtcpeerconnectionerrorcallback which will be passed a single domexception object explaining why the request to create an answer failed. options optional an optional rtcofferoptions object providing options requested for the answer. exceptions notreadableerror the identity provider wasn't able to provide an identity assertion. operationerror generation of the sdp failed for some reason; this is a gener...
... example here is a segment of code taken from the code that goes with the article signaling and video calling. this code comes from the handler for the message sent to carry an offer to another peer across the signaling channel. keep in mind that this is part of the signaling process, the transport layer for which is an implementation detail that's entirely up to you. in this case, a websocket connection is used to send a json message with a type field with the value "video-answer" to the other peer, carrying the answer to the device which sent the offer to connect. the contents of the object being passed to the sendtoserver() function, along with everything else in the promise fulfillment handler, depend entirely on your design pc.createanswer().then(function(answer) { return pc.setlocald...
.... the contents of the object being passed to the sendtoserver() function, along with everything else in the promise fulfillment handler, depend entirely on your design pc.createanswer().then(function(answer) { return pc.setlocaldescription(answer); }) .then(function() { // send the answer to the remote peer through the signaling server. }) .catch(handlegetusermediaerror); this asks rtcpeerconnection to create and return a new answer. in our promise handler, the returned answer is set as the description of the local end of the connection by calling setlocaldescription(). once that succeeds, the answer is sent to the signaling server using whatever protocol you see fit. promise.catch() is used to trap and handle errors. see handling the invitation in signaling and video calling to see th...

RTCPeerConnection: icegatheringstatechange event - Web APIs
the icegatheringstatechange event is sent to the onicegatheringstatechange event handler on an rtcpeerconnection when the state of the ice candidate gathering process changes. this signifies that the value of the connection's icegatheringstate property has changed. when ice firststarts to gather connection candidates, the value changes from new to gathering to indicate that the process of collecting candidate configurations for the connection has begun. when the value changes to complete, all of the transports that make up the rtcpeerconnection have finished gathering ice candidates. bubbles no cancelable no interface event event handler onicegatheringstatechange note: while you can determine that ice candidate gathering is complete by wa...
... icegatheringstatechange events and checking for the value of icegatheringstate to become complete, you can also simply have your handler for the icecandidate event look to see if its candidate property is null. this also indicates that collection of candidates is finished. examples this example creates a handler for icegatheringstatechange events. ...
...d checking for the value of icegatheringstate to become complete, you can also simply have your handler for the icecandidate event look to see if its candidate property is null. this also indicates that collection of candidates is finished. examples this example creates a handler for icegatheringstatechange events. ...
...let connection = ev.target; switch(connection.icegatheringstate) { case "gathering": /* collection of candidates has begun */ break; case "complete": /* collection of candidates is finished */ break; } } likewise, you can use addeventlistener() to add a listener for icegatheringstatechange events: pc.addeventlistener("icegatheringstatechange", ev => { let connection = ev.target; switch(connection.icegatheringstate) { case "gathering": /* collection of candidates has begun */ break; case "complete": /* collection of candidates is finished */ break; } }, false); specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'icecandidatestat...

RTCPeerConnection.onicecandidateerror - Web APIs
the event offers properties describing the error to help you handle it appropriately. example pc.onicecandidateerror = function(event) { if (event.errorcode >= 300 && event.errorcode <= 699) { // stun errors are in the range 300-699. ...
...the event offers properties describing the error to help you handle it appropriately. example pc.onicecandidateerror = function(event) { if (event.errorcode >= 300 && event.errorcode <= 699) { // stun errors are in the range 300-699. ...
...the event offers properties describing the error to help you handle it appropriately. ...
...w more error codes; see // rfc 5766, section 15 for details. } else if (event.errorcode >= 700 && event.errorcode <= 799) { // server could not be reached; a specific error number is // provided but these are not yet specified. } } specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcpeerconnection.onicecandidateerror' in that specification. candidate recommendation initial specification. ...

RTCPeerConnection.onnegotiationneeded - Web APIs
the rtcpeerconnection interface's onnegotiationneeded property is an eventlistener which specifies a function which is called to handle the negotiationneeded event when it occurs on an rtcpeerconnection instance. this event is fired when a change has occurred which requires session negotiation. this negotiation should be carried out as the offerer, because some session changes cannot be negotiated as the answerer. most commonly, the negotiationneeded event is fired after a send track is added to the rtcpeerconnection. if the session is modified in a manner that requires negotiation while a negotiation is already in progress, no negotiationneeded event will fire until negotiation completes, and only then if negotiation is still needed. ...
...e session changes cannot be negotiated as the answerer. most commonly, the negotiationneeded event is fired after a send track is added to the rtcpeerconnection. if the session is modified in a manner that requires negotiation while a negotiation is already in progress, no negotiationneeded event will fire until negotiation completes, and only then if negotiation is still needed. syntax rtcpeerconnection.onnegotiationneeded = eventhandler; value this should be set to a function you provide which is passed a single parameter: an event object containing the negotiationneeded event. there's no additional information provided in the event; anything you need, you can get by examining the properties of the rtcpeerconnection. example this example, derived from the example in signaling and video ...
...ameter: an event object containing the negotiationneeded event. there's no additional information provided in the event; anything you need, you can get by examining the properties of the rtcpeerconnection. example this example, derived from the example in signaling and video calling, establishes a handler for negotiationneeded events to handle creating an offer, configuring the local end of the connection, and sending the offer to the remote peer. pc.onnegotiationneeded = function() { pc.createoffer().then(function(offer) { return pc.setlocaldescription(offer); }) .then(function() { // send the offer to the remote peer through the signaling server }); }) .catch(reporterror); } first, it creates the offer by calling createoffer(). when that succeeds, the offer is passed...
...eeded = function() { pc.createoffer().then(function(offer) { return pc.setlocaldescription(offer); }) .then(function() { // send the offer to the remote peer through the signaling server }); }) .catch(reporterror); } first, it creates the offer by calling createoffer(). when that succeeds, the offer is passed into setlocaldescription() to set the local description for the connection. once that's succeeded in turn, the offer can be sent to the signaling server for delivery to the remote peer. specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcpeerconnection.onnegotiationneeded' in that specification. candidate recommendation initial specification. ...

RTCPeerConnection.onsignalingstatechange - Web APIs
the onsignalingstatechange event handler property of the rtcpeerconnection interface specifies a function to be called when the signalingstatechange event occurs on an rtcpeerconnection interface. the function receives as input the event object of type event; this event is sent when the peer connection's signalingstate changes, which may happen either because of a call to setlocaldescription() or to setremotedescription(). syntax rtcpeerconnection.onsignalingstatechange = errorhandler; value set this to a function which you provide that receives an event object as input; this contains the signalingstatechange event. this event object doesn't provide details about what changed, but you can examine the signalingstate property to determine what the new state is. you may also, as always, set u...
...er; value set this to a function which you provide that receives an event object as input; this contains the signalingstatechange event. this event object doesn't provide details about what changed, but you can examine the signalingstate property to determine what the new state is. ...
...t. this event object doesn't provide details about what changed, but you can examine the signalingstate property to determine what the new state is. you may also, as always, set up a handler for the signalingstatechange event using addeventlistener(): myrtcpeerconnection.addeventlistener("signalingstatechange", mysignalingstatechangehandler); or, using an anonymous (inline) handler: myrtcpeerconnection.addeventlistener("signalingstatechange", event => { /* handle the event here */ }); example this snippet shows a handler for signalingstatechange that looks for the "have-local-pranswer" signaling state—indicating that a remote offer has been received and a local description of type "pranswer" has been applied in response. pc.onsignalingstatechange = function(event) { if (pc.signaling...
...ceived and a local description of type "pranswer" has been applied in response. pc.onsignalingstatechange = function(event) { if (pc.signalingstate === "have-local-pranswer") { // setlocaldescription() has been called with an answer } }; specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcpeerconnection.onsignalingstatechange' in that specification. candidate recommendation initial specification. ...

RTCPeerConnection.peerIdentity - Web APIs
if an error occcurs while attempting to validate an incoming identity assertion (that is, the information describing a peer's identity), the promise is rejected. ...
... if an error occcurs while attempting to validate an incoming identity assertion (that is, the information describing a peer's identity), the promise is rejected. ...
... if an error occcurs while attempting to validate an incoming identity assertion (that is, the information describing a peer's identity), the promise is rejected. ...
...tedescription() doesn't need to wait for validation to occur before it resolves. example in this example, a function, getidentityassertion(), is created which asynchronously waits for the peer's identity to be verified, then returns the identity to the caller. if an error occurs and the promise is rejected, this logs the error to the console and returns null to the caller. let pc = new rtcpeerconnection(); /* ... */ async function getidentityassertion(pc) { try { const identity = await pc.peeridentity; return identity; } catch(err) { console.log("error identifying remote peer: ", err); return null; } } specifications specification status comment identity for webrtc candidate recommendation initial specification. ...

RTCPeerConnection: peeridentity event - Web APIs
once resolved, its value is the new identity. ...
...once resolved, its value is the new identity. ...
...once resolved, its value is the new identity. ...
...nnection.onpeeridentity property. bubbles no cancelable no interface event event handler property onpeeridentity important: this event and its event handler have been removed from the specification and are no longer available. instead of using this event to detect when an identity is available, simply wait for the promise returned by rtcpeerconnection.peeridentity to be resolved. once resolved, its value is the new identity. examples for the correct way to detect a new peer identity, see rtcpeerconnection.peeridentity. specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'peeridentity' in that specification. candidate recommendation ...

RTCPeerConnection.remoteDescription - Web APIs
the read-only property rtcpeerconnection.remotedescription returns a rtcsessiondescription describing the session (which includes configuration and media information) for the remote end of the connection. if this hasn't been set yet, this is null. the returned value typically reflects a remote description which has been received over the signaling server (as either an offer or an answer) and then put into effect by your code calling rtcpeerconnection.setremotedescription() in response. syntax var sessiondescription = peerconnection.remotedescription; on a more fundamental level, the returned value is the value of rtcpeerconnection.pendingremotedescription if that property isn't null; otherwise, the value of rtcpeerconnection.currentremotedescription is returned. see pending and current de...
...code calling rtcpeerconnection.setremotedescription() in response. syntax var sessiondescription = peerconnection.remotedescription; on a more fundamental level, the returned value is the value of rtcpeerconnection.pendingremotedescription if that property isn't null; otherwise, the value of rtcpeerconnection.currentremotedescription is returned. see pending and current descriptions in webrtc connectivity for details on this algorithm and why it's used. example this example looks at the remotedescription and displays an alert containing the rtcsessiondescription object's type and sdp fields. ...
...remotedescription if that property isn't null; otherwise, the value of rtcpeerconnection.currentremotedescription is returned. see pending and current descriptions in webrtc connectivity for details on this algorithm and why it's used. example this example looks at the remotedescription and displays an alert containing the rtcsessiondescription object's type and sdp fields. ...
...ype and sdp fields. var pc = new rtcpeerconnection(); … var sd = pc.remotedescription; if (sd) { alert("remote session: type='" + sd.type + "'; sdp description='" + sd.sdp + "'"); } else { alert("no remote session yet."); } specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcpeerconnection.remotedescription' in that specification. candidate recommendation initial specification. ...

RTCPeerConnection.removeTrack() - Web APIs
the rtcpeerconnection.removetrack() method tells the local end of the connection to stop sending media from the specified track, without actually removing the corresponding rtcrtpsender from the list of senders as reported by rtcpeerconnection.getsenders(). if the track is already stopped, or is not in the connection's senders list, this method has no effect. if the connection has already been negotiated (signalingstate is set to "stable"), it is marked as needing to be negotiated again; the remote peer won't experience the change until this negotiation occurs. a negotiationneeded event is sent to the rtcpeerconnection to let the local end know this negotiation must occur. syntax pc.removetrack(sender); parameters mediatrack a rtcrtpsender specifying the sender to remove from the connec...
...egotiated again; the remote peer won't experience the change until this negotiation occurs. a negotiationneeded event is sent to the rtcpeerconnection to let the local end know this negotiation must occur. syntax pc.removetrack(sender); parameters mediatrack a rtcrtpsender specifying the sender to remove from the connection. return value undefined. exceptions invalidstateerror the connection is not open. example this example adds a video track to a connection and sets up a listener on a close button which removes the track when the user clicks the button. ...
...tpsender specifying the sender to remove from the connection. return value undefined. exceptions invalidstateerror the connection is not open. example this example adds a video track to a connection and sets up a listener on a close button which removes the track when the user clicks the button. ...
... = new rtcpeerconnection(); var track = stream.getvideotracks()[0]; sender = pc.addtrack(track, stream); }); document.getelementbyid("closebutton").addeventlistener("click", function(event) { pc.removetrack(sender); pc.close(); }, false); specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcpeerconnection.removetrack()' in that specification. candidate recommendation initial specification. ...

RTCPeerConnectionIceErrorEvent.address - Web APIs
the rtcpeerconnectioniceerrorevent property address is a string which indicates the local ip address being used to communicate with the stun or turn server during negotiations. the error which occurred involved this address. syntax let address = rtcpeerconnectioniceerrorevent.address; value a domstring which specifies the local ip address of the network connection to the ice server with which negotiations were occurring when the error occurred. this address identifies the network interface on the local device which is being used to attempt to establish the connection to the remote peer. this can be useful on multi-homed systems—devices with more than one network connection—to determine which network interface is being used. for example, on a mobile phone, there are typically at least tw...
.... this address identifies the network interface on the local device which is being used to attempt to establish the connection to the remote peer. this can be useful on multi-homed systems—devices with more than one network connection—to determine which network interface is being used. for example, on a mobile phone, there are typically at least two network interfaces available: the cellular connection and a wifi connection. if the local ip address isn't exposed as part of a local candidate, the value of address is null. ...
...d. for example, on a mobile phone, there are typically at least two network interfaces available: the cellular connection and a wifi connection. if the local ip address isn't exposed as part of a local candidate, the value of address is null. examples this example creates a handler for icecandidateerror events which creates human readable messages describing the local network interface for the connection as well as the ice server that was being used to try to open the connection, then calls a function to display those as well as the event's errortext property's contents. pc.addeventlistener("icecandidateerror", (event) => { let networkinfo = `[local interface: ${event.address}:${event.port}`; let iceserverinfo = `[ice server: ${event.url}`; showmessage(errortext, iceserverinfo, network...
...ty's contents. pc.addeventlistener("icecandidateerror", (event) => { let networkinfo = `[local interface: ${event.address}:${event.port}`; let iceserverinfo = `[ice server: ${event.url}`; showmessage(errortext, iceserverinfo, networkinfo); }); specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcpeerconnectioniceerrorevent.address' in that specification. candidate recommendation initial definition. ...

RTCPeerConnectionIceErrorEvent - Web APIs
the rtcpeerconnectioniceerrorevent interface—based upon the event interface—provides details pertaining to an ice error announced by sending an icecandidateerror event to the rtcpeerconnection object. constructor rtcpeerconnectioniceerrorevent() creates and returns a new rtcpeerconnectioniceerrorevent object, with its type and other properties initialized as specified in the parameters. you will not normally create an object of this type yourself. ...
...es details pertaining to an ice error announced by sending an icecandidateerror event to the rtcpeerconnection object. constructor rtcpeerconnectioniceerrorevent() creates and returns a new rtcpeerconnectioniceerrorevent object, with its type and other properties initialized as specified in the parameters. you will not normally create an object of this type yourself. properties the rtcpeerconnectioniceerrorevent interface includes the properties found on the event interface, as well as the following properties: address read only a domstring providing the local ip address used to communicate with the stun or turn server being used to negotiate the connection, or null if the local ip address has not yet been exposed as part of a local ice candidate. errorcode read only an unsigned i...
...aining the stun reason text returned by the stun or turn server. if communication with the stun or turn server couldn't be established at all, this string will be a browser-specific string explaining the error. port read only an unsigned integer value giving the port number over which communication with the stun or turn server is taking place, using the ip address given in address. null if the connection hasn't been established (that is, if address is null). url read only a domstring indicating the url of the stun or turn server with which the error occurred. methods rtcpeerconnectioniceerrorevent has no methods other than any provided by the parent interface, event. examples tbd specifications specification status comment webrtc 1.0: real-time communication b...
...address is null). url read only a domstring indicating the url of the stun or turn server with which the error occurred. methods rtcpeerconnectioniceerrorevent has no methods other than any provided by the parent interface, event. examples tbd specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcpeerconnectioniceerrorevent' in that specification. candidate recommendation initial definition. ...

ResizeObserver.disconnect() - Web APIs
editor's draft initial definition. ...
... editor's draft initial definition. ...
... editor's draft initial definition. ...
... editor's draft initial definition. ...

SharedWorkerGlobalScope: connect event - Web APIs
the connect event is fired in shared workers at their sharedworkerglobalscope when a new client connects. bubbles no cancelable no interface messageevent event handler property sharedworkerglobalscope.onconnect examples this example shows a shared worker file — when a connection to the worker occurs from a main thread via a messageport, the onconnect event handler fires. the event object is a messageevent. the connecting port can be referenced through the event object's ports parameter; this reference can have an onmessage handler attached to it to handle messages coming in through the port, and its postmessage() method can be used to send messages back to the main thread using the worker. ...
...main thread via a messageport, the onconnect event handler fires. the event object is a messageevent. the connecting port can be referenced through the event object's ports parameter; this reference can have an onmessage handler attached to it to handle messages coming in through the port, and its postmessage() method can be used to send messages back to the main thread using the worker. ...
... living standard ...
... living standard ...

SharedWorkerGlobalScope.onconnect - Web APIs
the onconnect property of the sharedworkerglobalscope interface is an event handler representing the code to be called when the connect event is raised — that is, when a messageport connection is opened between the associated sharedworker and the main thread. syntax onconnect = function() { ... }; examples this example shows a shared worker file — when a connection to the worker occurs from a main thread via a messageport, the onconnect event handler fires. the event object is a messageevent. the connecting port can be referenced through the event object's ports parameter; this reference can have an onmessage handler attached to it to handle messages coming in through the port, and its postmessage() method can be used to send messages back to the main thread using the worker. ...
...om a main thread via a messageport, the onconnect event handler fires. the event object is a messageevent. the connecting port can be referenced through the event object's ports parameter; this reference can have an onmessage handler attached to it to handle messages coming in through the port, and its postmessage() method can be used to send messages back to the main thread using the worker. onconnect = function(e) { var port = e.ports[0]; port.onmessage = function(e) { var workerresult = 'result: ' + (e.data[0] * e.data[1]); port.postmessage(workerresult); } port.start(); } for a complete running example, see our basic shared worker example (run shared worker.) note: the data property of the event object used to be null in firefox. as of version 65 it is now i...
...erresult); } port.start(); } for a complete running example, see our basic shared worker example (run shared worker.) note: the data property of the event object used to be null in firefox. as of version 65 it is now initialized to an empty string, as per spec (bug 1508824). specifications specification status comment html living standardthe definition of 'onconnect' in that specification. living standard browser compatibility the compatibility table in this page is generated from structured data. if you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. desktopmobilechromeedgefirefoxinternet exploreroperasafariandroid webviewchrome for androidfirefox for androidopera for...
...dard browser compatibility the compatibility table in this page is generated from structured data. if you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. ...

Window: gamepaddisconnected event - Web APIs
the gamepaddisconnected event is fired when the browser detects that a gamepad has been disconnected. ...
... the gamepaddisconnected event is fired when the browser detects that a gamepad has been disconnected. ...
... the gamepaddisconnected event is fired when the browser detects that a gamepad has been disconnected. ...
... the gamepaddisconnected event is fired when the browser detects that a gamepad has been disconnected. ...

Connection - HTTP
the connection general header controls whether or not the network connection stays open after the current transaction finishes. if the value sent is keep-alive, the connection is persistent and not closed, allowing for subsequent requests to the same server to be done. connection-specific header fields such as connection and keep-alive are prohibited in http/2. chrome and firefox ignore them in http/2 responses, but safari conforms to the http/2 spec requirements and won’t load any response which contains them. ...
...ed, allowing for subsequent requests to the same server to be done. connection-specific header fields such as connection and keep-alive are prohibited in http/2. chrome and firefox ignore them in http/2 responses, but safari conforms to the http/2 spec requirements and won’t load any response which contains them. except for the standard hop-by-hop headers (keep-alive, transfer-encoding, te, connection, trailer, upgrade, proxy-authorization and proxy-authenticate), any hop-by-hop headers used by the message must be listed in the connection header, so that the first proxy knows it has to consume them and not forward them further. standard hop-by-hop headers can be listed too (it is often the case of keep-alive, but this is not mandatory). header type general header forbi...
...ion and proxy-authenticate), any hop-by-hop headers used by the message must be listed in the connection header, so that the first proxy knows it has to consume them and not forward them further. standard hop-by-hop headers can be listed too (it is often the case of keep-alive, but this is not mandatory). header type general header forbidden header name yes syntax connection: keep-alive connection: close directives close indicates that either the client or the server would like to close the connection. this is the default on http/1.0 requests. any comma-separated list of http headers [usually keep-alive only] indicates that the client would like to keep the connection open. having a persistent connection is the default on http/1.1 requests. the list of hea...
... connection. this is the default on http/1.0 requests. any comma-separated list of http headers [usually keep-alive only] indicates that the client would like to keep the connection open. having a persistent connection is the default on http/1.1 requests. the list of headers are the name of the header to be removed by the first non-transparent proxy or cache in-between: these headers define the connection between the emitter and the first entity, not the destination node. ...

CONNECT - HTTP
the http connect method starts two-way communications with the requested resource. it can be used to open a tunnel. for example, the connect method can be used to access websites that use ssl (https). the client asks an http proxy server to tunnel the tcp connection to the desired destination. the server then proceeds to make the connection on behalf of the client. once the connection has been established by the server, the proxy server continues to proxy the tcp stream to and from the client. connect is a hop-by-hop method. ...
...onnection on behalf of the client. once the connection has been established by the server, the proxy server continues to proxy the tcp stream to and from the client. connect is a hop-by-hop method. request has body no successful response has body yes safe no idempotent no cacheable no allowed in html forms no syntax connect www.example.com:443 http/1.1 example some proxy servers might need authority to create a tunnel. see also the proxy-authorization header. ...
...rom the client. connect is a hop-by-hop method. request has body no successful response has body yes safe no idempotent no cacheable no allowed in html forms no syntax connect www.example.com:443 http/1.1 example some proxy servers might need authority to create a tunnel. see also the proxy-authorization header. ...
... allowed in html forms no syntax connect www.example.com:443 http/1.1 example some proxy servers might need authority to create a tunnel. see also the proxy-authorization header. ...

PR_ConnectContinue
syntax #include <prio.h> prstatus pr_connectcontinue( prfiledesc *fd, print16 out_flags); parameters the function has the following parameters: fd a pointer to a prfiledesc object representing a socket. out_flags the out_flags field of the poll descriptor returned by pr_poll(). returns if the nonblocking connect has successfully completed, pr_connectcontinue returns pr_success. if pr_connectcontinue() returns pr_failure, call pr_geterror(): - pr_in_progress_error: the nonblocking connect is still in progress and has not completed yet. the caller should poll the file descriptor for the in_flags pr_poll_write|pr_poll_except and retry pr_connectcontinue later when pr_poll() returns. - other errors: the nonblocking connect has failed with this error code. descr...
...r_failure, call pr_geterror(): - pr_in_progress_error: the nonblocking connect is still in progress and has not completed yet. the caller should poll the file descriptor for the in_flags pr_poll_write|pr_poll_except and retry pr_connectcontinue later when pr_poll() returns. - other errors: the nonblocking connect has failed with this error code. description continue a nonblocking connect. after a nonblocking connect is initiated with pr_connect() (which fails with pr_in_progress_error), one should call pr_poll() on the socket, with the in_flags pr_poll_write | pr_poll_except. ...
...onnectcontinue later when pr_poll() returns. - other errors: the nonblocking connect has failed with this error code. description continue a nonblocking connect. after a nonblocking connect is initiated with pr_connect() (which fails with pr_in_progress_error), one should call pr_poll() on the socket, with the in_flags pr_poll_write | pr_poll_except. when pr_poll() returns, one calls pr_connectcontinue() on the socket to determine whether the nonblocking connect has completed or is still in progress. repeat the pr_poll(), pr_connectcontinue() sequence until the nonblocking connect has completed. ...

XPConnect
xpconnect is a bridge between javascript and xpcom. with xpconnect, you can use xpcom components from javascript code, and interact with javascript objects from within xpcom components. xpconnect is part of firefox and is actively used in xul applications. documentation architecture basics xpconnect, javascript, xpcom, xul... using components how to talk with xpcom components. xpconnect and xpidl faq a faq about using xpconnect and xpidl. this page needs to migrate to mdn. ...
... components. xpconnect is part of firefox and is actively used in xul applications. documentation architecture basics xpconnect, javascript, xpcom, xul... using components how to talk with xpcom components. xpconnect and xpidl faq a faq about using xpconnect and xpidl. this page needs to migrate to mdn. ...
...ox and is actively used in xul applications. documentation architecture basics xpconnect, javascript, xpcom, xul... using components how to talk with xpcom components. xpconnect and xpidl faq a faq about using xpconnect and xpidl. this page needs to migrate to mdn. ...

nsISpeculativeConnect
netwerk/base/public/nsispeculativeconnect.idlscriptable lets non-networking code provide hints to the networking layer that an http connection attempt to a particular site is likely to happen soon; this lets the networking layer begin setting up tcp and, if appropriate, ssl handshakes to save time when the connection is actually opened later. 1.0 66 introduced gecko 15.0 inherits from: nsisupports last changed in gecko 15.0 (firefox 15.0 / thunderbird 15.0 / seamonkey 2.12) to use this service, simply call nsisupports.queryinterface() on the nsiioservice you plan to use for the connection, to get access to the i/o service's implementation of nsispeculativeconnect. ...
...n is actually opened later. 1.0 66 introduced gecko 15.0 inherits from: nsisupports last changed in gecko 15.0 (firefox 15.0 / thunderbird 15.0 / seamonkey 2.12) to use this service, simply call nsisupports.queryinterface() on the nsiioservice you plan to use for the connection, to get access to the i/o service's implementation of nsispeculativeconnect. then call speculativeconnect() to let the networking layer know what you might be doing in the future. method overview void speculativeconnect(in nsiuri auri, in nsiinterfacerequestor acallbacks, in nsieventtarget atarget); methods speculativeconnect() call this method to hint to the networking layer that a new transaction for the specified uri is likely to happen soon. the code implementing this method may use this in...
... uri is likely to happen soon. the code implementing this method may use this information to start a tcp and/or ssl level handshake for that resource immediately so that it is ready (or at least in the process of becoming ready) when the transaction is actually submitted. no obligation is taken on by the implementer, nor is the submitter obligated to actually open the new channel. void speculativeconnect( in nsiuri auri, in nsiinterfacerequestor acallbacks, in nsieventtarget atarget ); parameters auri the uri of the hinted transaction. acallbacks any security callbacks for use with ssl for interfaces such as nsibadcertlistener. may be null. atarget the thread on which the release of the callbacks will occur. may be null for "any thread". see also nsiioservice blog post: making firefox s...

RTCPeerConnection.generateCertificate() - Web APIs
the generatecertificate() method of the rtcpeerconnection interface creates and stores an x.509 certificate and corresponding private key then returns an rtccertificate, providing access to it. syntax var cert = rtcpeerconnection.generatecertificate(keygenalgorithm) parameters keygenalgorithm a domstring identifying the algorithm to use in creating the key. rtcpeerconnection.generatecertificate() is a static method, so it is always called on the rtcpeerconnection interface itself, not an instance thereof. return value a reference to an rtccertificate object. ...
...syntax var cert = rtcpeerconnection.generatecertificate(keygenalgorithm) parameters keygenalgorithm a domstring identifying the algorithm to use in creating the key. rtcpeerconnection.generatecertificate() is a static method, so it is always called on the rtcpeerconnection interface itself, not an instance thereof. return value a reference to an rtccertificate object. ...
...rtificate() is a static method, so it is always called on the rtcpeerconnection interface itself, not an instance thereof. return value a reference to an rtccertificate object. example rtcpeerconnection.generatecertificate({ name: 'rsassa-pkcs1-v1_5', hash: 'sha-256', moduluslength: 2048, publicexponent: new uint8array([1, 0, 1]) }).then(function(cert) { var pc = new rtcpeerconnection({certificates: [cert]}); }); specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'generatecertificate()' in that specification. candidate recommendation initial definition. ...

RTCPeerConnection.getSenders() - Web APIs
the rtcpeerconnection method getsenders() returns an array of rtcrtpsender objects, each of which represents the rtp sender responsible for transmitting one track's data. a sender object provides methods and properties for examining and controlling the encoding and transmission of the track's data. syntax var senders = rtcpeerconnection.getsenders(); return value an array of rtcrtpsender objects, one for each track on the connection. the array is empty if there are no rtp senders on the connection. the order of the returned rtcrtpsenders is not defined by the specification, and may change from one call to getsenders() to the next. example in this example, a setmuting() function is shown. this function takes as input an rtcpeerconnection, pc, and a boolean, muting. the function gets the l...
...k on the connection. the array is empty if there are no rtp senders on the connection. the order of the returned rtcrtpsenders is not defined by the specification, and may change from one call to getsenders() to the next. example in this example, a setmuting() function is shown. this function takes as input an rtcpeerconnection, pc, and a boolean, muting. the function gets the list of the peer connection's senders and iterates over every sender, setting the corresponding media track's enabled to the inverse of the specified muting. function setmuting(pc, muting) { let senderlist = pc.getsenders(); senderlist.foreach(sender) { sender.track.enabled = !muting; } } specifications specification status comment webrtc 1.0: real-time communication between bro...
... every sender, setting the corresponding media track's enabled to the inverse of the specified muting. function setmuting(pc, muting) { let senderlist = pc.getsenders(); senderlist.foreach(sender) { sender.track.enabled = !muting; } } specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcpeerconnection.getsenders()' in that specification. candidate recommendation initial specification. ...

RTCPeerConnection.getStreamById() - Web APIs
the rtcpeerconnection.getstreambyid() method returns the mediastream with the given id that is associated with local or remote end of the connection. if no stream matches, it returns null. this property has been replaced with the rtcpeerconnection.getlocalstreams and rtcpeerconnection.getremotestreams properties. if you have code that uses stream, you will need to update, since browsers have begun to remove support for stream. syntax var mediastream = pc.getstream(id); parameters id is a domstring corresponding to the stream to return. ...
...ream, you will need to update, since browsers have begun to remove support for stream. syntax var mediastream = pc.getstream(id); parameters id is a domstring corresponding to the stream to return. ...
...domstring corresponding to the stream to return. example var stream = pc.getstreambyid(mytrackid); if (stream) { console.log("found stream: " + stream.id); } polyfill running the following code before any other code will create rtcpeerconnection.prototype.getstreambyid() if it's not natively available. ...

RTCPeerConnection.iceGatheringState - Web APIs
the read-only property rtcpeerconnection.icegatheringstate returns an enum of type rtcicegatheringstate that describes connection's ice gathering state. this lets you detect, for example, when collection of ice candidates has finished. you can detect when the value of this property changes by watching for an event of type icegatheringstatechange. syntax var state = rtcpeerconnection.icegatheringstate; value the possible values are those of an enum of type rtcicegatheringstate. rtcicegatheringstate enum the rtcicegatheringstate enum defines string constants which reflect the current status of ice gathering, as returned using the rtcpeerconnection.icegatheringstate property. you can detect when this value changes by watching for an event of type icegatheringstatechange. constan...
... enum of type rtcicegatheringstate. rtcicegatheringstate enum the rtcicegatheringstate enum defines string constants which reflect the current status of ice gathering, as returned using the rtcpeerconnection.icegatheringstate property. you can detect when this value changes by watching for an event of type icegatheringstatechange. constant description "new" the peer connection was just created and hasn't done any networking yet. "gathering" the ice agent is in the process of gathering candidates for the connection. "complete" the ice agent has finished gathering candidates. if something happens that requires collecting new candidates, such as a new interface being added or the addition of a new ice server, the state will revert to "gathering"...
... "gathering" the ice agent is in the process of gathering candidates for the connection. "complete" the ice agent has finished gathering candidates. if something happens that requires collecting new candidates, such as a new interface being added or the addition of a new ice server, the state will revert to "gathering" to gather those candidates. example var pc = new rtcpeerconnection(); var state = pc.icegatheringstate; specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcpeerconnection.icegatheringstate' in that specification. candidate recommendation initial specification. ...

RTCPeerConnection.localDescription - Web APIs
the read-only property rtcpeerconnection.localdescription returns an rtcsessiondescription describing the session for the local end of the connection. if it has not yet been set, this is null. syntax var sessiondescription = peerconnection.localdescription; on a more fundamental level, the returned value is the value of rtcpeerconnection.pendinglocaldescription if that property isn't null; otherwise, the value of rtcpeerconnection.currentlocaldescription is returned. see pending and current descriptions in webrtc connectivity for details on this algorithm and why it's used. example this example looks at the localdescription and displays an alert containing the rtcsessiondescription object's type and sdp fields. ...
...inglocaldescription if that property isn't null; otherwise, the value of rtcpeerconnection.currentlocaldescription is returned. see pending and current descriptions in webrtc connectivity for details on this algorithm and why it's used. example this example looks at the localdescription and displays an alert containing the rtcsessiondescription object's type and sdp fields. ...
...s type and sdp fields. var pc = new rtcpeerconnection(); … var sd = pc.localdescription; if (sd) { alert("local session: type='" + sd.type + "'; sdp description='" + sd.sdp + "'"); } else { alert("no local session yet."); } specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcpeerconnection.localdescription' in that specification. candidate recommendation initial specification. ...

RTCPeerConnection.onaddstream - Web APIs
the rtcpeerconnection.onaddstream event handler is a property containing the code to execute when the addstream event, of type mediastreamevent, is received by this rtcpeerconnection. such an event is sent when a mediastream is added to this connection by the remote peer. the event is sent immediately after the call setremotedescription() and doesn't wait for the result of the sdp negotiation. important: this property has been removed from the specification; you should now use rtcpeerconnection.ontrack to watch for track events instead. it is included here in order to help you adapt existing code and understand existing samples, which may not be up-to-date yet. syntax rtcpeerconnection.onaddstream = eventhandler; value a function which handles addstream events. these events, of type me...
...tion; you should now use rtcpeerconnection.ontrack to watch for track events instead. it is included here in order to help you adapt existing code and understand existing samples, which may not be up-to-date yet. syntax rtcpeerconnection.onaddstream = eventhandler; value a function which handles addstream events. these events, of type mediastreamevent, are sent when streams are added to the connection by the remote peer. the first time an event occurs may be nearly immediately after the remote end of the connection is set using rtcpeerconnection.setremotedescription(); it doesn't wait for a particular stream to be accepted or rejected using sdp negotiation. example this code, based on an older version of our signaling and video calling sample, responds to addstream events by setting the v...
... ...

RTCPeerConnection.onicecandidate - Web APIs
the rtcpeerconnection property onicecandidate property is an eventhandler which specifies a function to be called when the icecandidate event occurs on an rtcpeerconnection instance. this happens whenever the local ice agent needs to deliver a message to the other peer through the signaling server. this lets the ice agent perform negotiation with the remote peer without the browser itself needing to know any specifics about the technology being used for signaling; simply implement this method to use whatever messaging technology you choose to send the ice candidate to the remote peer. syntax rtcpeerconnection.onicecandidate = eventhandler; value this should be set to a function which you provide that accepts as input an rtcpeerconnectioniceevent object representing the icecandidate event. t...
...you don't need to watch for this explicitly; instead, if you need to sense the end of signaling, you should watch for a icegatheringstatechange event indicating that the ice negotiation has transitioned to the complete state. ...
... candidate recommendation initial specification. ...

RTCPeerConnection.onidentityresult - Web APIs
an event handler always has one single parameter, containing the event, here of type rtcidentityevent. ...
...an event handler always has one single parameter, containing the event, here of type rtcidentityevent. ...
...an event handler always has one single parameter, containing the event, here of type rtcidentityevent. ...

RTCPeerConnection.onpeeridentity - Web APIs
an event handler always has one single parameter, containing the event, here of type event. ...
...an event handler always has one single parameter, containing the event, here of type event. ...
...an event handler always has one single parameter, containing the event, here of type event. ...

RTCPeerConnection.onremovestream - Web APIs
the removestream event has been removed from the webrtc specification in favor of the existing removetrack event on the remote mediastream and the corresponding mediastream.onremovetrack event handler property of the remote mediastream. the rtcpeerconnection api is now track-based, so having zero tracks in the remote stream is equivalent to the remote stream being removed and the old removestream event. ...
...nt has been removed from the webrtc specification in favor of the existing removetrack event on the remote mediastream and the corresponding mediastream.onremovetrack event handler property of the remote mediastream. the rtcpeerconnection api is now track-based, so having zero tracks in the remote stream is equivalent to the remote stream being removed and the old removestream event. the rtcpeerconnection.onremovestream event handler is a property containing the code to execute when the removestream event, of type mediastreamevent, is received by this rtcpeerconnection. ...
...i is now track-based, so having zero tracks in the remote stream is equivalent to the remote stream being removed and the old removestream event. the rtcpeerconnection.onremovestream event handler is a property containing the code to execute when the removestream event, of type mediastreamevent, is received by this rtcpeerconnection. such an event is sent when a mediastream is removed from this connection. syntax peerconnection.onremovestream = function; values function is the name of a user-defined function, without the () suffix or any parameters, or an anonymous function declaration, such as function(event) {...}. an event handler always has one single parameter, containing the event, here of type mediastreamevent. example pc.onremovestream = function(ev) { alert("onremovestream ev...

RTCPeerConnection.ontrack - Web APIs
the rtcpeerconnection property ontrack is an eventhandler which specifies a function to be called when the track event occurs, indicating that a track has been added to the rtcpeerconnection. the function receives as input the event object, of type rtctrackevent; this event is sent when a new incoming mediastreamtrack has been created and associated with an rtcrtpreceiver object which has been added to the set of receivers on connection. syntax rtcpeerconnection.ontrack = eventhandler; value set ontrack to be a function you provide that accepts as input a rtctrackevent object describing the new track and how it's being used. this information includes the mediastreamtrack object representing the new track, the rtcrtpreceiver and rtcrtptransceiver, and a list of mediastream objects which indi...
...accepts as input a rtctrackevent object describing the new track and how it's being used. this information includes the mediastreamtrack object representing the new track, the rtcrtpreceiver and rtcrtptransceiver, and a list of mediastream objects which indicates which stream or streams the track is part of.. example this example, taken from the code for the article signaling and video calling, connects the incoming track to the <video> element which will be used to display the incoming video. pc.ontrack = function(event) { document.getelementbyid("received_video").srcobject = event.streams[0]; document.getelementbyid("hangup-button").disabled = false; }; the first line of our ontrack event handler takes the first stream in the incoming track and sets the srcobject attribute to that. thi...
...the incoming track to the <video> element which will be used to display the incoming video. pc.ontrack = function(event) { document.getelementbyid("received_video").srcobject = event.streams[0]; document.getelementbyid("hangup-button").disabled = false; }; the first line of our ontrack event handler takes the first stream in the incoming track and sets the srcobject attribute to that. this connects that stream of video to the element so that it begins to be presented to the user. the second line of code simply enables a "hang up" button, which the user can use to disconnect from the call. specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcpeerconnection.ontrack' in that specification. candid...

RTCPeerConnection.sctp - Web APIs
the read-only sctp property on the rtcpeerconnection interface returns an rtcsctptransport describing the sctp transport over which sctp data is being sent and received. if sctp hasn't been negotiated, this value is null. the sctp transport is used for transmitting and receiving data for any and all rtcdatachannels on the peer connection. syntax var sctp = rtcpeerconnection.sctp; value a rtcsctptransport object describing the sctp transport being used by the rtcpeerconnection for transmitting and receiving on its data channels, or null if sctp negotiation hasn't happened. ...
...s null. the sctp transport is used for transmitting and receiving data for any and all rtcdatachannels on the peer connection. syntax var sctp = rtcpeerconnection.sctp; value a rtcsctptransport object describing the sctp transport being used by the rtcpeerconnection for transmitting and receiving on its data channels, or null if sctp negotiation hasn't happened. ...
... candidate recommendation initial specification. ...

RTCPeerConnectionIceEvent() - Web APIs
if null, the event indicates the end of candidate gathering. "url" (optional, default is null): the url of the stun or turn server which was used to gather the candidate. if the candidate was not gathered by a stun or turn server, this value must be null. ...
... if null, the event indicates the end of candidate gathering. "url" (optional, default is null): the url of the stun or turn server which was used to gather the candidate. if the candidate was not gathered by a stun or turn server, this value must be null. ...
...the candidate was not gathered by a stun or turn server, this value must be null. "bubbles" (optional, default is false): inherited from eventinit(), this boolean option indicates whether or not the event must bubble. "cancelable" (optional, default is false, inherited from eventinit(), this boolean indicates whether or not the event can be canceled. return value a newly-created rtcpeerconnectioniceevent, configured as specified in the provided options. specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcpeerconnectioniceevent()' in that specification. candidate recommendation initial definition. ...

RTCPeerConnectionIceEvent - Web APIs
the rtcpeerconnectioniceevent interface represents events that occurs in relation to ice candidates with the target, usually an rtcpeerconnection. only one event is of this type: icecandidate. properties a rtcpeerconnectioniceevent being an event, this event also implements these properties. rtcpeerconnectioniceevent.candidate read only contains the rtcicecandidate containing the candidate associated with the event, or null if this event indicates that there are no further candidates to come. constructors rtcpeerconnectioniceevent() returns a new rtcpeerconnectioniceevent. it takes two parameters, the first being a domstring representing the type of the event; the second a dictionary containing the rtcicecandidate it refers to. ...
...ate containing the candidate associated with the event, or null if this event indicates that there are no further candidates to come. constructors rtcpeerconnectioniceevent() returns a new rtcpeerconnectioniceevent. it takes two parameters, the first being a domstring representing the type of the event; the second a dictionary containing the rtcicecandidate it refers to. methods a rtcpeerconnectioniceevent being an event, this event also implements these properties. there is no specific rtcdatachannelevent method. ...
...e type of the event; the second a dictionary containing the rtcicecandidate it refers to. methods a rtcpeerconnectioniceevent being an event, this event also implements these properties. there is no specific rtcdatachannelevent method. examples pc.onicecandidate = function( ev ) { alert("the ice candidate (transport address: '" + ev.candidate.candidate + "') has been added to this connection."); } specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcpeerconnectioniceevent' in that specification. candidate recommendation initial definition. ...

Window: gamepadconnected event - Web APIs
the gamepadconnected event is fired when the browser detects that a gamepad has been connected or the first time a button/axis of the gamepad is used. ...
... the gamepadconnected event is fired when the browser detects that a gamepad has been connected or the first time a button/axis of the gamepad is used. ...
... the gamepadconnected event is fired when the browser detects that a gamepad has been connected or the first time a button/axis of the gamepad is used. ...

PR_GetConnectStatus
get the completion status of a nonblocking connection. syntax prstatus pr_getconnectstatus(const prpolldesc *pd); parameter the function has the following parameter: pd a pointer to a prpolldesc satructure whose fd field is the socket and whose in_flags field must contain pr_poll_write and pr_poll_except. returns the function returns one of these values: if successful, pr_success. if unsuccessful, pr_failure. the reason for the failure can be retrieved via pr_geterror. if pr_geterror returns pr_in_progress_error, the nonblocking connection is still in progress and has not completed yet.other errors indicate that the connection has failed. ...
...l_write and pr_poll_except. returns the function returns one of these values: if successful, pr_success. if unsuccessful, pr_failure. the reason for the failure can be retrieved via pr_geterror. if pr_geterror returns pr_in_progress_error, the nonblocking connection is still in progress and has not completed yet.other errors indicate that the connection has failed. description after pr_connect on a nonblocking socket fails with pr_in_progress_error, you may wait for the connection to complete by calling pr_poll on the socket with the in_flags pr_poll_write | pr_poll_except. when pr_poll returns, call pr_getconnectstatus on the socket to determine whether the nonblocking connect has succeeded or failed. ...

PR_QueueJob_Connect
fn the function to be executed when the job is executed. arg a pointer to an argument passed to fn. joinable if pr_true, the job is joinable. if pr_false, the job is not joinable. see pr_joinjob. ...
... fn the function to be executed when the job is executed. arg a pointer to an argument passed to fn. joinable if pr_true, the job is joinable. if pr_false, the job is not joinable. see pr_joinjob. returns pointer to a prjob structure or null on error. ...

Fun With XBL and XPConnect
once the regular xul textfield widget is bound to this interface, it calls the auto complete function of the object using regular javascript. the basic model of interaction is as follows: binding to the xpcom object the widget holds onto an xpcom object that is the auto complete engine that will perform our auto complete lookups. ...
.../> </content> <implementation> <property name="autocompletesession"> <![cdata[ components.classes['component://netscape/messenger/autocomplete&type=addrbook']. getservice(components.interfaces.nsiautocompletesession); ]]> </property> so we've defined a property on the widget called autocompletesession. the initial value of this property evaluates to an xp-connect object. now accesses to autocompletesession will return the xp-connect object. exposing the xpcom interfaces one somewhat nasty trick you need to do is to manually expose the interfaces of the xpcom object that you want your widget to support. all you have to do is specifically defining a method on the xbl widget which forwards the method call to the xpcom object. <method name="autocomplet...

MutationObserver.disconnect() - Web APIs
the mutationobserver method disconnect() tells the observer to stop watching for mutations. the observer can be reused by calling its observe() method again. syntax mutationobserver.disconnect() parameters none. return value undefined. note: all notifications of mutations that have already been detected, but not yet reported to the observer, are discarded. usage notes if the element being observed is removed from the dom, and then subsequently released by the browser's garbage collection mechanism, the mutationobserver is likewise deleted. example this example creates an observer, then disconnects from it, leaving it available for possible reuse. const targetnode = document.queryselector("#someelement"); const observeroptions = { childlist: true, attributes: true } const o...
...erver is likewise deleted. example this example creates an observer, then disconnects from it, leaving it available for possible reuse. const targetnode = document.queryselector("#someelement"); const observeroptions = { childlist: true, attributes: true } const observer = new mutationobserver(callback); observer.observe(targetnode, observeroptions); /* some time later... */ observer.disconnect(); specifications specification status comment domthe definition of 'mutationobserver.disconnect()' in that specification. living standard ...

PeformanceObserver.disconnect() - Web APIs
the disconnect() method of the performanceobserver interface is used to stop the performance observer from receiving any performance entry events. syntax performanceobserver.disconnect(); example var observer = new performanceobserver(function(list, obj) { var entries = list.getentries(); for (var i=0; i < entries.length; i++) { // process "mark" and "frame" events } }); observer.observe({entrytypes: ["mark", "frame"]}); function perf_observer(list, observer) { // process the "measure" event // ... ...
...nnect(); example var observer = new performanceobserver(function(list, obj) { var entries = list.getentries(); for (var i=0; i < entries.length; i++) { // process "mark" and "frame" events } }); observer.observe({entrytypes: ["mark", "frame"]}); function perf_observer(list, observer) { // process the "measure" event // ... // disable additional performance events observer.disconnect(); } var observer2 = new performanceobserver(perf_observer); observer2.observe({entrytypes: ["measure"]}); specifications specification status comment performance timeline level 2the definition of 'disconnect()' in that specification. candidate recommendation initial definition of disconnect() method. ...

PerformanceTiming.connectEnd - Web APIs
this interface of this property is deprecated in the navigation timing level 2 specification. please use the performancenavigationtiming interface instead. the legacy performancetiming.connectend read-only property returns an unsigned long long representing the moment, in miliseconds since the unix epoch, where the connection is opened network. if the transport layer reports an error and the connection establishment is started again, the last connection establisment end time is given. if a persistent connection is used, the value will be the same as performancetiming.fetchstart. ...
...nectend read-only property returns an unsigned long long representing the moment, in miliseconds since the unix epoch, where the connection is opened network. if the transport layer reports an error and the connection establishment is started again, the last connection establisment end time is given. if a persistent connection is used, the value will be the same as performancetiming.fetchstart. a connection is considered as opened when all secure connection handshake, or socks authentication, is terminated. syntax time = performancetiming.connectend; specifications specification status comment navigation timingthe definition of 'performancetiming.connectend' in that specification. recommendation initial definition. ...

PerformanceTiming.connectStart - Web APIs
this interface of this property is deprecated in the navigation timing level 2 specification. please use the performancenavigationtiming interface instead. the legacy performancetiming.connectstart read-only property returns an unsigned long long representing the moment, in miliseconds since the unix epoch, where the request to open a connection is sent to the network. if the transport layer reports an error and the connection establishment is started again, the last connection establisment start time is given. if a persistent connection is used, the value will be the same as performancetiming.fetchstart. ...
...representing the moment, in miliseconds since the unix epoch, where the request to open a connection is sent to the network. if the transport layer reports an error and the connection establishment is started again, the last connection establisment start time is given. if a persistent connection is used, the value will be the same as performancetiming.fetchstart. syntax time = performancetiming.connectstart; specifications specification status comment navigation timingthe definition of 'performancetiming.connectstart' in that specification. recommendation initial definition. ...

RTCPeerConnection: addstream event - Web APIs
the obsolete addstream event is sent to an rtcpeerconnection when new media, in the form of a mediastream object, has been added to it. important: this event has been removed from the webrtc specification. you should instead watch for the track event, which is sent for each media track added to the rtcpeerconnection. bubbles no cancelable no interface mediastreamevent event handler property rtcpeerconnection.onaddstream you can, similarly, watch for streams to be removed from the connection by monitoring the removestream event. examples this example looks to determine if the user's browser supports the track event. ...
...diastreamevent event handler property rtcpeerconnection.onaddstream you can, similarly, watch for streams to be removed from the connection by monitoring the removestream event. examples this example looks to determine if the user's browser supports the track event. if it does, a track event listener is set up; otherwise, an addstream event listener is set up. pc is an rtcpeerconnection. if (pc.addtrack !== undefined) { pc.ontrack = ev => { ev.streams.foreach(stream => doaddstream(stream)); } } else { pc.onaddstream = ev => { doaddstream(ev.stream); } } this calls a function doaddstream() once for each stream being added to the rtcpeerconnection, regardless of whether the browser sends addstream or track. you can also use the addeventlistener() method to s...

RTCPeerConnection: datachannel event - Web APIs
bubbles no cancelable no interface rtcdatachannelevent event handler property ondatachannel examples this example sets up a function that handles datachannel events by gathering the information needed to communicate with the newly added rtcdatachannel and by adding event handlers for the events that occur on that channel. ...
...receivechannel = ev.channel; receivechannel.onmessage = myhandlemessage; receivechannel.onopen = myhandleopen; receivechannel.onclose = myhandleclose; }, false); receivechannel is set to the value of the event's channel property, which specifies the rtcdatachannel object representing the data channel linking the remote peer to the local one. ...

RTCPeerConnection.getDefaultIceServers() - Web APIs
the getdefaulticeservers() method of the rtcpeerconnection interface returns an array of objects based on the rtciceserver dictionary, which indicates what, if any, ice servers the browser will use by default if none are provided to the rtcpeerconnection in its rtcconfiguration. however, browsers are not required to provide any default ice servers at all. syntax var defaulticeservers = rtcpeerconnection.getdefaulticeservers(); return value an array of ice servers, specified as objects based on rtciceserver, which the browser will use if none are specified in the configuration of the rtcpeerconnection. if there are no defaults provided by the browser, the returned array is empty; this property's value is never null. ...
...yntax var defaulticeservers = rtcpeerconnection.getdefaulticeservers(); return value an array of ice servers, specified as objects based on rtciceserver, which the browser will use if none are specified in the configuration of the rtcpeerconnection. if there are no defaults provided by the browser, the returned array is empty; this property's value is never null. ...

RTCPeerConnection.getReceivers() - Web APIs
the rtcpeerconnection.getreceivers() method returns an array of rtcrtpreceiver objects, each of which represents one rtp receiver. each rtp receiver manages the reception and decoding of data for a mediastreamtrack on an rtcpeerconnection syntax var receivers = rtcpeerconnection.getreceivers(); return value an array of rtcrtpreceiver objects, one for each track on the connection. the array is empty if there are no rtp receivers on the connection. the order of the returned rtcrtpreceiver instances is not defined by the specification, and may change from one call to getreceivers() to the next. ...
... candidate recommendation initial specification. ...

RTCPeerConnection.ondatachannel - Web APIs
the rtcpeerconnection.ondatachannel property is an eventhandler which specifies a function which is called when the datachannel event occurs on an rtcpeerconnection. this event, of type rtcdatachannelevent, is sent when an rtcdatachannel is added to the connection by the remote peer calling createdatachannel(). at the time this event is received, the rtcdatachannel it indicates may not yet actually be open. be sure to wait for the "open" event to be fired on the new rtcdatachannel before using it. syntax rtcpeerconnection.ondatachannel = function; value set this property to be a function you provide which receives as input a single parameter: an rtcdatachannelevent which provides in its channel property the rtcdatachannel which has been created. example pc.ondatachannel = function(ev) ...
...l property the rtcdatachannel which has been created. example pc.ondatachannel = function(ev) { console.log('data channel is created!'); ev.channel.onopen = function() { console.log('data channel is open and ready to be used.'); }; }; specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcpeerconnection.ondatachannel' in that specification. candidate recommendation initial specification. ...

RTCPeerConnection.onicegatheringstatechange - Web APIs
the rtcpeerconnection.onicegatheringstatechange property is an eventhandler which specifies a function to be called when the icegatheringstatechange event is sent to an rtcpeerconnection instance. this happens when the ice gathering state—that is, whether or not the ice agent is actively gathering candidates—changes. you don't need to watch for this event unless you have specific reasons to want to closely monitor the state of ice gathering. syntax rtcpeerconnection.onicegatheringstatechange = eventhandler; value a function you provide which is passed a single parameter: an event object containing the icegatheringstatechange event. you can determine the new state of ice gathering by looking at the value of the rtcpeerconnection.icegatheringstate property. example this example updat...
... candidate recommendation initial specification. ...

RTCPeerConnection: removestream event - Web APIs
the obsolete removestream event was sent to an rtcpeerconnection to inform it that a mediastream had been removed from the connection. you can use the rtcpeerconnection interface's onremovestream property to set a handler for this event. this is the counterpart to the addstream event, which is also obsolete. bubbles no cancelable no interface mediastreamevent event handler property rtcpeerconnection.onremovestream important: this event has been removed from the webrtc specification in favor of the existing removetrack event on the remote mediastream and the corresponding mediastream.onremovetrack event handler property of the remote mediastream. ...
...bbles no cancelable no interface mediastreamevent event handler property rtcpeerconnection.onremovestream important: this event has been removed from the webrtc specification in favor of the existing removetrack event on the remote mediastream and the corresponding mediastream.onremovetrack event handler property of the remote mediastream. the rtcpeerconnection api is now track-based, so having zero tracks in the remote stream is equivalent to the remote stream being removed, which caused a removestream event. ...

RTCPeerConnection.setIdentityProvider() - Web APIs
the idp will be used only when an assertion is needed. if the signalingstate is set to "closed", an invalidstateerror is raised. syntax pc.setidentityprovider(domainname [, protocol] [, username]); there is no return value for this method. parameters domainname is a domstring is the domain name where the idp is. protocol optional is a domstring representing the protocol used to communicate with the idp. it defaults to "default" and is used to determine the url where the idp is listening. ...
...rn value for this method. parameters domainname is a domstring is the domain name where the idp is. protocol optional is a domstring representing the protocol used to communicate with the idp. it defaults to "default" and is used to determine the url where the idp is listening. username optional is a domstring representing the username associated with the idp. example var pc = new peerconnection(); pc.setidentityassertion("developer.mozilla.org"); specifications specification status comment identity for webrtcthe definition of 'rtcpeerconnection.setidentityprovider()' in that specification. candidate recommendation ...

RTCPeerConnection: track event - Web APIs
the track event is sent to the ontrack event handler on rtcpeerconnections after a new track has been added to an rtcrtpreceiver which is part of the connection. bubbles yes cancelable no interface rtctrackevent event handler property ontrack by the time this event is delivered, the new track has been fully added to the peer connection. see track event types in rtctrackevent for details. examples this example shows code that creates a new rtcpeerconnection, then adds a new track event handler. ...
...bbles yes cancelable no interface rtctrackevent event handler property ontrack by the time this event is delivered, the new track has been fully added to the peer connection. see track event types in rtctrackevent for details. examples this example shows code that creates a new rtcpeerconnection, then adds a new track event handler. ...

ReportingObserver.disconnect() - Web APIs
the disconnect() method of the reportingobserver interface stops a reporting observer that had previously started observing from collecting reports. after calling disconnect(), neither reportingobserver.takerecords() nor the records parameter of the reportingobserver() callback will return any reports. the associated observer will no longer be active. syntax reportingobserverinstance.disconnect() examples let options = { types: ['deprecation'], buffered: true } let observer = new reportingobserver(function(reports, observer) { reportbtn.onclick = () => displayreports(reports); }, options); observer.observe() ... ...
...he reportingobserver() callback will return any reports. the associated observer will no longer be active. syntax reportingobserverinstance.disconnect() examples let options = { types: ['deprecation'], buffered: true } let observer = new reportingobserver(function(reports, observer) { reportbtn.onclick = () => displayreports(reports); }, options); observer.observe() ... observer.disconnect() specifications specification status comment reporting apithe definition of 'reportingobserver.disconnect()' in that specification. editor's draft ...

Connecting to Remote Content - Archive of obsolete content
"start tamper" button, for every request made you will get a popup dialog for tampering with it before it is sent. you can use it to view or even modify the data in a request, and then inspect the result. this can be a lot of work because there is a lot of web activity in a normal firefox window, so use it sparingly. a tutorial on tamper data can be found here. note: you should always test your connection code to cover edge cases, like when there is no internet connection, or the computer is connected to a local network with no internet access (like at an airport or hotel room). make sure you're not telling users everything is ok, or worse, bombarding them with error messages. « previousnext » this tutorial was kindly donated to mozilla by appcoast. ...

BlackConnect - Archive of obsolete content
blackconnect was a blackwood subproject, trying to build a java-to-xpcom bridge to allow interoperability between java and xpcom components. the goal was to be able to implement xpcom components written in java instead of c++. blackconnect is now superseeded by javaxpcom. for the remainders of the blackconnect project, see here. ...

LiveConnect Reference - Archive of obsolete content
javascript-to-java these classes allow a java object to access javascript code. jsexception the public class jsexception extends runtimeexception, and is thrown when javascript returns an error. jsobject the public class jsobject extends object. javascript objects are wrapped in an instance of the class jsobject and passed to java, allowing java to manipulate javascript objects. ...

How to investigate Disconnect failures
this article will guide you on how to investigate disconnect failures. an example of such a failure disconnect failures happens when one side is closing the connection and mozmill is unable to send the information over the bridge or when firefox crashes. usually disconnects happens when a modal dialog freezes and we cannot close it sp we close firefox with the modal frozen. we cannot investigate failures via mozmill, because we do not catch the crashes, so the crashes' information is not logged; we have to go to ci machines and investigate directly. check if firefox crashed: windows: [user]/appdata\roaming\mozilla\firefox\crash reports ubuntu: [user/home]/.mozilla/firefox/crash reports and there we can check by timestamp if firefox crashed when we had the disconnect. check...

connectGATT() - Web APIs
the bluetoothdevice.connectgatt() method returns a promise that resolves to an instance of bluetoothgattremoteserver. syntax instanceofbluetoothdevice.connectgatt().then(function(bluetoothgattremoteserver) { ... }) returns a promise that resolves to an instance of bluetoothgattremoteserver. parameters none. ...

BluetoothRemoteGATTServer.connect() - Web APIs
the bluetoothremotegattserver.connect() method causes the script execution environment to connect to this.device. syntax bluetoothremotegattserver.connect() .then(function(bluetoothremotegattserver) { ... }) returns a promise that resolves to a bluetoothremotegattserver. parameters none. specifications specification status comment web bluetooththe definition of 'connect()' in that specification. draft initial definition. ...

BluetoothRemoteGATTServer.connected - Web APIs
the bluetoothremotegattserver.connected read-only property returns a boolean value that returns true while this script execution environment is connected to this.device. it can be false while the user agent is physically connected. syntax var connected = bluetoothremotegattserver.connected specifications specification status comment web bluetooththe definition of 'connected' in that specification. draft initial definition. ...

BluetoothRemoteGATTServer.disconnect() - Web APIs
the bluetoothremotegattserver.disconnect() method causes the script execution environment to disconnect from this.device. syntax bluetoothremotegattserver.disconnect() returns none. parameters none. specifications specification status comment web bluetooththe definition of 'disconnect()' in that specification. draft initial definition. ...

Gamepad.connected - Web APIs
the gamepad.connected property of the gamepad interface returns a boolean indicating whether the gamepad is still connected to the system. if the gamepad is connected, the value is true; if not, it is false. syntax readonly attribute boolean connected; example var gp = navigator.getgamepads()[0]; console.log(gp.connected); value a boolean. specifications specification status comment gamepadthe definition of 'gamepad.connected' in that specification. working draft initial definition ...

IntersectionObserver.disconnect() - Web APIs
the intersectionobserver method disconnect() stops watching all of its target elements for visibility changes. syntax intersectionobserver.disconnect(); parameters none. return value undefined. specifications specification status comment intersection observerthe definition of 'intersectionobserver.disconnect()' in that specification. working draft initial definition. ...

MIDIConnectionEvent - Web APIs
the midiconnectionevent interface of the web midi api is the event passed to the onstatechange event handler of the midiaccess interface and the onstatechange event of the midiports interface. this occurs any time a new port becomes available, or when a previously available port becomes unavailable. for example, this event is fired whenever a midi device is either plugged in to or unplugged from a computer. constructor midiconnectionevent.midiconnectionevent creates a new midiconnectionevent object. properties midiconnectionevent.port returns a reference to a midiport instance for a port that has been connected or disconnected." examples specifications specification status comment web midi api working draft initial definition. ...

Navigator.connection - Web APIs
the navigator.connection read-only property returns a networkinformation object containing information about the system's connection, such as the current bandwidth of the user's device or whether the connection is metered. this could be used to select high definition content or low definition content based on the user's connection. syntax networkinformation = navigator.connection value a networkinformation object. specifications specification status comment network information apithe definition of 'navigator.connection' in that specification. draft initial specification ...

PerformanceTiming.secureConnectionStart - Web APIs
this interface of this property is deprecated in the navigation timing level 2 specification. please use the performancenavigationtiming interface instead. the legacy performancetiming.secureconnectionstart read-only property returns an unsigned long long representing the moment, in miliseconds since the unix epoch, where the secure connection handshake starts. if no such connection is requested, it returns 0. syntax time = performancetiming.secureconnectionstart; specifications specification status comment navigation timingthe definition of 'performancetiming.secureconnectionstart' in that specification. recommendation initial definition. ...

RTCPeerConnection.getIdentityAssertion() - Web APIs
the rtcpeerconnection.getidentityassertion() method initiates the gathering of an identity assertion. this has an effect only if the signalingstate is not "closed". the method returns immediately. if the assertion cannot be generated, an idpassertionerror will be sent to the object. it is not expected for the application dealing with the rtcpeerconnection: this is automatically done; an explicit call only allows to anticipate the need. syntax pc.getidentityassertion(); there is neither parameter nor return value for this method. example var pc = new peerconnection(); pc.getidentityassertion(); // not mandatory, but we know that we will need it in the future. specifications specification status comment identity for webrtcthe definition of 'rtcpeerconne...

RTCPeerConnection.getTransceivers() - Web APIs
the rtcpeerconnection interface's gettransceivers() method returns a list of the rtcrtptransceiver objects being used to send and receive data on the connection. syntax transceiverlist = rtcpeerconnection.gettransceivers(); parameters none. return value an array of the rtcrtptransceiver objects representing the transceivers handling sending and receiving all media on the rtcpeerconnection. the list is in the order in which the transceivers were added to the connection. example the following snippet of code stops all transceivers associated with an rtcpeerconnection. pc.gettransceivers().foreach(transceiver => { transceiver.stop(); }); specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcpeercon...

RTCPeerConnection: identityresult event - Web APIs
note: while older versions of the webrtc specification used events to report assertions, this has been deprecated and removed from the specification. instead, the peeridentity property returns a promise that resolves with an identity or rejects if an error occurs or if unable to validate the identity. ...

RTCPeerConnection: idpassertionerror event - Web APIs
an idpassertionerror event informs the target, a rtcpeerconnection object, that the identity provider (idp) encountered an error when trying to generate an identity assertion. an event handler for this event can be added using the rtcpeerconnection.onidpassertionerror property. bubbles no cancelable no interface rtcidentityerrorevent event handler property onidpassertionerror warning: this event is no longer used; instead, you can detect an assertion error by detecting when the promise returned by rtcpeerconnection.peeridentity is rejected. specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'idpassertionerror' in that specification. candidate rec...

RTCPeerConnection: idpvalidationerror event - Web APIs
an idpvalidationerror event informs the target, a rtcpeerconnection object's onidpvalidationerror event handler, that the identity provider (idp) encountered an error while validating an identity assertion. an event handler for this event can be added using the rtcpeerconnection.onidpvalidationerror property. bubbles no cancelable no interface rtcidentityerrorevent event handler property onidpvalidationerror warning: this event is no longer used; instead, you can detect a validation error by detecting when the promise returned by rtcpeerconnection.peeridentity is rejected. specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'idpvalidationerror' in th...

RTCPeerConnection.onidpassertionerror - Web APIs
the rtcpeerconnection.onidpassertionerror event handler is a property containing the code to execute whent the idpassertionerror event, of type rtcidentityerrorevent, is received by this rtcpeerconnection. such an event is sent when the associated identity provider (idp) encounters an error while generating an identity assertion. this event handler is deprecated. you should instead detect idp assertion errors by handling rejection of the promise returned by rtcpeerconnection.peeridentity. syntax peerconnection.onidpassertionerror = function; values function is the name of a user-defined function, without the () suffix or any parameters, or an anonymous function declaration, such as function(event) {...}. an event handler always has one single parameter, containing the event, here of ty...

RTCPeerConnection.onidpvalidationerror - Web APIs
the rtcpeerconnection.onidpvalidationerror event handler is a property containing the code to execute whent the idpvalidationerror event, of type rtcidentityerrorevent, is received by this rtcpeerconnection. such an event is sent when the associated identity provider (idp) encounters an error while validating an identity assertion. this event handler is obsolete. you should instead detect idp validation errors by watching for the promise returned by rtcpeerconnection.peeridentity to be rejected. syntax peerconnection.onidpvalidationerror = function; values function is the name of a user-defined function, without the () suffix or any parameters, or an anonymous function declaration, such as function(event) {...}. an event handler always has one single parameter, containing the event, he...

RTCPeerConnection: signalingstatechange event - Web APIs
an signalingstatechange event is sent to an rtcpeerconnection to notify it that its signaling state, as indicated by the signalingstate property, has changed. bubbles no cancelable no interface event event handler property rtcpeerconnection.onsignalingstatechange examples given an rtcpeerconnection, pc, and an updatestatus() function that presents status information to the user, this code sets up an event handler to let the user know when the ice negotiation process finishes up. pc.addeventlistener("signalingstatechange", ev => { switch(pc.signalingstate) { case "stable": updatestatus("ice negotiation complete"); break; } }, false); using onsignalingstatechange, it looks like this: pc.onsignalingstatechange = ev => ...

RTCPeerConnectionIceEvent.candidate - Web APIs
the read-only candidate property of the rtcpeerconnectioniceevent interface returns the rtcicecandidate associated with the event. syntax var candidate = event.candidate; value an rtcicecandidate object representing the ice candidate that has been received, or null to indicate that there are no further candidates for this negotiation session. example pc.onicecandidate = function( ev ) { alert("the ice candidate (transport address: '" + ev.candidate.candidate + "') has been added to this connection."); } specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcpeerconnectioniceevent.candidate' in that specification. candidate recommendation initial specification. ...

RTCPeerConnection: idpvalidationerror event - Web APIs
an idpvalidationerror event informs the target, a rtcpeerconnection object, that the identity provider (idp) encountered an error when trying to validate an identity assertion. an event handler for this event can be added via the rtcpeerconnection.onidpvalidationerror property. bubbles no cancelable no interface rtcidentityerrorevent event handler property onidpvalidationerror important: this event is no longer used; it was removed from the specification long ago. instead, you should watch for the rtcpeerconnection.peeridentity promise to be rejected with an operationerror. specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'idpvalidationerror' in t...

USB.onconnect - Web APIs
the onconnect property of the usb interface is an event handler called whenever a paired device is connected. syntax usb.onconnect = connectfunction specifications specification status comment webusbthe definition of 'onconnect' in that specification. draft initial definition. ...

USB.ondisconnect - Web APIs
the ondisconnect property of the usb is an event handler called whenever a paired device is disconnected. syntax usb.ondisconnect = disconnectfunction specifications specification status comment webusbthe definition of 'ondisconnect' in that specification. draft initial definition. ...

Window.ongamepadconnected - Web APIs
the ongamepadconnected property of the window interface represents an event handler that will run when a gamepad is connected (when the gamepadconnected event fires). the event object is of type gamepadevent. syntax window.ongamepadconnected = function() { ... }; examples window.ongamepadconnected = function(event) { // all buttons and axes values can be accessed through event.gamepad; }; specifications specification status comment gamepadthe definition of 'gamepadconnected event' in that specification. working draft initial definition ...

Window.ongamepaddisconnected - Web APIs
the ongamepaddisconnected property of the window interface represents an event handler that will run when a gamepad is disconnected (when the gamepaddisconnected event fires). the event object is of type gamepadevent. syntax window.ongamepaddisconnected = function() { ... }; examples window.ongamepaddisconnected = function() { // a gamepad has been disconnected }; specifications specification status comment gamepadthe definition of 'gamepaddisconnected event' in that specification. working draft initial definition ...

WorkerNavigator.connection - Web APIs
the workernavigator.connection read-only property returns a networkinformation object containing information about the system's connection, such as the current bandwidth of the user's device or whether the connection is metered. this could be used to select high definition content or low definition content based on the user's connection. syntax connectioninfo = self.navigator.connection specifications specification status comment network information apithe definition of 'navigator.connection' in that specification. draft initial specification ...

Link types: preconnect - HTML: Hypertext Markup Language
the preconnect keyword for the rel attribute of the <link> element is a hint to browsers that the user is likely to need resources from the target resource's origin, and therefore the browser can likely improve the user experience by preemptively initiating a connection to that origin. specifications specification status comment html living standardthe definition of 'preconnect' in that specification. living standard ...

Index - Web APIs
api, audiocontext, method, reference, référence(2), web audio api, createmediastreamdestination the mediastream is created when the node is created and is accessible via the mediastreamaudiodestinationnode's stream attribute. this stream can be used in a similar way as a mediastream obtained via navigator.getusermedia — it can, for example, be sent to a remote peer using the rtcpeerconnection addstream() method. 129 audiocontext.createmediastreamsource() api, audio, audiocontext, audionode, media, mediastream, mediastreamtrack, method, reference, web, web audio, web audio api, createmediastreamsource for more details about media stream audio source nodes, check out the mediastreamaudiosourcenode reference page. 130 audiocontext.createmediastreamtrack...
...ence, web audio api the audionode interface is a generic interface for representing an audio processing module. examples include: 157 audionode.channelcount api, audionode, property, reference, web audio api, channelcount the channelcount property of the audionode interface represents an integer used to determine how many channels are used when up-mixing and down-mixing connections to any inputs to the node. 158 audionode.channelcountmode api, audionode, property, reference, web audio api, channelcountmode the possible values of channelcountmode and their meanings are: 159 audionode.channelinterpretation api, audionode, property, reference, web audio api, channelinterpretation when the number of channels doesn't match between an...
... 159 audionode.channelinterpretation api, audionode, property, reference, web audio api, channelinterpretation when the number of channels doesn't match between an input and an output, up- or down-mixing happens according the following rules. this can be somewhat controlled by setting the audionode.channelinterpretation property to speakers or discrete: 160 audionode.connect() api, audio, audionode, media, method, reference, web audio api, connect if the destination is a node, connect() returns a reference to the destination audionode object, allowing you to chain multiple connect() calls. in some browsers, older implementations of this interface return undefined. 161 audionode.context api, audionode, context, property, reference, web audio a...
...And 295 more matches

Signaling and video calling - Web APIs
through this third server, the two devices can locate one another, and exchange negotiation messages. ...
...rial will guide you through building a two-way video-call. webrtc is a fully peer-to-peer technology for the real-time exchange of audio, video, and data, with one central caveat. a form of discovery and media format negotiation must take place, as discussed elsewhere, in order for two devices on different networks to locate one another. this process is called signaling and involves both devices connecting to a third, mutually agreed-upon server. through this third server, the two devices can locate one another, and exchange negotiation messages. in this article, we will further enhance the websocket chat first created as part of our websocket documentation (this article link is forthcoming; it isn't actually online yet) to support opening a two-way video call between users. you can try out thi...
...umentation (this article link is forthcoming; it isn't actually online yet) to support opening a two-way video call between users. you can try out this example on glitch, and you can remix the example to experiment with it as well. you can also look at the full project on github. ...
...And 85 more matches

Index
sions (firefox 2 and 3, for example). 6 creating a python xpcom component guide, needshelp, pyxpcom, xpcom, xpcom:language bindings creating applications with mozilla already provides a tutorial for making a simple javascript or c++ component (implementing the nsisimple interface). here is how to make the same component in python using pyxpcom. ...
...creating a python xpcom component guide, needshelp, pyxpcom, xpcom, xpcom:language bindings creating applications with mozilla already provides a tutorial for making a simple javascript or c++ component (implementing the nsisimple interface). here is how to make the same component in python using pyxpcom. 7 fun with xbl and xpconnect xbl, xpcom, xpcom:language bindings, xpconnect no summary! 8 generating guids add-ons, developing mozilla, developing_mozilla:tools, extensions, tools, xpcom guids are used in mozilla programming for identifying several types of entities, including xpcom interfaces (this type of guids is callled iid), components (cid), and legacy add-ons—like extensions and themes—that were created prior to firefox 1.5. add-ons ...
...bedding, landing, mozilla, xpcom, xpcom:language bindings an xpcom language binding is a bridge between a particular language and xpcom to provide access to xpcom objects from that language, and to let modules written in that language be used as xpcom objects by all other languages for which there are xpcom bindings. ...
...And 47 more matches

Using DTMF with WebRTC - Web APIs
the dtmf system is often referred to as "touch tone," after an old trade name for the system. webrtc doesn't send dtmf codes as audio data. instead, they're sent out-of-band, as rtp payloads. note, however, that although it's possible to send dtmf using webrtc, there is currently no way to detect or receive incoming dtmf. ...
... teleconferencing systems menu systems voicemail systems entry of credit card or other payment information passcode entry note: while the dtmf is not sent to the remote peer as audio, browsers may choose to play the corresponding tone to the local user as part of their user experience, since users are typically used to hearing their phone play the tones audibly. sending dtmf on an rtcpeerconnection a given rtcpeerconnection can have multiple media tracks sent or received on it. when you wish to transmit dtmf signals, you first need to decide which track to send them on, since dtmf is sent as a series of out-of-band payloads on the rtcrtpsender responsible for transmitting that track's data to the other peer. once the track is selected, you can obtain from its rtcrtpsender the rtcdtmfse...
...ther peer. once the track is selected, you can obtain from its rtcrtpsender the rtcdtmfsender object you'll use for sending dtmf. from there, you can simply call rtcdtmfsender.insertdtmf() to enqueue dtmf signals to be sent on the track to the other peer. the rtcrtpsender will then send the tones to the other peer as packets alongside the track's audio data. each time a tone is sent, the rtcpeerconnection receives a tonechange event with a tone property specifying which tone finished playing, which is an opportunity to update interface elements, for example. when the tone buffer is empty, indicating that all the tones have been sent, a tonechange event with its tone property set to "" (an empty string) is delivered to the connection object. if you'd like to know more about how this works, read...
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sslfnc.html
be an ssl session and will not have certificate-based authentication, tamper detection, or encryption. ssl_request_certificate is a server option that requests a client to authenticate itself. ssl_require_certificate is a server option that requires a client to authenticate itself (only if ssl_request_certificate is also on). if client does not provide certificate, the connection terminates. default state is a third state similar to on, that provides backward compatibility with older netscape server products. ssl_handshake_as_client controls the behavior of pr_accept,. if this option is off, the pr_accept configures the ssl socket to handshake as a server. if it is on, then pr_accept configures the ssl socket to handshake as a client, even though it accept...
...minates. default state is a third state similar to on, that provides backward compatibility with older netscape server products. ssl_handshake_as_client controls the behavior of pr_accept,. if this option is off, the pr_accept configures the ssl socket to handshake as a server. if it is on, then pr_accept configures the ssl socket to handshake as a client, even though it accepted the connection as a tcp server. ssl_handshake_as_server controls the behavior of pr_connect. if this option is off, then pr_connect configures the ssl socket to handshake as a client. if it is on, then pr_connect configures the ssl socket to handshake as a server, even though it connected as a tcp client. ssl_enable_fdx tells the ssl library whether the application will have two thr...
...rites should set this to pr_true. in nss 2.8, the ssl_enable_fdx option only affects the behavior of non-blocking ssl sockets. see the description below for more information on this option. ssl_enable_ssl3 enables the application to communicate with ssl v3. factory setting is on. if you turn this option off, an attempt to establish a connection with a peer that only understands ssl v3 will fail. ssl_enable_ssl2 enables the application to communicate with ssl v2. factory setting is on. if you turn this option off, an attempt to establish a connection with a peer that only understands ssl v2 will fail. ssl_enable_tls is a peer of the ssl_enable_ssl2 and ssl_enable_ssl3 options. the ietf standard transport lay...
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A simple RTCDataChannel sample - Web APIs
the rtcdatachannel interface is a feature of the webrtc api which lets you open a channel between two peers over which you may send and receive arbitrary data. the api is intentionally similar to the websocket api, so that the same programming model can be used for each. in this example, we will open an rtcdatachannel connection linking two elements on the same page. while that's obviously a contrived scenario, it's useful for demonstrating the flow of connecting two peers. we'll cover the mechanics of accomplishing the connection and transmitting and receiving data, but we will save the bits about locating and linking to a remote computer for another example. the html first, let's take a quick look at the html that's needed. there's nothing incredibly complicated here. first, we have a coupl...
...ow of connecting two peers. we'll cover the mechanics of accomplishing the connection and transmitting and receiving data, but we will save the bits about locating and linking to a remote computer for another example. the html first, let's take a quick look at the html that's needed. there's nothing incredibly complicated here. first, we have a couple of buttons for establishing and closing the connection: <button id="connectbutton" name="connectbutton" class="buttonleft"> connect </button> <button id="disconnectbutton" name="disconnectbutton" class="buttonright" disabled> disconnect </button> then there's a box which contains the text input box into which the user can type a message to transmit, with a button to send the entered text. this <div> will be the first peer in the channel. ...
... box into which we'll insert the messages. this <div> block will be the second peer. <div class="messagebox" id="receivebox"> <p>messages received:</p> </div> the javascript code while you can just look at the code itself on github, below we'll review the parts of the code that do the heavy lifting. the webrtc api makes heavy use of promises. ...
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Index - MDN Web Docs Glossary: Definitions of Web-related terms
that the server cannot find the requested resource. 3 502 502, bad gateway, glossary, http errors, infrastructure, navigation an http error code meaning "bad gateway". 4 alpn alpn, draft, glossary, needscontent, tls application-layer protocol negotiation (alpn) is a tls extension which indicates what application layer protocol is negotiating the encryped connection without requiring additional round trips. 5 api codingscripting, glossary, infrastructure an api (application programming interface) is a set of features and rules that exist inside a software program (the application) enabling interaction with it through software - as opposed to a human user interface. the api can be seen as a simple contract (the interface) between the a...
... a manifest applied to it. 21 argument codingscripting, glossary, javascript an argument is a value (primitive or object) passed as input to a function. 22 arpanet glossary, infrastructure the arpanet (advanced research projects agency network) was an early computer network, constructed in 1969 as a robust medium to transmit sensitive military data and to connect leading research groups throughout the united states. arpanet first ran ncp (network control protocol) and subsequently the first version of the internet protocol or tcp/ip suite, making arpanet a prominent part of the nascent internet. arpanet was closed in early 1990. 23 array array, codingscripting, glossary, javascript, programming an array is an ordered collection of dat...
... the term asynchronous refers to or multiple related things happening without waiting for the previous one to complete). 25 attribute codingscripting, glossary, html an attribute extends an element, changing its behavior or providing metadata. 26 bandwidth glossary, infrastructure bandwidth is the measure of how much information can pass through a data connection in a given amount of time. it is usually measured in multiples of bits-per-second (bps), for example megabits-per-second (mbps) or gigabits-per-second (gbps). 27 base64 advanced, base64, javascript, typed arrays, uri, url, unicode problem, atob(), btoa() base64 is a group of similar binary-to-text encoding schemes that represent binary data in an ascii string format by tra...
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Using the Gamepad API - Web APIs
port many tasks previously requiring native code. the gamepad api is a way for developers and designers to access and use gamepads and other game controllers. the gamepad api introduces new events on the window object for reading gamepad and controller (hereby referred to as gamepad) state. ...
...e gamepads and other game controllers. the gamepad api introduces new events on the window object for reading gamepad and controller (hereby referred to as gamepad) state. in addition to these events, the api also adds a gamepad object, which you can use to query the state of a connected gamepad, and a navigator.getgamepads() method which you can use to get a list of gamepads known to the page. connecting to a gamepad when a new gamepad is connected to the computer, the focused page first receives a gamepadconnected event. if a gamepad is already connected when the page loaded, the gamepadconnected event is dispatched to the focused page when the user presses a button or moves an axis. in firefox, gamepads are only exposed to a page when the user interacts with one with the page visible. thi...
...mepad is already connected when the page loaded, the gamepadconnected event is dispatched to the focused page when the user presses a button or moves an axis. in firefox, gamepads are only exposed to a page when the user interacts with one with the page visible. this helps prevent gamepads being used for fingerprinting the user. once one gamepad has been interacted with, other gamepads that are connected will automatically be visible. you can use gamepadconnected like this: window.addeventlistener("gamepadconnected", function(e) { console.log("gamepad connected at index %d: %s. %d buttons, %d axes.", e.gamepad.index, e.gamepad.id, e.gamepad.buttons.length, e.gamepad.axes.length); }); each gamepad has a unique id associated with it, which is available on the event's gamepad proper...
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WebRTC API - Web APIs
prise webrtc makes it possible to share data and perform teleconferencing peer-to-peer, without requiring that the user installs plug-ins or any other third-party software. webrtc consists of several interrelated apis and protocols which work together to achieve this. the documentation you'll find here will help you understand the fundamentals of webrtc, how to set up and use both data and media connections, and more. interoperability because implementations of webrtc are still evolving, and because each browser has different levels of support for codecs and webrtc features, you should strongly consider making use of the adapter.js library provided by google before you begin to write your code. adapter.js uses shims and polyfills to smooth over the differences among the webrtc implementations...
...brtc adapter.js. webrtc concepts and usage webrtc serves multiple purposes; together with the media capture and streams api, they provide powerful multimedia capabilities to the web, including support for audio and video conferencing, file exchange, screen sharing, identity management, and interfacing with legacy telephone systems including support for sending dtmf (touch-tone dialing) signals. connections between peers can be made without requiring any special drivers or plug-ins, and can often be made without any intermediary servers. connections between two peers are represented by the rtcpeerconnection interface. once a connection has been established and opened using rtcpeerconnection, media streams (mediastreams) and/or data channels (rtcdatachannels) can be added to the connection. med...
...presented by objects based on the mediastreamtrack interface, may contain one of a number of types of media data, including audio, video, and text (such as subtitles or even chapter names). most streams consist of at least one audio track and likely also a video track, and can be used to send and receive both live media or stored media information (such as a streamed movie). you can also use the connection between two peers to exchange arbitrary binary data using the rtcdatachannel interface. this can be used for back-channel information, metadata exchange, game status packets, file transfers, or even as a primary channel for data transfer. more details and links to relevant guides and tutorials needed webrtc reference because webrtc provides interfaces that work together to accomplish a vari...
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Necko walkthrough
pens on the main thread, in a non-blocking fashion: make your request on the main thread, then carry on and get the async response later, also on the main thread. there is an option to receive ondataavailable specifically on a non-main thread, but all other calls happen on the main thread. ...
...non-blocking fashion: make your request on the main thread, then carry on and get the async response later, also on the main thread. there is an option to receive ondataavailable specifically on a non-main thread, but all other calls happen on the main thread. ...
...fically on a non-main thread, but all other calls happen on the main thread. ...
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Mozilla DOM Hacking Guide
dge of c++ and xpcom is assumed. if you don't know xpcom yet, and would like to be able to read this document quickly, you can read the introduction to xpcom for the dom. otherwise, for more detailed xpcom documentation, please see the xpcom project page. class info and helper classes introduction to class info class info is what gives the dom classes their correct behavior when used through xpconnect. it lies at the heart of the famous "xpcdom landing" that happened in may. we will talk a lot about xpconnect in this document, since it is so important for the dom. by "correct behavior", i mean "the intended behavior with respect to the specification or de facto standard". we will see that class info is mainly used to implement the dom level 0. the w3c dom is mainly implemented in idl. the goal...
...the dom. by "correct behavior", i mean "the intended behavior with respect to the specification or de facto standard". we will see that class info is mainly used to implement the dom level 0. the w3c dom is mainly implemented in idl. the goals of class info are twofold: interface flattening, and implementing behaviors that are not possible with idl alone. a brief introduction to javascript and xpconnect. before we begin the explanation of class info, i'd like to introduce quickly the javascript engine and xpconnect. in javascript, there is no knowledge of types, like there is in c++. a function for example can be represented by a jsfunction, a jsobject, a jsval, ... this means that when we use the dom from javascript, we pass arguments that have no type. however, since the dom is coded in c++, ...
...e and xpconnect. in javascript, there is no knowledge of types, like there is in c++. a function for example can be represented by a jsfunction, a jsobject, a jsval, ... this means that when we use the dom from javascript, we pass arguments that have no type. however, since the dom is coded in c++, we expect to receive an argument of the correct type for our function. this is one of the jobs of xpconnect. xpconnect will "wrap" the argument in a wrapper that will be of the type expected by our c++ function. similarly, then return type of the c++ function will be wrapped by xpconnect so that javascript can use it safely. when, in javascript, a client tries to access a dom object or a dom method on a dom object, the js engine asks xpconnect to search for the relevant c++ method to call. for example...
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Implementing controls using the Gamepad API - Game development
this article looks at implementing an effective, cross-browser control system for web games using the gamepad api, allowing you to control your web games using console game controllers. it features a case study game — hungry fridge, created by enclave games. controls for web games historically playing games on a console connected to your tv was always a totally different experience to gaming on the pc, mostly because of the unique controls. eventually, extra drivers and plugins allowed us to use console gamepads with desktop games — either native games or those running in the browser. now in the era of html5, we finally have the gamepad api, which gives us the ability to play browser-based games using gamepad controllers without any plugins. the gamepad api achieves this by providing an in...
...the hungry fridge by tapping the healthy food (apples, carrots, lettuces) and avoid the "bad" food (beer, burgers, pizza.) a countdown changes the type of food the fridge wants to eat every few seconds, so you have to be careful and act quickly. the second, hidden "change" implementation is the ability to transform the static fridge into a full-blown moving, shooting and eating machine. when you connect the controller, the game significantly changes (hungry fridge turns into the super turbo hungry fridge) and you're able to control the armored fridge using the gamepad api. you have to shoot down the food, but once again you also have to find the type of food the fridge wants to eat at each point, or else you'll lose energy. the game encapsulates two totally different types of "change" — good ...
... into the code and study exactly how it works. the code explained below is from the full version of the hungry fridge game, but it's almost identical to the one from the demo — the only difference is that the full version uses the turbo variable to decide whether or not the game will be launched using super turbo mode. it works independently, so it could be turned on even if the gamepad is not connected. note: easter egg time: there's a hidden option to launch super turbo hungry fridge on the desktop without having a gamepad connected — click the gamepad icon in the top right corner of the screen. it will launch the game in the super turbo mode and you'll be able to control the fridge with the keyboard: a and d for turning the turret left and right, w for shooting and arrow keys for moveme...
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Storage
ocument covers the storage api and some peculiarities of sqlite. it does not cover sql or "regular" sqlite. you can find some very useful links in the see also section however. for storage api help, you can post to mozilla.dev.apps.platform on the news server news.mozilla.org. to report bugs, use bugzilla. the overall procedure for use is: get the storage service - mozistorageservice. ...
...f sqlite. it does not cover sql or "regular" sqlite. you can find some very useful links in the see also section however. for storage api help, you can post to mozilla.dev.apps.platform on the news server news.mozilla.org. to report bugs, use bugzilla. the overall procedure for use is: get the storage service - mozistorageservice. open a connection to the database of your choice - mozistorageconnection. ...
...te. you can find some very useful links in the see also section however. for storage api help, you can post to mozilla.dev.apps.platform on the news server news.mozilla.org. to report bugs, use bugzilla. the overall procedure for use is: get the storage service - mozistorageservice. open a connection to the database of your choice - mozistorageconnection. create statements to execute on the connection - mozistoragestatement. bind parameters to a statement as necessary. execute the statement. ...
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Index
r to granting validity to the certificate. in order to distinguish an ev certificate, cas will embed a policy oid in the certificate, and the browser is expected to verify that a trust chain permits the end entity (ee) certificate to make use of the policy. only the apis of the newer libpkix engine are capable of performing a policy verification. ...
...rtificate to make use of the policy. only the apis of the newer libpkix engine are capable of performing a policy verification. that's a good opportunity to talk about ssl/tls connections to servers in general (not just ev, not just websites). whenever this document mentions ssl, it refers to either ssl or tls. (tls is a newer version of ssl with enhanced features.) when establishing an ssl connection to a server, (at least) a server certificate (and its trust chain) is exchanged from the server to the client (e.g., the browser), and the client verifies that the certificate can be verified (including matching the name of the expected destination server). another part of the handshake between both parties is a key exchange. because public key encryption is more expensive (more calculations r...
...than symmetric encryption (where both parties use the same key), a key agreement protocol will be executed, where the public and private keys are used to proof and verify the exchanged initial information. once the key agreement is done, a symmetric encryption will be used (until a potential re-handshake on an existing channel). the combination of the hash and encryption algorithms used for a ssl connection is called a cipher suite. nss ships with a set of cipher suites that it supports at a technical level. in addition, nss ships with a default policy that defines which cipher suites are enabled by default. an application is able to modify the policy used at program runtime, by using function calls to modify the set of enabled cipher suites. if a programmer wants to influence how nss verif...
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nsIDOMWindowUtils
key inputting. this state is the same as ime-mode: password. ime_status_plugin 3 plug-in has focus. at this time we should not attempt to set the ime state. composition_attr_rawinput 0x02 synthesize a text event to the window. cannot be accessed from unprivileged context (not content-accessible) will throw a dom security error if called without universalxpconnect privileges. currently, this method doesn't support 4 or more clauses composition string. obsolete since gecko 38.0 composition_attr_selectedrawtext 0x03 obsolete since gecko 38.0 composition_attr_convertedtext 0x04 obsolete since gecko 38.0 composition_attr_selectedconvertedtext 0x05 obsolete since gecko 38.0 query_content_flag_use_nat...
...e css2 specification for details. author_sheet 2 a possible type of a style sheet loaded/removed with loadsheet()/removesheet(). see css2 specification for details. methods activatenativemenuitemat() see nsiwidget.activatenativemenuitemat(). cannot be accessed from unprivileged context (not content-accessible) will throw a dom security error if called without universalxpconnect privileges. void activatenativemenuitemat( in astring indexstring ); parameters indexstring clearmozafterpaintevents() void clearmozafterpaintevents(); parameters none. comparecanvases() compare the two canvases, returning the number of differing pixels and the maximum difference in a channel. this will throw an error if the dimensions of the two canvases are different. this m...
...enativemenuitemat( in astring indexstring ); parameters indexstring clearmozafterpaintevents() void clearmozafterpaintevents(); parameters none. comparecanvases() compare the two canvases, returning the number of differing pixels and the maximum difference in a channel. this will throw an error if the dimensions of the two canvases are different. this method requires universalxpconnect privileges. pruint32 comparecanvases( in nsidomhtmlcanvaselement acanvas1, in nsidomhtmlcanvaselement acanvas2, out unsigned long amaxdifference ); parameters acanvas1 acanvas2 amaxdifference return value computeanimationdistance() method for testing nsstyleanimation::computedistance. returns the distance between the two values as reported by nsstyleanimation::comput...
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nsIXPCScriptable
note: this is not really an xpcom interface. for example, callers must guarantee that they set the *_retval of the various methods that return a boolean to pr_true before making the call. implementations may skip writing to *_retval unless they want to return pr_false. js/src/xpconnect/idl/nsixpcscriptable.idlnot scriptable please add a summary to this article. ...
... unless they want to return pr_false. js/src/xpconnect/idl/nsixpcscriptable.idlnot scriptable please add a summary to this article. ...
...please add a summary to this article. ...
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Index - Archive of obsolete content
this tutorial focuses on extensions for firefox, but the same (or very similar) principles apply to creating extens...
...n, configuration management, enterprise no summary! 373 protecting mozilla's registry.dat file administration, configuration management, enterprise no summary! 374 automatically handle failed asserts in debug builds as of 2004-12-8, it is now possible to automatically handle failed asserts in debug builds of mozilla for windows. 375 blackconnect java no summary! 376 blackwood java no summary! 377 bonsai developing mozilla, tools it is a tool that lets you perform queries on the contents of a cvs archive; you can: get a list of checkins, see what checkins have been made by a given person, or on a given cvs branch, or in a particular time period. it also includes tools for looking at chec...
...data administration, enterprise this page will explain how to create a .rdf or .xml file that you can place in the $installfolder/default/isp to do a variety of things. this page applies to thunderbird (mail/news). 491 java in firefox extensions add-ons, extensions, java if you are in need of calling java code from within a firefox extension, you can make use of liveconnect. ...
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Sqlite.jsm
onous. use of synchronous storage apis is discouraged because they block the main thread. all the functionality in sqlite.jsm is asynchronous. easier memory management. since sqlite.jsm manages statements for you, it can perform intelligent actions like purging all cached statements not in use, freeing memory in the process. there is even a shrinkmemory api that will minimize memory usage of the connection automatically. simpler transactions. sqlite.jsm exposes a transaction api built on top of task.jsm that allows transactions to be written as procedural javascript functions (as opposed to a series of callback driven operations). if the function throws, the transaction is automatically rolled back. this makes code easy to write and read. javascript-y api. sqlite.jsm feels like a pure javascri...
...omplexities of xpcom are mostly hidden from view. javascript programmers should feel right at home using sqlite.jsm. note: the sqlite.jsm javascript code module can only be used from chrome -- that is, from within the application itself or an add-on. before you can use this module, you need to import it into your scope: components.utils.import("resource://gre/modules/sqlite.jsm") obtaining a connection sqlite.jsm exports the sqlite symbol. this symbol is an object with a single function: openconnection. this function takes an object defining connection options: path (required) the database file to open. this can be an absolute or relative path. if a relative path is given, it is interpreted as relative to the current profile's directory. if the path does not exist, a new sqlite database...
...kes an object defining connection options: path (required) the database file to open. this can be an absolute or relative path. if a relative path is given, it is interpreted as relative to the current profile's directory. if the path does not exist, a new sqlite database will be created. the value typically ends with .sqlite. sharedmemorycache (optional) boolean indicating whether multiple connections to the database share the same memory cache. sharing the memory cache likely results in less memory utilization. however, sharing also requires connections to obtain a lock, possibly making database access slower. defaults to true. shrinkmemoryonconnectionidlems (optional) if defined, the connection will attempt to minimize its memory usage after this many milliseconds of connection idle. t...
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Advanced techniques: Creating and sequencing audio - Web APIs
ble.js), because there are so many values. it is taken from a repository of wavetables, which can be found in the web audio api examples from google chrome labs. the oscillator now we can create an oscillatornode and set its wave to the one we've created: function playsweep() { let osc = audioctx.createoscillator(); osc.setperiodicwave(wave); osc.frequency.value = 440; osc.connect(audioctx.destination); osc.start(); osc.stop(audioctx.currenttime + 1); } controlling amplitude this is great, but wouldn't it be nice if we had an amplitude envelope to go with it? let's create a simple one so we get used to the methods we need to create an envelope with the web audio api. let's say our envelope has attack and release. we can allow the user to control these using ra...
...ck'); attackcontrol.addeventlistener('input', function() { attacktime = number(this.value); }, false); let releasetime = 0.5; const releasecontrol = document.queryselector('#release'); releasecontrol.addeventlistener('input', function() { releasetime = number(this.value); }, false); the final playsweep() function now we can expand our playsweep() function. we need to add a gainnode and connect that through our audio graph to actually apply amplitude variations to our sound. the gain node has one property: gain, which is of type audioparam. this is really useful — now we can start to harness the power of the audio param methods on the gain value. we can set a value at a certain time, or we can change it over time with methods such as audioparam.linearramptovalueattime. for our attac...
...all you really need to know is that it returns the time we are at right now. the "pulse" — low frequency oscillator modulation great, now we've got our sweep! let'...
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RTCDtlsTransport - Web APIs
features of the dtls transport include the addition of security to the underlying transport; the rtcdtlstransport interface can be used to obtain information about the underlying transport and the security added to it by the dtls layer. ...
... features of the dtls transport include the addition of security to the underlying transport; the rtcdtlstransport interface can be used to obtain information about the underlying transport and the security added to it by the dtls layer. ...
... information which describes a datagram transport layer security (dtls) transport state.methodsthis interface has no methods. description allocation of dtls transports rtcdtlstransport objects are created when an app calls either setlocaldescription() or setremotedescription(). the number of dtls transports created and how they're used depends on the bundling mode used when creating the rtcpeerconnection. whether bundling is used depends on what the other endpoint is able to negotiate. all browsers support bundling, so when both endpoints are browsers, you can rest assured that bundling will be used. some non-browser legacy endpoints, however, may not support bundle. to be able to negotiate with such endpoints (or to exclude them entirely), the rtcconfiguration property bundlepolicy may be p...
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Codecs used by WebRTC - Web media technologies
vp8 — chrome, edge, firefox, safari (12.1+) avc / h.264 constrained baseline (cb) chrome (52+), edge, firefox[1], safari [1] firefox for android 68 and later do not support avc (h.264) anymore. this is due to a change in google play store requirements that prevent firefox from downloading and installing the openh264 codec needed to handle h.264 in webrtc connections. see this article on sumo for details. for details on webrtc-related considerations for each codec, see the sub-sections below by following the links on each codec's name. complete details of what video codecs and configurations webrtc is required to support can be found in rfc 7742: webrtc video processing and codec requirements. it's worth noting that the rfc covers a variety of video-rel...
...nal codecs as well. those are listed in the following table. other video codecs codec name profile(s) browser compatibility vp9 — chrome (48+), firefox vp8 vp8, which we describe in general in the main guide to video codecs used on the web, has some specific requirements that must be followed when using it to encode or decode a video track on a webrtc connection. unless signaled otherwise, vp8 will use square pixels (that is, pixels with an aspect ratio of 1:1). other notes the network payload format for sharing vp8 using rtp (such as when using webrtc) is described in rfc 7741: rtp payload format for vp8 video. avc / h.264 support for avc's constrained baseline (cb) profile is required in all fully-compliant webrtc implementations. cb is a subse...
...self is not required to be specified. sprop-parameter-sets sequence and picture information for avc can be sent either in-band or out-of-band. when avc is used with webrtc, this information must be signaled in-band; the sprop-parameter-sets parameter must therefore not be included in the sdp. parameters which must be specified these parameters must be specified whenever using avc in a webrtc connection. profile-level-id all webrtc implementations are required to specify and interpret this parameter in their sdp, identifying the sub-profile used by the codec. the specific value that is set is not defined; what matters is that the parameter be used at all. this is useful to note, since in rfc 6184 ("rtp payload format for h.264 video"), profile-level-id is entirely optional. other requir...
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Desktop gamepad controls - Game development
an api exposes all the information you need to hook up your game's logic and successfully control the user interface and gameplay. ...
...und 63% global coverage, according to caniuse.com. the list of supported devices is also quite extensive — most popular gamepads (e.g. xbox 360 or ps3) should be suitable for web implementations. pure javascript approach let's think about implementing pure javascript gamepad controls in our little controls demo first to see how it would work. ...
...supported devices is also quite extensive — most popular gamepads (e.g. xbox 360 or ps3) should be suitable for web implementations. pure javascript approach let's think about implementing pure javascript gamepad controls in our little controls demo first to see how it would work. ...
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WebRTC Statistics API - Web APIs
the webrtc api has a vast array of statistics available, covering the entire breadth of the webrtc connectivity system, from sender to receiver and peer to peer. collecting statistics you can collect statistics at various levels throughout the webrtc hierarchy of objects. most broadly, you can call getstats() on an rtcpeerconnection to get statistics for the connection overall. in this example, a new rtcpeerconnection is created, and then setinterval() is used to set the function getconnectionstats() to be called every second. that function, in turn, uses getstats() to obtain statistics for the connection and to make use of that data. ...
...y of objects. most broadly, you can call getstats() on an rtcpeerconnection to get statistics for the connection overall. in this example, a new rtcpeerconnection is created, and then setinterval() is used to set the function getconnectionstats() to be called every second. that function, in turn, uses getstats() to obtain statistics for the connection and to make use of that data. ...
...ly, you can call getstats() on an rtcpeerconnection to get statistics for the connection overall. in this example, a new rtcpeerconnection is created, and then setinterval() is used to set the function getconnectionstats() to be called every second. that function, in turn, uses getstats() to obtain statistics for the connection and to make use of that data. ...
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HTTP Index - HTTP
1 http http, hypertext, reference, tcp/ip, web, web development, l10n:priority hypertext transfer protocol (http) is an application-layer protocol for transmitting hypermedia documents, such as html. it was designed for communication between web browsers and web servers, but it can also be used for other purposes. http follows a classical client-server model, with a client opening a connection to make a request, then waiting until it receives a response. http is a stateless protocol, meaning that the server does not keep any data (state) between two requests. though often based on a tcp/ip layer, it can be used on any reliable transport layer, that is, a protocol that doesn't lose messages silently like udp does. rudp — the reliable update of udp — is a suitable alternative. ...
...e, text, types, video here is a list of mime types, associated by type of documents, ordered by their common extensions. 11 resource urls guide, http, intermediate, resource resource urls, urls prefixed with the resource: scheme, are used by firefox and firefox browser extensions to load resources internally, but some of the information is available to sites the browser connects to as well. 12 browser detection using the user agent compatibility, http, web development serving different web pages or services to different browsers is usually a bad idea. the web is meant to be accessible to everyone, regardless of which browser or device they're using. there are ways to develop your website to progressively enhance itself based on the availability of f...
...ze reduction of up to 70% lowers the bandwidth capacity needs. over the years, algorithms also got more efficient, and new ones are supported by clients and servers. 14 configuring servers for ogg media audio, http, media, ogg, video this guide covers a few server configuration changes that may be necessary for your web server to correctly serve ogg media files. 15 connection management in http/1.x connection management, guide, http, networking, performance, webmechanics connection management is a key topic in http: opening and maintaining connections largely impacts the performance of web sites and web applications. in http/1.x, there are several models: short-lived connections, persistent connections, and http pipelining. 16 content security...
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Navigation and resource timings - Web Performance
been replaced with the performancenavigationtiming api. the performance timing api provided read only times, in milliseconds(ms), describing at what time each point in the page loading process was reached. as displayed in the image below, the navigation process goes from navigationstart, unloadeventstart, unloadeventend, redirectstart, redirectend, fetchstart, domainlookupstart, domainlookupend, connectstart , connectend, secureconnectionstart, requeststart, responsestart, responseend, domloading, dominteractive, domcontentloadedeventstart, domcontentloadedeventend, domcomplete, loadeventstart, and loadeventend. with the metrics above, and a little bit of math, we can calculate many important metrics like time to first byte, page load time, dns lookup, and whether the connection is secure. t...
...t time = window.performance.timing we can then use the results to measure how well our app is performing. the order is: performance timings details navigationstart when the prompt for unload terminates on the previous document in the same browsing context. if there is no previous document, this value will be the same as performancetiming.fetchstart. secureconnectionstart when the secure connection handshake starts. if no such connection is requested, it returns 0. redirectstart when the first http redirect starts. if there is no redirect, or if one of the redirects is not of the same origin, the value returned is 0. redirectend when the last http redirect is completed, that is when the last byte of the http response has bee...
... when the first http redirect starts. if there is no redirect, or if one of the redirects is not of the same origin, the value returned is 0. redirectend when the last http redirect is completed, that is when the last byte of the http response has been received. if there is no redirect, or if one of the redirects is not of the same origin, the value returned is 0. ...
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RTCConfiguration - Web APIs
the options include ice server and transport settings and identity information. properties bundlepolicy optional specifies how to handle negotiation of candidates when the remote peer is not compatible with the sdp bundle standard. this must be one of the values from the enum rtcbundlepolicy. ...
... the options include ice server and transport settings and identity information. properties bundlepolicy optional specifies how to handle negotiation of candidates when the remote peer is not compatible with the sdp bundle standard. this must be one of the values from the enum rtcbundlepolicy. ...
...dentity information. properties bundlepolicy optional specifies how to handle negotiation of candidates when the remote peer is not compatible with the sdp bundle standard. this must be one of the values from the enum rtcbundlepolicy. if this value isn't included in the dictionary, "balanced" is assumed. certificates optional an array of objects of type rtccertificate which are used by the connection for authentication. if this property isn't specified, a set of certificates is generated automatically for each rtcpeerconnection instance. although only one certificate is used by a given connection, providing certificates for multiple algorithms may improve the odds of successfully connecting in some circumstances. see using certificates below for additional information. this configuration ...
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Lifetime of a WebRTC session - Web APIs
webrtc lets you build peer-to-peer communication of arbitrary data, audio, or video—or any combination thereof—into a browser application. in this article, we'll look at the lifetime of a webrtc session, from establishing the connection all the way through closing the connection when it's no longer needed. this article doesn't get into details of the actual apis involved in establishing and handling a webrtc connection; it simply reviews the process in general with some information about why each step is required. see signaling and video calling for an actual example with a step-by-step explanation of what the code does. this page is currently under construction, and some of the content will move to other pages as the webrtc guide material is built out. pardon our dust! establishing...
...really big. it’s so big that years ago, smart people saw how big it was, how fast it was growing, and the limitations of the 32-bit ip addressing system, and realized that something had to be done before we ran out of addresses to use, so they started working on designing a new 64-bit addressing system. ...
...necessarily has a unique ip address, and, in fact, each device’s ip address may change not only if they move from one network to another, but if their network’s address is changed by nat and/or dhcp. for developers trying to do peer-to-peer networking, this introduces a conundrum: without a unique identifier for every user device, it’s not possible to instantly and automatically know how to connect to a specific device on the internet. even though you know who you want to talk to, you don’t necessarily know how to reach them or even what their address is. this is like trying to mail a package to your friend michelle by labeling it “michelle” and dropping it in a mailbox when you don't know her address. you need to look up her address and include it on the package, or she'll wind up w...
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Autodial for Windows NT - Archive of obsolete content
as last updated in 2002. introduction this document is intended to explain how the autodial helper feature implemented for bug 93002 works and why it works that way. a brief history of autodial on windows in the consumer versions of windows, (windows 95, windows 98, windows me) autodial for all applications is controlled from the control panel, in the internet options applet, under the tab connections. if you turn on the autodial feature, windows will automatically dial whenever any application tries to access a network address that can't be reached. technically, this control panel applet (internet options) is part of internet explorer. it is not present in early versions of windows until internet explorer is installed. despite this fact, the feature is triggered by any application that us...
...orking. starting with windows nt, and in all nt-based versions (windows nt, windows 2000, and windows xp, including xp home) microsoft has changed the behavior of autodial. for these oss, the autodial options found in the internet options control panel applet only apply to microsoft applications, including internet explorer and outlook. microsoft added a windows system service (remote access auto connection) to handle autodial for all other applications. if this service is running, and control panel | network connections | advanced | dialup preferences is set to enable autodial, then any application trying to access the internet will trigger the autodial feature whenever an internet address cannot be reached. however, this service will won't function if you have a lan card installed, unless that ...
...rvice is running, and control panel | network connections | advanced | dialup preferences is set to enable autodial, then any application trying to access the internet will trigger the autodial feature whenever an internet address cannot be reached. however, this service will won't function if you have a lan card installed, unless that particular address has been accessed in the past via a dialup connection. origin of the bug before the implementation of the autodial helper feature, mozilla would trigger the autodial feature on nt-based operating systems, but only if certain conditions are met. ...
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Introduction to SSL - Archive of obsolete content
displaying web pages or running email servers. the ssl protocol runs above tcp/ip and below higher-level protocols such as http or imap. it uses tcp/ip on behalf of the higher-level protocols, and in the process allows an ssl-enabled server to authenticate itself to an ssl-enabled client, allows the client to authenticate itself to the server, and allows both machines to establish an encrypted connection. these capabilities address fundamental concerns about communication over the internet and other tcp/ip networks: ssl server authentication allows a user to confirm a server's identity. ssl-enabled client software can use standard techniques of public-key cryptography to check that a server's certificate and public id are valid and have been issued by a certificate authority (ca) listed in...
...r authentication, ssl-enabled server software can check that a client's certificate and public id are valid and have been issued by a certificate authority (ca) listed in the server's list of trusted cas. this confirmation might be important if the server, for example, is a bank sending confidential financial information to a customer and wants to check the recipient's identity. ...
... the ssl protocol includes two sub-protocols: the ssl record protocol and the ssl handshake protocol. the ssl record protocol defines the format used to transmit data. ...
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mozIStorageService
storage/public/mozistorageservice.idlscriptable this interface lets you open a mozistorageconnection to a database file, as well as create backups of an unopened database file. this is the only way to open a database connection. ...
... storage/public/mozistorageservice.idlscriptable this interface lets you open a mozistorageconnection to a database file, as well as create backups of an unopened database file. this is the only way to open a database connection. ...
...ned database file. this is the only way to open a database connection. 1.0 66 introduced gecko 1.8 inherits from: nsisupports last changed in gecko 1.9 (firefox 3) see mozistorageconnection method overview nsifile backupdatabasefile(in nsifile adbfile, in astring abackupfilename, [optional] in nsifile abackupparentdirectory); mozistorageconnection opendatabase(in nsifile adatabasefile); mozistorageconnection openspecialdatabase(in string astoragekey); mozistorageconnection openunshareddatabase(in nsifile adatabasefile); methods backupdatabasefile() this method makes a backup of the specified file. the database should not be open, or you should ensure that no database activity is happening when y...
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nsISocketTransport
netwerk/base/public/nsisockettransport.idlscriptable this interface specializes nsitransport for communication over network sockets. it provides methods to open blocking or non-blocking, buffered or unbuffered streams between two end-point in a ip based network. inherits from: nsitransport last changed in gecko 6.0 (firefox 6.0 / thunderbird 6.0 / seamonkey 2.3) note: connection setup is triggered by opening an input or output stream, it does not start on its own. completion of the connection setup is indicated by a status_connected_to notification to the event sink (if set). to create an instance, call nsisockettransportservice.createtransport() method overview prnetaddr getpeeraddr(); native code only! prnetaddr getselfaddr(); native code only! ...
...read only. securityca...
... code only! unsigned long gettimeout(in unsigned long atype); boolean isalive(); void settimeout(in unsigned long atype, in unsigned long avalue); attributes attribute type description connectionflags unsigned long a bitmask that can be used to modify underlying behavior of the socket connection. see connection flag constants for more details. host autf8string get the host for the underlying socket connection. read only. port long get the port for the underlying socket connection. read only. securitycallbacks nsiinterfacerequestor security notification callbacks passed to the secure socket pr...
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NSS Tools ssltap
using the ssl debugging tool (ssltap) newsgroup: mozilla.dev.tech.crypto the ssl debugging tool is an ssl-aware command-line proxy. it watches tcp connections and displays the data going by. if a connection is ssl, the data display includes interpreted ssl records and handshaking. availability this tool is known to build on solaris 2.5.1 (sunos 5.5.1) and windows nt 4.0. description the ssltap command opens a socket on a rendezvous port and waits for an incoming connection from the client side. once this connection arrives, the tool makes another connection to the specified host name and port on the server side. it passes any data sent by the client to the server and vice versa. the tool also displays the data to the shell window from which it was called. it can do this for...
... command opens a socket on a rendezvous port and waits for an incoming connection from the client side. once this connection arrives, the tool makes another connection to the specified host name and port on the server side. it passes any data sent by the client to the server and vice versa. the tool also displays the data to the shell window from which it was called. it can do this for plain http connections or any tcp protocol, as well as for ssl streams, as described here. the tool cannot and does not decrypt any encrypted message data. you use the tool to look at the plain text and binary data that are part of the handshake procedure, before the secure connection is established. syntax to run the ssl debugging tool, type this command in a command shell: ssltap [-vhfsxl] [-p port] host...
...the options for the command are the following: -v print a version string for the tool. -h turn on hex/ascii printing. ...
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NSS tools : ssltap
-h turn on hex/ascii printing. instead of outputting raw data, the command interprets each record as a numbered line of hex values, followed by the same data as ascii characters. the two parts are separated by a vertical bar. ...
... -h turn on hex/ascii printing. instead of outputting raw data, the command interprets each record as a numbered line of hex values, followed by the same data as ascii characters. the two parts are separated by a vertical bar. ...
...s, followed by the same data as ascii characters. the two parts are separated by a vertical bar. nonprinting characters are replaced by dots. -f turn on fancy printing. output is printed in colored html. data sent from the client to the server is in blue; the server's reply is in red. when used with looping mode, the different connections are separated with horizontal lines. you can use this option to upload the output into a browser. -s turn on ssl parsing and decoding. the tool does not automatically detect ssl sessions. if you are intercepting an ssl connection, use this option so that the tool can detect and decode ssl structures. if the too...
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RTCIceCandidatePairStats - Web APIs
if a rtcstats-based object's type is candidate-pair, it's an rtcicecandidatepairstats object. properties rtcicecandidatepairstats is based upon rtcstats and inherits its properties. ...
...air so far. bytessent optional the total number of payload bytes sent (that is, the total number of bytes sent minus any headers, padding, or other administrative overhead) so far on this candidate pair. circuitbreakertriggercount optional an integer value indicating the number of times the circuit-breaker has been triggered for this particular 5-tuple (the set of five values comprising a tcp connection: source ip address, source port number, destination ip address, destination port number, and protocol). the circuit breaker is triggered whenever a connection times out or otherwise needs to be automatically aborted. consentexpiredtimestamp optional a domhighrestimestamp value indicating the time at which the most recent stun binding response expired. this value is undefined if no valid stun...
...d is 0. consentrequestssent optional the total number of consent requests that have been sent on this candidate pair. currentroundtriptime optional a floating-point value indicating the total time, in seconds, that elapsed elapsed between the most recently-sent stun request and the response being received. this may be based upon requests that were involved in confirming permission to open the connection. firstrequesttimestamp optional a domhighrestimestamp value which specifies the time at which the first stun request was sent from the local peer to the remote peer for this candidate pair. lastpacketreceivedtimestamp optional a domhighrestimestamp value indicating the time at which the last packet was received by the local peer from the remote peer for this candidate pair. timestamps are ...
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Controlling multiple parameters with ConstantSourceNode - Web APIs
is optimized for this kind of work and may run at a more appropriate priority level than your code. the solution is simple, and it involves using an audio node type which, at first glance, doesn't look all that useful: constantsourcenode. the technique this is actually a really easy way to do something that sounds like it might be hard to do. you simply need to create a constantsourcenode and connect it to all of the audioparams whose values should be linked to always match each other. since constantsourcenode's offset value is simply sent straight through to all of its outputs, it acts as a splitter for that value, sending it to each connected parameter. the diagram below shows how this works; an input value, n, is set as the value of the constantsourcenode.offset property. the constantsour...
...so n becomes the value of the specified parameter (gain for the gainnodes and pan for the stereopannernode. ...
...then we get references to the control widgets, settin...
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An overview of HTTP - HTTP
unicate by exchanging individual messages (as opposed to a stream of data). the messages sent by the client, usually a web browser, are called requests and the messages sent by the server as an answer are called responses. designed in the early 1990s, http is an extensible protocol which has evolved over time. it is an application layer protocol that is sent over tcp, or over a tls-encrypted tcp connection, though any reliable transport protocol could theoretically be used. due to its extensibility, it is used to not only fetch hypertext documents, but also images and videos or to post content to servers, like with html form results. http can also be used to fetch parts of documents to update web pages on demand. components of http-based systems http is a client-server protocol: requests are s...
...exity for newcomers. http is extensible introduced in http/1.0, http headers make this protocol easy to extend and experiment with. new functionality can even be introduced by a simple agreement between a client and a server about a new header's semantics. http is stateless, but not sessionless http is stateless: there is no link between two requests being successively carried out on the same connection. this immediately has the prospect of being problematic for users attempting to interact with certain pages coherently, for example, using e-commerce shopping baskets. but while the core of http itself is stateless, http cookies allow the use of stateful sessions. using header extensibility, http cookies are added to the workflow, allowing session creation on each http request to share the sam...
...f being problematic for users attempting to interact with certain pages coherently, for example, using e-commerce shopping baskets. but while the core of http itself is stateless, http cookies allow the use of stateful sessions. using header extensibility, http cookies are added to the workflow, allowing session creation on each http request to share the same context, or the same state. http and connections a connection is controlled at the transport layer, and therefore fundamentally out of scope for http. though http doesn't require the underlying transport protocol to be connection-based; only requiring it to be reliable, or not lose messages (so at minimum presenting an error). among the two most common transport protocols on the internet, tcp is reliable and udp isn't. http therefore relie...
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Protocol upgrade mechanism - HTTP
the http/1.1 protocol provides a special mechanism that can be used to upgrade an already established connection to a different protocol, using the upgrade header field. this mechanism is optional; it cannot be used to insist on a protocol change. implementations can choose not to take advantage of an upgrade even if they support the new protocol, and in practice, this mechanism is used mostly to bootstrap a websockets connection. note also that http/2 explicitly disallows the use of this mechanism; it is specific to http/1.1. ...
... header field. this mechanism is optional; it cannot be used to insist on a protocol change. implementations can choose not to take advantage of an upgrade even if they support the new protocol, and in practice, this mechanism is used mostly to bootstrap a websockets connection. note also that http/2 explicitly disallows the use of this mechanism; it is specific to http/1.1. ...
... is used mostly to bootstrap a websockets connection. note also that http/2 explicitly disallows the use of this mechanism; it is specific to http/1.1. upgrading http/1.1 connections the upgrade header field is used by clients to invite the server to switch to one of the listed protocols, in descending preference order. because upgrade is a hop-by-hop header, it also needs to be listed in the connection header field. ...
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about:debugging - Firefox Developer Tools
d-ons, tabs, and workers. opening the about:debugging page there are two ways to open about:debugging: type about:debugging in the firefox url bar. in the tools > web developer menu, click remote debugging. when about:debugging opens, on the left-hand side, you'll see a sidebar with two options and information about your remote debugging setup: setup use the setup tab to configure the connection to your remote device. this firefox provides information about temporary extensions you have loaded for debugging, extensions that are installed in firefox, the tabs that you currently have open, and service workers running on firefox. if your about:debugging page is different from the one displayed here, go to about:config, find and set the option devtools.aboutdebugging.new-enabled to ...
... device. this firefox provides information about temporary extensions you have loaded for debugging, extensions that are installed in firefox, the tabs that you currently have open, and service workers running on firefox. if your about:debugging page is different from the one displayed here, go to about:config, find and set the option devtools.aboutdebugging.new-enabled to true. ...
...in firefox, the tabs that you currently have open, and service workers running on firefox. if your about:debugging page is different from the one displayed here, go to about:config, find and set the option devtools.aboutdebugging.new-enabled to true. setup tab connecting to a remote device firefox supports debugging over usb with android devices, using the about:debugging page. before you connect: enable developer settings on your android device. enable usb debugging in the android developer settings. enable remote debugging via usb in the advanced settings in firefox on the android device. connect the android device to your computer using a usb cable. if your device doesn't appear in the lefthand side of the about:debugging page, try clicking the refresh devices button. if it st...
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Applying styles and colors - Web APIs
with half-pixel coordinates for odd-width lines, by setting the linecap style to square, so that the outer border of the stroke around the endpoint will be automatically extended to cover the whole pixel exactly). note also that only start and final endpoints of a path are affected: if a path is closed with closepath(), there's no start and final endpoint; instead, all endpoints in the path are connected to their attached previous and next segment using the current setting of the linejoin style, whose default value is miter, with the effect of automatically extending the outer borders of the connected segments to their intersection point, so that the rendered stroke will exactly cover full pixels centered at each endpoint if those connected segments are horizontal and/or vertical). see the next...
... there are three possible values for this property: round, bevel and miter. by default this property is set to miter. note that the linejoin setting has no effect if the two ...
...ing segments (of lines, arcs or curves) with non-zero lengths in a shape are joined together (degenerate segments with zero lengths, whose specified endpoints and control points are exactly at the same position, are skipped). there are three possible values for this property: round, bevel and miter. by default this property is set to miter. ...
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Writing WebSocket client applications - Web APIs
sing the websocket protocol. note: this feature is available in web workers. note: the example snippets in this article are taken from our websocket chat client/server sample. see the code, then try out the example for yourself. creating a websocket object in order to communicate using the websocket protocol, you need to create a websocket object; this will automatically attempt to open the connection to the server. the websocket constructor accepts one required and one optional parameter: websocket = new websocket(url, protocols); url the url to which to connect; this should be the url to which the websocket server will respond. this should use the url scheme wss://, although some software may allow you to use the insecure ws:// for local connections. protocols optional either a s...
...t a single server can implement multiple websocket sub-protocols (for example, you might want one server to be able to handle different types of interactions depending on the specified protocol). if you don't specify a protocol string, an empty string is assumed. the constructor will throw a securityerror if the destination doesn't allow access. ...
...mple, you might want one server to be able to handle different types of interactions depending on the specified protocol). if you don't specify a protocol string, an empty string is assumed. the constructor will throw a securityerror if the destination doesn't allow access. this may happen if you attempt to use an insecure connection (most user agents now require a secure link for all websocket connections unless they're on the same device or possibly on the same network). ...
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Writing a WebSocket server in C# - Web APIs
introduction if you would like to use the websocket api, it is useful if you have a server. in this article i will show you how to write one in c#. you can do it in any server-side language, but to keep things simple and more understandable, i chose microsoft's language. this server conforms to rfc 6455 so it will only handle connections from chrome version 16, firefox 11, ie 10 and over. first steps websockets communicate over a tcp (transmission control protocol) connection. luckily, c# has a tcplistener class which does as the name suggests. it is in the system.net.sockets namespace. it is a good idea to include the namespace with the using keyword in order to write less. it allows usage of a namespace's classes without typing the full namespace every time. tcplistener constru...
...namespace's classes without typing the full namespace every time. tcplistener constructor: tcplistener(system.net.ipaddress localaddr, int port) localaddr specifies the ip of the listener, and port specifies the port. to create an ipaddress object from a string, use the parse static method of ipaddress. ...
...both sides of the channel have reading and writing capability. ...
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Writing WebSocket servers - Web APIs
d-balancing or other practical reasons), so you will often use a reverse proxy (such as a regular http server) to detect websocket handshakes, pre-process them, and send those clients to a real websocket server. this means that you don't have to bloat your server code with cookie and authentication handlers (for example). the websocket handshake first, the server must listen for incoming socket connections using a standard tcp socket. depending on your platform, this may be handled for you automatically. for example, let's assume that your server is listening on example.com, port 8000, and your socket server responds to get requests at example.com/chat. warning: the server may listen on any port it chooses, but if it chooses any port other than 80 or 443, it may have problems with firewalls a...
... platform, this may be handled for you automatically. for example, let's assume that your server is listening on example.com, port 8000, and your socket server responds to get requests at example.com/chat. warning: the server may listen on any port it chooses, but if it chooses any port other than 80 or 443, it may have problems with firewalls and/or proxies. browsers generally require a secure connection for websockets, although they may offer an exception for local devices. the handshake is the "web" in websockets. it's the bridge from http to websockets. in the handshake, details of the connection are negotiated, and either party can back out before completion if the terms are unfavorable. the server must be careful to understand everything the client asks for, otherwise security issues ca...
... the spec. so, many people use it to let one server handle multiple websocket applications. for example, example.com/chat could invoke a multiuser chat app, while /game on the same server might invoke a multiplayer game. ...
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Java in Firefox Extensions - Archive of obsolete content
note: the global java object has been removed in gecko 16.0, so this page is out of date. you should still be able to use the java plugin's scripting functionality, see liveconnect for the pointers. note bug 834918 about click-to-play effect on java plugins in chrome and bug 775301. if you are in need of calling java code from within a firefox extension, you can make use of liveconnect. ...
... note: the global java object has been removed in gecko 16.0, so this page is out of date. you should still be able to use the java plugin's scripting functionality, see liveconnect for the pointers. note bug 834918 about click-to-play effect on java plugins in chrome and bug 775301. if you are in need of calling java code from within a firefox extension, you can make use of liveconnect. ...
...nters. note bug 834918 about click-to-play effect on java plugins in chrome and bug 775301. if you are in need of calling java code from within a firefox extension, you can make use of liveconnect. liveconnect gives your extension's javascript code (linked from or contained in xul code) access to 2 objects: java and packages (note that per this thread, although the new documentation for the liveconnect reimplementation states that these globals will be deprecated (in the context of applets), "firefox and the java plug-in will continue to support the global java/packages keywords, in particular in the context of firefox extensions."). these 2 objects let you make use of the standard jdk classes, e.g., var ajavalist = new java.util.linkedlist(); if you want to load your own jars, then you can cr...
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JavaScript-DOM Prototypes in Mozilla
in the case where the c++ object has class info (nsiclassinfo), the jsobject is a more or less empty jsobject which is not really that special. ...
...in the case where the c++ object has class info (nsiclassinfo), the jsobject is a more or less empty jsobject which is not really that special. ...
...in the case where the c++ object has class info (nsiclassinfo), the jsobject is a more or less empty jsobject which is not really that special. ...
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NSS tools : ssltab
-h turn on hex/ascii printing. instead of outputting raw data, the command interprets each record as a numbered line of hex values, followed by the same data as ascii characters. the two parts are separated by a vertical bar. nonprinting characters are replaced by dots. -f turn on fancy printing. output is printed in colored html. ...
...ata, the command interprets each record as a numbered line of hex values, followed by the same data as ascii characters. the two parts are separated by a vertical bar. nonprinting characters are replaced by dots. -f turn on fancy printing. output is printed in colored html. data sent from the client to the server is in blue; the server's reply is in red. when used with looping mode, the different connections are separated with horizontal lines. you can use this option to upload the output into a browser. -s turn on ssl parsing and decoding. the tool does not automatically detect ssl sessions. if you are intercepting an ssl connection, use this option so that the tool can detect and decode ssl structures. if the tool detects a certificate chain, it saves the der-encoded certificates into files in ...
...x is the sequence number of the certificate. if the -s option is used with -h, two separate parts are printed for each record: the plain hex/ascii output, and the parsed ssl output. -x turn on hex/ascii printing of undecoded data inside parsed ssl records. used only with the -s option. this option uses the same output format as the -h option. -l prefix turn on looping; that is, continue to accept connections rather than stopping after the first connection is complete. -p port change the default rendezvous port (1924) to another port. the following are well-known port numbers: * http 80 * https 443 * smtp 25 * ftp 21 * imap 143 * imaps 993 (imap over ssl) * nntp 119 * nntps 563 (nntp over ssl) usage and examples you can use the ssl debugging tool to intercept any connection information. although y...
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NSS tools : ssltap
-h turn on hex/ascii printing. instead of outputting raw data, the command interprets each record as a numbered line of hex values, followed by the same data as ascii characters. the two parts are separated by a vertical bar. nonprinting characters are replaced by dots. -f turn on fancy printing. output is printed in colored html. ...
...ata, the command interprets each record as a numbered line of hex values, followed by the same data as ascii characters. the two parts are separated by a vertical bar. nonprinting characters are replaced by dots. -f turn on fancy printing. output is printed in colored html. data sent from the client to the server is in blue; the server's reply is in red. when used with looping mode, the different connections are separated with horizontal lines. you can use this option to upload the output into a browser. -s turn on ssl parsing and decoding. the tool does not automatically detect ssl sessions. if you are intercepting an ssl connection, use this option so that the tool can detect and decode ssl structures. if the tool detects a certificate chain, it saves the der-encoded certificates into files in ...
...x is the sequence number of the certificate. if the -s option is used with -h, two separate parts are printed for each record: the plain hex/ascii output, and the parsed ssl output. -x turn on hex/ascii printing of undecoded data inside parsed ssl records. used only with the -s option. this option uses the same output format as the -h option. -l prefix turn on looping; that is, continue to accept connections rather than stopping after the first connection is complete. -p port change the default rendezvous port (1924) to another port. the following are well-known port numbers: * http 80 * https 443 * smtp 25 * ftp 21 * imap 143 * imaps 993 (imap over ssl) * nntp 119 * nntps 563 (nntp over ssl) usage and examples you can use the ssl debugging tool to intercept any connection information. although y...
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Observer Notifications
to your observer, the data value is an nsisupportsprbool). quit-application-granted all observers have agreed to the shutdown. quit-application the application is about to quit. this can be in response to a normal shutdown, or a restart. note: the data value for this notification is either 'shutdown' or 'restart'. profile-change-net-teardown the network connection is going offline at this point. note: the data value for this notification is always 'shutdown-persist'. profile-change-teardown part of the shutdown, profile data is still available at this point. note: the data value for this notification is always 'shutdown-persist'. profile-before-change called just before the profile is lost. note: the data valu...
...nner and outer windows for details about how the window hierarchy works. extensions that cache information about windows may wish to observe this so they can release information when the window is destroyed. the window id can be obtained from subject.queryinterface(components.interfaces.nsisupportspruint64).data outer-window-destroyed nsidomwindow called when an outer window is disconnected from its docshell. see inner and outer windows for details about how the window hierarchy works. extensions that cache information about windows may wish to observe this so they can release information when the window is destroyed. the window id can be obtained from subject.queryinterface(components.interfaces.nsisupportspruint64).data toplevel-window-ready nsiwindowwatcher cal...
...line-status-changed called when the offline state has changed. note: the data value for this notification 'offline' or 'online' to indicate the new state. network:link-status-changed called when the network link status changes. http requests these are the topics that you can observe during a http request (see setting http request headers and creating sandboxed http connections). both are passed an nsihttpchannel as the subject parameter. topic description http-on-modify-request called as a http request is made. the channel is available to allow you to modify headers and such. see this code snippet to learn how to get the tab that issued the request. http-on-opening-request similar to http-on-modify-request, but called earlier (s...
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CloseEvent - Web APIs
this is delivered to the listener indicated by the websocket object's onclose attribute. constructor closeevent() creates a new closeevent. properties this interface also inherits properties from its parent, event. closeevent.code read only returns an unsigned short containing the close code sent by the server. the following values are permitted status codes. the following definitions are sourced from the iana website [ref]. note that the 1xxx codes are only websocket-internal and not for the same meaning by the transported data (like when the application-layer protocol is invalid). ...
...xx codes are only websocket-internal and not for the same meaning by the transported data (like when the application-layer protocol is invalid). the only permitted codes to be specified in firefox are 1000 and 3000 to 4999 [source, bug]. status code name description 0–999 reserved and not used. 1000 normal closure normal closure; the connection successfully completed whatever purpose for which it was created. 1001 going away the endpoint is going away, either because of a server failure or because the browser is navigating away from the page that opened the connection. 1002 protocol error the endpoint is terminating the connection due to a protocol error. 1003 unsupported data ...
...cessfully completed whatever purpose for which it was created. 1001 going away the endpoint is going away, either because of a server failure or because the browser is navigating away from the page that opened the connection. 1002 protocol error the endpoint is terminating the connection due to a protocol error. 1003 unsupported data the connection is being terminated because the endpoint received data of a type it cannot accept (for example, a text-only endpoint received binary data). 1004 reserved. a meaning might be defined in the future. 1005 no status received reserved. indicates that no status code was provided even though one was expected. 1006 abnormal closure reserved...
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Network Information API - Web APIs
the network information api provides information about the system's connection in terms of general connection type (e.g., 'wifi', 'cellular', etc.). this can be used to select high definition content or low definition content based on the user's connection. the entire api consists of the addition of the networkinformation interface and a single property to the navigator interface: navigator.connection. note: this feature is available in web workers. examples detect connection changes this example watches for changes to the user's connection. ...
... be used to select high definition content or low definition content based on the user's connection. the entire api consists of the addition of the networkinformation interface and a single property to the navigator interface: navigator.connection. note: this feature is available in web workers. examples detect connection changes this example watches for changes to the user's connection. ...
... definition content or low definition content based on the user's connection. the entire api consists of the addition of the networkinformation interface and a single property to the navigator interface: navigator.connection. note: this feature is available in web workers. examples detect connection changes this example watches for changes to the user's connection. ...
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Visual typescript game engine - Game development
ns. npm install npm run build navigate in browser /build/app.html to see client app in action -the client part is a browser web application. no reloading or redirecting. this is a single page application. i use html request only for loading local/staged html (like register, login etc.). networking is based on websocket full-duplex communication only.you must be conform with classic socket connection methodology. webrtc can be used for any proportion. already implemented: -video chat webrtc (sip) chat and data communication. look back on main staff : -class 'connector' (native websocket) used for user session staff. for main account session staff like login, register etc. client config if you want web app without any networking then setup: appusenetwork: boolean = false; you wan...
...3; /** * domain is simple url address, * recommendent to use for local propose lan ip * like : 192.168.0.xxx if you wanna run ant test app with server. */ private domain: string = "maximumroulette.com"; /** * networkdeeplogs control of dev logs for webrtc context only. ...
...server. */ private domain: string = "maximumroulette.com"; /** * networkdeeplogs control of dev logs for webrtc context only. */ private networkdeeplogs: boolean = false; /** * masterserverkey is channel access id used to connect * multimedia server channel. */ private masterserverkey: string = "multi-platformer-sever1.maximum"; /** * rtcserverport port used to connect multimedia server. * default value is 12034 */ private rtcserverport: number = 12034; /** * connectorport is access port used to connect * session web socket. */ private connectorport: number = 1234; /** * broadcasterport port used to connect multimedia server multirtc3. * i will use it for explicit video chat multiplatform support. * default value is 9001 */ ...
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Using XPCOM Components
to view, organize, or remove cookies that have been stored on the system, they are using the cookiemanager component behind the scenes. the cookie manager dialog shows user interface[cookie-manager-ui] that is presented to the user in mozilla for working with the cookiemanager component. the cookie manager dialog this dialog is written in xul and javascript, and uses a part of xpcom called xpconnect to seamlessly connect to the cookiemanager component (see connecting to components from the interface below). xul is just one way to expose the functionality of the cookiemanager component-but it's a particularly useful one in the mozilla world. the functionality of the cookiemanager component is available through the nsicookiemanager interface, which is comprised of the public methods in the ta...
...cookiemanager interface is called. the function is carried out by the cookiemanager component, and the selected cookie is deleted from disk and removed from the displayed list. ...
... .getservice(); cmgr = cmgr.queryinterface(components.interfaces.nsicookiemanager); // called as part of a largerdeleteallcookies() function function finalizecookiedeletions() { for (var c=0; c<deletedcookies.length; c++) { cmgr.remove(deletedcookies[c].host, deletedcookies[c].name, deletedcookies[c].path); } deletedcookies.length = 0; } connecting to components from the interface the mozilla user interface uses javascript that has been given access to xpcom components in the application core with a technology called xpconnect. xpconnect allows interface methods defined via xpidl to be called from javascript, as part of javascript objects that represent instances of components like the cookiemanager. xpconnect is what binds the applic...
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Use SQLite
table called attachments. you can see the schema for the attachments table in the code. to double check the information you've inserted you can query the tbird.sqlite file using regular sqlite programs. const cc = components.classes; const ci = components.interfaces; var tbirdsqlite = { onload: function() { // initialization code this.initialized = true; this.dbinit(); }, dbconnection: null, dbschema: { tables: { attachments:"id integer primary key, \ name text \ encoded text not null" } }, dbinit: function() { var dirservice = cc["@mozilla.org/file/directory_service;1"]. getservice(ci.nsiproperties); var dbfile = dirservice.get("profd", ci.nsifile); dbfile.append("tbir...
... text \ encoded text not null" } }, dbinit: function() { var dirservice = cc["@mozilla.org/file/directory_service;1"]. getservice(ci.nsiproperties); var dbfile = dirservice.get("profd", ci.nsifile); dbfile.append("tbird.sqlite"); var dbservice = cc["@mozilla.org/storage/service;1"]. ...
...text not null" } }, dbinit: function() { var dirservice = cc["@mozilla.org/file/directory_service;1"]. getservice(ci.nsiproperties); var dbfile = dirservice.get("profd", ci.nsifile); dbfile.append("tbird.sqlite"); var dbservice = cc["@mozilla.org/storage/service;1"]. ...
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RTCStatsReport - Web APIs
the rtcrtpreceiver and rtcrtpsender versions of getstats() specifically only return statistics available to the incoming or outgoing stream on which you call them. ...
...the rtcrtpreceiver and rtcrtpsender versions of getstats() specifically only return statistics available to the incoming or outgoing stream on which you call them. ...
...the rtcrtpreceiver and rtcrtpsender versions of getstats() specifically only return statistics available to the incoming or outgoing stream on which you call them. the statistics objects for each category of statistic information, there is a dictionary whose properties provide the relevant information. ...
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Using server-sent events - Web APIs
developing a web application that uses server-sent events is straightforward. you'll need a bit of code on the server to stream events to the front-end, but the client side code works almost identically to websockets in part of handling incoming events. this is one-way connection, so you can't send events from a client to a server. receiving events from the server the server-sent event api is contained in the eventsource interface; to open a connection to the server to begin receiving events from it, create a new eventsource object with the url of a script that generates the events. for example: const evtsource = new eventsource("ssedemo.php"); if the event generator script is hosted on a different origin, a new eventsource object should be created with both the url and an options dictiona...
...t.data).time; newelement.innerhtml = "ping at " + time; eventlist.appendchild(newelement); }); this code is similar, except that it will be called automatically whenever the server sends a message with the event field set to "ping"; it then parses the json in the data field and outputs that information. when not used over http/2, sse suffers from a limitation to the maximum number of open connections, which can be especially painful when opening multiple tabs, as the limit is per browser and is set to a very low number (6). the issue has been marked as "won't fix" in chrome and firefox. this limit is per browser + domain, which means that you can open 6 sse connections across all of the tabs to www.example1.com and another 6 sse connections to www.example2.com (per stackoverflow). when us...
...simple sse demo using php. error handling when problems occur (such as a network timeout or issues pertaining to access control), an error event is generated. you can take action on this programmatically by implementing the onerror callback on the eventsource object: evtsource.onerror = function(err) { console.error("eventsource failed:", err); }; closing event streams by default, if the connection between the client and server closes, the connection is restarted. the connection is terminated with the .close() method. evtsource.close(); event stream format the event stream is a simple stream of text data which must be encoded using utf-8. messages in the event stream are separated by a pair of newline characters. a colon as the first character of a line is in essence a comment, and is...
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Introduction to the Real-time Transport Protocol (RTP) - Web APIs
this article provides an overview of what rtp is and how it functions in the context of webrtc. note: webrtc actually uses srtp (secure real-time transport protocol) to ensure that the exchanged data is secure and authenticated as appropriate. keeping latency to a minimum is especially important for webrtc, since face-to-face communication needs to be performed with as little latency as possible. ...
... key features of rtp before examining rtp's use in webrtc contexts, it's useful to have a general idea of what rtp does and does not offer. rtp is a data transport protocol, whose mission is to move data between two endpoints as efficiently as possible under current conditions. those conditions may be affected by everything from the underlying layers of the network stack to the physical network connection, the intervening networks, the performance of the remote endpoint, noise levels, traffic levels, and so forth. since rtp is simply a data transport, it is augmented by the closely-related rtp control protocol (rtcp), which is defined in rfc 3550, section 6. rtcp adds features including quality of service (qos) monitoring, participant information sharing, and the like. it isn't adequate for th...
... inherently offer any features that ensure qos. instead, it only offers the information necessary to allow qos to be implemented elsewhere in the stack. rtp doesn't handle allocation or reservation of resources that may be needed. where it matters for webrtc purposes, these are dealt with in a variety of places within the webrtc infrastructure. for example, rtcp handles qos monitoring. ...
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Introduction to WebRTC protocols - Web APIs
ice uses stun and/or turn servers to accomplish this, as described below. ...
...ice uses stun and/or turn servers to accomplish this, as described below. ...
...ice uses stun and/or turn servers to accomplish this, as described below. ...
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Event reference
event name fired when focus an element has received focus (does not bubble). blur an element has lost focus (does not bubble). focusin an element is about to receive focus (does bubble). focusout an element is about to lose focus (does bubble). websocket events event name fired when open a websocket connection has been established. message a message is received through a websocket. error a websocket connection has been closed with prejudice (some data couldn't be sent for example). close a websocket connection has been closed. session history events event name fired when pagehide a session history entry is being traversed fr...
...uccess upgradeneeded versionchange script events afterscriptexecute beforescriptexecute menu events dommenuitemactive dommenuiteminactive window events close popup events popuphidden popuphiding popupshowing popupshown tab events visibilitychange battery events chargingchange chargingtimechange dischargingtimechange levelchange call events alerting busy callschanged cfstatechange connecting dialing disconnected disconnecting error held, holding incoming resuming statechange voicechange sensor events compassneedscalibration devicemotion deviceorientation orientationchange smartcard events icccardlockerror iccinfochange smartcard-insert smartcard-remove stkcommand stksessionend cardstatechange sms and ussd events delivered received sent ussdreceived frame events mozbrowserc...
... capture audio for speech recognition. beforeprint event html5 the associated document is about to be printed or previewed for printing. beforeunload beforeunloadevent html5 the window, the document and its resources are about to be unloaded. beginevent timeevent svg a smil animation element begins. blocked indexeddb an open connection to a database is blocking a versionchange transaction on the same database. blur focusevent dom l3 an element has lost focus (does not bubble). boundary speechsynthesisevent web speech api the spoken utterance reaches a word or sentence boundary canplay event html5 media the user agent can play the media, but estimates that not enough d...
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Evolution of HTTP - HTTP
one-line protocol. http/0.9 – the one-line protocol the initial version of http had no version number; it has been later called 0.9 to differentiate it from the later versions. http/0.9 is extremely simple: requests consist of a single line and start with the only possible method get followed by the path to the resource (not the url as both the protocol, server, and port are unnecessary once connected to the server). get /mypage.html the response is extremely simple too: it only consisted of the file itself. <html> a very simple html page </html> unlike subsequent evolutions, there were no http headers, meaning that only html files could be transmitted, but no other type of documents. there were no status or error codes: in case of a problem, a specific html file was send back with the d...
...ocuments than plain html files has been added (thanks to the content-type header). ...
...rotocol in parallel to the somewhat chaotic use of the diverse implementations of http/1.0, and since 1995, well before the publication of http/1.0 document the next year, proper standardization was in progress. the first standardized version of http, http/1.1 was published in early 1997, only a few months after http/1.0. http/1.1 clarified ambiguities and introduced numerous improvements: a connection can be reused, saving the time to reopen it numerous times to display the resources embedded into the single original document retrieved. pipelining has been added, allowing to send a second request before the answer for the first one is fully transmitted, lowering the latency of the communication. chunked responses are now also supported. additional cache control mechanisms have been intro...
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Upgrade - HTTP
http/2 explicitly disallows the use of this mechanism/header; it is specific to http/1.1. header type request header, response header forbidden header name yes overview the upgrade header field may be used by clients to invite a server to switch to one (or more) of the listed protocols, in descending preference order. ...
... forbidden header name yes overview the upgrade header field may be used by clients to invite a server to switch to one (or more) of the listed protocols, in descending preference order. ...
... the upgrade header field may be used by clients to invite a server to switch to one (or more) of the listed protocols, in descending preference order. for example, the client might send a get request as shown, listing the preferred protocols to switch to (in this case "example/1" and "foo/2"): get /index.html http/1.1 host: www.example.com connection: upgrade upgrade: example/1, foo/2 note: connection: upgrade must be set whenever upgrade is sent. ...
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Chapter 4: Using XPCOM—Implementing advanced processes - Archive of obsolete content
rouble with any of the details of the interface, it is helpful to search on the source code for usage examples within firefox. note: to look at the firefox 3 source code, choose "firefox 3" in the starting points list. for firefox 3.5 choose "mozilla 1.9.1." for the current development trunk of firefox, choose "mozilla central" and for thunderbird, choose "comm. central". calling xpcom from xpconnect use the xpconnect technology to use xpcom in javascript. listing 1 shows how you can use xpconnect to acquire references to xpcom services and create new xpcom objects. each component is identified with a contract id in the form @domain_name/module_name/component_name;version_number, and implements one or more interfaces that determine what functions can be called on these components. interface...
...be accessed with getservice(). for other components, you can create as many instances as you need. for instance, this is the case for files (nsilocalfile). those are created with createinstance(). it's important to know whether a component should be created with getservice() or createinstance(), because using one instead of the other can cause problems. ...
...g xpcom functions using xpconnect <?xml version="1.0" encoding="utf-8"?> <page xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"> <script type="application/javascript"><![cdata[ var ioservice = components.classes['@mozilla.org/network/io-service;1'] .getservice(components.interfaces.nsiioservice); alert(ioservice); ]]></script> </page> calling xpconnect using local files try saving the contents of listing 1 as the file test.xul, somewhere on your desktop, and drag and drop it into firefox to open it. you'll note that even though the file includes an alert method, nothing happens. this is a by-product of the fact that test.xul currently doesn’t have privileges. in order to use xpconnect, the file needs special universalxpconnect privileges. b...
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How do you upload your files to a web server? - Learn web development
rver) is a fictitious company "example hosting provider" whose urls look like this: mypersonalwebsite.examplehostingprovider.net. we have just opened an account and received this info from them: congratulations for opening an account at example hosting provider. your account is: demozilla your website will be visible at demozilla.examplehostingprovider.net to publish to this account, please connect through sftp with the following credentials: sftp server: sftp://demozilla.examplehostingprovider.net username: demozilla password: quickbrownfox port: 5548 to publish on the web, put your files into the public/htdocs directory. let's first look at http://demozilla.examplehostingprovider.net/ — as you can see, so far there is nothing there: note: depending on your hosting provider...
...ort: 5548 to publish on the web, put your files into the public/htdocs directory. let's first look at http://demozilla.examplehostingprovider.net/ — as you can see, so far there is nothing there: note: depending on your hosting provider, most of the time you'll see a page saying something like “this website is hosted by [hosting service].” when you first go to your web address. to connect your sftp client to the distant server, follow these steps: choose file > site manager... from the main menu. in the site manager window, press the new site button, then fill in the site name as demozilla in the provided space. fill in the sftp server your host provided in the host: field. in the logon type: drop down, choose normal, then fill in your provided username and password in the r...
...e manager window, press the new site button, then fill in the site name as demozilla in the provided space. fill in the sftp server your host provided in the host: field. in the logon type: drop down, choose normal, then fill in your provided username and password in the relevant fields. fill in the correct port and other information. ...
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sslintro.html
hich cipher suites are permitted by policy (for example, to comply with export restrictions). cipher suites disabled by policy cannot be enabled by user preference. one of these functions must be called before any cryptographic operations can be performed with nss. ssl_cipherprefsetdefault. enables all ciphers chosen by user preference. optional. ...
...hic operations can be performed with nss. ssl_cipherprefsetdefault. enables all ciphers chosen by user preference. optional. initializing caches ssl peers frequently reconnect after a relatively short time has passed. to avoid the overhead of repeating the full ssl handshake in situations like this, the ssl protocol supports the use of a session cache, which retains information about each connection, such as the master secret generated during the ssl handshake, for a predetermined length of time. if ssl can locate the information about a previous connection in the local session cache, it can reestablish the connection much more quickly than it can without the connection information. by default, ssl allocates one session cache. this default cache is called the client session id cache, (al...
...od. ssl_importfd. makes an nspr socket into an ssl socket. required. brings an ordinary nspr socket into the ssl library, returning a new nspr socket that can be used to make ssl calls. you can pass this function a model file descriptor to create the new ssl socket with the same configuration state as the model. it is also possible for an application to import a socket into ssl after the tcp connection on that socket has already been established. in this case, initial configuration takes place in the same way: pass the existing nspr file descriptor to ssl_importfd and perform any additional configuration that has not already been determined by the model file descriptor. configuration functions control the configuration of an individual socket. pr_getsocketoption. retrieves the socket o...
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nsIWebSocketChannel
ibute type description extensions acstring sec-websocket-extensions response header value. read only. loadgroup nsiloadgroup the load group of the websockets code. notificationcallbacks nsiinterfacerequestor the notification callbacks for authorization and so forth. originaluri nsiuri the original uri used to construct the protocol connection. this is used in the case of a redirect or uri "resolution" (for example resolving a resource: uri to a file: uri) so that the original pre-redirect uri can still be obtained. this is never null. read only. protocol acstring sec-websocket-protocol value. securityinfo nsisupports transport-level security information (if any). read only. uri nsiuri th...
...edirect or uri "resolution" (for example resolving a resource: uri to a file: uri) so that the original pre-redirect uri can still be obtained. this is never null. read only. protocol acstring sec-websocket-protocol value. securityinfo nsisupports transport-level security information (if any). read only. uri nsiuri the uri corresponding to the protocol connection after any redirections are completed. read only. status codes the following values are permitted status codes. status code name description 0-999 reserved and not used. 1000 close_normal normal closure; the connection successfully completed whatever purpose for which it was created. 1001 close_going_away the endpoint is going ...
... codes. status code name description 0-999 reserved and not used. 1000 close_normal normal closure; the connection successfully completed whatever purpose for which it was created. 1001 close_going_away the endpoint is going away, either because of a server failure or because the browser is navigating away from the page that opened the connection. 1002 close_protocol_error the endpoint is terminating the connection due to a protocol error. ...
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NetworkInformation.downlinkMax - Web APIs
the networkinformation.downlinkmax read-only property returns the maximum downlink speed, in megabits per second (mbps), for the underlying connection technology. note: this feature is available in web workers. syntax var max = networkinformation.downlinkmax return value an unrestricted double representing the maximum downlink speed, in megabits per second (mb/s), for the underlying connection technology. examples the following example monitors the connection using the change event and logs changes as they occur. ...
...nnection technology. note: this feature is available in web workers. syntax var max = networkinformation.downlinkmax return value an unrestricted double representing the maximum downlink speed, in megabits per second (mb/s), for the underlying connection technology. examples the following example monitors the connection using the change event and logs changes as they occur. ...
...e: this feature is available in web workers. syntax var max = networkinformation.downlinkmax return value an unrestricted double representing the maximum downlink speed, in megabits per second (mb/s), for the underlying connection technology. examples the following example monitors the connection using the change event and logs changes as they occur. ...
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RTCDataChannel.readyState - Web APIs
the read-only rtcdatachannel property readystate returns an enum of type rtcdatachannelstate which indicates the state of the data channel's underlying data connection. syntax var state = adatachannel.readystate; values a string which is one of the values in the rtcdatachannelstate enum, indicating the current state of the underlying data transport. rtcdatachannelstate enum the rtcdatachannelstate enum defines string constants which reflect the current status of the rtcdatachannel's underlying data connection. constant description "connecting" the user agent (browser) is in the process of creating the underlying data transport; that is, whatever network level connection is used to link the two peers together is in the process of being set up. this is...
... "open" the underlying data transport has been established and data can be transferred bidirectionally across it. ...
... "open" the underlying data transport has been established and data can be transferred bidirectionally across it. this is the default state of a new rtcdatachannel created by the webrtc layer when the remote peer created the channel and delivered to the site or app in a datachannel event of type rtcdatachannelevent. ...
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RTCDtlsTransport.state - Web APIs
the state read-only property of the rtcdtlstransport interface provides information which describes a datagram transport layer security (dtls) transport state. syntax let mystate = dtlstransport.state; value a string whose value is taken from the rtcdtlstransportstate enumerated type. its value is one of the following: new the initial state when dtls has not started negotiating yet. connecting dtls is in the process of negotiating a secure connection and verifying the remote fingerprint. connected dtls has completed negotiation of a secure connection and verified the remote fingerprint. closed the transport has been closed intentionally as the result of receipt of a close_notify alert, or calling rtcpeerconnection.close(). failed the transport has failed as the result of an error...
...the remote fingerprint. closed the transport has been closed intentionally as the result of receipt of a close_notify alert, or calling rtcpeerconnection.close(). failed the transport has failed as the result of an error (such as receipt of an error alert or failure to validate the remote fingerprint). examples this example presents a function, tallysenders(), which iterates over an rtcpeerconnection's rtcrtpsenders, tallying up how many of them are in various states. the function returns an object containing properties whose values indicate how many of the senders are in each state. ...
...error (such as receipt of an error alert or failure to validate the remote fingerprint). examples this example presents a function, tallysenders(), which iterates over an rtcpeerconnection's rtcrtpsenders, tallying up how many of them are in various states. the function returns an object containing properties whose values indicate how many of the senders are in each state. let pc = new rtcpeerconnection({ bundlepolicy: "max-bundle" }); /* ... ...
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RTCIceTransportState - Web APIs
or the remote device to begin to transmit the remote candidates, or both. in this state, checking of candidates to look for those which might be acceptable has not yet begun. "checking" at least one remote candidate has been received, and the rtcicetransport has begun examining pairings of remote and local candidates in order to attempt to identify viable pairs that could be used to establish a connection. keep in mind that gathering of local candidates may still be underway, and, similarly, the remote device also may still be gathering candidates of its own. "connected" a viable candidate pair has been found and selected, and the rtcicetransport has connected the two peers together using that pair. however, there are still candidates pairings to consider, and there may still be gathering u...
... similarly, the remote device also may still be gathering candidates of its own. "connected" a viable candidate pair has been found and selected, and the rtcicetransport has connected the two peers together using that pair. however, there are still candidates pairings to consider, and there may still be gathering underway on one or both of the two devices. the transport may revert from the "connected" state to the "checking" state if either peer decides to cancel consent to use the selected candidate pair, and may revert to "disconnected" if there are no candidates left to check but one or both clients are still gathering candidates. "completed" the transport has finished gathering local candidates and has received a notification from the remote peer that no more candidates will be sent...
...lients are still gathering candidates. "completed" the transport has finished gathering local candidates and has received a notification from the remote peer that no more candidates will be sent. in addition, all candidate pairs have been considered and a pair has been selected for use. if consent checks fail on all successful candidate pairs, the transport state will change to "failed". "disconnected" the ice agent has determined that connectivity has been lost for this rtcicetransport. this is not a failure state (that's "failed"). a value of "disconnected" means that a transient issue has occurred that has broken the connection, but that should resolve itself automatically without your code having to take any action. see the disconnected state for additional details. "failed" the rtcic...
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Populating the page: how browsers work - Web Performance
ave to be made for each one. this can be problematic for performance, particularly on mobile networks. when a user is on a mobile network, each dns lookup has to go from the phone to the cell tower to reach an authoritative dns server. the distance between a phone, a cell tower, and the name server can add significant latency. tcp handshake once the ip address is known, the browser sets up a connection to the server via a tcp three-way handshake. this mechanism is designed so that two entities attempting to communicate—in this case the browser and web server—can negotiate the parameters of the network tcp socket connection before transmitting data, often over https. tcp's three way handshaking technique is often referred to as "syn-syn-ack"—or more accurately syn, syn-ack, ack—becau...
...smitting data, often over https. tcp's three way handshaking technique is often referred to as "syn-syn-ack"—or more accurately syn, syn-ack, ack—because there are three messages transmitted by tcp to negotiate and start a tcp session between two computers. yes, this means three more messages back and forth between each server, and the request has yet to be made. tls negotiation for secure connections established over https, another "handshake" is required. this handshake, or rather the tls negotiation, determines which cipher will be used to encrypt the communication, verifies the server, and establishes that a secure connection is in place before beginning the actual transfer of data. this requires three more round trips to the server before the request for content is actually sent. w...
... over https, another "handshake" is required. this handshake, or rather the tls negotiation, determines which cipher will be used to encrypt the communication, verifies the server, and establishes that a secure connection is in place before beginning the actual transfer of data. this requires three more round trips to the server before the request for content is actually sent. while making the connection secure adds time to the page load, a secure connection is worth the latency expense, as the data transmitted between the browser and the web server cannot be decrypted by a third party. ...
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The Joy of XUL - Archive of obsolete content
this guide is designed to introduce application developers and their managers to xul so they can not only understand why mozilla's platform is based on it, but how they might adopt it for their own use. xul (pronounced "zool") is mozilla's xml-based user interface language that lets you build feature rich cross-platform applications that can run connected to or disconnected from the internet. these applications are easily customized with alternative text, graphics, and layout so they can be readily branded or localized for various markets. web developers already familiar with dynamic html (dhtml) will learn xul quickly and can start building applications right away. also described are some reasons application developers might choose to leverage xul and mozilla technology for building cro...
...h to keep proprietary. the netscape public license (npl) and mozilla public license (mpl) require developers who alter original work (source code files that are provided with mozilla) to release the source code for these changes to their customers. overlays can be used to add features to mozilla without contaminating the original open source code with proprietary alterations. ...
...the netscape public license (npl) and mozilla public license (mpl) require developers who alter original work (source code files that are provided with mozilla) to release the source code for these changes to their customers. overlays can be used to add features to mozilla without contaminating the original open source code with proprietary alterations. ...
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Using the Right Markup to Invoke Plugins - Archive of obsolete content
itecture. here's an example of this kind of usage for ie: <!-- ie only code --> <object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=5,0,0,0" width="366" height="142" id="myflash"> <param name="movie" value="javascript-to-flash.swf" /> <param name="quality" value="high" /> <param name="swliveconnect" value="true" /> </object> in the above example, the classid attribute that goes along with the object element points to a "clsid:" urn followed by the unique identifier of an activex control (in the above example, the string beginning with "d27..."). this is, in fact, the unique identifier of macromedia's flash plugin, and developers are expected to know such unique identifiers in order to inv...
...illa-based browsers support the use of the object element along with a mime type. here is an example of this usage, once again for the macromedia flash plugin: <object type="application/x-shockwave-flash" data="javascript-to-flash.swf" width="366" height="142" id="myflash"> <param name="movie" value="javascript-to-flash.swf" /> <param name="quality" value="high" /> <param name="swliveconnect" value="true" /> <p>you need flash -- get the latest version from <a href= "http://www.macromedia.com/downloads/">here.</a></p> </object> in the above example, application/x-shockwave-flash is the flash mime type, and will invoke the netscape-specific flash architecture in mozilla-based browsers. the data attribute points to the swf file to play, and the configuration parameters (the pa...
... understands the mime type for flash: <!-- usage will not work as intended --> <object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=5,0,0,0" width="366" height="142" id="myflash"> <param name="movie" value="javascript-to-flash.swf" /> <param name="quality" value="high" /> <param name="swliveconnect" value="true" /> <object type="application/x-shockwave-flash" data="javascript-to-flash.swf" width="366" height="142" id="myflashnscp"> <param name="movie" value="javascript-to-flash.swf" /> <param name="quality" value="high" /> <param name="swliveconnect" value="true" /> <p>you need flash -- get the latest version from <a href="http://www.macromedia.com/downloads/"> here...
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ICE - MDN Web Docs Glossary: Definitions of Web-related terms
ice (interactive connectivity establishment) is a framework used by webrtc (among other technologies) for connecting two peers, regardless of network topology (usually for audio and video chat). this protocol lets two peers find and establish a connection with one another even though they may both be using network address translator (nat) to share a global ip address with other devices on their respective local networks. ...
...technologies) for connecting two peers, regardless of network topology (usually for audio and video chat). this protocol lets two peers find and establish a connection with one another even though they may both be using network address translator (nat) to share a global ip address with other devices on their respective local networks. ...
...(usually for audio and video chat). this protocol lets two peers find and establish a connection with one another even though they may both be using network address translator (nat) to share a global ip address with other devices on their respective local networks. ...
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How does the Internet work? - Learn web development
mmunicate all together. the history of the internet is somewhat obscure. it began in the 1960s as a us-army-funded research project, then evolved into a public infrastructure in the 1980s with the support of many public universities and private companies. the various technologies that support the internet have evolved over time, but the way it works hasn't changed that much: internet is a way to connect computers all together and ensure that, whatever happens, they find a way to stay connected. active learning how the internet works in 5 minutes: a 5 minute video to understand the very basics of internet by aaron titus. how does the internet work? detailed well visualized 8 minute video. deeper dive a simple network when two computers need to communicate, you have to link them, either p...
...: a 5 minute video to understand the very basics of internet by aaron titus. how does the internet work? detailed well visualized 8 minute video. deeper dive a simple network when two computers need to communicate, you have to link them, either physically (usually with an ethernet cable) or wirelessly (for example with wifi or bluetooth systems). ...
...computers need to communicate, you have to link them, either physically (usually with an ethernet cable) or wirelessly (for example with wifi or bluetooth systems). all modern computers can sustain any of those connections. note: for the rest of this article, we will only talk about physical cables, but wireless networks work the same. such a network is not limited to two computers. you can connect as many computers as you wish. but it gets complicated quickly. if you're trying to connect, say, ten computers, you need 45 cables, with nine plugs per computer! to solve this problem, each computer on a network is connected to a special tiny computer called a router. this router has only one job: like a signaler at a railway station, it makes sure that a message sent from a given computer ar...
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wrappedJSObject
wrappedjsobject is a property sometimes available on xpconnect wrappers. when available, it lets you access the javascript object hidden by the wrapper. there are two kinds of xpconnect wrappers that support the wrappedjsobject property: xpcnativewrappers which are used to protect the chrome code working with content objects. see xpcnativewrapper for detailed documentation. regular xpconnect wrappers which you can encounter, for example, when using xpcom components implemented in js. this article focuses on the latter kind of wrappers, which hide any properties or methods on the component that are not part of the supported interfaces as declared in xpidl. the rest of this article demonstrates what xpconnect wrappers do and how wrappedjsobject can be used to bypass them. example c...
...e @myself.com/my-component;1 contract. ...
...ce: function(aiid) { if (!aiid.equals(components.interfaces.nsisupports) && !aiid.equals(components.interfaces.nsihelloworld)) throw components.results.ns_error_no_interface; return this; } }; xpconnect wrapping now let's get a reference to our component. ...
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WebIDL bindings
you want here. return; } // for some reason we want to catch and rethrow exceptions from setsomenumber, say. acallback.setsomenumber(2*number, rv, erethrowexceptions); if (rv.failed()) { // the exception is now stored on rv. this code must report // it usefully; otherwise it will assert. } } external interfaces external interfaces are represented in c++ as objects that xpconnect knows how to unwrap to. this can mean xpcom interfaces (whether declared in xpidl or not) or it can mean some type that there's a castable native unwrapping function for. the c++ type to be used should be the nativetype listed for the external interface in the bindings.conf file. the exact representation depends on how the type is being used. arguments become nsifoo*. return values can be alr...
...ment, defaulting to ereportexceptions, and calling it will invoke the callable with undefined as the this value. the second call method allows passing in an explicit this value as the first argument. this second call method is a template on the type of the first argument, so the this value can be passed in in whatever form is most convenient, as long as it's either a type that can be wrapped by xpconnect or a webidl interface type. if areportexceptions is set to ereportexceptions, the call methods will report js exceptions before returning. if areportexceptions is set to erethrowexceptions, js exceptions will be stashed in the errorresult and will be reported when the stack unwinds to wherever the errorresult was set up. for example, this webidl: callback mycallback = long (myinterface arg1, ...
...gincallable] used to flag a method that, when called, will not have the same-origin constraint tested: it can be called from a context with a different origin. [securecontext] we implement the standard extended attribute with a few details specific to gecko: system principals are considered secure. an extension poking at non-secured dom objects will see apis marked with [securecontext]. xpconnect sandboxes doesn't see [securecontext] apis, but this may change in bug 1273687. [needssubjectprincipal], [getterneedssubjectprincipal], [setterneedssubjectprincipal] used to flag a method or an attribute that needs to know the subject principal. this principal will be passed as argument. if the interface is not exposed on any worker global, the argument will be a nsiprincipal& because a subje...
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EventSource - Web APIs
if there is an event field in the incoming message, the triggered event is the same as the event field value. if no event field is present, then a generic message event is fired. ...
...if there is an event field in the incoming message, the triggered event is the same as the event field value. if no event field is present, then a generic message event is fired. ...
...if there is an event field in the incoming message, the triggered event is the same as the event field value. if no event field is present, then a generic message event is fired. ...
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RTCConfiguration.bundlePolicy - Web APIs
the rtcconfiguration dictionary's bundlepolicy property is a string value indicating which sdp bundling policy, if any, to use for the underlying rtp streams used by an rtcpeerconnection. the configuration object is used as an input to the rtcpeerconnection() constructor. syntax let rtcconfiguration = { bundlepolicy: policy }; rtcconfiguration.bundlepolicy = policy; value a domstring identifying the sdp bundling policy to use for the rtp streams used by the rtcpeerconnection. this string, which must be a member of the rtcbundlepolicy enumeration, has the following possible values: balanced the ice agent begins by creating one rtcdtlstransport to handle each type of content added: one for audio, one for video, and one for the rtc data channel, if applicable. if the remote peer isn't ...
...ues: balanced the ice agent begins by creating one rtcdtlstransport to handle each type of content added: one for audio, one for video, and one for the rtc data channel, if applicable. if the remote peer isn't bundle-aware, the ice agent chooses one audio track and one video track and those two tracks are each assigned to the corresponding rtcdtlstransport. all other tracks are ignored by the connection. this is the default, and most compatible, policy. max-compat the ice agent intially creates one rtcdtlstransport for each media track and a separate one for the rtcdatachannel, if one is created. if the remote endpoint can't handle bundling, each media track is negotiated on its own separate transport. this introduces bundling but will fall back to not bundling if the remote peer can't hand...
...ne rtcdtlstransport for each media track and a separate one for the rtcdatachannel, if one is created. if the remote endpoint can't handle bundling, each media track is negotiated on its own separate transport. this introduces bundling but will fall back to not bundling if the remote peer can't handle it. ...
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Using WebRTC data channels - Web APIs
since all webrtc components are required to use encryption, any data transmitted on an rtcdatachannel is automatically secured using datagram transport layer security (dtls). see security below for more information. ...
... since all webrtc components are required to use encryption, any data transmitted on an rtcdatachannel is automatically secured using datagram transport layer security (dtls). see security below for more information. ...
...nnel can be created in one of two ways: let webrtc create the transport and announce it to the remote peer for you (by causing it to receive a datachannel event). this is the easy way, and works for a wide variety of use cases, but may not be flexible enough for your needs. write your own code to negotiate the data transport and write your own code to signal to the other peer that it needs to connect to the new channel. let's look at each of these cases, starting with the first, which is the most common. automatic negotiation often, you can allow the peer connection to handle negotiating the rtcdatachannel connection for you. to do this, simply call createdatachannel() without specifying a value for the negotiated property, or specifying the property with a value of false. this will auto...
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Using the Web Audio API - Web APIs
n a play button, for instance), we're in good shape and should have no problems from autoplay blocking. so, let's start by taking a look at our play and pause functionality. ...
...n the track is playing: <button data-playing="false" role="switch" aria-checked="false"> <span>play/pause</span> </button> before we can play our track we need to connect our audio graph from the audio source/input node to the destination. we've already created an input node by passing our audio element into the api. for the most part, you don't need to create an output node, you can just connect your other nodes to baseaudiocontext.destination, which handles the situation for you: track.connect(audiocontext.destination); a good way to visualise these nodes is by drawing an audio graph so you can visualize it. this is what our current audio graph looks like: now we can add the play and pause functionality. // select our play button const playbutton = document.queryselector('button'...
...epresents how big our sound wave is. there are two ways you can create nodes with the web audio api. you can use the factory method on the context itself (e.g. audiocontext.creategain()) or via a constructor of the node (e.g. new gainnode()). we'll use the factory method in our code: const gainnode = audiocontext.creategain(); now we have to update our audio graph from before, so the input is connected to the gain, then the gain node is connected to the destination: track.connect(gainnode).connect(audiocontext.destination); this will make our audio graph look like this: the default value for gain is 1; this keeps the current volume the same. gain can be set to a minimum of about -3.4 and a max of about 3.4. here we'll allow the boombox to move the gain up to 2 (double the original volum...
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How to check the security state of an XMLHTTPRequest over SSL - Web APIs
here is a an example javascript function that prints the security details of an xmlhttprequest sent over ssl. the function is passed the channel property of an xmlhttprequest to extract the following information: was the connection secure? was the used ssl certificate valid and what are its details (owner, expiration, certificate authority, etc.)? notes: this code requires elevated privileges to run; you can only call it from a browser extension or from a xulrunner application. the channel property becomes available only after the request is sent and the connection was established, that is, on readystate loaded, interactive or completed. by setting the mozbackgroundrequest property of the request object and modifying the example appropriately, you can create your own alert dialog ...
... ssl_error_unsupported_version, ssl(9) errname = 'securityunsupportedtlsversionerror'; break; case 12: // ssl_error_bad_cert_domain, ssl(12) errname = 'securitycertificatedomainmismatcherror'; break; default: errname = 'securityerror'; break; } } } else { errtype = 'network'; switch (status) { // connect to host:port failed case 0x804b000c: // ns_error_connection_refused, network(13) errname = 'connectionrefusederror'; break; // network timeout error case 0x804b000e: // ns_error_net_timeout, network(14) errname = 'networktimeouterror'; break; // hostname lookup failed case 0x804b001e: // ns_error_unknown_host, network(30) errna...
...nd // contains a documented tcperror.webidl that maps all the error codes we use in // this file to slightly more readable explanations. ...
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Cross-Origin Resource Sharing (CORS) - HTTP
rticle. simple requests some requests don’t trigger a cors preflight. those are called “simple requests” in this article, though the fetch spec (which defines cors) doesn’t use that term. ...
...eges: let's look at what the browser will send to the server in this case, and let's see how the server responds: get /resources/public-data/ http/1.1 host: bar.other user-agent: mozilla/5.0 (macintosh; intel mac os x 10.14; rv:71.0) gecko/20100101 firefox/71.0 accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 accept-language: en-us,en;q=0.5 accept-encoding: gzip,deflate connection: keep-alive origin: https://foo.example the request header of note is origin, which shows that the invocation is coming from https://foo.example. http/1.1 200 ok date: mon, 01 dec 2008 00:23:53 gmt server: apache/2 access-control-allow-origin: * keep-alive: timeout=2, max=100 connection: keep-alive transfer-encoding: chunked content-type: application/xml […xml data…] in response, the ...
...options request. let's look at the full exchange between client and server. ...
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Index - HTTP
ve in a request is not implying that the same directive is to be given in the response. 20 clear-site-data http, http header, reference, header the clear-site-data header clears browsing data (cookies, storage, cache) associated with the requesting website. it allows web developers to have more control over the data stored locally by a browser for their origins. 21 connection http, headers, reference, web the connection general header controls whether or not the network connection stays open after the current transaction finishes. if the value sent is keep-alive, the connection is persistent and not closed, allowing for subsequent requests to the same server to be done. 22 content-disposition http, reference, header in a multipart/for...
...ed using https. 31 csp: child-src csp, directive, http, reference, security the deprecated http content-security-policy (csp) child-src directive defines the valid sources for web workers and nested browsing contexts loaded using elements such as <frame> and <iframe>. for workers, non-compliant requests are treated as fatal network errors by the user agent. 32 csp: connect-src csp, directive, http, reference, security the http content-security-policy (csp) connect-src directive restricts the urls which can be loaded using script interfaces. the apis that are restricted are: 33 csp: default-src csp, directive, http, reference, security the http content-security-policy (csp) default-src directive serves as a fallback for the other csp f...
...thod, only if it has not been last modified after the given date. if the resource has been modified after the given date, the response will be a 412 (precondition failed) error. 82 index http, http header, index found 115 pages: 83 keep-alive general header, http, http header, reference the keep-alive general header allows the sender to hint about how the connection may be used to set a timeout and a maximum amount of requests. 84 large-allocation http, http header, non-standard, reference, response header, header the non-standard large-allocation response header tells the browser that the page being loaded is going to want to perform a large allocation. it is currently only implemented in firefox, but is harmless to send to every bro...
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HTTP headers - HTTP
contain more information about the resource to be fetched, or about the client requesting the resource. response headers hold additional information about the response, like its location or about the server providing it. entity headers contain information about the body of the resource, like its content length or mime type. headers can also be grouped according to how proxies handle them: connection keep-alive proxy-authenticate proxy-authorization te trailer transfer-encoding upgrade (see also protocol upgrade mechanism). end-to-end headers these headers must be transmitted to the final recipient of the message: the server for a request, or the client for a response. intermediate proxies must retransmit these headers unmodified and caches must store them. hop-by-hop headers ...
...ailer transfer-encoding upgrade (see also protocol upgrade mechanism). end-to-end headers these headers must be transmitted to the final recipient of the message: the server for a request, or the client for a response. intermediate proxies must retransmit these headers unmodified and caches must store them. hop-by-hop headers these headers are meaningful only for a single transport-level connection, and must not be retransmitted by proxies or cached. note that only hop-by-hop headers may be set using the connection general header. authentication www-authenticate defines the authentication method that should be used to access a resource. authorization contains the credentials to authenticate a user-agent with a server. proxy-authenticate defines the authentication method that sh...
...transmitted only if it has not been modified after the given date. this ensures the coherence of a new fragment of a specific range with previous ones, or to implement an optimistic concurrency control system when modifying existing documents. vary determines how to match request headers to decide whether a cached response can be used rather than requesting a fresh one from the origin server. connection management connection controls whether the network connection stays open after the current transaction finishes. keep-alive controls how long a persistent connection should stay open. content negotiation accept informs the server about the types of data that can be sent back. accept-charset which character encodings the client understands. accept-encoding the encoding algorithm...
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Network Error Logging - HTTP
s server failed due to reasons not covered by previous errors (e.g. servfail) dns.address_changed for security reasons, if the server ip address that delivered the original report is different to the current server ip address at time of error generation, the report data will be downgraded to only include information about this problem and the type set to dns.address_changed. ...
...rrors (e.g. servfail) dns.address_changed for security reasons, if the server ip address that delivered the original report is different to the current server ip address at time of error generation, the report data will be downgraded to only include information about this problem and the type set to dns.address_changed. ...
... reasons, if the server ip address that delivered the original report is different to the current server ip address at time of error generation, the report data will be downgraded to only include information about this problem and the type set to dns.address_changed. ...
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Proxy Auto-Configuration (PAC) file - HTTP
be extracted from the url when necessary. description returns a string describing the configuration. the format of this string is defined in return value format below. ...
...in that case, the next value will be used, etc. the browser will automatically retry a previously unresponsive proxy after 30 minutes. additional attempts will continue beginning at one hour, always adding 30 minutes to the elapsed time between attempts. if all proxies are down, and there was no direct option specified, the browser will ask if proxies should be temporarily igno...
.... in that case, the next value will be used, etc. the browser will automatically retry a previously unresponsive proxy after 30 minutes. additional attempts will continue beginning at one hour, always adding 30 minutes to the elapsed time between attempts. if all proxies are down, and there was no direct option specified, the browser will ask if proxies should be temporarily ignored, and direct connections attempted. after 20 minutes, the browser will ask if proxies should be retried, asking again after an additional 40 minutes. queries will continue, always adding 20 minutes to the elapsed time between queries. examples proxy w3proxy.netscape.com:8080; proxy mozilla.netscape.com:8081 primary proxy is w3proxy:8080; if that goes down start using mozilla:8081 until the primary proxy comes up...
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Using custom elements - Web Components
so: class wordcount extends htmlparagraphelement { constructor() { // always call super first in constructor super(); // element functionality written in here ... } } this is just a simple example, but there is more you can do here. it is possible to define specific lifecycle callbacks inside the class, which run at specific points in the element's lifecycle. for example, connectedcallback is invoked each time the custom element is appended into a document-connected element, while attributechangedcallback is invoked when one of the custom element's attributes is added, removed, or changed. you'll learn more about these in the using the lifecycle callbacks section below. there are two types of custom elements: autonomous custom elements are standalone — they don't i...
...ifferent: <ul is="expanding-list"> ... </ul> you use a <ul> element as normal, but specify the name of the custom element inside the is attribute. note: again, you can see the full javascript source code here. ...
... but specify the name of the custom element inside the is attribute. note: again, you can see the full javascript source code here. using the lifecycle callbacks you can define several different callbacks inside a custom element's class definition, which fire at different points in the element's lifecycle: connectedcallback: invoked each time the custom element is appended into a document-connected element. this will happen each time the node is moved, and may happen before the element's contents have been fully parsed. note: connectedcallback may be called once your element is no longer connected, use node.isconnected to make sure. disconnectedcallback: invoked each time the custom element is disconnected from the document's dom. adoptedcallback: invoked each time the custom...
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Remotely debugging Firefox for Metro - Archive of obsolete content
classic "desktop" mode on windows, mac os x, or linux, either on a separate computer or in a separate profile on the same computer. set up firefox for metro go to about:config in firefox for metro, and set the following required preference: devtools.debugger.remote-enabled = true you may also want to set these optional preferences: devtools.debugger.force-local = false (if you want to connect from a different machine over the network) devtools.debugger.remote-host (to change the tcp hostname where firefox will listen for connections) devtools.debugger.remote-port (to change the tcp port number where firefox will listen for connections) devtools.debugger.prompt-connection = false (allow connections without displaying a confirmation prompt. this can be a security risk, especially if...
...y if you also set the force-local preference to false.) set up firefox for desktop on the desktop, remote debugging is enabled by a setting in the toolbox. open the toolbox, click the "settings" button in the toolbar, and check "enable remote debugging" in the settings tab. if you're using a version of firefox older than 27, you'll need to restart the browser for the setting to take effect. ...
... on the desktop, remote debugging is enabled by a setting in the toolbox. open the toolbox, click the "settings" button in the toolbar, and check "enable remote debugging" in the settings tab. if you're using a version of firefox older than 27, you'll need to restart the browser for the setting to take effect. connecting on the desktop on the desktop, open the web developer menu and select "connect...". ...
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Back to the Server: Server-Side JavaScript On The Rise - Archive of obsolete content
and include the path in your classpath environment variable. the code in listing 1 is a sample javascript script which incorporates java classes to handle the database query. ...
...iable. the code in listing 1 is a sample javascript script which incorporates java classes to handle the database query. ...
... ": " + rs.getobject( i ) + "\n" ); } print( "----------\n" ); } // cleanup rs.close(); stmt.close(); conn.close(); this code starts off by using a rhino function named importpackage which is just like using the import statement in java. here, we’re including all the classes in the java.sql namespace in the script. the appropriate database driver for mysql is loaded and the connection string to a database named rhino on my local machine is configured using the user account urhino with the password of prhino. the sql statement is prepared, executed, and printed with the help of the metadata obtained from the resultset. sample output is shown in listing 2. id: 1 first_name: sammy last_name: hamm department: it title: network administrator ---------- id: 2 first_name: nigel l...
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PR_NewTCPSocket
creates a new ipv4 tcp socket. syntax #include <prio.h> prfiledesc* pr_newtcpsocket(void); returns the function returns one of the following values: upon successful completion, a pointer to the prfiledesc object created for the newly opened ipv4 tcp socket. if the creation of a new tcp socket failed, null. ...
... function returns one of the following values: upon successful completion, a pointer to the prfiledesc object created for the newly opened ipv4 tcp socket. if the creation of a new tcp socket failed, null. description tcp (transmission control protocol) is a connection-oriented, reliable byte-stream protocol of the tcp/ip protocol suite. pr_newtcpsocket creates a new ipv4 tcp socket. a tcp connection is established by a passive socket (the server) accepting a connection setup request from an active socket (the client). ...
...to receive data, one can call pr_read or pr_recv. to send data, one can call pr_write, pr_writev, pr_send, or pr_transmitfile. ...
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Mozilla internal string guide
string types the c++ signatures follow the abstract-type convention described above, such that all method parameters are based on the abstract classes. the following table describes the purpose of each string type in idl. idl type c++ type purpose string char* raw character pointer to ascii (7-bit) string, no string classes used. high bit is not guaranteed across xpconnect boundaries. wstring char16_t* raw character pointer to utf-16 string, no string classes used. astring nsastring utf-16 string. acstring nsacstring 8-bit string. all bits are preserved across xpconnect boundaries. autf8string nsacstring utf-8 string. converted to utf-16 as necessary when value is used across xpconnect boundaries. ...
...the special javascript value undefined becomes the string "undefined". ...
...the implementation of getutf16string() will use aresult.assign to "return" the value. in setutf16string() the value of the string can be used through a variety of methods including iterators, promiseflatstring, and assignment to other strings. in getvalue(), the first parameter, akey, is treated as a raw sequence of 8-bit values. any non-ascii characters in akey will be preserved when crossing xpconnect boundaries. the implementation of getvalue() will assign a utf-8 encoded 8-bit string into aresult. if the this method is called across xpconnect boundaries, such as from a script, then the result will be decoded from utf-8 into utf-16 and used as a unicode value. choosing a string type it can be difficult to determine the correct string type to use for idl. the following points should help det...
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mozIStorageAggregateFunction
this is an interface that must be implemented by consumers. it allows consumers to add aggregate functions that are available to sql queries and triggers. an aggregate function is a function that returns one value from a series of values. there are a number of already defined aggregate functions provided by sqlite. objects implementing this interface can be registered with mozistorageconnection.createaggregatefunction(). storage/public/mozistorageaggregatefunction.idlscriptable please add a summary to this article. last changed in gecko 1.9 (firefox 3) inherits from: nsisupports method overview void onstep(in mozistoragevaluearray afunctionarguments); nsivariant onfinal(); methods onstep() this is called for each row of results returned by the...
...hod overview void onstep(in mozistoragevaluearray afunctionarguments); nsivariant onfinal(); methods onstep() this is called for each row of results returned by the query. the implementation should store or perform some work to prepare to return a value. note this callback is executed on the thread that the statement or trigger is executing on. if you use mozistorageconnection.executeasync() or, mozistoragestatement.executeasync() this callback will run on a different thread from the rest of your code. likewise, if you execute sql on a different thread, this callback will be executed on that thread. this callback should be reentrant if any of the above applies to your use of the storage apis! void onstep( in mozistoragevaluearray afunctionarguments ); paramet...
...ionarguments a mozistoragevaluearray holding the arguments passed in to the function. onfinal() this is called after all results have been obtained and notified via mozistorageaggregatefunction. the implementation should finish its calculations on the data, and return a result. note this callback is executed on the thread that the statement or trigger is executing on. if you use mozistorageconnection.executeasync() or, mozistoragestatement.executeasync() this callback will run on a different thread from the rest of your code. likewise, if you execute sql on a different thread, this callback will be executed on that thread. this callback should be reentrant if any of the above applies to your use of the storage apis! nsivariant onfinal() return value an nsivariant this is the return v...
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mozIStorageFunction
this is an interface that must be implemented by consumers. it allows consumers to add functions that are available to sql queries and triggers. there are a number of already defined functions provided by sqlite. objects implementing this interface can be registered with mozistorageconnection.createfunction(). storage/public/mozistoragefunction.idlscriptable please add a summary to this article. ...
...istoragefunction.idlscriptable please add a summary to this article. last changed in gecko 1.9.1.4 (firefox 3.5.4) inherits from: nsisupports method overview nsivariant onfunctioncall(in mozistoragevaluearray afunctionarguments); methods onfunctioncall() the implementation of the function. this is called by the database engine when the function registered with mozistorageconnection.createfunction() is used in an executing sql statement or trigger. note this callback is executed on the thread that the statement or trigger is executing on. if you use mozistorageconnection.executeasync() or, mozistoragestatement.executeasync() this callback will run on a different thread from the rest of your code. likewise, if you execute sql on a different thread, this callback will be...
...to your use of the storage apis! nsivariant onfunctioncall( in mozistoragevaluearray afunctionarguments ); parameters afunctionarguments a mozistoragevaluearray holding the arguments passed in to the function. return value an nsivariant this is the return value of the function. sample code both of the following code samples assume that the variable dbconn is an opened mozistorageconnection. javascript starting in gecko 1.9.1.4 (firefox 3.0.15), you can directly pass your function into the mozistorageconnection method mozistorageconnection, like this: dbconn.createfunction("square", 1, function(aarguments) { let value = aarguments.getint32(0); return value * value; }); // run some query that uses the function. let stmt = dbconn.createstatement("select square(value) fr...
...And 3 more matches

mozIStorageStatement
storage/public/mozistoragestatement.idlscriptable this interface lets you create and execute sql statements on a mozistorageconnection. inherits from: mozistoragevaluearray last changed in gecko 1.9.2 (firefox 3.6 / thunderbird 3.1 / fennec 1.0) for an introduction on how to use this interface, see the storage overview document. ...
... storage/public/mozistoragestatement.idlscriptable this interface lets you create and execute sql statements on a mozistorageconnection. inherits from: mozistoragevaluearray last changed in gecko 1.9.2 (firefox 3.6 / thunderbird 3.1 / fennec 1.0) for an introduction on how to use this interface, see the storage overview document. ...
...ublic/mozistoragestatement.idlscriptable this interface lets you create and execute sql statements on a mozistorageconnection. inherits from: mozistoragevaluearray last changed in gecko 1.9.2 (firefox 3.6 / thunderbird 3.1 / fennec 1.0) for an introduction on how to use this interface, see the storage overview document. ...
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MailNews fakeserver
to take into account a new handler. a handler will contain the following methods: <caption> handler methods </caption> name arguments returns notes [command] rest of sent line server's response the name is normalized to be uppercase. onerror command, rest of sent line server's response called if handler does not define the command function. onstartup none server's response called when a connection is made. onmultiline sent line server's response or nothing called when in multi-line mode. postcommand server object none called after every command. the server is smart about the responses and will normalize all occurrences of '\n' (but not '\r') to '\r\n' for you, as well as append the '\r\n' to the response if not present. it will also properly queue all messages sent in pipelining ...
... handler in handlers) { // this sets up the fake server var server = new nsmailserver(new handler(daemon)); // port to use. i tend to like using 1024 + default port number myself. // probably best to include as a constant somewhere. also, use something // larger than 1024 for best results. ...
...smailserver(new handler(daemon)); // port to use. i tend to like using 1024 + default port number myself. // probably best to include as a constant somewhere. also, use something // larger than 1024 for best results. server.start(port); // set up a nsimsgincomingserver locally localserver.someactionrequiringconnection(); server.performtest(); // nothing will be executed until the connection is closed // localserver.closecachedconnections() is generally a good way to do so server.resettest(); // set up second test server.performtest(); transaction = server.playtransaction(); // finished with tests server.stop(); } currently, fakeserver provides no means to keep a persistent connection past a test, requiring connections to be closed, possibly forcibly. alternativel...
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Network request details - Firefox Developer Tools
"name": "x-varnish", "value": "766019457, 417549316" } ] }, "request headers (665 b)": { "headers": [ { "name": "accept", "value": "*/*" }, { "name": "accept-encoding", "value": "gzip, deflate, br" }, { "name": "accept-language", "value": "en-us,en;q=0.5" }, { "name": "connection", "value": "keep-alive" }, { "name": "cookie", "value": "wmf-last-access=11-jun-2019; wmf-last-access-global=11-jun-2019; mwphp7seed=5c9; geoip=us:ny:port_jervis:41.38:-74.67:v4" }, { "name": "dnt", "value": "1" }, { "name": "host", "value": "en.wikipedia.org" }, { "name": "referer",...
...bug 1452715). params tab this tab displays the get parameters and post data of a request: response tab the complete content of the response. if the response is html, js, or css, it will be shown as text: if the response is json, it will be shown as an inspectable object: if the response is an image, the tab displays a preview: for network responses that are initiated by a websocket connection, the details pane shows any associated messages. for more information, see inspecting web sockets. cache tab if the response is cached (i.e. a 304), the cache tab displays details about that cached resource. these details include: last fetched: the date the resource was last fetched fetched count: the number of times in the current session that the resource has been fetched data size...
...ote: future versions will also show this information when entries in the network monitor timeline graph are moused over (see bug 1580493). request timing the request timing section breaks a network request down into the following subset of the stages defined in the http archive specification: name description blocked time spent in a queue waiting for a network connection. the browser imposes a limit on the number of simultaneous connections that can be made to a single server. in firefox this defaults to 6, but can be changed using the network.http.max-persistent-connections-per-server preference. if all connections are in use, the browser can't download more resources until a connection is released. dns resolution time taken to resolve a ...
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BaseAudioContext.createChannelMerger() - Web APIs
umber of channels in the input audio streams, which the output stream will contain; the default is 6 if this parameter is not specified. returns a channelmergernode. example the following example shows how you could separate a stereo track (say, a piece of music), and process the left and right channel differently. ...
... default is 6 if this parameter is not specified. returns a channelmergernode. example the following example shows how you could separate a stereo track (say, a piece of music), and process the left and right channel differently. to use them, you need to use the second and third parameters of the audionode.connect(audionode) method, which allow you to specify both the index of the channel to connect from and the index of the channel to connect to. ...
... to use the second and third parameters of the audionode.connect(audionode) method, which allow you to specify both the index of the channel to connect from and the index of the channel to connect to. ...
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BaseAudioContext.createChannelSplitter() - Web APIs
of channels in the input audio stream that you want to output separately; the default is 6 if this parameter is not specified. returns a channelsplitternode. example the following simple example shows how you could separate a stereo track (say, a piece of music), and process the left and right channel differently. ...
...ault is 6 if this parameter is not specified. returns a channelsplitternode. example the following simple example shows how you could separate a stereo track (say, a piece of music), and process the left and right channel differently. to use them, you need to use the second and third parameters of the audionode.connect(audionode) method, which allow you to specify the index of the channel to connect from and the index of the channel to connect to. ...
... need to use the second and third parameters of the audionode.connect(audionode) method, which allow you to specify the index of the channel to connect from and the index of the channel to connect to. ...
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ChannelMergerNode - Web APIs
instance. properties no specific property; inherits properties from its parent, audionode. methods no specific method; inherits methods from its parent, audionode. example the following example shows how you could separate a stereo track (say, a piece of music), and process the left and right channel differently. ...
...onode. methods no specific method; inherits methods from its parent, audionode. example the following example shows how you could separate a stereo track (say, a piece of music), and process the left and right channel differently. to use them, you need to use the second and third parameters of the audionode.connect(audionode) method, which allow you to specify both the index of the channel to connect from and the index of the channel to connect to. ...
... to use the second and third parameters of the audionode.connect(audionode) method, which allow you to specify both the index of the channel to connect from and the index of the channel to connect to. ...
...And 3 more matches

ChannelSplitterNode - Web APIs
e. properties no specific property; inherits properties from its parent, audionode. methods no specific method; inherits methods from its parent, audionode. example the following simple example shows how you could separate a stereo track (say, a piece of music), and process the left and right channel differently. ...
...ode. methods no specific method; inherits methods from its parent, audionode. example the following simple example shows how you could separate a stereo track (say, a piece of music), and process the left and right channel differently. to use them, you need to use the second and third parameters of the audionode.connect(audionode) method, which allow you to specify the index of the channel to connect from and the index of the channel to connect to. ...
... need to use the second and third parameters of the audionode.connect(audionode) method, which allow you to specify the index of the channel to connect from and the index of the channel to connect to. ...
...And 3 more matches

IDBDatabaseSync - Web APIs
important: the synchronous version of the indexeddb api was originally intended for use only with web workers, and was eventually removed from the spec because its need was questionable. it may however be reintroduced in the future if there is enough demand from web developers. the databasesync interface in the indexeddb api represents a synchronous connection to a database. method overview idbobjectstoresync createobjectstore (in domstring name, in domstring keypath, in optional boolean autoincrement) raises (idbdatabaseexception); idbobjectstoresync openobjectstore (in domstring name, in optional unsigned short mode) raises (idbdatabaseexception); void removeobjectstore (in domstring storename) raises (idbdatabaseexception); void setversion (in domst...
...has the null value when the database is first created. methods createobjectstore() creates and re...
...sion (in domstring version); idbtransactionsync transaction (in optional domstringlist storenames, in optional unsigned int timeout) raises (idbdatabaseexception); attributes attribute type description description readonly domstring the human-readable description of the connected database. name readonly domstring the name of the connected database. objectstores readonly domstringlist the names of the object stores that exist in the connected database. version readonly domstring the version of the connected database. has the null value when the database is first created. methods createobjectstore() creates and returns a new object store with the given name in the connected database. idb...
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PerformanceTiming - Web APIs
nse has been received. if there is no redirect, or if one of the redirects is not of the same origin, the value returned is 0. performancetiming.fetchstart read only when the browser is ready to fetch the document using an http request. this moment is before the check to any application cache. performancetiming.domainlookupstart read only when the domain lookup starts. if a persistent connection is used, or the information is stored in a cache or a local resource, the value will be the same as performancetiming.fetchstart. performancetiming.domainlookupend read only when the domain lookup is finished. if a persistent connection is used, or the information is stored in a cache or a local resource, the value will be the same as performancetiming.fetchstart. performancetiming.c...
...e or a local resource, the value will be the same as performancetiming.fetchstart. performancetiming.domainlookupend read only when the domain lookup is finished. if a persistent connection is used, or the information is stored in a cache or a local resource, the value will be the same as performancetiming.fetchstart. performancetiming.connectstart read only when the request to open a connection is sent to the network. if the transport layer reports an error and the connection establishment is started again, the last connection establishment start time is given. if a persistent connection is used, the value will be the same as performancetiming.fetchstart. performancetiming.connectend read only when the connection is opened network. if the transport layer reports an error and th...
...n is sent to the network. if the transport layer reports an error and the connection establishment is started again, the last connection establishment start time is given. if a persistent connection is used, the value will be the same as performancetiming.fetchstart. performancetiming.connectend read only when the connection is opened network. if the transport layer reports an error and the connection establishment is started again, the last connection establishment end time is given. if a persistent connection is used, the value will be the same as performancetiming.fetchstart. a connection is considered as opened when all secure connection handshake, or socks authentication, is terminated. ...
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RTCIceServers.urls - Web APIs
ceserverurl | [ url1, ..., urln ], username: "webrtc", // optional credential: "turnpassword" // optional }; iceservers.push(iceserver); the value of this property may be specified as a single url or as an array of multiple urls. examples let's look a few examples of varying complexity. a single ice server this example creates a new rtcpeerconnection which will use a stun server at stunserver.example.org to negotiate connections. mypeerconnection = new rtcpeerconnection({ iceservers: [ { urls: "stun:stunserver.example.org" } ] }); notice that only the urls property is provided; the stun server doesn't require authentication, so this is all that's needed. a single ice server with authentication the second example creat...
...se a stun server at stunserver.example.org to negotiate connections. mypeerconnection = new rtcpeerconnection({ iceservers: [ { urls: "stun:stunserver.example.org" } ] }); notice that only the urls property is provided; the stun server doesn't require authentication, so this is all that's needed. a single ice server with authentication the second example creates a new rtcpeerconnection which will use a turn server at turnserver.example.org to negotiate connections. logging into the turn server will use the username "webrtc" and the creative password "turnpassword". ...
...at only the urls property is provided; the stun server doesn't require authentication, so this is all that's needed. a single ice server with authentication the second example creates a new rtcpeerconnection which will use a turn server at turnserver.example.org to negotiate connections. logging into the turn server will use the username "webrtc" and the creative password "turnpassword". mypeerconnection = new rtcpeerconnection({ iceservers: [ { urls: "turn:turnserver.example.org", username: "webrtc", credential: "turnpassword" } ] }); a single ice server with multiple urls the next example creates a new rtcpeerconnection which will use a single turn server which has multiple urls. this is useful if the server is, for example, available both on "turn" and "turns...
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RTCIceTransport - Web APIs
properties the rtcicetransport interface inherits properties from its parent, eventtarget. it also offers the following properties: component read only the ice component being used by the transport. the value is one of the strings from the rtcicetransport enumerated type: "rtp" or "rtsp". ...
...domstring whose value is one of the members of the rtcicerole enumerated type: "controlling" or "controlled"; this indicates whether the ice agent is the one that makes the final decision as to the candidate pair to use or not. state read only a domstring indicating what the current state of the ice agent is. the value of state can be used to determine whether the ice agent has made an initial connection using a viable candidate pair ("connected"), made its final selection of candidate pairs ("completed"), or in an error state ("failed"), among other states. see the rtcicetransportstate enumerated type for a complete list of states. methods also includes methods from eventtarget, the parent interface. getlocalcandidates() returns an array of rtcicecandidate objects, each describing one ...
... type for a complete list of states. methods also includes methods from eventtarget, the parent interface. getlocalcandidates() returns an array of rtcicecandidate objects, each describing one of the ice candidates that have been gathered so far for the local device. these are the same candidates which have already been sent to the remote peer by sending an icecandidate event to the rtcpeerconnection for transmission. getlocalparameters() returns a rtciceparameters object describing the ice parameters established by a call to the rtcpeerconnection.setlocaldescription() method. returns null if parameters have not yet been received. getremotecandidates() returns an array of rtcicecandidate objects, one for each of the remote device's ice candidates that have been received by the local en...
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RTCOfferOptions.iceRestart - Web APIs
the icerestart property of the rtcofferoptions dictionary is a boolean value which, when true, tells the rtcpeerconnection to start ice renegotiation. note: rather than manually creating and submitting an offer with icerestart set to true, you should consider calling the rtcpeerconnection method restartice() instead. syntax var options = { icerestart: trueorfalse }; value a boolean value indicating whether or not the rtcpeerconnection should generate new values for the connection's ice-ufrag and ice-pwd values, which will trigger ice renegotiation on the next message sent to the remote peer. ...
...e, you should consider calling the rtcpeerconnection method restartice() instead. syntax var options = { icerestart: trueorfalse }; value a boolean value indicating whether or not the rtcpeerconnection should generate new values for the connection's ice-ufrag and ice-pwd values, which will trigger ice renegotiation on the next message sent to the remote peer. usage notes when the rtcpeerconnection object's ice connection state changes to failed, you should try to trigger an ice restart. you should ideally do this by calling the rtcpeerconnection's restartice() method, if it's available. ...
...tes when the rtcpeerconnection object's ice connection state changes to failed, you should try to trigger an ice restart. you should ideally do this by calling the rtcpeerconnection's restartice() method, if it's available. fundamentally, this renegotiation is triggered by generating and using new values for the ice username fragment ("ufrag")}} example this example shows a handler for the iceconnectionstatechange event. it watches for the ice connection state to transition to "failed", which indicates that an ice restart should be tried in order to attempt to bring the connection back up. ...
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RTCStatsType - Web APIs
rings which define the type of statistics reported in a record found in the rtcstatsreport object. this type determines which of the rtcstats-based dictionaries the record is based upon. values candidate-pair an rtcicecandidatepairstats object providing statistics related to an rtcicetransport. candidate pairs other than the currently active pair for the transport are deleted when the rtcpeerconnection changes its rtcpeerconnection.icegatheringstate to new during an ice restart. the active candidate pair is deleted after the transport switches to another candidate pair; this change cannot be detected otherwise. certificate an rtccertificatestats object providing statistics related to a certificate being used by an rtcicetransport. codec an rtccodecstats object containing statistics about...
...e active candidate pair is deleted after the transport switches to another candidate pair; this change cannot be detected otherwise. certificate an rtccertificatestats object providing statistics related to a certificate being used by an rtcicetransport. codec an rtccodecstats object containing statistics about a codec currently being used by rtp streams to send or receive data for the rtcpeerconnection. csrc an rtccontributingsourcestats object which contains statistics related to a contributing source (csrc) that contributed to an inbound rtp stream. data-channel an rtcdatachannelstats object which contains statistics about each rtcdatachannel on the connection. inbound-rtp an rtcinboundrtpstreamstats object providing statistics about inbound data being received from remote peers. sin...
... local-candidate an rtcicecandidatestats object giving statistics about an ice local candidate; these candidates are found in the output from rtcicetransport.getlocalcandidates(). outbound-rtp the report is an rtcoutboundrtpstreamstats object providing statistics based on the local peer's outgoing data being sent to its peers. ...
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Using the Resource Timing API - Web APIs
ore details about the interfaces, including examples, see each interface's reference page and the references in the see also section. a live version of the examples is available on github, as is the source code. pull requests and bug reports are welcome. resource loading phases an application can get timestamps for the various phases of resource loading such as redirection, dns lookup, and tcp connection setup. those phases and their property names are illustrated in figure 1. figure 1. resource timing properties an application developer can use the property values to calculate the length of time a phase takes and that information can help diagnose performance issues. timing resource loading phases the following example illustrates using the resource timing properties to calculate the amo...
...he property values to calculate the length of time a phase takes and that information can help diagnose performance issues. timing resource loading phases the following example illustrates using the resource timing properties to calculate the amount of time the following phases take: redirection (redirectstart and redirectend ), dns lookup (domainlookupstart and domainlookupend), tcp handshake (connectstart and connectend), and response (responsestart and responseend). this example also calculates the time from the start of the fetch and request start phases (fetchstart and requeststart, respectively), until the response has ended (responseend). this timing data provides a detailed profile of the resource loading phases and this data can be used to help identify performance bottlenecks. functi...
...es.length; i++) { console.log("== resource[" + i + "] - " + resources[i].name); // redirect time var t = resources[i].redirectend - resources[i].redirectstart; console.log("... redirect time = " + t); // dns time t = resources[i].domainlookupend - resources[i].domainlookupstart; console.log("... dns lookup time = " + t); // tcp handshake time t = resources[i].connectend - resources[i].connectstart; console.log("... tcp time = " + t); // secure connection time t = (resources[i].secureconnectionstart > 0) ? (resources[i].connectend - resources[i].secureconnectionstart) : "0"; console.log("... secure connection time = " + t); // response time t = resources[i].responseend - resources[i].responsestart; console.log("... response time =...
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Example and tutorial: Simple synth keyboard - Web APIs
ion. <div class="settingsbar"> <div class="left"> <span>volume: </span> <input type="range" min="0.0" max="1.0" step="0.01" value="0.5" list="volumes" name="volume"> <datalist id="volumes"> <option value="0.0" label="mute"> <option value="1.0" label="100%"> </datalist> </div> we specify a default value of 0.5, and we provide a <datalist> element which is connected to the range using the name attribute to find an option list whose id matches; in this case, the data set is named "volume". this lets us provide a set of common values and special strings which the browser may optionally choose to display in some fashion; we provide names for the values 0.0 ("mute") and 1.0 ("100%"). the waveform picker on the right side of the settings bar, we place a label...
...innode = null; audiocontext is set to reference the global audiocontext object (or webkitaudiocontext if necessary). osclist is set up to be ready to contain a list of all currently-playing oscillators. it starts off empty, since there are none playing yet. mastergainnode is set to null; during the setup process, it will be configured to contain a gainnode which all playing oscillators will connect to and play through to allow the overall volume to be controlled using a single slider control. let keyboard = document.queryselector(".keyboard"); let wavepicker = document.queryselector("select[name='waveform']"); let volumecontrol = document.queryselector("input[name='volume']"); references to elements we'll need access to are obtained: keyboard is the container element into which the k...
... => concat(e, typeof k === 'string' && isenumerable(o, k) ? [[k, o[k]]] : []), []); }; } building the keyboard the setup() function is responsible for building the keyboard and preparing the app to play music. function setup() { notefreq = createnotetable(); volumecontrol.addeventlistener("change", changevolume, false); mastergainnode = audiocontext.creategain(); mastergainnode.connect(audiocontext.destination); mastergainnode.gain.value = volumecontrol.value; // create the keys; skip any that are sharp or flat; for // our purposes we don't need them. each octave is inserted // into a <div> of class "octave". notefreq.foreach(function(keys, idx) { let keylist = object.entries(keys); let octaveelem = document.createelement("div"); octaveelem.classname = "...
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Window - Web APIs
bient light levels changes window.ondevicemotion called if accelerometer detects a change (for mobile devices) window.ondeviceorientation called when the orientation is changed (for mobile devices) window.ondeviceorientationabsolute an event handler property for any device orientation changes. window.ondeviceproximity an event handler property for device proximity event window.ongamepadconnected represents an event handler that will run when a gamepad is connected (when the gamepadconnected event fires). window.ongamepaddisconnected represents an event handler that will run when a gamepad is disconnected (when the gamepaddisconnected event fires). window.onmozbeforepaint an event handler property for the mozbeforepaint event, which is sent before repainting the window if the event...
...y mouse button is pressed. globaleventhandlers.onmousemove called continously when the mouse is moved inside the window. globaleventhandlers.onmouseout called when the pointer leaves the window. globaleventhandlers.onmouseover called when the pointer enters the window globaleventhandlers.onmouseup called when any mouse button is released windoweventhandlers.onoffline called when network connection is lost. see offline event. windoweventhandlers.ononline called when network connection is established. see online event. windoweventhandlers.onpagehide called when the user navigates away from the page, before the onunload event. see pagehide event. windoweventhandlers.onpageshow called after all resources and the dom are fully loaded. see pageshow event. windoweventhandlers.onpopstate...
...hanges. copy fired when the user initiates a copy action through the browser's user interface. also available via the oncopy property. cut fired when the user initiates a cut action through the browser's user interface. also available via the oncut property. paste fired when the user initiates a paste action through the browser's user interface. also available via the onpaste property. connection events offline fired when the browser has lost access to the network and the value of navigator.online has switched to false. also available via the onoffline property. online fired when the browser has gained access to the network and the value of navigator.online has switched to true. also available via the ononline property. focus events blur fired when an element has lost fo...
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Understanding latency - Web Performance
latency is the time it takes for a packet of data to travel from source to a destination. in terms of performance optimization, it's important to optimize to reduce causes of lacency and to test site performance emulating high latency to optimizer for users with lousy connections. this article explains what latency is, how it impacts performance, how to measure latency, and how to reduce it. ...
... reduce it. what is latency? latency is generally considered to be the amount of time it takes from when a request is made by the user to the time it takes for the response to get back to that user. on a first request, for the first 14kb bytes, latency is longer because it includes a dns lookup, a tcp handshake, the secure tls negotiation. subsequent requests will have less latency because the connection to the server is already set. latency describes the amount of delay on a network or internet connection. low latency implies that there are no or almost no delays. high latency implies that there are many delays. one of the main aims of improving performance is to reduce latency. the latency associated with a single asset, especially a basic html page, may seem trivial. but websites generall...
... one of the main aims of improving performance is to reduce latency. the latency associated with a single asset, especially a basic html page, may seem trivial. but websites generally involve multiple requests: the html includes requests for multiple css, scripts, and media files. the greater the number and size of these requests, the greater the impact of high latency on user experience. on a connection with low latency, requested resources will appear almost immediately. on a connection with high latency, there will be a discernible delay between the time that a request is sent, and the resources are returned. we can determine the amount of latency by measuring the speed with which the data moves from one network location to another. latency can be measured one way, for example, the amount ...
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Using dns-prefetch - Web Performance
target a user tries to follow. why use dns-prefetch? when a browser requests a resource from a (third party) server, that cross-origin’s domain name must be resolved to an ip address before the browser can issue the request. this process is known as dns resolution. while dns caching can help to reduce this latency, dns resolution can add significant latency to requests. for websites that open connections to many third parties, this latency can significantly reduce loading performance. dns-prefetch helps developers mask dns resolution latency. the html <link> element offers this functionality by way of a rel attribute value of dns-prefetch. the cross-origin domain is then specified in the href attribute: syntax <link rel="dns-prefetch" href="https://fonts.gstatic.com/" > examples <html> ...
...d using it to point to your site or domain. this is because the ip behind your site’s domain will have already been resolved by the time the browser sees the hint. second, it’s also possible to specify dns-prefetch (and other resources hints) as an http header by using the http link field: link: <https://fonts.gstatic.com/>; rel=dns-prefetch third, consider pairing dns-prefetch with the preconnect hint. while dns-prefetch only performs a dns lookup, preconnect establishes a connection to a server. this process includes dns resolution, as well as establishing the tcp connection, and performing the tls handshake—if a site is served over https. combining the two provides an opportunity to further reduce the perceived latency of cross-origin requests. you can safely use them together like so...
...prefetch only performs a dns lookup, preconnect establishes a connection to a server. this process includes dns resolution, as well as establishing the tcp connection, and performing the tls handshake—if a site is served over https. combining the two provides an opportunity to further reduce the perceived latency of cross-origin requests. you can safely use them together like so: <link rel="preconnect" href="https://fonts.gstatic.com/" crossorigin> <link rel="dns-prefetch" href="https://fonts.gstatic.com/"> note: if a page needs to make connections to many third-party domains, preconnecting them all is counterproductive. the preconnect hint is best used for only the most critical connections. for the others, just use <link rel="dns-prefetch"> to save time on the first step — the dns looku...
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<metadata> - SVG: Scalable Vector Graphics
tes global attributes core attributes global event attributes specific attributes none dom interface this element implements the svgmetadataelement interface. ...
... global event attributes specific attributes none dom interface this element implements the svgmetadataelement interface. ...
...is element implements the svgmetadataelement interface. ...
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MCD, Mission Control Desktop, AKA AutoConfig - Archive of obsolete content
.org/thunderbird...oconfiguration . it's mission is to enable completely automatic configuration of mozilla's apps preferences based on users properties either retrieved from system environement variables or on an organisation ldap directory. situation int-evry manages about 3000 users (mostly students) who share computers in labs and "self service" computer rooms. ...
...choosing mozilla products allow us to use the same apps while running either windows or linux systems (i suspect mac osx would be fine too). instead of configuring end user individual preferences files (~/.mozilla/default/randomdir/prefs.js) we now use a centralized default set of preferences. ...
...ker_mode", "0"); lockpref("mail.identity.id1.organization", "int evry france"); lockpref("mail.identity.id1.overrideglobal_pref", true); lockpref("mail.identity.id1.reply_to", ""); //imap lockpref("mail.server.server2.hostname", "imap-int.int-evry.fr"); lockpref("mail.server.server2.issecure", true); lockpref("mail.server.server2.login_at_startup", true); lockpref("mail.server.server2.max_cached_connections", 5); //lockpref("mail.server.server2.name", "jehan.procaccia@int-evry.fr"); lockpref("mail.server.server2.type", "imap"); lockpref("mail.server.server2.username", env_user); //smtp lockpref("mail.identity.id1.smtpserver", "smtp1"); lockpref("mail.identity.id1.stationery_folder", "imap://" + env_user + "@imap-int.int-evry.fr/templates"); lockpref("mail.identity.id1.tmpl_folder_picker_mode", ...
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Index - Archive of obsolete content
at the queries use syntax that is specific to xml. 952 textbox (xpfe autocomplete) xul elements, xul reference this element is created by setting the type attribute of a textbox to autocomplete. it is used to create a textbox with a popup containing a list of possible completions for what the user has started to type. ...
...these applications are easily customized with alternative text, graphics, and layout so they can be readily branded or localized for various markets. web developers already familiar with dynamic html (dhtml) will learn xul quickly and can start building applications right away. ...
...these applications are easily customized with alternative text, graphics, and layout so they can be readily branded or localized for various markets. web developers already familiar with dynamic html (dhtml) will learn xul quickly and can start building applications right away. ...
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Gecko Compatibility Handbook - Archive of obsolete content
you're using netscape 4.x and microsoft proprietary technologies, see using web standards in your web pages for a quick tutorial on what's different in gecko. aol or compuserve problems even if your site works on netscape 7.x, it is important to test your site in aol for macos and compuserve 7 to check for browser detection and network issues. ...
...see webmaster@aol for further information. ...
...see webmaster@aol for further information. ...
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Unconventional controls - Game development
to visit the leapjs repository on github to learn about the javascript client for the leap motion controller and read the documentation there. if all else fails, there's also a gallery of working examples you can look at. to get the leap motion working on your computer you have to first install it by following the steps at leapmotion.com/setup. when everything is installed and the controller is connected to your computer we can proceed with implementing support in our little demo. first, we add a <script> tag with the url pointing at this file, and add <div id="output"></div> just before the closing </body> tag for outputting diagnostic information. we will need a few helper variables for our code to work — one for the purpose of calculating the degrees from radians, two for holding the hori...
...; the min and max values are the minimum and the maximum distances respectively between which the sensor can detect the exact proximity value. all three are calculated in centimetres. note: see the deviceproximityevent reference page for more details. ...
...ut connecting real-world, conductive objects to a computer and using them as touch interfaces. check out the banana piano video, and be sure to visit the quick start guide for all the needed info. there's even a cylon.js-supported makey button functionality inspired by the makey makey board, so you can use the popular cylon robotics framework for your experiments with arduino or raspberry pi. ...
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Client-Server Overview - Learn web development
ion about a specific resource without getting the body like get would. you might for example use a head request to find out the last time a resource was updated, and then only use the (more "expensive") get request to download the resource if it has changed. put: update an existing resource (or create a new one if it doesn't exist). delete: delete the specified resource. trace, options, connect, patch: these verbs are for less common/advanced tasks, so we won't cover them here. additional information can be encoded with the request (for example, html form data). information can be encoded as: url parameters: get requests encode data in the url sent to the server by adding name/value pairs onto the end of it — for example http://mysite.com?name=fred&age=11. you always have ...
...the first part is called the header, and contains useful information about the request, in the same way that an html head contains useful information about an html document (but not the actual content itself, which is in the body): get https://developer.mozilla.org/search?q=client+server+overview&topic=apps&topic=html&topic=css&topic=js&topic=api&topic=webdev http/1.1 host: developer.mozilla.org connection: keep-alive pragma: no-cache cache-control: no-cache upgrade-insecure-requests: 1 user-agent: mozilla/5.0 (windows nt 10.0; wow64) applewebkit/537.36 (khtml, like gecko) chrome/52.0.2743.116 safari/537.36 accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 referer: https://developer.mozilla.org/ accept-encoding: gzip, deflate, sdch, br accept-charset: iso-8859-1,...
...e head also tells us how big it is (content-length: 41823). at the end of the message we see the body content — which contains the actual html returned by the request. ...
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Communicating with frame scripts
this takes two parameters: the name of the message and a listener function. the listener will be passed a message object whose data property is the message payload: // frame script function handlemessagefromchrome(message) { var payload = message.data.details; // "some more details" } addmessagelistener("my-addon@me.org:message-from-chrome", handlemessagefromchrome); message-manager-disconnect if you're using a message manager to communicate with a script that may be running in a different process, you can listen for the message-manager-disconnect observer notification to know when the message manager has disconnected from the other end of the conversation, so you can stop sending it messages or expecting to receive messages. for example, suppose we load a script into the current <br...
...wser> on some event, and keep the browser message manager in an array, so we can send it messages: var messagemanagers = []; ... ...
... in an array, so we can send it messages: var messagemanagers = []; ... ...
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Getting Started with Chat
20, mozilla moved away from irc to matrix for its public channels, the irc server was shut down. this page is being retained for historical and reference purposes. the general rules and etiquette are still useful for our new home. please see https://wiki.mozilla.org/matrix for up-to-date information. general rules and etiquette once you have your client set up (see software below) and are connected, there are some basic rules you should follow to ensure the most enjoyable and productive experience: as with all mozilla forums and events, agreeing to our community participation guidelines is a requirement for participation. try to keep messages as concise as possible. if you have something long to post, a code snippet for example, use paste.mozilla.org and paste the generated url in irc...
...m pst monday to friday, excluding us holidays. when asking a question, be patient. sometimes, it can take a few minutes for people to respond. posting a message like "help!" is not particularly helpful. asking a good question will result in a better experience for both you and the person trying to help. ...
...t can take a few minutes for people to respond. posting a message like "help!" is not particularly helpful. asking a good question will result in a better experience for both you and the person trying to help. relax and have fun! software there are several different applications which allow you to connect to irc networks. you will need to use the following information to configure the server connection: server: irc.mozilla.org port: 6667 (default) or 6697 (ssl) desktop clients desktop clients tens to allow the most detailed configuration. for example, you can connect using ssl or a non-secure connection, and you can configure the client to automatically connect to a server and join a particular set of channels when you start the client. the following are some other options available t...
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PR_Accept
if unsuccessful, null. ...
... if unsuccessful, null. ...
...include <prio.h> prfiledesc* pr_accept( prfiledesc *fd, prnetaddr *addr, printervaltime timeout); parameters the function has the following parameters: fd a pointer to a prfiledesc object representing the rendezvous socket on which the caller is willing to accept new connections. addr a pointer to a structure of type prnetaddr. on output, this structure contains the address of the connecting entity. timeout a value of type printervaltime specifying the time limit for completion of the accept operation. returns the function returns one of the following values: upon successful acceptance of a connection, a pointer to a new prfiledesc structure representing the newly accepted connection. if unsuccessful, null. further information can be obtained by calling pr_geterror. des...
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PR_OpenTCPSocket
new tcp socket. can be pr_af_inet (ipv4), pr_af_inet6 (ipv6), or pr_af_local (unix domain, supported on posix systems only). returns the function returns one of the following values: upon successful completion, a pointer to the prfiledesc object created for the newly opened tcp socket. if the creation of a new tcp socket failed, null. ...
...s one of the following values: upon successful completion, a pointer to the prfiledesc object created for the newly opened tcp socket. if the creation of a new tcp socket failed, null. description tcp (transmission control protocol) is a connection-oriented, reliable byte-stream protocol of the tcp/ip protocol suite. pr_opentcpsocket creates a new tcp socket of the address family af. a tcp connection is established by a passive socket (the server) accepting a connection setup request from an active socket (the client). ...
...to receive data, one can call pr_read or pr_recv. to send data, one can call pr_write, pr_writev, pr_send, or pr_transmitfile. ...
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An overview of NSS Internals
r to granting validity to the certificate. in order to distinguish an ev certificate, cas will embed a policy oid in the certificate, and the browser is expected to verify that a trust chain permits the end entity (ee) certificate to make use of the policy. only the apis of the newer libpkix engine are capable of performing a policy verification. ...
...rtificate to make use of the policy. only the apis of the newer libpkix engine are capable of performing a policy verification. that's a good opportunity to talk about ssl/tls connections to servers in general (not just ev, not just websites). whenever this document mentions ssl, it refers to either ssl or tls. (tls is a newer version of ssl with enhanced features.) when establishing an ssl connection to a server, (at least) a server certificate (and its trust chain) is exchanged from the server to the client (e.g., the browser), and the client verifies that the certificate can be verified (including matching the name of the expected destination server). another part of the handshake between both parties is a key exchange. because public key encryption is more expensive (more calculations r...
...than symmetric encryption (where both parties use the same key), a key agreement protocol will be executed, where the public and private keys are used to proof and verify the exchanged initial information. once the key agreement is done, a symmetric encryption will be used (until a potential re-handshake on an existing channel). the combination of the hash and encryption algorithms used for a ssl connection is called a cipher suite. nss ships with a set of cipher suites that it supports at a technical level. in addition, nss ships with a default policy that defines which cipher suites are enabled by default. an application is able to modify the policy used at program runtime, by using function calls to modify the set of enabled cipher suites. if a programmer wants to influence how nss verif...
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HTTP delegation
it does so in a blocking fashion, and also directly to the responder, ignoring any proxy the application may wish to use. this causes ocsp requests to fail if the network environment requires the use of a proxy. there are two possible solutions to this limitation. instead of improving the simple http client in nss, the nss team has decided to provide an nss api to register application callback functions. if provided by the application, nss will use the registered http client for querying an oscp responder. this nss feature is currently targeted to first appear in nss version 3.11.1. ...
...es a simple function that accepts the uri and data to be sent, and returns the result data. but there is no such simple interface. the api should allow nss to use the http client either asynchronously or synchronously. in addition, during an application session with ocsp enabled, a large number of ocsp requests might have to be sent. therefore the api should allow for keep-alive (persistent) http connections. http uris consist of host:port and a path, e.g. http://ocsp.provider.com:80/cgi-bin/ocsp-responder if nss needs to access a http server, it will request that an "http server session object" be created (sec_httpserver_createsessionfcn). the http server session object is logically associated with host and port destination information, in our example this is "host ocsp.provider.com port 80". th...
...0/cgi-bin/ocsp-responder if nss needs to access a http server, it will request that an "http server session object" be created (sec_httpserver_createsessionfcn). the http server session object is logically associated with host and port destination information, in our example this is "host ocsp.provider.com port 80". the object may be used by the application to associate it with a physical network connection. (nss might choose to be smart, and only create a single http server session object for each server encountered. nss might also choose to be simple, and request multiple objects for the same server. the application must support both strategies.) the logical http server session object is expected to remain valid until explicitly destroyed (sec_httpserver_freesessionfcn). should the application ...
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HTTP delegation
it does so in a blocking fashion, and also directly to the responder, ignoring any proxy the application may wish to use. this causes ocsp requests to fail if the network environment requires the use of a proxy. there are two possible solutions to this limitation. instead of improving the simple http client in nss, the nss team has decided to provide an nss api to register application callback functions. if provided by the application, nss will use the registered http client for querying an oscp responder. this nss feature is currently targeted to first appear in nss version 3.11.1. ...
...es a simple function that accepts the uri and data to be sent, and returns the result data. but there is no such simple interface. the api should allow nss to use the http client either asynchronously or synchronously. in addition, during an application session with ocsp enabled, a large number of ocsp requests might have to be sent. therefore the api should allow for keep-alive (persistent) http connections. http uris consist of host:port and a path, e.g. http://ocsp.provider.com:80/cgi-bin/ocsp-responder if nss needs to access a http server, it will request that an "http server session object" be created (sec_httpserver_createsessionfcn). the http server session object is logically associated with host and port destination information, in our example this is "host ocsp.provider.com port 80". th...
...0/cgi-bin/ocsp-responder if nss needs to access a http server, it will request that an "http server session object" be created (sec_httpserver_createsessionfcn). the http server session object is logically associated with host and port destination information, in our example this is "host ocsp.provider.com port 80". the object may be used by the application to associate it with a physical network connection. (nss might choose to be smart, and only create a single http server session object for each server encountered. nss might also choose to be simple, and request multiple objects for the same server. the application must support both strategies.) the logical http server session object is expected to remain valid until explicitly destroyed (sec_httpserver_freesessionfcn). should the application ...
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sslerr.html
as received a certificate from the local system, and has determined that the certificate has been revoked. ssl_error_expired_cert_alert -12269 "ssl peer rejected your certificate as expired." the remote system has received a certificate from the local system, and has determined that the certificate has expired. ssl_error_ssl_disabled -12268 "cannot connect: ssl is disabled." the local socket is configured in such a way that it cannot use any of the ssl cipher suites. possible causes include: (a) both ssl2 and ssl3 are disabled, (b) all the individual ssl cipher suites are disabled, or (c) the socket is configured to handshake as a server, but the certificate associated with that socket is inappropriate for the key exchange algorithm selec...
...n such a way that it cannot use any of the ssl cipher suites. possible causes include: (a) both ssl2 and ssl3 are disabled, (b) all the individual ssl cipher suites are disabled, or (c) the socket is configured to handshake as a server, but the certificate associated with that socket is inappropriate for the key exchange algorithm selected. ssl_error_fortezza_pqg -12267 "cannot connect: ssl peer is in another fortezza domain." the local system and the remote system are in different fortezza domains. they must be in the same domain to communicate. ssl_error_unknown_cipher_suite -12266 "an unknown ssl cipher suite has been requested." the application has attempted to configure ssl to use an unknown cipher suite. ssl_error_no_cip...
...peer system has a flawed implementation of ssl, and is violating the ssl specification. ssl_error_tx_record_too_long -12262 "ssl attempted to send a record that exceeded the maximum permissible length." this error should never occur. if it does, it indicates a flaw in the nss ssl library. ssl_error_close_notify_alert -12230 "ssl peer has closed this connection." the local socket received an ssl3 alert record from the remote peer, reporting that the remote peer has chosen to end the connection. the receipt of this alert is an error only if it occurs while a handshake is in progress. ssl_error_pub_key_size_limit_exceeded -12210 "ssl server attempted to use domestic-grade public key with export cipher suite." on...
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History Service Design
ice.idl) is the core of places, every other places service depends on it to correctly work, so it gets always initialized at application startup. actual tasks executed by this service include: database creation, maintenance and initialization: all services rely on a common shared database called places.sqlite. history service checks for database existance and coherence, and initializes the connection through the storage service. history management: provides basic and advanced apis to store and modify visits and page details. relevance calculation: maintain and expire frecency values for pages. history expiration: expire old visits and invalid informations from the database. queries creation: allows the creation for complex queries. queries results maintenance:...
...y values for pages. history expiration: expire old visits and invalid informations from the database. queries creation: allows the creation for complex queries. queries results maintenance: allows easy access to queries results. charset for pages: allows setting and reading charset for each page. database maintenance at startup the service creates an exclusive storage connection to places.sqlite, the exclusive locking is needed for both a perf gain and data-safety. in case the database is missing a new one is created, if instead the database exists but the connection to it fails due to database corruption, the corrupt database is moved away and a new one is created. in both cases an implementer can know what did happen at startup and act accordingly (maybe restoring a...
...schema version is upgraded every time a change is made to the database schema, history service will eventually upgrade the database, moving and fixing its datas accordingly. ...
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Language bindings
other languages for which xpcom bindings exist to access these modules. since the xpcom layer itself is written in c/c++, its api can be accessed out-of-the-box using c or c++. in order to allow any other language to use the xpcom api, a bridging layer is required. ...
...ther language to use the xpcom api, a bridging layer is required. the following bridging layers are currently available: components objectthe components object is the object through which xpconnect functionality is reflected into javascript. ...
...ue or false respectively.components.lastresultcomponents.managercomponents.manager is a convenience reflection of the global native component manager service. the scriptable methods on the nsicomponentmanager interface can be called directly on this object.components.resultscomponents.results is a read-only object whose properties are the names listed as the first parameters of the macros in js/xpconnect/src/xpc.msg (also at table of errors), with the value of each corresponding to that constant's value.components.returncodecomponents.stackcomponents.stack is a read only property of type nsistackframe (idl definition) that represents a snapshot of the current javascript callstack. this can be used for various diagnostic purposes.components.utilscomponents.utils is a collection of various useful x...
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mozIStorageProgressHandler
the mozistorageprogresshandler interface lets storage consumers receive callbacks during the execution of sqlite requests. storage/public/mozistorageprogresshandler.idlscriptable please add a summary to this article. ...
... the mozistorageprogresshandler interface lets storage consumers receive callbacks during the execution of sqlite requests. storage/public/mozistorageprogresshandler.idlscriptable please add a summary to this article. ...
...1.8 (firefox 1.5 / thunderbird 1.5 / seamonkey 1.0) inherits from: nsisupports method overview boolean onprogress(in mozistorageconnection aconnection); methods onprogress() the onprogress() method is called periodically while an sqlite operation is ongoing. this allows you to monitor the progress and possibly display status information to the user. boolean onprogress( in mozistorageconnection aconnection ); parameters <tt>aconnection</tt> a mozistorageconnection connection indicating the connection for which the callback was invoked. return value return true to abort the request or false to allow it to continue. ...
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nsINetworkLinkService
for example, the link is down during dhcp configuration (unless there is another usable interface already configured). if the link status is not currently known, we generally assume that it is up. read only. linkstatusknown boolean this is set to true when we believe that islinkup is accurate. read only. ...
...s a service: var networklinkservice = components.classes["@mozilla.org/network/network-link-service;1"] .getservice(components.interfaces.nsinetworklinkservice); attributes attribute type description islinkup boolean this is set to true when the system is believed to have a usable network connection. the link is only up when network connections can be established. for example, the link is down during dhcp configuration (unless there is another usable interface already configured). if the link status is not currently known, we generally assume that it is up. read only. linkstatusknown boolean this is set to true when we believe that islinkup is accurate. read only. linktype unsigned long the type of ...
... be established. for example, the link is down during dhcp configuration (unless there is another usable interface already configured). if the link status is not currently known, we generally assume that it is up. read only. linkstatusknown boolean this is set to true when we believe that islinkup is accurate. read only. linktype unsigned long the type of network connection, one of the link_type_* constants. read only. note: as of gecko 8.0, all operating systems currently return link_type_unknown. android support was backed out due to perceived security concerns, see bug 691054. as of gecko 28.0 android support is available again, see bug 939680. constants constant value description link_type_unknown 0 ...
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nsIProtocolProxyService
exception ns_base_stream_would_block to indicate that it failed due to this flag being present. methods resolve() deprecated since gecko 18 this method has been removed in firefox 18. use resolveasync instead previous doc this method returns a nsiproxyinfo instance that identifies a proxy to be used for loading the given uri. otherwise, this method returns null indicating that a direct connection should be used. if this proxy is unavailable, getfailoverforproxy() may be called to determine the correct secondary proxy to be used. if the protocol handler for the given uri supports nsiproxiedprotocolhandler, then the nsiproxyinfo instance returned from resolve may be passed to the nsiproxiedprotocolhandler.newproxiedchannel() method to create a nsichannel to the given uri that uses th...
...nsiproxiedprotocolhandler. nsiproxyinfo resolve( in nsiuri auri, in unsigned long aflags ); parameters auri the uri to test. aflags a bit-wise combination of the resolve_ flags defined above. pass 0 to specify the default behavior. any additional bits that do not correspond to a resolve_ flag are reserved for future use. return value an nsiproxyinfo object or null for a direct connection. note: if pac is configured, and the pac file has not yet been loaded, then this method will return a nsiproxyinfo instance with a type of "unknown" to indicate to the consumer that asyncresolve should be used to wait for the pac file to finish loading. otherwise, the consumer may choose to treat the result as type "direct" if desired. see nsiproxiedprotocolhandler.newproxiedchannel(). asyn...
...ation. if canceled, the cancellation status (areason) will be forwarded to the callback's nsiprotocolproxycallback.onproxyavailable() method via the astatus parameter. newproxyinfo() this method may be called to construct a nsiproxyinfo instance from the given parameters. this method may be useful in conjunction with nsisockettransportservice.createtransport() for creating, for example, a socks connection. nsiproxyinfo newproxyinfo( in acstring atype, in autf8string ahost, in long aport, in unsigned long aflags, in unsigned long afailovertimeout, in nsiproxyinfo afailoverproxy ); parameters atype the proxy type is a string value that identifies the proxy type. standard values are: "http" - specifies a http proxy "https" - specifies a https proxy "socks" - specifies a ...
...And 2 more matches

nsIRadioInterfaceLayer
llcallback(in nsirildatacallback callback); attributes attribute type description currentstate jsval read only. obsolete since gecko 13.0 microphonemuted bool radiostate jsval read only. ...
...back callback); attributes attribute type description currentstate jsval read only. obsolete since gecko 13.0 microphonemuted bool radiostate jsval read only. ...
...nce gecko 13.0 microphonemuted bool radiostate jsval read only. ...
...And 2 more matches

nsIServerSocket
netwerk/base/public/nsiserversocket.idlscriptable please add a summary to this article. last changed in gecko 1.6 inherits from: nsisupports implemented by: @mozilla.org/network/server-socket;1. ...
...se(); void asynclisten(in nsiserversocketlistener alistener); prnetaddr getaddress();native code only! attributes attribute type description port long returns the port of this server socket. read only. methods asynclisten() this method puts the server socket in the listening state. it will asynchronously listen for and accept client connections. the listener will be notified once for each client connection that is accepted. the listener's onsocketaccepted() method will be called on the same thread that called asynclisten() (the calling thread must have an nsieventtarget). the listener will be passed a reference to an already connected socket transport (nsisockettransport). see nsiserversocketlistener for more details. void asyncli...
...ed() method will be called on the same thread that called asynclisten() (the calling thread must have an nsieventtarget). the listener will be passed a reference to an already connected socket transport (nsisockettransport). see nsiserversocketlistener for more details. void asynclisten( in nsiserversocketlistener alistener ); parameters alistener the listener to be notified when client connections are accepted. close() this method closes a server socket. this does not affect already connected client sockets (i.e., the nsisockettransport instances created from this server socket). this will cause the onstoplistening event to asynchronously fire with a status of ns_binding_aborted. void close(); parameters none. native code only!getaddress returns the address to which this server...
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Drawing shapes with canvas - Web APIs
the top left corner of the blue square becomes x pixels from the left and y pixels from the top, at coordinate (x,y). later in this tutorial we'll see how we can translate the origin to a different position, rotate the grid and even scale it, but for now we'll stick to the default. drawing rectangles unlike svg, <canvas> only supports two primitive shapes: rectangles and paths (lists of points connected by lines). all other shapes must be created by combining one or more paths. luckily, we have an assortment of path drawing functions which make it possible to compose very complex shapes. first let's look at the rectangle. there are three functions that draw rectangles on the canvas: fillrect(x, y, width, height) draws a filled rectangle. strokerect(x, y, width, height) draws a rectangul...
...tangular outline 50x50 pixels within the cleared square. in upcoming pages we'll see two alternative methods for clearrect(), and we'll also see how to change the color and stroke style of the rendered shapes. unlike the path functions we'll see in the next section, all three rectangle functions draw immediately to the canvas. drawing paths now let's look at paths. a path is a list of points, connected by segments of lines that can be of different shapes, curved or not, of different width and of different color. a path, or even a subpath, can be closed. to make shapes using paths, we take some extra steps: first, you create the path. then you use drawing commands to draw into the path. once the path has been created, you can stroke or fill the path to render it. here are the functions ...
...function. you can probably best think of this as lifting a pen or pencil from one spot on a piece of paper and placing it on the next. moveto(x, y) moves the pen to the coordinates specified by x and y. when the canvas is initialized or beginpath() is called, you typically will want to use the moveto() function to place the starting point somewhere else. we could also use moveto() to draw unconnected paths. take a look at the smiley face below. to try this for yourself, you can use the code snippet below. just paste it into the draw() function we saw earlier. <html> <body onload="draw();"> <canvas id="canvas" width="150" height="150"></canvas> </body> </html> function draw() { var canvas = document.getelementbyid('canvas'); if (canvas.getcontext) { var ctx = canvas.getco...
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GamepadEvent.gamepad - Web APIs
%d buttons, %d axes.", e.gamepad.index, e.gamepad.id, e.gamepad.buttons.length, e.gamepad.axes.length); }); value a gamepad object. ...
...%d buttons, %d axes.", e.gamepad.index, e.gamepad.id, e.gamepad.buttons.length, e.gamepad.axes.length); }); value a gamepad object. ...
...%d buttons, %d axes.", e.gamepad.index, e.gamepad.id, e.gamepad.buttons.length, e.gamepad.axes.length); }); value a gamepad object. ...
...And 2 more matches

IDBDatabase - Web APIs
the interface provides the only way to get and manage versions of the database. note: this feature is available in web workers. note: everything you do in indexeddb always happens in the context of a transaction, representing interactions with data in the database. all objects in indexeddb — including object stores, indexes, and cursors — are tied to a particular transaction. thus, you cannot execute commands, access data, or open anything outside of a transaction. ...
... methods inherits from: eventtarget idbdatabase.close() ret...
...-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">idbdatabase</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties idbdatabase.name read only a domstring that contains the name of the connected database. idbdatabase.version read only a 64-bit integer that contains the version of the connected database. when a database is first created, this attribute is an empty string. idbdatabase.objectstorenames read only a domstringlist that contains a list of the names of the object stores currently in the connected database. methods inherits from: eventtarget idbdatabase.close() returns immediately and closes the connection to a database in a separate thread. idbdatabase.createmutab...
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Basic concepts - Web APIs
ay for you to persistently store data inside a user's browser. because it lets you create web applications with rich query abilities regardless of network availability, these applications can work both online and offline. indexeddb is useful for applications that store a large amount of data (for example, a catalog of dvds in a lending library) and applications that don't need persistent internet connectivity to work (for example, mail clients, to-do lists, and notepads). about this document this introduction discusses essential concepts and terminology in indexeddb. it gives you the big picture and explains key concepts. you'll find the following useful: for an overview of the design and structure of indexeddb, see big concepts. to learn more about indexeddb terms, see the definitions se...
...rent one. this will start a versionchange transaction and fire an upgradeneeded event. the only place where the schema of the database can be updated is inside the handler of that event. note: this definition describes the most recent specification, which is only implemented in up-to-date browsers. old browsers implemented the now deprecated and removed idbdatabase.setversion() method. ...
...only place where the schema of the database can be updated is inside the handler of that event. note: this definition describes the most recent specification, which is only implemented in up-to-date browsers. old browsers implemented the now deprecated and removed idbdatabase.setversion() method. database connection an operation created by opening a database. a given database can have multiple connections at the same time. ...
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PerformanceResourceTiming.responseEnd - Web APIs
example in the following example, the value of the *start and *end properties of all "resource" type events are logged. ...
... example in the following example, the value of the *start and *end properties of all "resource" type events are logged. ...
...events are logged. ...
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RTCDataChannel: open event - Web APIs
ransport used to send and receive the data channel's messages is opened or re-opened. ...
... cancelable no interface rtcdatachannelevent event handler property onopen examples this example adds to the rtcdatachannel dc a handler for the open event that adjusts the user interface to indicate that a chat window is ready to be used after a connection has been established. it enables the message input box and send button as well as enabling the disconnect button and disabling the connect button. ...
... chat window is ready to be used after a connection has been established. it enables the message input box and send button as well as enabling the disconnect button and disabling the connect button. finally, the message input box is focused so the user can immediately begin to type. dc.addeventlistener("open", ev => { messageinputbox.disabled = false; sendmessagebutton.disabled = false; disconnectbutton.disabled = false; connectbutton.disabled = true; messageinputbox.focus(); }, false); this can also be done by directly setting the value of the channel's onopen event handler property. ...
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RTCDataChannel - Web APIs
the rtcdatachannel interface represents a network channel which can be used for bidirectional peer-to-peer transfers of arbitrary data. every data channel is associated with an rtcpeerconnection, and each peer connection can have up to a theoretical maximum of 65,534 data channels (the actual limit may vary from browser to browser). to create a data channel and ask a remote peer to join you, call the rtcpeerconnection's createdatachannel() method. the peer being invited to exchange data receives a datachannel event (which has type rtcdatachannelevent) to let it know the data channel has been added to the connection. propertiesalso inherits properties from: eventtargetbinarytype the property binarytype on the rtcdatachannel interface is a domstring which specifies the type of javascript object...
... created, or null.maxretransmits read only the read-only rtcdatachannel property maxretransmits returns the maximum number of times the browser should try to retransmit a message before giving up, as set when the data channel was created, or null, which indicates that there is no maximum.negotiated read only the read-only rtcdatachannel property negotiated indicates whether the rtcdatachannel's connection was negotiated by the web app (true) or by the webrtc layer (false).ordered read only the read-only rtcdatachannel property ordered indicates whether or not the data channel guarantees in-order delivery of messages; the default is true, which indicates that the data channel is indeed ordered.protocol read only the read-only rtcdatachannel property protocol returns a domstring containing th...
...nly rtcdatachannel property protocol returns a domstring containing the name of the subprotocol in use. ...
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RTCIceCandidateStats.networkType - Web APIs
note: the networktype property is only included in rtcicecandidatestats objects for local candidates (that is, candidates generated locally and included in an sdp offer or answer that has been sent to the remote peer). syntax networktype = rtcicecandidatestats.networktype; value a domstring whose value is taken from the rtcnetworktype enumerated type. ...
... and included in an sdp offer or answer that has been sent to the remote peer). syntax networktype = rtcicecandidatestats.networktype; value a domstring whose value is taken from the rtcnetworktype enumerated type. the string indicates the type of network connection that the described candidate would use to communicate with the other peer. the permitted values are: bluetooth a bluetooth connection is used by the described connection. cellular the connection uses a cellular data service to connect. ...
...ates the type of network connection that the described candidate would use to communicate with the other peer. the permitted values are: bluetooth a bluetooth connection is used by the described connection. cellular the connection uses a cellular data service to connect. this includes all cellular data services including edge (2g), hspa (3g), lte (4g), and nr (5g). ethernet the described connection uses an ethernet network. wifi the described connection uses wifi. wimax the described connection uses a wimax network. vpn the connection uses a virtual private network (vpn). the vpn obscures the underlying network type, which is not discernible. unknown the user's browser is unable or unwilling to identify the underlying connection technology used by the described connection. this m...
...And 2 more matches

RTCIceServer - Web APIs
the rtciceserver dictionary defines how to connect to a single ice server (such as a stun or turn server). objects of this type are provided in the configuration of an rtcpeerconnection, in the iceservers array. properties credential optional the credential to use when logging into the server. this is only used if the rtciceserver represents a turn server. credentialtype optional if the rtciceserver represents a turn server, this attribute specifies what kind of credential is to be used when connecting. this must be one of the values defined by the rtcicecredentialtype enum. the default is password. urls this required property is either a single domstring or an array of domstrings, each specifying a url which can be used to connect to the server. username optional if the rtciceserver ...
...every server in the list will be contacted and tried out before one is selected to be used for negotiation. ...
... ...
...And 2 more matches

RTCIceTcpCandidateType - Web APIs
usage notes the rtcicetcpcandidatetype type is used by the tcptype property of rtcicecandidate objects. ...
... usage notes the rtcicetcpcandidatetype type is used by the tcptype property of rtcicecandidate objects. ...
... usage notes the rtcicetcpcandidatetype type is used by the tcptype property of rtcicecandidate objects. ...
...And 2 more matches

RTCRemoteOutboundRtpStreamStats.localId - Web APIs
you can examine, try out, and experiment with this example on glitch. example in this example, we have a pair of functions: the first, networkteststart(), captures an initial report, and the second, networkteststop(), captures a second report, then uses the two reports to output some information about the network conditions... xxx ... ...
...a second report, then uses the two reports to output some information about the network conditions... xxx ... networkteststart() this function simply calls the rtcpeerconnection method getstats() to request an rtcstatsreport and store it in the variable startreport. let startreport; async function networkteststart(pc) { if (pc) { startreport = await pc.getstats(); } } given an rtcpeerconnection, pc, this calls its getstats() method to obtain a statistics report object, which it stores in startreport for use once the end-of-test data has been collected by networkteststop(). networkteststop() the networkteststop() function obtains a second report, endreport, then uses the two reports together to determine several... xxx ... finding paired statistics each statistics record of type r...
...te over the map's values() to examine each of the rtcstats-based statistics records in the report until we find one that has the key property with the specified value. when a match is found, the statistics object is returned. if no match is found, the function returns null. the main networkteststop() function now let's look at the networkteststop() function itself. it takes as input the rtcpeerconnection being tested, calls getstats() to get a new rtcstatsreport with current statistics, then computes the results it's looking for, outputting those results as appropriate to the user by appending appropriate html to the contents of the <div> element whose class is stats-box. async function networkteststop(pc) { if (pc) { let statsbox = document.queryselector(".stats-box"); let endrepor...
...And 2 more matches

RTCSessionDescription - Web APIs
properties the rtcsessiondescription interface doesn't inherit any properties. ...
... properties the rtcsessiondescription interface doesn't inherit any properties. ...
... properties the rtcsessiondescription interface doesn't inherit any properties. ...
...And 2 more matches

RTCTrackEvent - Web APIs
the webrtc api interface rtctrackevent represents the track event, which is sent when a new mediastreamtrack is added to an rtcrtpreceiver which is part of the rtcpeerconnection. the target is the rtcpeerconnection object to which the track is being added. this event is sent by the webrtc layer to the web site or application, so you will not typically need to instantiate an rtctrackevent yourself. constructor rtctrackevent() creates and returns a new rtctrackevent object, initialized with properties taken from the specified rtctrackeventinit dictionary. you will probably not need to create new track events yourself, since they're typically created by the webrtc infrastructure and sent to the connection's ontrack event handler. properties since rtctrackevent is based on event, its proper...
...e specified rtctrackeventinit dictionary. you will probably not need to create new track events yourself, since they're typically created by the webrtc infrastructure and sent to the connection's ontrack event handler. properties since rtctrackevent is based on event, its properties are also available. receiver read only the rtcrtpreceiver used by the track that's been added to the rtcpeerconnection. streams read only optional an array of mediastream objects, each representing one of the media streams to which the added track belongs. by default, the array is empty, indicating a streamless track. track read only the mediastreamtrack which has been added to the connection. transceiver read only the rtcrtptransceiver being used by the new track. track event types there is only o...
...ch representing one of the media streams to which the added track belongs. by default, the array is empty, indicating a streamless track. track read only the mediastreamtrack which has been added to the connection. transceiver read only the rtcrtptransceiver being used by the new track. track event types there is only one type of track event. track the track event is sent to the rtcpeerconnection when a new track has been added to the connection. by the time the track event is delivered to the rtcpeerconnection's ontrack handler, the new media has completed its negotiation for a specific rtcrtpreceiver (which is specified by the event's receiver property). in addition, the mediastreamtrack specified by the receiver's track is the same one specified by the event's track, and the track ...
...And 2 more matches

ScriptProcessorNode.bufferSize - Web APIs
worki...
... working draft ...
... working draft ...
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WebSocket - Web APIs
the websocket object provides the api for creating and managing a websocket connection to a server, as well as for sending and receiving data on the connection. to construct a websocket, use the websocket() constructor. constructor websocket(url[, protocols]) returns a newly created websocket object. constants constant value websocket.connecting 0 websocket.open 1 websocket.closing 2 websocket.closed 3 properties websocket.binarytype the binary data type used by the connection. websocket.bufferedamount read only the number of bytes of queued data. websocket.extensions read only the extensions selected by the server. websocket.onclose an event listener to be called when the connection is closed. websocket.one...
...of queued data. websocket.extensions read only the extensions selected by the server. websocket.onclose an event listener to be called when the connection is closed. websocket.onerror an event listener to be called when an error occurs. websocket.onmessage an event listener to be called when a message is received from the server. websocket.onopen an event listener to be called when the connection is opened. websocket.protocol read only the sub-protocol selected by the server. websocket.readystate read only the current state of the connection. websocket.url read only the absolute url of the websocket. methods websocket.close([code[, reason]]) closes the connection. websocket.send(data) enqueues data to be transmitted. events listen to these events using addeventliste...
...read only the current state of the connection. websocket.url read only the absolute url of the websocket. methods websocket.close([code[, reason]]) closes the connection. websocket.send(data) enqueues data to be transmitted. events listen to these events using addeventlistener() or by assigning an event listener to the oneventname property of this interface. close fired when a connection with a websocket is closed. also available via the onclose property error fired when a connection with a websocket has been closed because of an error, such as when some data couldn't be sent. also available via the onerror property. message fired when data is received through a websocket. also available via the onmessage property. ...
...And 2 more matches

Writing a WebSocket server in Java - Web APIs
introduction this example shows you how to create a websocket api server using oracle java. although other server-side languages can be used to create a websocket server, this example uses oracle java to simplify the example code. this server conforms to rfc 6455, so it only handles connections from chrome version 16, firefox 11, ie 10 and higher. first steps websockets communicate over a tcp (transmission control protocol) connection. java's serversocket class is located in the java.net package. serversocket constructor: serversocket(int port) when you instantiate the serversocket class, it is bound to the port number you specified by the port argument. here's an implementation split into parts: import java.io.ioexception; import java.io.inputstream; import java.io.outputstr...
... java.net.socket getoutputstream() returns an output stream for this socket. outputstream methods: write(byte[] b, int off, int len) writes len bytes from the specified byte array starting at offset off t...
... java.net.socket getoutputstream() returns an output stream for this socket. outputstream methods: write(byte[] b, int off, int len) writes len bytes from the specified byte array starting at offset off to this output stream. inputstream methods: read(byte[] b, int off, int len) reads...
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Audio and video manipulation - Developer guides
b audio api has a lot of different filter/effects that can be applied to audio using the biquadfilternode, for example. ...
... different filter/effects that can be applied to audio using the biquadfilternode, for example. ...
...n" value="edit" /> <input id="reset" type="button" value="reset" /> </div> <textarea id="code" class="playable-code"> filter.type = "lowshelf"; filter.frequency.value = 1000; filter.gain.value = 25;</textarea> var context = new audiocontext(), audiosource = context.createmediaelementsource(document.getelementbyid("my-video")), filter = context.createbiquadfilter(); audiosource.connect(filter); filter.connect(context.destination); var textarea = document.getelementbyid('code'); var reset = document.getelementbyid('reset'); var edit = document.getelementbyid('edit'); var code = textarea.value; function setfilter() { eval(textarea.value); } reset.addeventlistener('click', function() { textarea.value = code; setfilter(); }); edit.addeventlistener('click', function() { ...
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Content-Security-Policy - HTTP
rectives fetch directives control the locations from which certain resource types may be loaded. child-src defines the valid sources for web workers and nested browsing contexts loaded using elements such as <frame> and <iframe>. instead of child-src, if you want to regulate nested browsing contexts and workers, you should use the frame-src and worker-src directives, respectively. connect-src restricts the urls which can be loaded using script interfaces default-src serves as a fallback for the other fetch directives. font-src specifies valid sources for fonts loaded using @font-face. frame-src specifies valid sources for nested browsing contexts loading using elements such as <frame> and <iframe>. img-src specifies valid sources of images and favicons. manifest-src spe...
... policy of the document or worker that created it. multiple content security policies the csp mechanism allows multiple policies being specified for a resource, including via the content-security-policy header, the content-security-policy-report-only header and a <meta> element. you can use the content-security-policy header more than once, as in the example below. pay special attention to the connect-src directive here. even though the second policy would allow the connection, the first policy contains connect-src 'none'. adding additional policies can only further restrict the capabilities of the protected resource, which means that there will be no connection allowed and, as the strictest policy, connect-src 'none' is enforced. content-security-policy: default-src 'self' http://example.com...
...hough the second policy would allow the connection, the first policy contains connect-src 'none'. adding additional policies can only further restrict the capabilities of the protected resource, which means that there will be no connection allowed and, as the strictest policy, connect-src 'none' is enforced. ...
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Keep-Alive - HTTP
chrome and firefox ignore them in http/2 responses, but safari conforms to the http/2 spec requirements and won’t load any response which contains them. ...
...chrome and firefox ignore them in http/2 responses, but safari conforms to the http/2 spec requirements and won’t load any response which contains them. ...
...chrome and firefox ignore them in http/2 responses, but safari conforms to the http/2 spec requirements and won’t load any response which contains them. ...
...And 2 more matches

Link - HTTP
ink> element. syntax link: < uri-reference >; param1=value1; param2="value2" <uri-reference> the uri reference, must be enclosed between < and >. parameters the link header contains parameters, which are separated with ; and are equivalent to attributes of the <link> element. ...
...>; param1=value1; param2="value2" <uri-reference> the uri reference, must be enclosed between < and >. parameters the link header contains parameters, which are separated with ; and are equivalent to attributes of the <link> element. ...
...s parameters, which are separated with ; and are equivalent to attributes of the <link> element. ...
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HTTP Messages - HTTP
messages are how data is exchanged between a server and a client. there are two types of messages: requests sent by the client to trigger an action on the server, and responses, the answer from the server. http messages are composed of textual information encoded in ascii, and span over multiple lines. in http/1.1, and earlier versions of the protocol, these messages were openly sent across the connection. in http/2, the once human-readable message is now divided up into http frames, providing optimization and performance improvements. web developers, or webmasters, rarely craft these textual http messages themselves: software, a web browser, proxy, or web server, perform this action. they provide http messages through config files (for proxies or servers), apis (for browsers), or other interf...
... it can be an absolute path, ultimately followed by a '?' and query string. this is the most common form, known as the origin form, and is used with get, post, head, and options methods. ...
... /test.html?query=alibaba http/1.1 options /anypage.html http/1.0 a complete url, known as the absolute form, is mostly used with get when connected to a proxy. get http://developer.mozilla.org/docs/web/http/messages http/1.1 the authority component of a url, consisting of the domain name and optionally the port (prefixed by a ':'), is called the authority form. it is only used with connect when setting up an http tunnel. connect developer.mozilla.org:80 http/1.1 the asterisk form, a simple asterisk ('*') is used with options, representing the server as a whole. options * http/1.1 the http version, which defines the structure of the remaining message, acting as an indicator of the expected version to use for the response. headers http headers from a request follo...
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A typical HTTP session - HTTP
in client-server protocols, like http, sessions consist of three phases: the client establishes a tcp connection (or the appropriate connection if the transport layer is not tcp). the client sends its request, and waits for the answer. the server processes the request, sending back its answer, providing a status code and appropriate data. as of http/1.1, the connection is no longer closed after completing the third phase, and the client is now granted a further request: this means the second and third phases can now be performed any number of times. establishing a connection in client-server protocols, it is the client which establishes the connection. opening a connection in http means initiating a connection in the underlying transport layer, usually this is tcp. with tcp the default...
... is 80. see identifying resources on the web for more details. note: the client-server model does not allow the server to send data to the client without an explicit request for it. to work around this problem, web developers use several techniques: ping the server periodically via the xmlhttprequest, fetch apis, using the websockets api, or similar protocols. sending a client request once the connection is established, the user-agent can send the request (a user-agent is typically a web browser, but can be anything else, a crawler, for example). a client request consists of text directives, separated by crlf (carriage return, followed by line feed), divided into three blocks: the first line contains a request method followed by its parameters: the path of the document, i.e. an absolu...
... also be nouns, these requests methods are sometimes referred as http verbs. the most common requests are get and post: the get method requests a data representation of the specified resource. requests using get should only retrieve data. the post method sends data to a server so it may change its state. this is the method often used for html forms. structure of a server response after the connected agent has sent its request, the web server processes it, and ultimately returns a response. similar to a client request, a server response is formed of text directives, separated by crlf, though divided into three blocks: the first line, the status line, consists of an acknowledgment of the http version used, followed by a status request (and its brief meaning in human-readable text). subse...
...And 2 more matches

Transport Layer Security - Web security
this article's goal is to help you make these decisions to ensure the confidentiality and integrity communication between client and server. the mozilla operations security (opsec) team maintains a wiki entry with reference configurations for servers. the transport layer security (tls) protocol is the standard for enabling two networked applications or devices to exchange information privately and robustly. applications that use tls can choose their security parameters, which can have a substantial impact on the security and reliability of data. ...
... communication verify that the other party is who they claim to be. encryption data is encrypted while being transmitted between the user agent and the server, in order to prevent it from being read and interpreted by unauthorized parties. integrity tls ensures that between encrypting, transmitting, and decrypting the data, no information is lost, damaged, tampered with, or falsified. a tls connection starts with a handshake phase where a client and server agree on a shared secret and important parameters, like cipher suites, are negotiated. once parameters and a data exchange mode where application data, such http, is exchanged. cipher suites the primary parameters that the tls handshake negotiates is a cipher suite. in tls 1.2 and earlier, the negotiated cipher suite includes a set of ...
...ards. the cipher names correspondence table on the mozilla opsec team's article on tls configurations lists these names as well as information about compatibility and security levels. configuring your server correctly configuring your server is crucial. in general, you should try to limit cipher support to the newest ciphers possible which are compatible with the browsers you want to be able to connect to your site. the mozilla opsec guide to tls configurations provides more information on recommended configurations. to assist you in configuring your site, mozilla provides a helpful tls configuration generator that will generate configuration files for the following web servers: apache nginx lighttpd haproxy amazon web services cloudformation elastic load balancer using the configurat...
...And 2 more matches

Index of archived content - Archive of obsolete content
adding sidebars adding windows and dialogs appendix a: add-on performance appendix b: install and uninstall scripts appendix c: avoiding using eval in add-ons appendix d: loading scripts appendix e: dom building and insertion (html & xul) appendix f: monitoring dom changes connecting to remote content custom xul elements with xbl getting started with firefox extensions handling preferences intercepting page loads introduction javascript object management local storage mozilla documentation roadmap observer notifications setting up a de...
...inds its configuration files how thunderbird and firefox find their configuration files introduction kill the xul.mfl file for good locked config settings other mozilla customization pages protecting mozilla's registry.dat file automatically handle failed asserts in debug builds blackconnect blackwood bonsai bookmark keywords build building transformiix standalone chromeless compiling the npruntime sample plugin in visual studio creating a firefox sidebar extension creating a microsummary creating a mozilla extension adding the structure ...
...ed) e4x e4x for templating processing xml with e4x e4x tutorial accessing xml children descendants and filters introduction namespaces the global xml object iterator liveconnect liveconnect overview liveconnect reference jsexception jsobject msx emulator (jsmsx) old proxy api parallelarray properly using css and javascript in xhtml documents examples ...
... making sure your theme works with rtl locales theme changes in firefox 2 theme changes in firefox 3 theme changes in firefox 3.5 theme changes in firefox 4 updating an extension to support multiple mozilla applications using firebug and jquery (screencast) using io timeout and interrupt on nt using ssh to connect to cvs using web standards in your web pages developing cross-browser and cross-platform pages references summary of changes using the w3c dom using workers in extensions web standards choosing standards compliance over proprietary practices community ...

Monitoring WiFi access points - Archive of obsolete content
code with universalxpconnect privileges can monitor the list of available wifi access points to obtain information about them including their ssid, mac address, and signal strength. this capability was introduced primarily to allow wifi-based location services to be used by geolocation services. example this example simply displays a list of the available access points. ...
...y was introduced primarily to allow wifi-based location services to be used by geolocation services. example this example simply displays a list of the available access points. ...
...oints.length; i++) { var a = accesspoints[i]; d.innerhtml += "<p>" + a.mac + " " + a.ssid + " " + a.signal + "</p>"; } var c = document.getelementbyid("c"); c.innerhtml = "<p>" + count++ + "</p>"; }, onerror: function (value) { alert("error: " +value); }, queryinterface: function(iid) { netscape.security.privilegemanager.enableprivilege('universalxpconnect'); if (iid.equals(components.interfaces.nsiwifilistener) || iid.equals(components.interfaces.nsisupports)) return this; throw components.results.ns_error_no_interface; }, } netscape.security.privilegemanager.enableprivilege('universalxpconnect'); var listener = new test(); var wifi_service = components.classes["@mozilla.org/wifi/monitor;1"].getse...
... </head> <body> <div id="d"><p></p></div> <div id="c"><p></p></div> </body> </html> the nsiwifilistener object the first thing the code above does is to prototype the listener object that will be receiving notifications of changes to the access point list. this object is described in lines 11 through 40 in the code above. the onchange() method (lines 13 through 27) begins by enabling universalxpconnect privileges, then clearing out the div (d) that will receive the updated list of access points. then the loop in lines 19-22 iterates over the list of access points received in the accesspoints array and adds them to the html in the div. then the c div is updated with the number of times the list has been refreshed. the onerror() method simply opens an alert that displays the error code received. ...

Mozilla Application Framework in Detail - Archive of obsolete content
ross-platform, full-featured, mature and well-tested layout engine available, providing robust and high quality support for a massive array of standards. its ability to render web content correctly is exceptional. gecko consists roughly of an html parser and xml parser, a dom implementation, a css parser and style system, and the code for css-based and html-based layout and rendering. as personal connectivity expands from the desktop computer to new web-enabled products and devices, gecko is a browser engine that has been designed from the ground up to power a new generation of desktop browsers and browsing devices and to accelerate the growth and development of the next-generation internet. small, fast and standards compliant, gecko is easily embeddable across platforms in browsers, desktop appl...
...ssing memory management this component object model makes virtually all of the functionality of gecko available as a series of components, or reusable cross-platform libraries, that can be accessed from the browser or scripted from any mozilla application. applications that want to access the various mozilla xpcom libraries (networking, security, dom, etc.) use a special layer of xpcom called xpconnect, which reflects the library interfaces into javascript (or other languages). xpconnect glues the front end to the c++-based components in xpcom, and it can be extended to include scripting support for other languages: pyxpcom already offers support for python, java is supported by javaxpcom, and there are efforts underway to add perl and ruby language support for xpconnect. on the developer side,...
...t is broad and includes.... mozilla has introductory support for wsdl... mozilla engineers have written and are in the process of refining a new security model for web services that will ease the deployment of applications using web services while maintaining the security of sites inside the user's firewall. ...
... origi...

XPJS Components Proposal - Archive of obsolete content
this is a proposal for a system that got implemented, but it may differ from the actual implementation. see the status document for more recent info on the status of this proposal. draft 1.0 what are xpjs components? xpjs components is a (cheesy) name for a system to support xpcom components written in javascript. now, you might ask: "isn't that what xpconnect does?" and i would answer that xpconnect is necessary, but not sufficient to the task. xpconnect provides the mechanisms for communication between native and js xpcom components, but it does not provide all of the infrastructure to register and instantiate js components outside of the limitations of the browser window. xpjs will provide that infrastructure. so what does this mean? the xpjs component system will support implem...
...r. the xpjsmanager is in charge of loading these .js files, helping them register themselves, and acting as an intermediary between the xpcom component manager and the js code. xjs components are not run in browser windows. each .js file (let's call it a module) is started up and run in the context of a relatively 'raw' js global object. the standard (non-dom) js classes will be available. the xpconnectcomponents object will be available. and some additional yet to be defined objects may be available. the xpconnectcomponents object allows access to the whole repository of native and js xpcom components, so this is not as isolated an environment as it might at first sound. a 'load' or 'import' function will also be provided to let the js code import other .js files where libraries of code might ...
... when a xpjs component module is first installed - or at autoregistration time - the xpjsmanager will load the .js file into a fresh js environment, let its top level script run to do whatever initialization it wants to do, and then it will call the module's nsregisterself function (passing the filespec of the .js file). ...
...nce for some clsid (or progid). the component manager will load up the xpjsmanager's module and call the native nsgetfactory it finds there. that native nsgetfactory function will check the information it stored in the registry to see that the js factory for the given clsid is in a given .js file. it will load that .js file (if not already loaded) and call the nsgetfactory function. our friend xpconnect will convert the js object returned from the js module's nsgetfactory function into an xpcom object. the component manager (and anyone else with a reference to that factory) can then call the factory's createinstance method at will. the js module is free to implement factories and components and services that the factories construct on command. any code anywhere and implemented in any language c...

Archived Mozilla and build documentation - Archive of obsolete content
how the autodial helper feature implemented for bug 93002 works and why it works that way. automated testing tips and tricks automatic mozilla configurator ankh8 automatically handle failed asserts in debug builds as of 2004-12-8, it is now possible to automatically handle failed asserts in debug builds of mozilla for windows. blackconnect blackwood bonsai it is a tool that lets you perform queries on the contents of a cvs archive; you can: get a list of checkins, see what checkins have been made by a given person, or on a given cvs branch, or in a particular time period. it also includes tools for looking at checkin logs (and comments); doing diffs between various versio...
... extends the html5 specification of the <audio> and <video> media elements by exposing audio metadata and raw audio data. this enables users to visualize audio data, to process this audio data and to create new audio data. java in firefox extensions if you are in need of calling java code from within a firefox extension, you can make use of liveconnect. ...
...html5 specification of the <audio> and <video> media elements by exposing audio metadata and raw audio data. this enables users to visualize audio data, to process this audio data and to create new audio data. java in firefox extensions if you are in need of calling java code from within a firefox extension, you can make use of liveconnect. ...
...ata. java in firefox extensions if you are in need of calling java code from within a firefox extension, you can make use of liveconnect. liveconnect gives your extension's javascript code (linked from or contained in xul code) access to 2 objects: java and packages (note that per this thread, although the new documentation for the liveconnect reimplementation states that these globals will be deprecated (in the context of applets), "firefox and the java plug-in will continue to support the global java/packages keywords, in particular in the context of firefox extensions."). these 2 objects let you make use of the standard jdk classes, e.g., javascript crypto mozilla defines a specia...

Deploying our app - Learn web development
lso allows you to run pre-deployment tasks, which in our case means that all the production code build processes can be performed inside of netlify and if the build is successful, the website changes will be deployed. although netlify offers a drag and drop deployment service, we are intending to trigger a new deployment to netlify each time we push to a github repo. it's exactly these kinds of connected services that we would encourage you to look for when deciding on your own build toolchain. we can commit our code and push to github and the updated code will automatically trigger the entire build routine. if all is well, we get a live change deployed automatically. the only action we need to perform is that initial "push". however, we do have to set these steps up, and we'll look at that no...
...we could have called it anything we like) using the branch master. we've not encountered branches at all, but the (terribly named) "master" branch is the default place for our work and it's what git starts on. it's also the default branch that netlify will look for, which is convenient. so with our project committed in git and pushed to our github repository, the next step in the toolchain is to connect github to netlify so our project can be deployed live on the web! using netlify for deployment deploying from github to netlify is surprisingly simple once you know the steps, particularly with "static websites" such as this project. note: there are also a lot of guides and tutorials on netlify to help you improve your development workflow. let's get this done: go to https://app.netli...
...ing on whether you authorized netlify before, you might need to authorize netlify with github, and choose what account you want to authorize it for (if you have multiple github accounts or orgs). choose the one you pushed your project to. netlify will prompt you with a list of the github repositories it can find. select your project repository and proceed to the next step. since we've connected netlify to our github account and given it access to deploy the project repository, netlify will ask how to prepare the project for deployment and what to deploy. you should enter the command npm run build for the build command, and specify the dist directory for the publish directory — this contains the code that we want to make public. to finish up, click deploy site. aft...
.... i'll show you how to add an initial test to your project and how to use the test to prevent or to allow the project deployment to happen. when approaching tests there's a good deal of ways to approach the problem: end-to-end testing, which involves your visitor clicking a thing and some other thing happening. integration testing, which basically says "does one block of code still work when connected to another block?" unit testing, where small and specific bits of functionality are tested to see if they do what they are supposed to do. and many more types. also see our cross browser testing module for a bunch of useful testing information remember also that tests are not limited to javascript; tests can be run against the rendered dom, user interactions, css, and even how a page looks.

Error codes returned by Mozilla APIs
ns_error_dom_file_not_found_err (0x80650000) file was not found. ns_error_dom_file_not_readable_err (...
...(0x805303f5) ns_error_dom_quota_reached (0x805303f6) an attempt was made to add data into the local or global storage for a given domain that would exceed the amount allowed for that domain. ns_error_dom_file_not_found_err (0x80650000) file was not found. ns_error_dom_file_not_readable_err (0x80650001) file could not be read. network errors the following errors can occur when creating connections over the network, or when reading or writing data. ns_binding_failed (0x804b0001) ns_binding_aborted (0x804b0002) the asynchronous request failed because it was aborted by some user action. ns_binding_redirected (0x804b0003) the asynchronous request has been "redirected" to a different async request. (for example, an http redirect occurred). this error code is used with load groups ...
...p is redirected to another request. ns_binding_retargeted (0x804b0004) the asynchronous request has been "retargeted" to a different "handler." this error code is used with load groups to notify the load group observer when a request in the load group is removed from the load group and added to a different load group. ns_error_malformed_uri (0x804b000a) the uri is malformed. ns_error_already_connected (0x804b000b) the connection is already established. xxx currently unused - consider removing. ns_error_not_connected (0x804b000c) the connection does not exist. xxx currently unused - consider removing. ns_error_connection_refused (0x804b000d) ns_error_net_timeout (0x804b000e) ns_error_in_progress (0x804b000f) the requested action could not be completed while the object is busy. im...
... ns_error_first_header_field_component_empty (0x804b0022) while parsing for the first component of a header field using syntax such as that for content-disposition or content-type, the first component was found to be empty. ...

Storage access policy: Block cookies from trackers
refox by clicking "report a problem" in the content blocking section of the control center (this shortcut may not be available in all versions of firefox). tracking protection explained how does firefox determine which resources are tracking resources? firefox uses the tracking protection list to determine which resources are tracking resources. the tracking protection list is maintained by disconnect. when the list is applied in firefox, we make two important changes: first, we only use the "basic protection" version of the list, which excludes some categories of trackers. in the future, we may expand our protections to use the "strict protection" version of the list. second, firefox uses an additional "entity list", which prevents domains from being classified as trackers when they are l...
...xception. dom cache: calls to cachestorage will always reject with a securityerror. browser caches: the http cache, the image cache, and the alternative services (alt-svc) cache are all partitioned for tracking resources, such that each top-level origin will have a separate partition and tracking resources on different top-level origins will be cached separate from each other. ...
...r. browser caches: the http cache, the image cache, and the alternative services (alt-svc) cache are all partitioned for tracking resources, such that each top-level origin will have a separate partition and tracking resources on different top-level origins will be cached separate from each other. network connections: tls sessions will not be resumed using a session ticket when an https connection is made to an embedded third-party resource that is classified as a tracker. ...
...) cache are all partitioned for tracking resources, such that each top-level origin will have a separate partition and tracking resources on different top-level origins will be cached separate from each other. network connections: tls sessions will not be resumed using a session ticket when an https connection is made to an embedded third-party resource that is classified as a tracker. http connection reuse by domains classified as trackers is limited to requests that occur under the same top-level origin. for example, a request for content from tracker.example on news.example will not reuse an http connection with a request for content from tracker.example on shopping.example or with requests that occur when tracker.example is visited directly (i.e., as a first party). http referrers ...

Leak-hunting strategies and tips
ructors that should have been virtual: if you expect to override an object's destructor (which includes giving a derived class of it an nscomptr member variable) and delete that object through a pointer to the base class using delete, its destructor better be virtual. ...
...verride an object's destructor (which includes giving a derived class of it an nscomptr member variable) and delete that object through a pointer to the base class using delete, its destructor better be virtual. (but we have many virtual destructors in the codebase that don't need to be -- don't do that.) debugging leaks that go through xpconnect many large object graphs that leak go through xpconnect. ...
...ncludes giving a derived class of it an nscomptr member variable) and delete that object through a pointer to the base class using delete, its destructor better be virtual. (but we have many virtual destructors in the codebase that don't need to be -- don't do that.) debugging leaks that go through xpconnect many large object graphs that leak go through xpconnect. ...
...ough a pointer to the base class using delete, its destructor better be virtual. (but we have many virtual destructors in the codebase that don't need to be -- don't do that.) debugging leaks that go through xpconnect many large object graphs that leak go through xpconnect. this can mean there will be xpconnect wrapper objects showing up as owning the leaked objects, but it doesn't mean it's xpconnect's fault (although that has been known to happen, it's rare). debugging leaks that go through xpconnect requires a basic understanding of what xpconnect does. xpconnect allows an xpcom object to be exposed to javascript, and it allows certain javascript objects to be exposed to c++ code as normal xpcom objects. when a c++ object is exposed to javascript (the more common of the two), an xpcwrapped...

I/O Functions
ed after the popular berkeley sockets. differences include the following: the blocking socket functions in nspr take a timeout parameter. two new functions, pr_transmitfile and pr_acceptread, can exploit the new system calls of some operating systems for higher performance. ...
... popular berkeley sockets. differences include the following: the blocking socket functions in nspr take a timeout parameter. two new functions, pr_transmitfile and pr_acceptread, can exploit the new system calls of some operating systems for higher performance. ...
...-write accesses to the file to be accomplished by normal memory accesses. memory-mapped i/o functions are currently implemented for unix, linux, mac os x, and win32 only. pr_createfilemap pr_memmap pr_memunmap pr_closefilemap anonymous pipe function pr_createpipe polling functions this section describes two of the most important polling functions provided by nspr: pr_poll pr_getconnectstatus pollable events a pollable event is a special kind of file descriptor. the only i/o operation you can perform on a pollable event is to poll it with the pr_poll_read flag. you cannot read from or write to a pollable event. the purpose of a pollable event is to combine event waiting with i/o waiting in a single pr_poll call. pollable events are implemented using a pipe or a pair of tcp...
... pollable events a pollable event is a special kind of file descriptor. the only i/o operation you can perform on a pollable event is to poll it with the pr_poll_read flag. you cannot read from or write to a pollable event. the purpose of a pollable event is to combine event waiting with i/o waiting in a single pr_poll call. pollable events are implemented using a pipe or a pair of tcp sockets connected via the loopback address, therefore setting and/or waiting for pollable events are expensive operating system calls. do not use pollable events for general thread synchronization; use condition variables instead. a pollable event has two states: set and unset. events are not queued, so there is no notion of an event count. a pollable event is either set or unset. pr_newpollableevent pr_des...

NSPR Error Handling
escriptor that is currently busy with another operation. pr_directory_open_error the directory could not be opened. pr_invalid_argument_error one or more of the arguments to the function is invalid. pr_address_not_available_error the network address (prnetaddr) is not available (probably in use). pr_address_not_supported_error the type of network address specified is not supported. pr_is_connected_error an attempt to connect on an already connected network file descriptor. pr_bad_address_error the network address specified is invalid (as reported by the network). pr_address_in_use_error network address specified (prnetaddr) is in use. pr_connect_refused_error the peer has refused to allow the connection to be established. pr_network_unreachable_error the network address specifie...
...d network file descriptor. pr_bad_address_error the network address specified is invalid (as reported by the network). pr_address_in_use_error network address specified (prnetaddr) is in use. pr_connect_refused_error the peer has refused to allow the connection to be established. pr_network_unreachable_error the network address specifies a host that is unreachable (perhaps temporary). pr_connect_timeout_error the connection attempt did not complete in a reasonable period of time. pr_not_connected_error the preceding function attempted to use connected semantics on a network file descriptor that was not connected. pr_load_library_error failure to load a dynamic library. pr_unload_library_error failure to unload a dynamic library. pr_find_symbol_error symbol could not be found in ...
...ge to perform the operation requested. pr_operation_not_supported_erro the requested operation is not supported by the platform. pr_protocol_not_supported_error the host operating system does not support the protocol requested. pr_remote_file_error access to the remote file has been severed. pr_buffer_overflow_error the value retrieved is too large to be stored in the buffer provided. pr_connect_reset_error the (tcp) connection has been reset by the peer. pr_range_error unused. pr_deadlock_error performing the requested operation would have caused a deadlock. the deadlock was avoided. pr_file_is_locked_error an attempt to acquire a lock on a file has failed because the file is already locked. pr_file_too_big_error completing the write or seek operation would have resulted in a f...
...m the desired request is locked. pr_no_more_files_error there are no more entries in the directory. pr_end_of_file_error unexpectedly encountered end of file (mac os only). pr_file_seek_error an unexpected seek error (mac os only). pr_file_is_busy_error the file is busy and the operation cannot be performed. pr_in_progress_error the operation is still in progress (probably a nonblocking connect). pr_already_initiated_error the (retried) operation has already been initiated (probably a nonblocking connect). pr_group_empty_error the wait group is empty. pr_invalid_state_error the attempted operation is on an object that was in an improper state to perform the request. pr_max_error placeholder for the end of the list. ...

PR_TransmitFile
sourcefile a pointer to a prfiledesc object representing the file to send. headers a pointer to the buffer holding the headers to be sent before sending data. hlen length of the headers buffer in bytes. flags one of the following flags: pr_transmitfile_keep_open indicates that the socket will be kept open after the data is sent. ...
... sourcefile a pointer to a prfiledesc object representing the file to send. headers a pointer to the buffer holding the headers to be sent before sending data. hlen length of the headers buffer in bytes. flags one of the following flags: pr_transmitfile_keep_open indicates that the socket will be kept open after the data is sent. ...
...a over. sourcefile a pointer to a prfiledesc object representing the file to send. headers a pointer to the buffer holding the headers to be sent before sending data. hlen length of the headers buffer in bytes. flags one of the following flags: pr_transmitfile_keep_open indicates that the socket will be kept open after the data is sent. pr_transmitfile_close_socket indicates that the connection should be closed immediately after successful transfer of the file. timeout time limit for completion of the transmit operation. returns a positive number indicates the number of bytes successfully written, including both the headers and the file. the value -1 indicates a failure. if an error occurs while sending the file, the pr_transmitfile_close_socket flag is ignored. the reason...
...ns a positive number indicates the number of bytes successfully written, including both the headers and the file. the value -1 indicates a failure. if an error occurs while sending the file, the pr_transmitfile_close_socket flag is ignored. the reason for the failure can be obtained by calling pr_geterror. description the pr_transmitfile function sends a complete file (sourcefile) across a connected socket (networksocket). if headers is non-null, pr_transmitfile sends the headers across the socket before sending the file. the enumeration prtransmitfileflags, used in the flags parameter, is defined as follows: typedef enum prtransmitfileflags { pr_transmitfile_keep_open = 0, pr_transmitfile_close_socket = 1 } prtransmitfileflags; ...

Notes on TLS - SSL 3.0 Intolerant Servers
problem a number of netscape 6.x/7.x and mozilla users have reported that some secure sites -- typically sites featuring online transactions or online banking over the https protocol -- do not display any content at all. the connection seems terminated and a blank page is displayed. this is the main symptom of the problem when mozilla based browsers encounter tls/ssl 3.0 intolerant servers. cause there are some number of web servers in production today which incorrectly implement the ssl 3.0 specification. this incorrect implementation causes them to reject connection attempts from clients that are compliant with the ssl 3.0 and tls (aka ssl 3.1) specifications. netscape 6.x/7.x and mozilla browsers (0.9.1 and later versions) correctly implement the tls specification, and the users cannot ut...
...a browsers (0.9.1 and later versions) correctly implement the tls specification, and the users cannot utilize sites which have this problem. technical information the ssl 3.0 and tls (aka ssl 3.1) specs both contain a provision -- the same provision -- for detecting "version rollback attacks". it is designed to permit a server to detect a man-in-the-middle that is altering the ssl client hello (connection) requests as they pass from the client to the server, altering them by changing the protocol version number to a lower version number. this feature was kind of meaningless until tls (ssl 3.1) came along because there was no version higher than 3.0 from which to be rolled back. tls is now available and used, and products that have implemented the roll-back detection incorrectly are not interope...
... higher than 3.0 from which to be rolled back. tls is now available and used, and products that have implemented the roll-back detection incorrectly are not interoperable with tls/ssl spec-compliant clients. normally the servers which have this problem are not equipped to deal with the tls protocol, but instead of rolling back to ssl 3.0 as the rollback provision provides, they terminate/drop the connection, thus resulting in most cases a blank page display. for up-to-date information, you can read a bugzilla bug report which keeps track of this problem with mozilla-based browsers. see bug 59321. servers currently known to exhibit this intolerant behavior as of this writing, this problem has been reported for the following servers: (wherever there is an upgraded version which fixes the problem...
...0/6.01/6.1 pr 1 or mozilla build (prior to 6/11/2001), you should look out for the symptom described below. you may also run this test with versions later than the older versions of netscape 6.x or mozilla -- just in case code changes in netscape 6.1/mozilla 0.9.2 or later may not catch all problem servers. when you find a secure site which simply does not display any page content or drops the connection, check to see if the preference option edit | preferences | privacy and security | ssl | enable tls is turned on. if so, turn it off. now re-visit the problem site. if the content displays this time, you are most likely witnessing a tls/ssl 3.0 intolerant server. report such a problem to the server's administrator. how to report an intolerant server optional:get the name of the ssl serv...

Avoiding leaks in JavaScript XPCOM components
n firefox 3, a cycle collector was introduced and refined in later versions, and mozilla is currently working on a generational garbage collector for js. this article needs to be updated to reflect the changes and the cases where they help. take every information on this site with a grain of salt, although most concepts and best practices still apply. using xpcom in javascript (also known as xpconnect) is an environment where memory management issues are not obvious. there are no calls to malloc and free and no reference counting. despite this, it's easy to write javascript code that leaks. it's easy to write leaky code in any garbage-collected language. but it's even easier in this environment because some of the objects you're dealing with are reference-counted behind the scenes. programmer...
...ammer can still create leaks by leaving objects reachable that are no longer needed. for example, if an object's constructor adds the object to a list that is reachable from a global variable and nothing ever removes it from the list, the object will never be destroyed since it is always reachable from the list. ...
...it allows javascript code to access xpcom objects (i.e., it wraps native xpcom objects for javascript) and it allows javascript code to implement xpcom interfaces (i.e., it wraps javascript objects for xpcom). ...
...it allows javascript code to access xpcom objects (i.e., it wraps native xpcom objects for javascript) and it allows javascript code to implement xpcom interfaces (i.e., it wraps javascript objects for xpcom). for javascript objects that implement xpcom interfaces, the interface between reference counting and garbage collection is quite simple. ...

Using the Multiple Accounts API
r nsimsgaccountmanager.createincomingserver(in string type) nsimsgincomingserver nsimsgaccountmanager.getincomingserver(in string key) smtp servers smtp servers are kept separately from all the other account management stuff. a user's smtp servers are not actually dependant on any of the account settings. the only thing that determines which smtp server a user should use is their physical connection to the internet. for instance, if a user is connected to the internet through myisp, inc. then he or she must use myisp's smtp server, no matter what identity they will be sending mail with. the smtp server list is accessable through the smtp service. you can add (and eventually delete) servers and have a default server. smtp servers are stored in your preferences in a manner resembling the ...
...: mail.server.server.empty_trash_on_exit boolean, (should not be imap-specific) - should we empty this server's trash when we quit? preference: mail.server.server.offline_download - boolean, is this server marked for offline download? preference: mail.server.server.override_namespaces - boolean, should we override namespaces on this server? ...
...xit boolean, (should not be imap-specific) - should we empty this server's trash when we quit? preference: mail.server.server.offline_download - boolean, is this server marked for offline download? preference: mail.server.server.override_namespaces - boolean, should we override namespaces on this server? ...
...ctions left open to the server preference: mail.server.server.empty_trash_threshhold integer, (should not be imap-specific) max k of wasted diskspace before we purge a folder preference: mail.server.server.delete_model - integer, delete model (move to trash, imap delete, purge immediately, not sure of values) preference: mail.server.server.timeout - integer, number of minutes a connection is idle before we drop it preference: mail.server.server.capability - list of capabilities of this server preference: mail.server.server.namespace.public - the server's namespace for public folders preference: mail.server.server.namespace.personal - the server's namespace for personal folders preference: mail.server.server.namespace.other_users - the server's namespace for othe...

Mozilla
he fact that there is more than one way to achieve any given visual effect in a browser. so, if the effect of complex markup is being tested, put that complex markup into a page and create another page that uses simple markup to achieve the same visual effect. reftest will then compare them and verify whether they produce the same bitmap. creating sandboxed http connections starting with gecko 1.8.1 (firefox 2), it is possible to create sandboxed http connections which don't affect the user's cookies. this article will cover the basics of doing http connections from xpcom javascript, and should easily translate to c++ xpcom. debugging debugging a project as large as mozilla can be...
...ons.) how to implement a custom autocomplete search component the xul textbox element supports an autocomplete mechanism that is used to create a textbox with a popup containing a list of possible completions for what the user has started to type. there are actually two autocomplete mechanisms: how to investigate disconnect failures this article will guide you on how to investigate disconnect failures. an example of such a failure how to report a hung firefox is your firefox not responding? or are you regularly seeing the "firefox is running but is not responding..." dialog? this usually means that something in firefox is hung. this may be becaus...
...efox and other applications, mozilla developers have created a number of useful javascript libraries you can use in your projects. documentation for these libraries can be found here. javascript tips javascript-dom prototypes in mozilla when a dom node is accessed from javascript in mozilla, the native c++ dom node is wrapped using xpconnect and the wrapper is exposed to javascript as the javascript representation of the dom node. when xpconnect wraps a c++ object it will create a jsobject that is unique to this c++ object. in the case where the c++ object has class info (nsiclassinfo), the jsobject is a more or less empty jsobject which is not really that special. all the methods that are supposed to show up on...
...l is to text, mathml is to mathematical equations and cml is to the description of chemical molecules. mozilla technologies mozilla has several technologies used as components of its projects. these are documented here. mozilla web developer faq this document answers questions that web authors ask frequently specifically in connection with firefox and other gecko-based browsers. there are links to more general web authoring faqs at the end of this document. mozilla web services security model (this document is being compiled from scattered documentation and source code and most of the information in it has not been verified. please do not depend on anything in it being correct for security.) ...

Index - Firefox Developer Tools
ity the network monitor shows you all the network requests firefox makes (for example, when it loads a page, or due to xmlhttprequests), how long each request takes, and details of each request. 47 inspecting web sockets javascript, network monitor, webapis, web socket inspector, web sockets since firefox 71, the network monitor has had the ability to inspect web socket connections. this article explores what functionality the web socket inspector makes available. 48 network monitor recording 110n:priority, debugging, dev tools, firefox, guide, networking, tools you can pause and resume the monitoring of network traffic using the pause button. 49 network monitor toolbar 110n:priority, debugging, dev tools, firefox, guide, networking, ...
...y, debugging, dev tools, firefox, guide, networking, tools the network monitor includes a performance analysis tool, to help show you how long the browser takes to download the different parts of your site. 53 throttling 110n:priority, debugging, dev tools, firefox, guide, networking, tools the network monitor allows you to throttle your network speed to emulate various connection speeds so you can see how your app will behave under different connection types. 54 page inspector css, dom, html, stylesheets, web development, web development:tools, l10n:priority use the page inspector to examine and modify the html and css of a page. 55 how to links for various how to's can be found here. these links describe in depth the how to t...
... the performance tool's ui consists of 4 main pieces: 94 waterfall 95 remote debugging tools, l10n:priority you can use the firefox developer tools on your desktop to debug web sites and web apps running in other browsers or runtimes. the other browser might be on the same device as the tools themselves or on a different device, such as a phone connected over usb. 96 debugging firefox desktop debugging, guide, tools this guide explains how you can use the firefox developer tools to debug a different instance of desktop firefox running on the same machine. in this guide, the instance of firefox being debugged is called the debuggee, and the instance of firefox doing the debugging is called the debugger. 101 respon...
...ole remoting debugging, reference, référence(2), web console this document describes the way web console remoting works. the web console is split between a client with its user interface, and the server which has listeners for all the things that happen in the tab. for communication between the server and the client we use the remote debugging protocol. this architecture allows you to connect a web console client instance to a server running on b2g, fennec or some other firefox instance. 155 web console keyboard shortcuts these shortcuts apply when you're in the command line interpreter. 156 working with iframes debugging, devtools, developer tools, frames, tools you can point the developer tools at a specific iframe within a document. ...

Web Audio Editor - Firefox Developer Tools
ource, such as an oscillator or a data buffer source nodes performing transformations such as delay and gain nodes representing the destination of the audio stream, such as the speakers each node has zero or more audioparam properties that configure its operation. for example, the gainnode has a single gain property, while the oscillatornode has frequency and detune properties. the developer connects the nodes in a graph, and the complete graph defines the behavior of the audio stream. the web audio editor examines an audio context constructed in the page and provides a visualization of its graph. this gives you a high-level view of its operation, and enables you to ensure that all the nodes are connected in the way you expect. you can then examine and edit the audioparam properties for eac...
...lt the violent theremin, which changes the pitch and volume of a sine wave as you move the mouse pointer visualizing the graph the web audio editor will now display the graph for the loaded audio context. here's the graph for the violent theremin demo: you can see that it uses three nodes: an oscillatornode as the source, a gainnode to control the volume, and an gainnode as the destination. ...
...the pitch and volume of a sine wave as you move the mouse pointer visualizing the graph the web audio editor will now display the graph for the loaded audio context. here's the graph for the violent theremin demo: you can see that it uses three nodes: an oscillatornode as the source, a gainnode to control the volume, and an gainnode as the destination. connections to audioparams displaying connections to audioparams is new in firefox 34. ...
... mouse pointer visualizing the graph the web audio editor will now display the graph for the loaded audio context. here's the graph for the violent theremin demo: you can see that it uses three nodes: an oscillatornode as the source, a gainnode to control the volume, and an gainnode as the destination. connections to audioparams displaying connections to audioparams is new in firefox 34. connections between nodes are displayed as solid lines. if, instead, you've connected a node to an audioparam in another node, then the connection is shown as a dashed line between the nodes, and is labeled with the name of the audioparam: inspecting and modifying audionodes if you click on a node, it's highlighted and you get a node inspector on the right hand side. this list the values of that node's...

Web Console remoting - Firefox Developer Tools
introduction this document describes the way web console remoting works. the web console is split between a client with its user interface, and the server which has listeners for all the things that happen in the tab. for communication between the server and the client we use the remote debugging protocol. this architecture allows you to connect a web console client instance to a server running on b2g, fennec or some other firefox instance. to better understand the architecture of the web console we recommend learning about the debugger architecture. the remote web console is a feature introduced in firefox 18. this document describes the latest protocol, with changes that have been made since then. the webconsoleactor and the webconsoleclient the webconsoleactor lives in dbg-webco...
...client the webconsoleactor lives in dbg-webconsole-actors.js, in the toolkit/devtools/webconsole folder. the webconsoleclient lives in webconsoleclient.jsm (in toolkit/devtools/webconsole) and it is used by the web console when working with the web console actor. ...
...these can be: page errors, window.console api messages, network activity, and file activity. ...
...aw text. starting with firefox 19: for non-text response types we send the content in base64 encoding (again, most likely a longstringactor grip). to tell the difference just check if response.content.encoding == "base64". the geteventtimings packet: { "to": "conn0.netevent15", "type": "geteventtimings" } { "from": "conn0.netevent15", "timings": { "blocked": 0, "dns": 0, "connect": 0, "send": 0, "wait": 16, "receive": 0 }, "totaltime": 16 } the fileactivity packet when a file load is observed the following fileactivity packet is sent to the client: { "from": "conn0.console9", "type": "fileactivity", "uri": "file:///home/mihai/public_html/mozilla/test2.css" } history protocol changes by firefox version: firefox 18: initial version. firefox ...

about:debugging (before Firefox 68) - Firefox Developer Tools
s.aboutdebugging.showsystemaddons preference. if you need to see system add-ons, navigate to about:config and make sure that this value is set to true. add-ons the add-ons section in about:debugging only supports restartless add-ons, including basic bootstrapped extensions, add-on sdk add-ons, and webextensions. this page enables you to do two things: load an add-on temporarily from disk connect the add-on debugger to any restartless add-ons connecting the add-on debugger the add-ons page in about:debugging lists all restartless add-ons that are currently installed (note that this list may include add-ons that came preinstalled with your firefox). next to each entry is a button labeled "debug". if the "debug" button is disabled, check the "enable add-on debugging" box. if you clic...
...he add-on debugger the add-ons page in about:debugging lists all restartless add-ons that are currently installed (note that this list may include add-ons that came preinstalled with your firefox). next to each entry is a button labeled "debug". if the "debug" button is disabled, check the "enable add-on debugging" box. if you click "debug", you'll see a dialog asking you to accept an incoming connection. click "ok", and the add-on debugger will start in a separate window. note that sometimes the debugger window is hidden by the main firefox window. see the page on the add-on debugger for all the things you can do with this tool. the "enable add-on debugging" button works by turning on the devtools.chrome.enabled and devtools.debugger.remote-enabled preferences. both preferences must be t...
...ing starts to support remote debugging, and this page can begin to list tabs available for debugging on mobile device browsers, simulators, etc. see bug 1212802 for the latest on this work. workers the workers page shows your workers, categorised as follows: all registered service workers all registered shared workers other workers, including chrome workers and dedicated workers you can connect the developer tools to each worker, and send push notifications to service workers. service worker state from firefox 52, the list of service workers shows the state of the service worker in its lifecycle. three states are distinguished: "registering": this covers all states between the service worker's initial registration, and its assuming control of pages. that is, it subsumes the "inst...
...ut has been terminated after being idle. this section uses a simple serviceworker demo, hosted at https://serviceworke.rs/push-simple/. debugging workers for a service worker, if it is already running, you'll see two buttons next to it, labeled "debug" and "push". if it's not already running, you'll see one button, labeled "start": click this to start the service worker. clicking "debug" connects the javascript debugger and console to this worker. you can set breakpoints, step through code, watch variables, evaluate code, and so on: registering workers at first, you won't see any workers listed under service workers or shared workers. as soon as a worker is registered, the listing is updated: before firefox 47, service workers were only shown when they were actually running. un...

AudioNode - Web APIs
nsolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">audionode</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} note: an audionode can be target of events, therefore it implements the eventtarget interface. description the audio routing graph each audionode has inputs and outputs, and multiple audio nodes are connected to build a processing graph. this graph is contained in an audiocontext, and each audio node can only belong to one audio context. a source node has zero inputs but one or multiple outputs, and can be used to generate sound. on the other hand, a destination node has no outputs; instead, all its inputs are directly played back on the speakers (or whatever audio output device the audio context u...
.... source nodes are defined as nodes having a numberofinputs property with a value of 0. audionode.numberofoutputs read only returns the number of outputs coming out of the node. destination nodes — like audiodestinationnode — have a value of 0 for this attribute. audionode.channelcount represents an integer used to determine how many channels are used when up-mixing and down-mixing connections to any inputs to the node. its usage and precise definition depend on the value of audionode.channelcountmode. audionode.channelcountmode represents an enumerated value describing the way channels must be matched between the node's inputs and outputs. audionode.channelinterpretation represents an enumerated value describing the meaning of the channels. this interpretation will define h...
...describing the way channels must be matched between the node's inputs and outputs. audionode.channelinterpretation represents an enumerated value describing the meaning of the channels. this interpretation will define how audio up-mixing and down-mixing will happen. the possible values are "speakers" or "discrete". methods also implements methods from the interface eventtarget. audionode.connect() allows us to connect the output of this node to be input into another node, either as audio data or as the value of an audioparam. audionode.disconnect() allows us to disconnect the current node from another one it is already connected to. example this simple snippet of code shows the creation of some audio nodes, and how the audionode properties and methods can be used. you can find exam...
...s simple snippet of code shows the creation of some audio nodes, and how the audionode properties and methods can be used. you can find examples of such usage on any of the examples linked to on the web audio api landing page (for example violent theremin.) const audioctx = new audiocontext(); const oscillator = new oscillatornode(audioctx); const gainnode = new gainnode(audioctx); oscillator.connect(gainnode).connect(audioctx.destination); oscillator.context; oscillator.numberofinputs; oscillator.numberofoutputs; oscillator.channelcount; specifications specification status comment web audio apithe definition of 'audionode' in that specification. working draft ...

BaseAudioContext.createDynamicsCompressor() - Web APIs
myaudio); // create a compressor node var compressor = audioctx.createdynamicscompressor(); compressor.threshold.setvalueattime(-50, audioctx.currenttime); compressor.knee.setvalueattime(40, audioctx.currenttime); compressor.ratio.setvalueattime(12, audioctx.currenttime); compressor.attack.setvalueattime(0, audioctx.currenttime); compressor.release.setvalueattime(0.25, audioctx.currenttime); // connect the audiobuffersourcenode to the destination source.connect(audioctx.destination); button.onclick = function() { var active = button.getattribute('data-active'); if(active == 'false') { button.setattribute('data-active', 'true'); button.innerhtml = 'remove compression'; source.disconnect(audioctx.destination); source.connect(compressor); compressor.connect(audioctx.desti...
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BaseAudioContext.createStereoPanner() - Web APIs
stream in a stereo image using a low-cost equal-power panning algorithm. syntax baseaudiocontext.createstereopanner(); returns a stereopannernode. example in our stereopannernode example (see source code) html we have a simple <audio> element along with a slider <input> to increase and decrease pan value. in the javascript we create a mediaelementaudiosourcenode and a stereopannernode, and connect the two together using the connect() method. we then use an oninput event handler to change the value of the stereopannernode.pan parameter and update the pan value display when the slider is moved. moving the slider left and right while the music is playing pans the music across to the left and right speakers of the output, respectively. var audioctx = new (window.audiocontext || window.webkit...
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ConstantSourceNode - Web APIs
the constantsourcenode interface—part of the web audio api—represents an audio source (based upon audioscheduledsourcenode) whose output is single unchanging value. this makes it useful for cases in which you need a constant value coming in from an audio source. in addition, it can be used like a constructible audioparam by automating the value of its offset or by connecting another node to it; see controlling multiple parameters with constantsourcenode. a constantsourcenode has no inputs and exactly one monaural (one-channel) output. the output's value is always the same as the value of the offset parameter. number of inputs 0 number of outputs 1 constructor constantsourcenode() creates and returns a new constantsourcenode instance, optionally specifying...
...rameters with constantsourcenode, a constantsourcenode is created to allow one slider control to change the gain on two gainnodes. the three nodes are set up like this: gainnode2 = context.creategain(); gainnode3 = context.creategain(); gainnode2.gain.value = gainnode3.gain.value = 0.5; volumeslidercontrol.value = gainnode2.gain.value; constantnode = context.createconstantsource(); constantnode.connect(gainnode2.gain); constantnode.connect(gainnode3.gain); constantnode.start(); gainnode2.connect(context.destination); gainnode3.connect(context.destination); this code starts by creating the gain nodes and setting them and the volume control that will adjust their value all to 0.5. then the constantsourcenode is created by calling audiocontext.createconstantsource(), and the gain parameters of ...
... now, whenever the value of constantnode.offset changes, the gain on both gainnode2 and gainnode3 will change to have that same value. ...
...code starts by creating the gain nodes and setting them and the volume control that will adjust their value all to 0.5. then the constantsourcenode is created by calling audiocontext.createconstantsource(), and the gain parameters of each of the two gain nodes are connected to the constantsourcenode. after starting the constant source by calling its start() method. finally, the two gain nodes are connected to the audio destination (typically speakers or headphones). now, whenever the value of constantnode.offset changes, the gain on both gainnode2 and gainnode3 will change to have that same value. to see this example in action, as well as to read the rest of the code from which these snippets were derived, see controlling multiple parameters with constantsourcenode. specification spe...

DynamicsCompressorNode.attack - Web APIs
myaudio); // create a compressor node var compressor = audioctx.createdynamicscompressor(); compressor.threshold.setvalueattime(-50, audioctx.currenttime); compressor.knee.setvalueattime(40, audioctx.currenttime); compressor.ratio.setvalueattime(12, audioctx.currenttime); compressor.attack.setvalueattime(0, audioctx.currenttime); compressor.release.setvalueattime(0.25, audioctx.currenttime); // connect the audiobuffersourcenode to the destination source.connect(audioctx.destination); button.onclick = function() { var active = button.getattribute('data-active'); if(active == 'false') { button.setattribute('data-active', 'true'); button.innerhtml = 'remove compression'; source.disconnect(audioctx.destination); source.connect(compressor); compressor.connect(audioctx.desti...
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DynamicsCompressorNode.knee - Web APIs
myaudio); // create a compressor node var compressor = audioctx.createdynamicscompressor(); compressor.threshold.setvalueattime(-50, audioctx.currenttime); compressor.knee.setvalueattime(40, audioctx.currenttime); compressor.ratio.setvalueattime(12, audioctx.currenttime); compressor.attack.setvalueattime(0, audioctx.currenttime); compressor.release.setvalueattime(0.25, audioctx.currenttime); // connect the audiobuffersourcenode to the destination source.connect(audioctx.destination); button.onclick = function() { var active = button.getattribute('data-active'); if(active == 'false') { button.setattribute('data-active', 'true'); button.innerhtml = 'remove compression'; source.disconnect(audioctx.destination); source.connect(compressor); compressor.connect(audioctx.desti...
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DynamicsCompressorNode.ratio - Web APIs
myaudio); // create a compressor node var compressor = audioctx.createdynamicscompressor(); compressor.threshold.setvalueattime(-50, audioctx.currenttime); compressor.knee.setvalueattime(40, audioctx.currenttime); compressor.ratio.setvalueattime(12, audioctx.currenttime); compressor.attack.setvalueattime(0, audioctx.currenttime); compressor.release.setvalueattime(0.25, audioctx.currenttime); // connect the audiobuffersourcenode to the destination source.connect(audioctx.destination); button.onclick = function() { var active = button.getattribute('data-active'); if(active == 'false') { button.setattribute('data-active', 'true'); button.innerhtml = 'remove compression'; source.disconnect(audioctx.destination); source.connect(compressor); compressor.connect(audioctx.desti...
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DynamicsCompressorNode.release - Web APIs
myaudio); // create a compressor node var compressor = audioctx.createdynamicscompressor(); compressor.threshold.setvalueattime(-50, audioctx.currenttime); compressor.knee.setvalueattime(40, audioctx.currenttime); compressor.ratio.setvalueattime(12, audioctx.currenttime); compressor.attack.setvalueattime(0, audioctx.currenttime); compressor.release.setvalueattime(0.25, audioctx.currenttime); // connect the audiobuffersourcenode to the destination source.connect(audioctx.destination); button.onclick = function() { var active = button.getattribute('data-active'); if(active == 'false') { button.setattribute('data-active', 'true'); button.innerhtml = 'remove compression'; source.disconnect(audioctx.destination); source.connect(compressor); compressor.connect(audioctx.desti...
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DynamicsCompressorNode.threshold - Web APIs
myaudio); // create a compressor node var compressor = audioctx.createdynamicscompressor(); compressor.threshold.setvalueattime(-50, audioctx.currenttime); compressor.knee.setvalueattime(40, audioctx.currenttime); compressor.ratio.setvalueattime(12, audioctx.currenttime); compressor.attack.setvalueattime(0, audioctx.currenttime); compressor.release.setvalueattime(0.25, audioctx.currenttime); // connect the audiobuffersourcenode to the destination source.connect(audioctx.destination); button.onclick = function() { var active = button.getattribute('data-active'); if(active == 'false') { button.setattribute('data-active', 'true'); button.innerhtml = 'remove compression'; source.disconnect(audioctx.destination); source.connect(compressor); compressor.connect(audioctx.desti...
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DynamicsCompressorNode - Web APIs
myaudio); // create a compressor node var compressor = audioctx.createdynamicscompressor(); compressor.threshold.setvalueattime(-50, audioctx.currenttime); compressor.knee.setvalueattime(40, audioctx.currenttime); compressor.ratio.setvalueattime(12, audioctx.currenttime); compressor.attack.setvalueattime(0, audioctx.currenttime); compressor.release.setvalueattime(0.25, audioctx.currenttime); // connect the audiobuffersourcenode to the destination source.connect(audioctx.destination); button.onclick = function() { var active = button.getattribute('data-active'); if(active == 'false') { button.setattribute('data-active', 'true'); button.innerhtml = 'remove compression'; source.disconnect(audioctx.destination); source.connect(compressor); compressor.connect(audioctx.desti...
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IDBFactory.open() - Web APIs
may trigger upgradeneeded, blocked or versionchange events. note: this feature is available in web workers. ...
... may trigger upgradeneeded, blocked or versionchange events. note: this feature is available in web workers. ...
... may trigger upgradeneeded, blocked or versionchange events. note: this feature is available in web workers. ...
...ed, blocked or versionchange events. note: this feature is available in web workers. syntax for the current standard: var idbopendbrequest = indexeddb.open(name); var idbopendbrequest = indexeddb.open(name, version); parameters name the name of the database. version optional optional. the version to open the database with. if the version is not provided and the database exists, then a connection to the database will be opened without changing its version. if the version is not provided and the database does not exist, then it will be created with version 1. experimental gecko options object options (version and storage) optional in gecko, since version 26, you can include a non-standard options object as a parameter of idbfactory.open that contains the version number of the da...

NetworkInformation.rtt - Web APIs
note: this feature is available in web workers. syntax rtt = networkinformation.rtt return value a number. ...
... note: this feature is available in web workers. syntax rtt = networkinformation.rtt return value a number. ...
... note: this feature is available in web workers. syntax rtt = networkinformation.rtt return value a number. ...
... note: this feature is available in web workers. syntax rtt = networkinformation.rtt return value a number. ...

NetworkInformation - Web APIs
the networkinformation interface provides information about the connection a device is using to communicate with the network and provides a means for scripts to be notified if the connection type changes. the networkinformation interfaces cannot be instantiated. it is instead accessed through the connection property of the navigator interface. note: this feature is available in web workers. properties this interface also inherits properties of its parent, eventtarget. networkinformation.downlink read only returns the effective bandwidth estimate in megabits per second, rounded to the nearest multiple of 25 kilobits per seconds. ...
...web workers. properties this interface also inherits properties of its parent, eventtarget. networkinformation.downlink read only returns the effective bandwidth estimate in megabits per second, rounded to the nearest multiple of 25 kilobits per seconds. ...
... networkinformation.downlink read only returns the effective bandwidth estimate in megabits per second, rounded to the nearest multiple of 25 kilobits per seconds. networkinformation.downlinkmax read only returns the maximum downlink speed, in megabits per second (mbps), for the underlying connection technology. networkinformation.effectivetype read only returns the effective type of the connection meaning one of 'slow-2g', '2g', '3g', or '4g'. this value is determined using a combination of recently observed round-trip time and downlink values. networkinformation.rtt read only returns the estimated effective round-trip time of the current connection, rounded to the nearest multiple of 25 milliseconds. networkinformation.savedata read only returns true if the user has set a reduced...
... of recently observed round-trip time and downlink values. networkinformation.rtt read only returns the estimated effective round-trip time of the current connection, rounded to the nearest multiple of 25 milliseconds. networkinformation.savedata read only returns true if the user has set a reduced data usage option on the user agent. networkinformation.type read only returns the type of connection a device is using to communicate with the network. it will be one of the following values: bluetooth cellular ethernet none wifi wimax other unknown event handlers networkinformation.onchange the event that's fired when connection information changes and the change is fired on this object. methods this interface also inherits methods of its parent, eventtarget. ...

PerformanceResourceTiming.requestStart - Web APIs
there is no end property for requeststart. note: this feature is available in web workers. ...
...events are logged. ...
...d. ...
...print_start_and_end_properties(perfentry) { // print timestamps of the performanceentry *start and *end properties properties = ["connectstart", "connectend", "domainlookupstart", "domainlookupend", "fetchstart", "redirectstart", "redirectend", "requeststart", "responsestart", "responseend", "secureconnectionstart"]; for (var i=0; i < properties.length; i++) { // check each property var supported = properties[i] in perfentry; if (supported) { var value = perfentry[properties[i]]; console.log("... " + properties[i] + " = " + value); } else { console.log("... " + properties[i] + " = not supported"); } } } specifications specification status ...

RTCConfiguration.certificates - Web APIs
the rtcconfiguration dictionary's optional certificates property is an array of rtccertificate objects providing the security certificates available for use when authenticating duing the connection process. syntax let rtcconfiguration = { certificates: certificatelist }; let rtcconfiguration.certificates = [ cert1... ]; let certificates = rtcconfiguration.certificates; value an array of rtccertificate objects, each specifying one security certificate available for use when connecting to a remote peer. if this property isn't specified, the browser will automatically generate and use a certificate to secure the connection. see using certificates below for more information on why you might want to—or not to—explicitly provide certificates. description if this property isn't included...
...ote peer. if this property isn't specified, the browser will automatically generate and use a certificate to secure the connection. see using certificates below for more information on why you might want to—or not to—explicitly provide certificates. description if this property isn't included in the configuration, a set of certificates is automatically generated for each instance of rtcpeerconnection. although a given dtls connection only uses a single certificate, providing multiple options in the certificates list may improve the odds of establishing a connection by increasing the chances a mutually-compatible encryption algorithm and key size may be found. the method by which a browser decides which certificate to use is implementation-dependent. some browsers may simply choose the fir...
...ing the chances a mutually-compatible encryption algorithm and key size may be found. the method by which a browser decides which certificate to use is implementation-dependent. some browsers may simply choose the first listed certificate and ignore the rest of the list; others may take a different approach. using certificates when you wish to provide your own certificates for use by an rtcpeerconnection instead of having the rtcpeerconnection generate them automatically, you do so by calling the static rtcpeerconnection.generatecertificate() function. the certificates property's value cannot be changed once it's first specified. if it's included in the configuration passed into a call to a connection's setconfiguration(), it is ignored. this attribute supports providing multiple certificate...
...nnection generate them automatically, you do so by calling the static rtcpeerconnection.generatecertificate() function. the certificates property's value cannot be changed once it's first specified. if it's included in the configuration passed into a call to a connection's setconfiguration(), it is ignored. this attribute supports providing multiple certificates because even though a given dtls connection uses only one certificate, providing multiple certificates allows support for multiple encryption algorithms. the implementation of rtcpeerconnection will choose which certificate to use based on the algorithms it and the remote peer support, as determined during dtls handshake. if you don't provide certificates, new ones are generated automatically. one obvious benefit to providing your own ...

RTCConfiguration.iceServers - Web APIs
vers property is an array of rtciceserver objects, each of which describes a single stun or turn server to use for negotiation purposes. syntax let rtcconfiguration = { iceservers: [ iceserver1... ] }; let rtcconfiguration.iceservers = [ iceserver1... ]; value an array of zero or more rtciceserver objects, each of which describes one stun or turn server for the ice agent to use during the connection's negotiation. each object must at least have an urls property, which is an array of one or more strings, each providing one server's url. if the array is empty, or if the iceservers option isn't specified, the ice agent will negotiate without the use of any servers, which will limit the connection to local peers. description how the list of servers you provide is used is up to the implemen...
... or if the iceservers option isn't specified, the ice agent will negotiate without the use of any servers, which will limit the connection to local peers. description how the list of servers you provide is used is up to the implementation of the user agent. while it can be useful to provide a second server as a fallback in case the first is offline, listing too many servers can delay the user's connection being established, depending on the network's performance and how many servers get used for negotiation before a connection is established. if the list of servers is changed while a connection is already active by calling the the rtcpeerconnection method setconfiguration(), no immediate effect occurs. however, the new list of servers is used for any future renegotiation, such as while handlin...
...the first one, stun:stun.services.mozilla.com, requires authentication, so the username and password are provided. the second server has two urls: stun:stun.example.com and stun:stun-1.example.com. ...
...d stun:stun-1.example.com. var configuration = { iceservers: [{ urls: "stun:stun.services.mozilla.com", username: "louis@mozilla.com", credential: "webrtcdemo" }, { urls: ["stun:stun.example.com", "stun:stun-1.example.com"] }] }; var pc = new rtcpeerconnection(configuration); specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcconfiguration.iceservers' in that specification. candidate recommendation initial definition. ...

RTCDataChannel.send() - Web APIs
different browsers have different limitations on the size of the message you can send. ...
... different browsers have different limitations on the size of the message you can send. ...
...ations exist to define how to automatically fragment large messages, but not all browsers implement them, and those that do have various additional restrictions. this will get less complicated over time, but for now, if you have questions, see understanding message size limits in using webrtc data channels. syntax rtcdatachannel.send(data); parameters data the data to transmit across the connection. this may be a usvstring, a blob, an arraybuffer, or an arraybufferview. return value undefined. exceptions invalidstateerror since the data channel uses a separate transport channel from the media content, it must establish its own connection; if it hasn't finished doing so (that is, its readystate is "connecting"), this error occurs without sending or buffering the data. networkerro...
...of a multi-part object sent using send(). for more information about message size restrictions, see understanding message size limits in using webrtc data channels. example in this example, a routine called sendmessage() is created; it accepts an object as input and sends to the remote peer, over the rtcdatachannel, a json string with the specified object and a time stamp. var pc = new rtcpeerconnection(); var dc = pc.createdatachannel("backchannel"); function sendmessage(msg) { let obj = { "message": msg, "timestamp": new date() } dc.send(json.stringify(obj)); } specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcdatachannel.send()' in that specification. candidate recommendatio...

RTCIceCandidate.candidate - Web APIs
e actually extracted from this string. this property can be configured by specifying the value of the candidate property when constructing the new candidate object using rtcicecandidate(). syntax var candidate = rtcicecandidate.candidate; value a domstring describing the properties of the candidate, taken directly from the sdp attribute "candidate". the candidate string specifies the network connectivity information for the candidate. if the candidate is an empty string (""), the end of the candidate list has been reached; this candidate is known as the "end-of-candidates" marker. the syntax of the candidate string is described in rfc 5245, section 15.1. for an a-line (attribute line) that looks like this: a=candidate:4234997325 1 udp 2043278322 192.168.0.56 44323 typ host the correspondi...
...ring; 2 becomes "rtcp") protocol = "udp" priority = 2043278322 ip = "192.168.0.56" port = 44323 type = "host" example in this example, we see a function which receives as input an sdp string containing an ice candidate received from the remote peer during the signaling process. ...
...bj = new rtcicecandidate(candidatesdp); mypeerconnection.addicecandidate(candidateobj).catch({ /* handle the error thrown by addicecandidate() */ }); } the handlenewicecandidate() function shown here passes the received candidate's sdp text into rtcicecandidate() to receive an rtcicecanddiate object in return, which represents the candidate. the new candidate is then passed into rtcpeerconnection.addicecandidate() to add the candidate to the list of candidates for webrtc to consider using for the connection being established. ...
... new candidate is then passed into rtcpeerconnection.addicecandidate() to add the candidate to the list of candidates for webrtc to consider using for the connection being established. this example could be simplified somewhat; you may more often see the code look something like this, taking advantage of more advanced ecmascript 2016 features: let handlenewicecandidate = candidatesdp => mypeerconnection.addicecandidate(new rtcicecandidate(candidatesdp)); specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcicecandidate.candidate' in that specification. candidate recommendation initial definition. ...

RTCIceServer.credentialType - Web APIs
cicecredentialtype enumerated string type: oauth the rtciceserver requires the use of oauth 2.0 to authenticate in order to use the ice server described. this process is detailed in rfc 7635. this property was formerly called token. password the rtciceserver requires a username and password to authenticate prior to using the described ice server. ...
...the use of oauth 2.0 to authenticate in order to use the ice server described. this process is detailed in rfc 7635. this property was formerly called token. password the rtciceserver requires a username and password to authenticate prior to using the described ice server. example this example creates a new rtcpeerconnection which will use a turn server at turnserver.example.org to negotiate connections. ...
...property was formerly called token. password the rtciceserver requires a username and password to authenticate prior to using the described ice server. example this example creates a new rtcpeerconnection which will use a turn server at turnserver.example.org to negotiate connections. logging into the turn server will use the username "webrtc" and the creative password "turnpassword". ...
...lled token. password the rtciceserver requires a username and password to authenticate prior to using the described ice server. example this example creates a new rtcpeerconnection which will use a turn server at turnserver.example.org to negotiate connections. logging into the turn server will use the username "webrtc" and the creative password "turnpassword". mypeerconnection = new rtcpeerconnection({ iceservers: [ { urls: "turn:turnserver.example.org", // a turn server username: "webrtc", credential: "turnpassword", credentialtype: "password" } ] }); specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtciceserver.credential' in that specification. candidat...

RTCIceTransport.state - Web APIs
or the remote device to begin to transmit the remote candidates, or both. in this state, checking of candidates to look for those which might be acceptable has not yet begun. "checking" at least one remote candidate has been received, and the rtcicetransport has begun examining pairings of remote and local candidates in order to attempt to identify viable pairs that could be used to establish a connection. keep in mind that gathering of local candidates may still be underway, and, similarly, the remote device also may still be gathering candidates of its own. "connected" a viable candidate pair has been found and selected, and the rtcicetransport has connected the two peers together using that pair. however, there are still candidates pairings to consider, and there may still be gathering u...
... similarly, the remote device also may still be gathering candidates of its own. "connected" a viable candidate pair has been found and selected, and the rtcicetransport has connected the two peers together using that pair. however, there are still candidates pairings to consider, and there may still be gathering underway on one or both of the two devices. the transport may revert from the "connected" state to the "checking" state if either peer decides to cancel consent to use the selected candidate pair, and may revert to "disconnected" if there are no candidates left to check but one or both clients are still gathering candidates. "completed" the transport has finished gathering local candidates and has received a notification from the remote peer that no more candidates will be sent...
...lients are still gathering candidates. "completed" the transport has finished gathering local candidates and has received a notification from the remote peer that no more candidates will be sent. in addition, all candidate pairs have been considered and a pair has been selected for use. if consent checks fail on all successful candidate pairs, the transport state will change to "failed". "disconnected" the ice agent has determined that connectivity has been lost for this rtcicetransport. this is not a failure state (that's "failed"). a value of "disconnected" means that a transient issue has occurred that has broken the connection, but that should resolve itself automatically without your code having to take any action. see the disconnected state for additional details. "failed" the rtcic...
... "closed" the transport has shut down and is no longer responding to stun requests. specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcicetransportstate' in that specification. ...

RTCRtpTransceiver.direction - Web APIs
icating the transceiver's preferred direction. the rtcrtptransceiverdirection type is an enumeration of string values. each describes how the transceiver's associated rtcrtpsender and rtcrtpreceiver behave as shown in the table below. value rtcrtpsender behavior rtcrtpreceiver behavior "sendrecv" offers to send rtp data, and will do so if the other peer accepts the connection and at least one of the sender's encodings is active1. offers to receive rtp data, and does so if the other peer accepts. "sendonly" offers to send rtp data, and will do so if the other peer accepts the connection and at least one of the sender's encodings is active1. does not offer to receive rtp data and will not do so. "recvonly" does not offer to send rtp data...
...nder has at least one active encoding, the user agent gets its parameters using rtcrtpsender.getparameters(), then looks at the parameters' encodings property; if any of the listed encodings has its active property set to true, the sender has an active encoding. ...
...ncodings has its active property set to true, the sender has an active encoding. exceptions when setting the value of direction, the following exceptions can occur: invalidstateerror either the receiver's rtcpeerconnection is closed or the rtcrtpreceiver is stopped. usage notes setting the direction when you change the value of direction, an invalidstateerror exception will occur if the connection is closed or the receiver is stopped. ...
...ceptions can occur: invalidstateerror either the receiver's rtcpeerconnection is closed or the rtcrtpreceiver is stopped. usage notes setting the direction when you change the value of direction, an invalidstateerror exception will occur if the connection is closed or the receiver is stopped. if the new value of direction is in fact different from the existing value, renegotiation of the connection is required, so a negotiationneeded event is sent to the rtcpeerconnection. effect on offers and answers the value of direction is used by rtcpeerconnection.createoffer() or rtcpeerconnection.createanswer() in order to generate the sdp generated by each of those methods. the sdp contains an a-line which specifies the directionality. for example, if the direction is specified as "sendrecv", t...

StereoPannerNode.pan - Web APIs
rned value an a-rate audioparam containing the panning to apply. note: though the audioparam returned is read-only, the value it represents is not. example in our stereopannernode example (see source code) html we have a simple <audio> element along with a slider <input> to increase and decrease pan value. in the javascript we create a mediaelementaudiosourcenode and a stereopannernode, and connect the two together using the connect() method. we then use an oninput event handler to change the value of the stereopannernode.pan parameter and update the pan value display when the slider is moved. moving the slider left and right while the music is playing pans the music across to the left and right speakers of the output, respectively. var audioctx = new (window.audiocontext || window.webkit...
... working draft ...
... working draft ...
... working draft ...

StereoPannerNode - Web APIs
only is an a-rate audioparam representing the amount of panning to apply. methods no specific method; inherits methods from its parent, audionode. example in our stereopannernode example (see source code) html we have a simple <audio> element along with a slider <input> to increase and decrease pan value. in the javascript we create a mediaelementaudiosourcenode and a stereopannernode, and connect the two together using the connect() method. we then use an oninput event handler to change the value of the stereopannernode.pan parameter and update the pan value display when the slider is moved. moving the slider left and right while the music is playing pans the music across to the left and right speakers of the output, respectively. var audioctx = new (window.audiocontext || window.webkit...
... working draft initial definiti...
... working draft initial definition ...
... working draft initial definition ...

Migrating from webkitAudioContext - Web APIs
cemodel = "linear"; // linear distance model panner.distancemodel = "inverse"; // inverse distance model panner.distancemodel = "exponential"; // exponential distance model gain control moved to its own node type the web audio standard now controls all gain using the gainnode. instead of setting a gain property directly on an audio source, you connect the source to a gain node and then control the gain using that node's gain parameter. audiobuffersourcenode the gain attribute of audiobuffersourcenode has been removed. the same functionality can be achieved by connecting the audiobuffersourcenode to a gain node. see the following example: // old webkitaudiocontext code: var src = context.createbuffersource(); src.buffer = somebuffer; src.g...
... node and then control the gain using that node's gain parameter. audiobuffersourcenode the gain attribute of audiobuffersourcenode has been removed. the same functionality can be achieved by connecting the audiobuffersourcenode to a gain node. ...
...achieved by connecting the audiobuffersourcenode to a gain node. see the following example: // old webkitaudiocontext code: var src = context.createbuffersource(); src.buffer = somebuffer; src.gain.value = 0.5; src.connect(context.destination); src.noteon(0); // new standard audiocontext code: var src = context.createbuffersource(); src.buffer = somebuffer; var gain = context.creategain(); src.connect(gain); gain.gain.value = 0.5; gain.connect(context.destination); src.start(0); audiobuffer the gain attribute of audiobuffer has been removed. the same functionality can be achieved by connecting the audiobuffersourcenode that owns the buffer to a gain node. see the following example: // old webkitaudiocontext code: var src = context.createbuffersource(); src.buffer = somebuffer; src.buffer...
....value = 0.5; gain.connect(context.destination); src.start(0); audiobuffer the gain attribute of audiobuffer has been removed. the same functionality can be achieved by connecting the audiobuffersourcenode that owns the buffer to a gain node. see the following example: // old webkitaudiocontext code: var src = context.createbuffersource(); src.buffer = somebuffer; src.buffer.gain = 0.5; src.connect(context.destination); src.noteon(0); // new standard audiocontext code: var src = context.createbuffersource(); src.buffer = somebuffer; var gain = context.creategain(); src.connect(gain); gain.gain.value = 0.5; gain.connect(context.destination); src.start(0); removal of audiobuffersourcenode.looping the looping attribute of audiobuffersourcenode has been removed. this attribute was an alias...

Visualizations with Web Audio API - Web APIs
es. note: you can find working examples of all the code snippets in our voice-change-o-matic demo. ...
... the analyser node will then capture audio data using a fast fourier transform (fft) in a certain frequency domain, depending on what you spe...
... the analyser node will then capture audio data using a fast fourier transform (fft) in a certain frequency domain, depending on what you specify as the analysernode.fft...
...ontext.createanalyser() method, for example: var audioctx = new (window.audiocontext || window.webkitaudiocontext)(); var analyser = audioctx.createanalyser(); this node is then connected to your audio source at some point between your source and your destination, for example: source = audioctx.createmediastreamsource(stream); source.connect(analyser); analyser.connect(distortion); distortion.connect(audioctx.destination); note: you don't need to connect the analyser's output to another node for it to work, as long as the input is connected to the source, either directly or via another node. the analyser node will then capture audio data using a fast fourier transform (fft) in a certain frequency domain, depending on what you specify as the analysernode.fftsize property value (if no value...

Using Web Workers - Web APIs
e (see index.html and index2.html) — each one has to spin up the worker using code like the following: var myworker = new sharedworker('worker.js'); one big difference is that with a shared worker you have to communicate via a port object — an explicit port is opened that the scripts can use to communicate with the worker (this is done implicitly in the case of dedicated workers). ...
...with the worker (this is done implicitly in the case of dedicated workers). the port connection needs to be started either implicitly by use of the onmessage event handler or explicitly with the start() method before any messages can be posted. calling start() is only needed if the message event is wired up via the addeventlistener() method. note: when using the start() method to open the port connection, it needs to be called from both the parent thread and the worker thread if two-way communication is needed. sending messages to and from a shared worker now messages can be sent to the worker as before, but the postmessage() method has to be invoked through the port object (again, you'll see similar constructs in both multiply.js and square.js): squarenumber.onchange = function() { mywo...
...worker as before, but the postmessage() method has to be invoked through the port object (again, you'll see similar constructs in both multiply.js and square.js): squarenumber.onchange = function() { myworker.port.postmessage([squarenumber.value,squarenumber.value]); console.log('message posted to worker'); } now, on to the worker. there is a bit more complexity here as well (worker.js): onconnect = function(e) { var port = e.ports[0]; port.onmessage = function(e) { var workerresult = 'result: ' + (e.data[0] * e.data[1]); port.postmessage(workerresult); } } first, we use an onconnect handler to fire code when a connection to the port happens (i.e. when the onmessage event handler in the parent thread is setup, or when the start() method is explicitly called in the parent th...
...ent handler in the parent thread is setup, or when the start() method is explicitly called in the parent thread). we use the ports attribute of this event object to grab the port and store it in a variable. next, we add a message handler on the port to do the calculation and return the result to the main thread. setting up this message handler in the worker thread also implicitly opens the port connection back to the parent thread, so the call to port.start() is not actually needed, as noted above. finally, back in the main script, we deal with the message (again, you'll see similar constructs in both multiply.js and square.js): myworker.port.onmessage = function(e) { result2.textcontent = e.data; console.log('message received from worker'); } when a message comes back through the port f...

HTML5 - Developer guides
ding of more diverse and powerful web sites and applications. this set is sometimes called html5 & friends and often shortened to just html5. designed to be usable by all open web developers, this reference page links to numerous resources about html5 technologies, classified into several groups based on their function. semantics: allowing you to describe more precisely what your content is. connectivity: allowing you to communicate with the server in new and innovative ways. offline and storage: allowing webpages to store data on the client-side locally and operate offline more efficiently. multimedia: making video and audio first-class citizens in the open web. 2d/3d graphics and effects: allowing a much more diverse range of presentation options. performance and integration: providing...
... sheet for beginners who want to master html 5, its elements, event attributes and compatibility. html5-compliant parser the parser, which turns the bytes of an html document into a dom, has been extended and now precisely defines the behavior to use in all cases, even when faced with invalid html. this leads to far greater predictability and interoperability between html5-compliant browsers. connectivity web sockets allows creating a permanent connection between the page and the server and to exchange non-html data through that means. server-sent events allows a server to push events to a client, rather than the classical paradigm where the server could send data only in response to a client's request. webrtc this technology, where rtc stands for real-time communication, allows conne...
...eed for a plugin or an external application. offline & storage offline resources: the application cache firefox fully supports the html5 offline resource specification. most others have offline resource support at some level. online and offline events firefox 3 supports whatwg online and offline events, which let applications and extensions detect whether or not there's an active internet connection, as well as to detect when the connection goes up and down. whatwg client-side session and persistent storage (aka dom storage) client-side session and persistent storage allows web applications to store structured data on the client side. indexeddb indexeddb is a web standard for the storage of significant amounts of structured data in the browser and for high performance searches on this...
...s local files selected by the user. this includes support for selecting multiple files using the <input> of type file html element's new multiple attribute. there also is filereader. multimedia using html5 audio and video the <audio> and <video> elements embed and allow the manipulation of new multimedia content. webrtc this technology, where rtc stands for real-time communication, allows connecting to other people and controlling videoconferencing directly in the browser, without the need for a plugin or an external application. track and webvtt the <track> element allows subtitles and chapters. webvtt is a text track format. 2d/3d graphics and effects canvas tutorial learn about the new <canvas> element and how to draw graphs and other objects in firefox. html5 text api for <ca...

Web Performance
this article, we'll discuss creating a clear business case to convince decision-makers to make the investment.understanding latencylatency is the time it takes for a packet of data to travel from source to a destination. in terms of performance optimization, it's important to optimize to reduce causes of lacency and to test site performance emulating high latency to optimizer for users with lousy connections. this article explains what latency is, how it impacts performance, how to measure latency, and how to reduce it.using dns-prefetchdns-prefetch is an attempt to resolve domain names before resources get requested. this could be a file loaded later or link target a user tries to follow. beginner's tutorials the mdn web performance learning area contains modern, up-to-date tutorials co...
...e features this section provides information on how to use and understand the performance features in your developer tools, including waterfall, call tree, and flame charts. profiling with the built-in profiler learn how to profile app performance with firefox's built-in profiler. ...
...measure it, and how you can optimize applications to make the best use of available bandwidth. the role of tls in performance tls—or https as we tend to call it—is crucial in creating secure and safe user experiences. while hardware has reduced the negative impacts tls has had on server performance, it still represents a substantial slice of the time we spend waiting for browsers to connect to servers. this article explains the tls handshake process, and offers some tips for reducing this time, such as ocsp stapling, hsts preload headers, and the potential role of resource hints in masking tls latency for third parties. reading performance charts developer tools provide information on performance, memory, and network requests. knowing how to read waterfall charts, call trees, tr...
...is feature isn't available everywhere, we'll also show you how you can configure your tooling to use this feature in a widely compatible fashion. controlling resource delivery with resource hints browsers often know better than we do when it comes to resource prioritization and delivery however they're far from clairyovant. native browser features enable us to hint to the browser when it should connect to another server, or preload a resource before the browser knows it ever needs it. when used judiciously, this can make fast experience seem even faster. in this article, we cover native browser features like rel=preconnect, rel=dns-prefetch, rel=prefetch, and rel=preload, and how to use them to your advantage. performance budgets marketing, design, and sales needs, and developer experience, o...

dev/panel - Archive of obsolete content
// retrieve the port var toaddon = event.ports[0]; toaddon.start(); toaddon.postmessage("message from the panel document"); console.log(toaddon); }); communicating with the debugger server the firefox developer tools use a client/server protocol: a tool, such as a javascript debugger or style editor, is the client, and the program being debugged, such as firefox, is the server. clients connect to the server and send it messages to examine and modify the state of the program being debugged. the remote debugging protocol page describes the protocol in detail. when the user opens a panel and the panel is created, the framework calls the panel's setup method. the setup method will be passed a debuggee object, which is a messageport that the add-on can use to exchange messages with the deb...
...src="resource://sdk/dev/volcan.js"></script> </head> <body> <div id = "content"></div> </body> <script src="./my-panel.js"></script> </html> here's a script that uses volcan.js to get the selected tab and display its url: // my-panel.js var content = document.getelementbyid("content"); window.addeventlistener("message", function(event) { var debuggee = event.ports[0]; volcan.connect(debuggee). then(listtabs). then(writetablist); }); function listtabs(root) { return root.listtabs(); } function writetablist(tablist) { content.textcontent = tablist.tabs[tablist.selected].url; } we don't have detailed documentation for volcan.js, but it's coming soon. in the meantime, here's a quick guide. connecting volcan.js provides a global connect() function that takes a me...
.... then(listtabs). then(writetablist); }); function listtabs(root) { return root.listtabs(); } function writetablist(tablist) { content.textcontent = tablist.tabs[tablist.selected].url; } we don't have detailed documentation for volcan.js, but it's coming soon. in the meantime, here's a quick guide. connecting volcan.js provides a global connect() function that takes a messageport connected to the debugger server, and returns a promise which is fulfilled with an object representing the root actor: volcan.connect(debuggee).then(gotroot); function gotroot(root) { // can use root actor here } actors actors in the remote debugging protocol are volcan.js objects. the messages actors can accept are methods of those objects. the message type becomes the method name. for example, the...

Chapter 3: Introduction to XUL—How to build a more intuitive UI - Archive of obsolete content
please be aware that if you attempt to open this sample directly in firefox, it will not run correctly. menus hierarchically structured dropdown menus are the part of the user interface used for frequently accessed functions in an application o...
...autocompletesearch attribute. if you want to use the location bar history, set the value for this to history; if you want it to be the search bar history, use search-history; and if you want it to be another form’s input history, use form-history; this attribute can take one value or multiple space-delimited values. also, in order to actually read in a history for autocomplete, you will need xpconnect privileges, which we will cover in chapter 4. menu list use the menulist element to create a control for making selections from a drop-down list. as shown in listing 17, this is implemented in combination with the menupopup element; it produces output as shown in figure 14. a click reveals the drop-down list; when an item is selected, the values of that item’s label and value attributes are ...
... backward and forward through pages and includes the ability to prevent scripts in embedded frames from accessing outside the frame. for building applications linked to external web pages, this is a more secure and more convenient approach. the tabbrowser element is even more capable than the browser element because it includes the basic tab-handling features from firefox. to use this requires xpconnect privileges, the same as autocomplete does; this will be covered in chapter 4. opening a page if you specify a uri value for the src attribute in the browser element, that uri will be opened by default. if the src attribute's value changes, you can dynamically open a different web page or xul document. functions like back, forward, reload can all be called using the goback(), goforward(), and r...

No Proxy For configuration - Archive of obsolete content
issues, testing and bugs. audience mozilla users, mozilla developers, mozilla testers. overview as browsers rapidly grew in popularity in the mid-90's, many network administrators added proxy servers. initially, proxy servers were used for access control and performance. many networks had limited access to the public network via proxy servers. because the public network was small in scope and connections were slow, a caching proxy could often improve the overall performance. this feature was originally designed as a "blacklist" of sites or domains that was within the intranet, and should not be accessed via the proxy server. due to various limitations, this feature should be used for only the most simple blacklist scenarios. in almost all cases, pac gives better control and flexibility. use...
...epted example domain filters with interior wildcards www.*.com ip address string prefixes 127. or 10.0.* ip addresses with wildcards in quads 10.*.*.* preferences name network.proxy.no_proxies_on default value localhost, 127.0.0.1 by default "localhost" and "127.0.0.1" are excluded, since most people assume these should connect to the local system. note: when ipv6 support is added, additional addresses will need to be added and tested. communicator used "network.proxy.none" limitations no ipv6 support - the backend stores ipv4 addresses as ipv6, but ipv6 formats are not supported. scalability - not usable for local domains with numerous hostnames. not usable for large number of filters (ad blocking). mozilla i...
...s are not supported. scalability - not usable for local domains with numerous hostnames. not usable for large number of filters (ad blocking). mozilla implements this feature with significant limitations, users may find that writing a pac file is more suitable for their needs. testing contributors can test this feature, even without a proxy server, using a "negative proxy server test". proxy connections that fail return an error "the proxy server you have configured cannot be found", so configure your browser to use a non-existent http proxy (hostname: "imaginary", port "80"). test each destination in an http: url. all proxied urls will return errors, all non-proxied connections will be attempted normally (direct connection). hostnames filter test destination result ...

Developing New Mozilla Features - Archive of obsolete content
tree only at the milestone releases is risky if you're doing significant development. something may have changed that will cause you extra work. and you'll miss the early discussion phase when you can add your perspective to the design work. if you absolutely don't have the resources to do this, then plan for extra integration time. work hard to have a developer involved in the core code who is connected to what you are doing if you can’t make this happen, let mozilla.org staff know and we will try to facilitate this. it’s possible developers may not pay much attention to you because they believe your proposed feature is not a high priority, or is not wanted at all, or that you haven’t demonstrated that you understand the codebase and mozilla coding practices well enough for them to spen...
...it’s possible developers may not pay much attention to you because they believe your proposed feature is not a high priority, or is not wanted at all, or that you haven’t demonstrated that you understand the codebase and mozilla coding practices well enough for them to spend a lot of time with you. in some cases the developers may be in error and staff will work to make this clear and get you connected. in other cases, mozilla.org staff may agree with the developers that it does not make sense for them to spend much time assisting with your project. this is a painful setting and we hope it doesn’t happen often. but our developers are a precious commodity and their time is probably the most important resource we have. it’s also possible that a developer is over-worked or on vacation or ju...
...e perfect, chances are that revisions will be requested. if you’ve got a large patch, let the likely reviewers know when they might expect to see it if your timeframe is tight, check out the mozilla roadmap for milestone dates and see if your feature will arrive at a time of furious activity. if so, and if your feature is not of general interest, prepare to be a low priority for a while. get connected with mozilla.org staff mitchell@mozilla.org is a good contact for project management discussions. let us know what you’re doing. if you can find the resources, designate someone on your team as the liaison to mozilla.org for project management issues. review and super-review take time improving the code as requested by the reviewers takes time. poor quality code also takes time. we’ve op...

XUL Events - Archive of obsolete content
es and sections describe the event handler that are valid for most xul elements. the events listeners can be attached using addeventlistener and removed using removeeventlistener. some of the events can be attached using attributes as well. when attaching event listeners using attributes, be aware that only one listener can be attached at a time. any previously attached listeners are disconnected. the attribute name is the event name with an 'on' prefix. xul event reference subpages broadcastthe broadcast event is executed when the attributes of the element (such as a broadcaster) being listened to are changed. the event handler should be placed on an observer.checkboxstatechangethe checkboxstatechange event is executed when the state of a <checkbox> element has changed.
...as been opened, much like the onload event is sent to a window when it is opened. attribute: onpopupshown syncfrompreference this event is sent when the element is being changed because a preference changed, or when an element is initialized from a preference. this event will only be sent to elements connected to a preference and in a prefwindow. this is not a real event instead it is just a function call and must use the attribute syntax. the script may return a value to set the element to a specific value rather than the value of the preference. this event is usually used to adjust the preference value so that it is more suitable for display in the user interface. attribute: onsyncfrom...
... return a value to set the element to a specific value rather than the value of the preference. this event is usually used to adjust the preference value so that it is more suitable for display in the user interface. attribute: onsyncfrompreference synctopreference this event is sent when the element connected to a preference has changed. this event will only be sent to elements connected to a preference and in a prefwindow. this is not a real event instead it is just a function call and must use the attribute syntax. the script may return a value to set the preference to a specific value rather than the value of the element. attribute: onsynctopreference ...

The Implementation of the Application Object Model - Archive of obsolete content
with this question was to say, "rdf exists now. much of it is written. to implement some sort of pluggable system that could do local/remote merging and mimic the functionality of rdf would require a month or two of engineering time that we can't afford to spend." that answer was the incorrect counter to the question. the answer itself implied a concession that some newly-architected system that connected directly into the dom apis would be preferable to rdf if only there were time to engineer it. that is simply not the case. to discover why, let's explore what this pluggable content architecture would have to look like in order to match the feature set and functionality we need. first off, let's consider how we'd figure out what kind of node to instantiate, e.g., a bookmarks folder node vs. a m...
...data is actually exposed. let's go back to the sorting problem and consider a hypothetical situation. suppose we decide we want to cache the sort relationship on our data, so that we don't have to continually resort it as the user hits the column headers in the tree. what we really need in this situation is the ability to take our intermediate representation and form an entirely different set of connections between our data objects. we need the ability to use arcs of a different type to connect our nodes, e.g., rather than chaining the nodes using a "natural order" relationship, it would be advantageous and desirable to be able to add an additional relationship to the nodes, e.g., a "sorted ascending on name" relationship. if we have something like this, then we can perform sorts without tearing...
...t are made to our aggregated intermediate representation of data must be persistent. we must have the ability to add and remove nodes from the tree by saving the changes into the equivalent of a data source that can house the permanent changes (so that they can be sucked in and aggregated like everything else). this implies a need for the ability to make "negative" and "positive" assertions about connections in our tree, i.e., so that we can delete arcs and/or add arcs to the tree. statement #5 when a change is made to aggregated data that falls outside of the domain of an existing data source, it must be possible for that change to be persistently remembered by recording the change into a new data source that can then be read in when the data is re-aggregated in future sessions of the applica...

Extentsions FAQ - Archive of obsolete content
how to customizes toolbar button to coexist in a toolbar palette and status bar? option #3 install status buttons 1.0 <https://addons.mozilla.org/firefox/1272/> "lets you put toolbar buttons at either end of the status-bar. ...
...es anyone know how write a bounce email extension? are you aware of the "mailredirect" extension? it allows bouncing to arbitrary addresses. it seems what you want is a one button access to that extension with a prefilled bounce address, right? could someone make an extension for thunderbird that preview upcomeing events and number of new messages? in our company i write this extension that connects to our groupware server (http). what server should souch extension work gainst? did you mean exchange? how to attach information using the stringproperties of an imap message with out changing the properties? string properties are implemented as imap user flags. however not all servers support user flags, in which case you get reduced functionality as follows: all flags are stored in your lo...
...d address book lacks. ...

TCP/IP Security - Archive of obsolete content
ally, the data produced by a layer is encapsulated in a larger container by the layer below it. the four tcp/ip layers, from highest to lowest, are shown below. application layer. this layer sends and receives data for particular applications, such as domain name system (dns), hypertext transfer protocol (http), and simple mail transfer protocol (smtp). transport layer. this layer provides connection-oriented or connectionless services for transporting application layer services between networks. the transport layer can optionally assure the reliability of communications. transmission control protocol (tcp) and user datagram protocol (udp) are commonly used transport layer protocols. network layer. this layer routes packets across networks. internet protocol (ip) is the fundamental ne...
...tions than transport and application layer controls. ssl tunnel vpns provide the ability to secure both tcp and udp communications including client/server and other network traffic, and therefore act as network layer vpns. data link layer. data link layer controls are applied to all communications on a specific physical link, such as a dedicated circuit between two buildings or a dial-up modem connection to an internet service provider (isp). data link layer controls for dedicated circuits are most often provided by specialized hardware devices known as data link encryptors; data link layer controls for other types of connections, such as dial-up modem communications, are usually provided through software. because the data link layer is below the network layer, controls at this layer can pro...
...he data link layer is below the network layer, controls at this layer can protect both data and ip information. compared to controls at the other layers, data link layer controls are relatively simple, which makes them easier to implement; also, they support other network layer protocols besides ip. because data link layer controls are specific to a particular physical link, they cannot protect connections with multiple links, such as establishing a vpn over the internet. an internet-based connection is typically composed of several physical links chained together; protecting such a connection with data link layer controls would require deploying a separate control to each link, which is not feasible. data link layer protocols have been used for many years primarily to provide additional prot...

WebVR — Virtual Reality for the Web - Game development
playing games. there are many devices to chose from: desktop ones like oculus rift or htc vive, through consoles with playstation vr (which admittedly doesn't support webvr at this time), to mobile experiences like gear vr or google cardboard. note: for more information, read our webvr concepts article. the webvr api the webvr api is the central api for capturing information on vr devices connected to a computer and headset position/orientation/velocity/acceleration information, and converting that into useful data you can use in your games and other applications. note: there are of course other apis useful for creating games, for example the gamepad api for control inputs, and the device orientation api for handling display orientation on mobile. browser support and spec status curr...
... to visit the mozvr.com and webvr.info websites. using the webvr api the webvr api is based on two concepts — sending stereoscopic images to both lenses in your headset and receiving positional data for your head from the sensor, and those two are handled by hmdvrdevice (head-mounted display virtual reality device) and positionsensorvrdevice. ...
...for example: function setcustomfov(up,right,down,left) { var testfov = new vrfieldofview(up,right,down,left); ghmd.setfieldofview(testfov,testfov,0.01,10000.0); } the gpositionsensor variable holds th...

How much does it cost to do something on the Web? - Learn web development
a barebones website, you only need a basic computer capable of launching an editor, and a web browser, so the entry level can be quite low. of course, you'll need a more serious computer if you want to produce complicated designs, touch up photos, or produce audio and video files. you need to upload content to a remote server (see hosting below), so you need a modem. your isp can rent internet connectivity to you for a few dollars per month, though your budget might vary, depending on your location. isp access make sure that you have sufficient bandwidth: low-bandwidth access may be adequate to support a 'simple' website: reasonably-sized images, texts, some css and javascript. that will likely cost you a few dozen dollars, including the rent for the modem. on the other hand, you'll need...
... few dollars per month, though your budget might vary, depending on your location. isp access make sure that you have sufficient bandwidth: low-bandwidth access may be adequate to support a 'simple' website: reasonably-sized images, texts, some css and javascript. that will likely cost you a few dozen dollars, including the rent for the modem. on the other hand, you'll need a high-bandwidth connection, such as dsl, cable, or fiber access, if you want a more advanced website with hundreds of files, or if you want to deliver heavy video/audio files directly from your web server. it could cost the same as low-bandwidth access, upwards to several hundred dollars per month for more professional needs. hosting understanding bandwidth hosting providers charge you according to how much bandwidt...
...on a free host service. professional website agencies and hosting if you desire a professional website, you will likely ask a web agency to do it for you. ...

How do I start to design my website? - Learn web development
you out when you have decisions to make. (should i implement these features, use these services, create these designs?) so now that you have a prioritized list of goals, let's move on to the next question. how could a website bring me to my goals? so you have a list of goals and you feel you need a website to reach those goals. are you sure? let's look back at our example. we have five goals connected to music, one goal related to personal life (finding your significant other), and the completely unrelated cat photos. is it reasonable to build a single website to cover all those goals? is it even necessary? after all, scores of existing web services might bring you to your goals without building a new website. finding a girl/boyfriend is a prime case where it makes more sense to use existin...
...ebsite rather than actually searching for a girl/boyfriend. since our goal is what matters most, we should spend our energy on leveraging existing tools rather than starting from scratch. again, there are so many web services already available for showcasing photos that it isn't worth the effort to build a new site just to spread the word about how cute our cats are. the other five goals are all connected to music. there are, of course, many web services that could handle these goals, but it makes sense in this case to build a dedicated website of our own. such a website is the best way to aggregate all the stuff we want to publish in a single place (good for goals 3, 5, and 6) and promote interaction between us and the public (good for goals 2 and 4). in short, since these goals all revolve aro...
... in this case to build a dedicated website of our own. such a website is the best way to aggregate all the stuff we want to publish in a single place (good for goals 3, 5, and 6) and promote interaction between us and the public (good for goals 2 and 4). in short, since these goals all revolve around the same topic, having everything in one place will help us meet our goals and help our followers connect with us. how can a website help me reach my goals? by answering that, you'll find the best way to reach your goals and save yourself from wasted effort. what needs to be done, and in what order, to reach my goals? now that you know what you want to accomplish, it's time to turn those goals into actionable steps. as a side note, your goals are not necessarily set in stone. they evolve over time...

How the Web works - Learn web development
previous overview: getting started with the web how the web works provides a simplified view of what happens when you view a webpage in a web browser on your computer or phone. this theory is not essential to writing web code in the short term, but before long you'll really start to benefit from understanding what's happening in the background. clients and servers computers connected to the web are called clients and servers. a simplified diagram of how they interact might look like this: clients are the typical web user's internet-connected devices (for example, your computer connected to your wi-fi, or your phone connected to your mobile network) and web-accessing software available on those devices (usually a web browser like firefox or chrome). servers are computers that st...
...d above don't tell the whole story. there are many other parts involved, and we'll describe them below. for now, let's imagine that the web is a road. on one end of the road is the client, which is like your house. on the other end of the road is the server, which is a shop you want to buy something from. in addition to the client and the server, we also need to say hello to: your internet connection: allows you to send and receive data on the web. it's basically like the street between your house and the shop. tcp/ip: transmission control protocol and internet protocol are communication protocols that define how data should travel across the internet. this is like the transport mechanisms that let you place an order, go to the shop, and buy your goods. in our example, this is like a car ...
... the browser goes to the dns server, and finds the real address of the server that the website lives on (you find the address of the shop). the browser sends an http request message to the server, asking it to send a copy of the website to the client (you go to the shop and order your goods). this message, and all other data sent between the client and the server, is sent across your internet connection using tcp/ip. if the server approves the client's request, the server sends the client a "200 ok" message, which means "of course you can look at that website! here it is", and then starts sending the website's files to the browser as a series of small chunks called data packets (the shop gives you your goods, and you bring them back to your house). the browser assembles the small chunks int...

Client-side storage - Learn web development
personalizing site preferences (e.g. showing a user's choice of custom widgets, color scheme, or font size). persisting previous site activity (e.g. storing the contents of a shopping cart from a previous session, remembering if a user was previously logged in). saving data and assets locally so a site will be quicker (and potentially less expensive) to download, or be usable without a network connection. saving web application generated documents locally for use offline often client-side and server-side storage are used together. for example, you could download a batch of music files (perhaps used by a web game or music player application), store them inside a client-side database, and play them as needed. the user would only have to download the music files once — on subsequent visits t...
...omplete sets of customer records to even complex data types like audio or video files. you'll learn more about these apis below. the future: cache api some modern browsers support the new cache api. this api is designed for storing http responses to specific requests, and is very useful for doing things like storing website assets offline so the site can subsequently be used without a network connection. cache is usually used in combination with the service worker api, although it doesn't have to be. use of cache and service workers is an advanced topic, and we won't be covering it in great detail in this article, although we will show a simple example in the offline asset storage section below. storing simple data — web storage the web storage api is very easy to use — you store simpl...
...mple already shows how to create an app that will store large assets in an indexeddb database, avoiding the need to download them more than once. this is already a great improvement to the user experience, but there is still one thing missing — the main html, css, and javascript files still need to be downloaded each time the site is accessed, meaning that it won't work when there is no network connection. this is where service workers and the closely-related cache api come in. a service worker is a javascript file that, simply put, is registered against a particular origin (web site, or part of a web site at a certain domain) when it is accessed by a browser. when registered, it can control pages available at that origin. it does this by sitting between a loaded page and the network and in...

Third-party APIs - Learn web development
saw in the introductory article is accessed using the native audiocontext object. for example: const audioctx = new audiocontext(); ... const audioelement = document.queryselector('audio'); ... const audiosource = audioctx.createmediaelementsource(audioelement); // etc. third party apis, on the other hand, are located on third party servers. to access them from javascript you first need to connect to the api functionality and make it available on your page. this typically involves first linking to a javascript library available on the server via a <script> element, as seen in our mapquest example: <script src="https://api.mqcdn.com/sdk/mapquest-js/v1.3.2/mapquest.js"></script> <link type="text/css" rel="stylesheet" href="https://api.mqcdn.com/sdk/mapquest-js/v1.3.2/mapquest.css"/> you ca...
...ment you want to display the map in ('map'), and an options object containing the details of the particular map we want to display. in this case we specify the coordinates of the center of the map, a map layer of type map to show (created using the mapquest.tilelayer() method), and the default zoom level. this is all the information the mapquest api needs to plot a simple map. the server you are connecting to handles all the complicated stuff, like displaying the correct map tiles for the area being shown, etc. note: some apis handle access to their functionality slightly differently, requiring the developer to make an http request to a specific url pattern to retrieve data. these are called restful apis — we'll show an example later on. they usually require api keys security for browser ...
...an find in the javascript/apis/third-party-apis/nytimes directory. initially the <script> element contains a number of variables needed for the setup of the example; below we'll fill in the required functionality. the app will end up allowing you to type in a search term and optional start and end dates, which it will then use to query the article search api and display the search results. connect the api to your app first, you'll need to make a connection between the api and your app. in the case of this api, you need to include the api key as a get parameter every time you request data from the service at the correct url. find the following line: let key = ' ... '; replace the existing api key with the actual api key you got in the previous section. add the following l...

Aprender y obtener ayuda - Learn web development
ings — focused and diffuse learning: focused learning is what you might more traditionally associate with academic subjects. you concentrate deeply on a low-level topic and solving the specific problems that it brings. you are focused on a narrow area. diffuse learning is more to do with high-level thinking around a wider area. you let your mind wander more widely, and seemingly make random connections between different things. this is more the kind of thinking you do while you are in the shower, or during a coffee break. from the studies that neuroscientists have done on brain activity, we have found out that you can't really engage in both ways of learning — or thinking — at once. so which one should you choose? you might think that focused learning is better for studying, but in re...
... where that information is stored. it isn't however very good at getting an understanding of "the big picture", and unlocking new neural pathways when you are trying to understand new subjects or solve new problems that you haven't come across before. for that, you need diffuse thinking. this is the opposite of focus — you let your brain wander around the wider landscape, searching around for connections you didn't have before, touching on new things (or new combinations of things) that you can then focus on later, to strengthen them and start to really understand what they mean. this is why it is usually good to read some introductory material first to get a high-level understanding of an area before you leap into the specific details. it is also why you can sometimes get really stuck on a...
...swer when you go for a coffee break (or a walk). you might: know how to fix problem a with tool a. know how to fix problem b with tool b. not know how to fix problem c. let's say you focus on problem c for a while and get frustrated because you can't think how to solve it. but then after going on a walk to get some fresh air, you may well find that as your mind wanders, you suddenly make a connection between tool a and tool b, and realize that you can use them together to fix problem c! it isn't always this simple, but it is also surprising how many times this does happen. this also highlights the importance of taking regular breaks when you are studying in front of the computer. different learning materials it is also worth looking at the different types of learning materials that are a...

The "why" of web performance - Learn web development
ly recognize a sluggish site. that is why we care. why care about performance? web performance—and its assocatiated best practices—are vital for your website visitors to have a good experience. in a sense, web performance can be considered a subset of web accessibility. with performance as with accessibility, you consider what device a site visitor is using to access the site and the device connection speed. as an example, consider the loading experience of cnn.com, which at the time of this writing had over 400 http requests with a file size of over 22.6mb. imagine loading this on a desktop computer connected to a fibre optic network. this would seem relatively fast, and the file size would be largely irrelevant. imagine loading that same site using tethered mobile data on a 9 year-ol...
... to load—if it loads at all—with blocking scripts possibly timing out, and adverse cpu impact causing browser crashes if it does load. a 22.6 mb site could take up to 83 seconds to load on a 3g network, with domcontentloaded (meaning the site's base html structure) at 31.86 seconds. and it isn't just the time taken to download that is a major problem. a lot of countries still have internet connections that bill per megabyte. our example 22.6 mb cnn.com experience would cost about 11% of the average indian's daily wage to download. from a mobile device in northwest africa, it might cost two days of an average salary. and if this site were loaded on a us carrier's international roaming plan? the costs would make anyone cry. (see how much your site costs to download.) improve conversion r...
... mobile (where it generally takes longer). these same site visitors begin abandoning slow sites at 3 seconds. the speed at which a site loads is one factor. if the site is slow to react to user interaction, or appears janky, this causes site visitors to lose interest and trust. here's some real-world examples of performance improvements: tokopedia reduced render time from 14s to 2s for 3g connections and saw a 19% increase in visitors, 35% increase in total sessions, 7% increase in new users, 17% increase in active users and 16% increase in sessions per user. rebuilding pinterest pages for performance resulted in a 40% decrease in wait time, a 15% increase in seo traffic and a 15% increase in conversion rate to signup. to build websites and applications people want to use; to at...

Command line crash course - Learn web development
’d strongly recommend trying to install the wsl. you could stick with the default command prompt (cmd), and many tools will work ok, but you’ll find everything easier if you have better parity with unix tools. side note: what's the difference between a command line and a terminal? generally you'll find these two terms used interchangeably. technically, a terminal is software that starts and connects to a shell. a shell is your session and session environment (where things like the prompt and shortcuts might be customised). the command line is the literal line where you enter commands and the cursor blinks. do you have to use the terminal? although there's a great wealth of tools available from the command line, if you're using tools like visual studio code there's also a mass of extension...
...un all these commands directly in that terminal, safe in the knowledge that you won’t break your own machine. a great resource for getting a quick overview of specific terminal commands is tldr.sh. this is a community-driven documentation service, similar to mdn, but specific to terminal commands. in the next section let’s step it up a notch (or several notches in fact) and see how we can connect tools together on the command line to really see how the terminal can be advantageous over the regular desktop user interface. connecting commands together with pipes the terminal really comes into its own when you start to chain commands together using the | (pipe) symbol. let’s look at a very quick example of what this means. we’ve already looked at ls, which outputs the contents of the ...
...s each file or directory on its own line, that effectively gives us a directory and file count. so what is going on here? a general philosophy of (unix) command line tools is that they print text to the terminal (also referred to "printing to standard output" or stdout). a good deal of commands can also read content from streamed input (known as "standard input" or stdin). the pipe operator can connect these inputs and outputs together, allowing us to build up increasingly more complex operations to suit our needs — the output from one command can become the input to the next command. in this case, ls would normally print its output to stdout, but instead ls’s output is being piped into wc, which takes that output as an input, counting the number of lines it contains, and prints that count ...

Command line options
ards compatible. adding this option bypasses downgrade protection. -createprofile profile_name create a new profile in the default directory, but do not start the application. the profile will be named profile_name in the profile manager, the profile_name must not contain spaces ( ). do not run profile_name while running an instance of the application, you can use the -no-remote option to avoid connecting to a running instance. firefox -createprofile joeluser -createprofile "profile_name profile_dir" creates a new profile in the profile_dir directory, but do not start the application. the profile will be named profile_name in the profile manager. note profile_name and profile_dir are quoted together, and are separated by exactly 1 space (as with the previous syntax, profile_name must not co...
...n the profile_dir directory, but do not start the application. the profile will be named profile_name in the profile manager. note profile_name and profile_dir are quoted together, and are separated by exactly 1 space (as with the previous syntax, profile_name must not contain spaces). do not run profile_dir while running an instance of the application. you can use the -no-remote option to avoid connecting to a running instance. firefox -createprofile "joeluser c:\internet\joelusers-moz-profile" note: profile_dir must not exist and you must not already have a profile called profile_name. -migration start with import wizard. -new-instance open new instance, not a new window in running instance, which allows multiple copies of application to be open at a time. firefox -new-instance -p "a...
... debugger). that is different to venkman debugger (see option -venkman). -jsconsole start application with the error console, or, in firefox, the browser console. -purgecaches gecko (layout engine) has a javascript cache, which is not reset on startup, this clears it. -start-debugger-server port firefox only. start the debugger server on port. this will enable another instance of firefox to connect the firefox developer tools to this firefox instance. see the article on remotely debugging firefox desktop. the port argument is optional, and if it is omitted, the server will listen on port 6000. -venkman start with the javascript debugger, venkman, if installed. xulrunner -app /path/to/application.ini start a new process running the xulrunner application at path/to. also works with fire...

Displaying Places information using views
//browser/content/places/places.css" ?> <?xul-overlay href="chrome://browser/content/places/placesoverlay.xul" ?> it's this stylesheet that binds elements with the special type attribute to one of the views. the overlay contains javascript required by the views. it also contains the built-in places context menu and commands, which you may want to take advantage of in your own uses of the views. connecting a view to its data to hook up a built-in view to its data, use the view's special place attribute. note: starting in gecko 2.0, you can't use the place attribute with menus. see menu view for details. you may specify the attribute directly in the xul or set its corresponding property via javascript. its value is the uri of a query, and the data shown in the view are the results of this qu...
...ur view. a caller would pass in a result or a query, and you would execute the query and add your view as an observing client using addobserver(). (that's how the load method of the built-in tree view works.) when you let your view observe the result, the result will in turn set the result property on the given nsinavhistoryresultobserver. you should not set the result property explicitly. to disconnect a viewer from its result, call removeobserver(view) on your result. be careful about reference cycles. the viewer and the result both hold owning references to each other. for these objects to be freed during javascript garbage collection, you must clear this cycle by calling result.removeobserver(view). (for example, the built-in tree view does this automatically. when the tree is destroyed or ...
... collection, you must clear this cycle by calling result.removeobserver(view). (for example, the built-in tree view does this automatically. when the tree is destroyed or a different nsitreeview is associated with the tree, the tree will set the tree property of the old nsitreeview to null. because the object implementing nsitreeview also implements nsinavhistoryresultobserver, the viewer then disconnects itself from the result by calling removeobserver().) is this still right when using nsinavhistoryresultobserver? creating custom tree views custom places tree views can be a lot of work. take a look at using the tree view above to get an idea of what's required. custom nsitreeviews in general are a lot of work, and if you are not familiar with creating custom nsitreeviews, see the custom tree...

PBackground
his is the foundation of how chrome and content processes talk to each other in e10s. the actor tree all live actors exist in a tree. the root of the tree is known as the top-level actor, an instance of one of a small number of top-level protocols. all actors in a tree "live" on the same thread, and can only be used safely from that thread. the top-level actor for most things is pcontent, which connects the main thread of the chrome process to the main thread of a child process. for most purposes this is great, because the dom is already bound to the main thread. but in some cases we don't necessarily want to talk to the main thread. what if i want to talk to a different thread? not every communication between the chrome and content processes necessarily wants to go through the main threads ...
... every communication between the chrome and content processes necessarily wants to go through the main threads of both (or even either) processes. for example, when we are uploading textures from the content process we don't need to go through the main thread of the parent process. instead we can go directly to the compositor thread in the parent process by creating a new top-level protocol that connects the compositor thread in the parent process to the main thread of a child process. this protocol is called pcompositor, and allows us to bypass the main thread of the parent process, which trims the latency of texture uploads since they will not get bogged down if that thread is busy. writing code that works in both chrome and content processes a lot of code "just works" in the content process...
...d pattern seen in some parts of the gecko codebase, looking something like this (try searching for geckoprocesstype_default in dxr): if (xre_getprocesstype() == geckoprocesstype_default) { dothething(arguments); } else { mipdlprotocol->senddothething(arguments); } this can get unwieldy very quickly, so a better solution was needed. pbackground pbackground exists to solve such problems. it connects a designated "background" thread in the chrome process to any other thread in any other process. pbackground allows us to bypass the chrome process's main thread if used from the content process' main thread. bypass both main threads if used from a non-main thread in a content process write process-agnostic code because it can be used even from another thread in the parent process the par...

IPDL Tutorial
amplechild* toplevelchild::allocpexample() { refptr<examplechild*> actor = new examplechild(); return actor.forget(); } virtual bool toplevelchild::deallocpexample(pexamplechild* actor) { ns_release(static_cast<examplechild*>(actor)); return true; } if an object that implements a protocol can't be constructed inside allocpfoo, has been previously constructed and doesn't require an ipdl connection throughout its lifetime, or implements a refcounted protocol where the first form of constructor is not available, there is a second form of sendpfooconstructor which can be used: class examplechild { public: void dosomething() { amanagerchild->sendpexampleconstructor(this, ...); } }; internally, the first constructor form simply calls pexample(parent|child)* actor = allocp...
...ich implement ipdl messages return bool: true for success, and false for catastrophic failure. message implementations should return false from a message implementation if the data is corrupted or otherwise malformed. any time a message implementation returns false, ipdl will immediately begin catastrophic error handling: the communication channels for the child process (tab or plugin) will be disconnected, and the process will be terminated. do not return false from message handlers for "normal" error conditions such as inability to load a network request! normal errors should be signaled with a message or return value. note: the following paragraphs are not yet implemented. ipdl tracks all active protocols between two endpoints. if if the child side crashes or becomes hung: any synchronous ...
...e called on each manager protocol to deallocate any active subprotocols. when a manager protocol is destroyed, any subprotocols will be notified: no further messages will be accepted deallocpsubprotocol will be called on the manager protocol to deallocate any active subprotocols when the toplevel protocol is destroyed, this is equivalent to shutting down the entire ipdl machinery for that connection, because no more messages can be sent and all subprotocols are destroyed. ...

Release phase
re two different protocols you can use to connet with your mercurial repository: http and ssh. be advised that there's an important distinction between them. you can pull using both, but you can only push through ssh. consequently, if you already have a local clone that you pulled using http, you'll need to modify a config file to tell mercurial to push through ssh. let's go over configuring your connection protocols. configuration before you try pushing, you need to tell ssh which username you wish to use for connecting with hg.mozilla.org. this should be your mozilla ldap account name. add the following lines to your ~/.ssh/config file, replacing user@host.domain with your mozilla ldap account name: host hg.mozilla.org user user@host.domain if you have already cloned the remote repositor...
...esting searching for changes changeset: 0:7c543e8f3a6a tag: tip user: your name <email@example.com> date: mon nov 23 18:08:25 2009 +0100 summary: added search bar strings make sure this output is accurate before continuing. once you've made sure the outgoing output is accurate, push this changeset to hg.mozilla.org by running the hg push command. mercurial will connect to the remote repository, authenticate through ssh and send the changesets. the output should look something like this: pushing to ssh://hg.mozilla.org/releases/l10n-central/x-testing searching for changes adding changesets adding manifests adding file changes added 1 changesets with 2 changes to 2 files congratulations! your changeset has been successfully pushed to hg.mozilla.org! you can now ...
...ng in your browser to see the new changeset in the remote repository. troubleshooting ssh if pushing fails, make sure your ~/.ssh/config has the correct user set under the hg.mozilla.org host. this should be your mozilla ldap account name. next, try issuing the following command: $ ssh hg.mozilla.org if ssh is working fine, you should see the following message: no interactive shells allowed here! connection to hg.mozilla.org closed. if you don't see this message, try running the same command in a more verbose mode (with the debugging information): $ ssh -vvv hg.mozilla.org this should tell you why your connection is not succeeding. if you can't figure it out on your own, copy the output of the above command, paste it on http://pastebin.mozilla.org and ask in #l10n on the irc.mozilla.org server. ...

PRIOMethods
the table of i/o methods used in a file descriptor. ...
... the table of i/o methods used in a file descriptor. ...
...number of bytes available for reading. available64 same as previous field, except 64-bit. fsync flush all in-memory buffers of file to permanent store. seek position the file pointer to the desired place. seek64 same as previous field, except 64-bit. fileinfo get information about an open file. fileinfo64 same as previous field, except 64-bit. writev write from a vector of buffers. connect connect to the specified network address. accept accept a connection from a network peer. bind associate a network address with the file descriptor. listen prepare to listen for network connections. shutdown shut down a network connection. recv receive up to the specified number of bytes. send send all the bytes specified. recvfrom receive up to the specified number of bytes and re...

PR_AcceptRead
this parameter is valid only if the function return does not indicate failure. peeraddr a pointer a pointer to a prnetaddr object. ...
...rint32 amount, printervaltime timeout); parameters the function has the following parameters: listensock a pointer to a prfiledesc object representing a socket descriptor that has been called with the pr_listen function, also known as the rendezvous socket. acceptedsock a pointer to a pointer to a prfiledesc object. on return, *acceptedsock points to the prfiledesc object for the newly connected socket. this parameter is valid only if the function return does not indicate failure. peeraddr a pointer a pointer to a prnetaddr object. on return, peeraddr points to the address of the remote socket. the prnetaddr object that peeraddr points to will be in the buffer pointed to by buf. this parameter is valid only if the function return does not indicate failure. buf a pointer to a buffer...
...ough to receive amount bytes of data and two prnetaddr structures (thus allowing the runtime to align the addresses as needed). amount the number of bytes of data to receive. does not include the size of the prnetaddr structures. if 0, no data will be read from the peer. timeout the timeout interval only applies to the read portion of the operation. pr_acceptread blocks indefinitely until the connection is accepted; the read will time out after the timeout interval elapses. returns a positive number indicates the number of bytes read from the peer. the value -1 indicates a failure. the reason for the failure can be obtained by calling pr_geterror. description pr_acceptread accepts a new connection and retrieves the newly created socket's descriptor and the connecting peer's address. ...

JSS FAQ
jss frequently asked questions newsgroup: mozilla.dev.tech.crypto content: what versions of jdk and jce do you suggest? does jss have 64 bit support? is jss fips compliant? is there any sample code and documentation? if i don't call setcipherpolicy, is the domestic policy used by default? my ssl connection is hanging on windows? how can i tell which ssl/tls ciphers jss supports? how can i debug my ssl connection? can you explain jss ssl certificate approval callbacks? can i have multiple jss instances reading separate db's? once jss initialized, i can't get anymore instances with certificatefactory.getinstance(x.509)? is it possible to sign data in java with jss? how do i convert org.mozilla.js...
...nputstream.java jss/samples/pqggen.java jss/samples/pkcs12.java if i don't call setcipherpolicy, is the domestic policy used by default? yes, domestic is the default because we call nss_setdomesticpolicy() during cryptomanager.initialize(). setcipherpolicy does not need to be called by a jss app unless that app wants to limit itself to export-allowed cipher suites. my ssl connection is hanging on windows? nspr makes use of nt vs. windows distinction and provides different nt and windows builds. many netscape products, including nss, have nt and windows builds that are essentially the same except one difference: one is linked with the nt version of nspr and the other is linked with the windows version of nspr. the nt fiber problem affects applications that call blo...
...mponents (essentially all non-fiber builds) or set the environment variable nspr_native_threads_only=1. you can find more information in bugzilla bug 102251 ssl session cache locking issue with nt fibers how can i tell which ssl/tls ciphers jss supports? check http://lxr.mozilla.org/mozilla/source/security/jss/org/mozilla/jss/ssl/sslsocket.java#730 how can i debug my ssl connection? by using the nss tool ssltap can you explain jss ssl certificate approval callbacks? nss has three callbacks related to certificates. jss has two. but jss combines two of the nss callbacks into one. nss's three ssl cert callbacks are: ssl_authcertificatehook sets a callback to authenticate the peer's certificate. it is called instead of nss's routin...

NSS 3.12.6 release notes
which nss 3.12.6 requires. nspr 4.8.4 binary distributions are in https://ftp.mozilla.org/pub/mozilla.org/nspr/releases/v4.8.4/. new in nss 3.12.6 ssl3 & tls renegotiation indication extension (rfc 5746) by default, nss 3.12.6 uses the new tls renegotiation indication extension for tls renegotiation but allows simple ssl/tls connections (without renegotiation) with peers that don't support the tls renegotiation indication extension. the behavior of nss for renegotiation can be changed through api function calls, or with the following environment variables: nss_ssl_enable_renegotiation values: [0|n|n]: ssl_renegotiate_never ...
... nss_ssl_require_safe_negotiation values: 1: requiresafenegotiation = true unset: requiresafenegotiation = false controls whether safe renegotiation indication is required for initial handshake. if true, a connection will be dropped at initial handshake if the peer server or client does not support safe renegotiation. the default setting for this option is false. these options can also be set with the following ssl options: ssloptions.enablerenegotiation ssloptions.requiresafenegotiation new pseudo cipher sui...
... new environment variables sqlite_force_proxy_locking 1 means force always use proxy, 0 means never use proxy, null means use proxy for non-local files only. sslkeylogfile key log file. if set, nss logs rsa pre-master secrets to this file. this allows packet sniffers to decrypt tls connections. see documentation. note: the code must be built with trace defined to use this functionality. bugs fixed the following bugs have been fixed in nss 3.12.6. bug 275744: support for tls compression rfc 3749 bug 494603: update nss's copy of sqlite3 to 3.6.22 to...

NSS Tools sslstrength
the hostname argument must be present. however, the port number is an optional argument, and if not given, will default to the https port (443). ...
...ssl-server, and reports back the encryption cipher and strength used. synopsis 1) sslstrength ciphers 2) sslstrength hostname[:port] [ciphers=xyz] [debug] [verbose] [policy=export|domestic] description the first form simple lists out the possible ciphers. the letter in the first column of the output is used to identify the cipher preferences in the ciphers= command. the second form attempts to connect to the named ssl host. the hostname argument must be present. however, the port number is an optional argument, and if not given, will default to the https port (443). restricting ciphers by default, sslstrength assumes that all the preferences are on, so it will use any preferences in your policy. the enabled ciphersuites will always be printed out before the connection is made. if you want to ...
...rs, where each single character represents a cipher. you can obtain this list of character->cipher mappings by doing 'sslstrength ciphers'. for example, ciphers=bfi will turn on these cipher preferences and turn off all others. policy=export or policy=domestic will set your policies appropriately. policy will default to domestic if not specified. step-up step up is a mode where the connection starts out with 40-bit encryption, but due to a 'change-cipher-spec' handshake, changes to 128-bit encryption. this is only done in 'export mode', with servers with a special certificate. you can tell if you stepped-up, because the output will says 'using export policy', and you'll find the secret key size was 128-bits. prerequisites you should have a cert7.db in the directory in which you ru...

Python binding for NSS
the following module functions were added: ssl.get_ssl_version_from_major_minor ssl.get_default_ssl_version_range ssl.get_supported_ssl_version_range ssl.set_default_ssl_version_range ssl.ssl_library_version_from_name ssl.ssl_library_version_name ssl.get_cipher_suite_info ssl.ssl_cipher_suite_name ssl.ssl_cipher_...
... the following classes were added: sslciphersuiteinfo sslchannelinfo the following class methods were added: certificate.trust_flags certificate.set_trust_attributes sslsocket.set_ssl_version_range sslsocket.get_ssl_version_range sslsocket.get_ssl_channel_info sslsocket.get_negotiated_host sslsocket.connection_info_format_lines sslsocket.connection_info_format sslsocket.connection_info_str sslciphersuiteinfo.format_lines sslciphersuiteinfo.format sslchannelinfo.format_lines sslchannelinfo.format the following class properties were added: certificate.ssl_trust_flags certificate.email_trust_flags certificate.signin...
...view all ref counting, numerous ref counting fixes implement cyclic garbage collection support by adding object traversal and clear methods identify static variables, move to thread local storage remove python-nss specific httplib.py, no longer needed python-nss now compatible with standard library rewrite httplib_example.py to use standard library and illustrate ssl, non-ssl, connection class, http class usage the following classes were added: authkeyid basicconstraints crldistributionpoint crldistributionpts certificateextension generalname signedcrl dn rdn ava certificaterequest the following module functions were added: nss.nss.nss_is_initialized() nss.nss.cert_crl_reason_from_...

NSS Tools sslstrength
the hostname argument must be present. however, the port number is an optional argument, and if not given, will default to the https port (443). ...
...n ssl-server, and reports back the encryption cipher and strength used. synopsis 1) sslstrength ciphers 2) sslstrength hostname[:port] [ciphers=xyz] [debug] [verbose] [policy=export|domestic] description the first form simple lists out the possible ciphers. the letter in the first column of the output is used to identify the cipher preferences in the ciphers= command. the second form attempts to connect to the named ssl host. the hostname argument must be present. however, the port number is an optional argument, and if not given, will default to the https port (443). restricting ciphers by default, sslstrength assumes that all the preferences are on, so it will use any preferences in your policy. the enabled ciphersuites will always be printed out before the connection is made. if you want to t...
...s, where each single character represents a cipher. you can obtain this list of character->cipher mappings by doing 'sslstrength ciphers'. for example, ciphers=bfi will turn on these cipher preferences and turn off all others. policy=export or policy=domestic will set your policies appropriately. policy will default to domestic if not specified. step-up step up is a mode where the connection starts out with 40-bit encryption, but due to a 'change-cipher-spec' handshake, changes to 128-bit encryption. this is only done in 'export mode', with servers with a special certificate. you can tell if you stepped-up, because the output will says 'using export policy', and you'll find the secret key size was 128-bits. prerequisites you should have a cert7.db in the directory in which you run...

Rhino Examples
the jsdoc.js script is a javascript analog to java's javadoc. it makes heavy use of regular expressions. ...
...the jsdoc.js script is a javascript analog to java's javadoc. it makes heavy use of regular expressions. ...
...the jsdoc.js script is a javascript analog to java's javadoc. it makes heavy use of regular expressions. ...

Components.lastResult
most interfaces only return one success code -- ns_ok -- so components.lastresult is rarely necessary. ...
...most interfaces only return one success code -- ns_ok -- so components.lastresult is rarely necessary. ...
...ly return one success code -- ns_ok -- so components.lastresult is rarely necessary. in cases where components.lastresult is used, it is best to get it right away after the target call is made and save it in a local variable to test its value rather than doing multiple tests against components.lastresult. this is because many 'components' properties and methods are themselves implemented using xpconnect and subsequent calls to components.lastresult might reflect the result of 'implicit' xpconnect calls rather than the result of the target call. example in the following example, the local variable i contains the actual result returned by bar() (assuming that bar() is called via xpconnect), and components.lastresult contains the success code returned by bar(). // given that foo.bar is a method ...

Components object
re. warning: this object is only intended for code running with chrome privileges. exposing the object to regular web code was a mistake. if you use this object on your web page, your site might break at any time! in current versions of firefox only a few interfaces required for compatibility are still accessible. don't use components! the components object is the object through which xpconnect functionality is reflected into javascript. the components object is actually a native instance of the nsixpccomponents interface which is reflected into javascript as a top level object using xpconnect. some properties of components require advanced privileges and may not work in web pages. the components object has the following members: classes array of classes by contractid class...
...ich is reflected into javascript as a top level object using xpconnect. some properties of components require advanced privileges and may not work in web pages. ...
... utils.cre...

nsIBadCertListener2
1.0 66 introduced gecko 1.9 inherits from: nsisupports last changed in gecko 1.9 (firefox 3) replaces the obsolete nsibadcertlistener interface. ...
...(in nsiinterfacerequestor socketinfo, in nsisslstatus status, in autf8string targetsite); methods notifycertproblem() called in case of a broken ssl status. boolean notifycertproblem( in nsiinterfacerequestor socketinfo, in nsisslstatus status, in autf8string targetsite ); parameters socketinfo a network communication context that can be used to obtain more information about the active connection. this object usually supports nsisslsocketcontrol, nsitransportsecurityinfo, nsiidentityinfo, nsisslstatusprovider, nsiclientauthuserdecision and possibly other interfaces. status the ssl status object that describes the problem(s). targetsite the site name that was used to open the current connection. return value the consumer shall return true if it wants to suppress the error message relat...
... supports nsisslsocketcontrol, nsitransportsecurityinfo, nsiidentityinfo, nsisslstatusprovider, nsiclientauthuserdecision and possibly other interfaces. status the ssl status object that describes the problem(s). targetsite the site name that was used to open the current connection. return value the consumer shall return true if it wants to suppress the error message related to the bad cert (the connection will still get canceled). see also nsisockettransport ...

nsIContentPrefService
useful for accessing and manipulating preferences in ways that are caller-specific or for which there is not yet a generic method, although generic functionality useful to multiple callers should generally be added to this unfrozen interface. also useful for testing the database creation and migration code...
...useful for accessing and manipulating preferences in ways that are caller-specific or for which there is not yet a generic method, although generic functionality useful to multiple callers should generally be added to this unfrozen interface. also useful for testing the database creation and migration code. read only. gro...
...oid removeobserver(in astring aname, in nsicontentprefobserver aobserver); void removepref(in nsivariant agroup, in astring aname); void removeprefsbyname(in astring aname); void setpref(in nsivariant agroup, in astring aname, in nsivariant avalue); attributes attribute type description dbconnection mozistorageconnection the database connection to the content preferences database. useful for accessing and manipulating preferences in ways that are caller-specific or for which there is not yet a generic method, although generic functionality useful to multiple callers should generally be added to this unfrozen interface. also useful for testing the database creation and migration code. read only. grouper nsicontenturigroupe...

nsIFormHistory2
read only. hasentries boolean returns true if the form history has any entries. read only. methods addentry() adds a name and value pair to the form history. void addentry( in astring name, in astring value ); parameters name value entryexists() gets whether a name and value pair exists ...
...read only. hasentries boolean returns true if the form history has any entries. read only. methods addentry() adds a name and value pair to the form history. void addentry( in astring name, in astring value ); parameters name value entryexists() gets whether a name and value pair exists in the form history. b...
...read only. ...

nsISocketProvider
afiledesc, out nsisupports asecurityinfo); native code only! constants constant value description proxy_resolves_host 1 << 0 this flag is set if the proxy is to perform hostname resolution instead of the client. when set, the hostname parameter passed in this interface will be used instead of the address structure passed for a later request. anonymous_connect 1 << 1 when setting this flag, the socket will not apply any credentials when establishing a connection. for example, an ssl connection would not send any client-certificates if this flag is set. methods native code only!addtosocket this function is called to allow the socket provider to layer a prfiledesc (a file descriptor) on top of another prfiledesc. for example, ssl via a socks...
...ception of afiledesc, which is an input parameter instead. void addtosocket( in long afamily, in string ahost, in long aport, in string aproxyhost, in long aproxyport, in unsigned long aflags, in prfiledescstar afiledesc, out nsisupports asecurityinfo ); parameters afamily the address family for this socket (pr_af_inet or pr_af_inet6). ahost the hostname for this connection. aport the port for this connection. aproxyhost if non-null, the proxy hostname for this connection. aproxyport the proxy port for this connection. aflags control flags that govern this connection (see constants). afiledesc the existing prfiledesc. asecurityinfo any security info that should be associated with afiledesc. this object typically imp...
...rityinfo. native code only!newsocket creates a new socket. void newsocket( in long afamily, in string ahost, in long aport, in string aproxyhost, in long aproxyport, in unsigned long aflags, out prfiledescstar afiledesc, out nsisupports asecurityinfo ); parameters afamily the address family for this socket (pr_af_inet or pr_af_inet6). ahost the hostname for this connection. aport the port for this connection. aproxyhost if non-null, the proxy hostname for this connection. aproxyport the proxy port for this connection. aflags control flags that govern this connection (see constants) afiledesc the resulting prfiledesc. asecurityinfo any security info that should be associated with afiledesc. this object typically imp...

XPCOM Interface Reference
verimgiencoderimgiloaderimgirequestinidomutilsjsdistackframemoziasyncfaviconsmoziasynchistorymozicoloranalyzermozijssubscriptloadermozipersonaldictionarymoziplaceinfomoziplacesautocompletemoziregistrymozirepresentativecolorcallbackmozispellcheckingenginemozistorageaggregatefunctionmozistorageasyncstatementmozistoragebindingparamsmozistoragebindingparamsarraymozistoragecompletioncallbackmozistorageconnectionmozistorageerrormozistoragefunctionmozistoragependingstatementmozistorageprogresshandlermozistorageresultsetmozistoragerowmozistorageservicemozistoragestatementmozistoragestatementcallbackmozistoragestatementparamsmozistoragestatementrowmozistoragestatementwrappermozistoragevacuumparticipantmozistoragevaluearraymozitxttohtmlconvmozithirdpartyutilmozivisitinfomozivisitinfocallbackmozivisitstatus...
...eckedcomponentnsiseekablestreamnsiselectionnsiselection2nsiselection3nsiselectioncontrollernsiselectionimageservicensiselectionprivatensiserversocketnsiserversocketlistenernsiservicemanagernsisessionstartupnsisessionstorensisimpleenumeratornsismsdatabaseservicensismsrequestmanagernsismsservicensisocketprovidernsisocketproviderservicensisockettransportnsisockettransportservicensisoundnsispeculativeconnectnsistackframensistandardurlnsistreamconverternsistreamlistenernsistringbundlensistringbundleoverridensistringbundleservicensistringenumeratornsistructuredclonecontainernsistylesheetservicensisupportsnsisupports proxiesnsisupportsarraynsisupportscstringnsisupportscharnsisupportsdoublensisupportsfloatnsisupportsidnsisupportsinterfacepointernsisupportsprboolnsisupportsprint16nsisupportsprint32nsisupp...
...dowcreatornsiwindowmediatornsiwindowwatchernsiwindowsregkeynsiwindowsshellservicensiworkernsiworkerfactorynsiworkerglobalscopensiworkermessageeventnsiworkermessageportnsiworkerscopensiwritablepropertybagnsiwritablepropertybag2nsixformsmodelelementnsixformsnsinstanceelementnsixformsnsmodelelementnsixmlhttprequestnsixmlhttprequesteventtargetnsixmlhttprequestuploadnsixpcexceptionnsixpcscriptablensixpconnectnsixsltexceptionnsixsltprocessornsixsltprocessorobsoletensixulappinfonsixulbrowserwindownsixulbuilderlistenernsixulruntimensixulsortservicensixultemplatebuildernsixultemplatequeryprocessornsixultemplateresultnsixulwindownsixmlrpcclientnsixmlrpcfaultnsizipentrynsizipreadernsizipreadercachensizipwriternsmsgfilterfileattribvaluensmsgfolderflagtypensmsgjunkstatusnsmsgkeynsmsglabelvaluensmsgpriorityval...

Performance
current version if you are having problems. caching sqlite has a cache of database pages in memory. it keeps pages associated with the current transaction so it can roll them back, and it also keeps recently used ones so it can run faster. in the past, it flushed the cache at the end of a transaction (by default). in order to keep the cache active between transactions, you needed to have a second connection with a 'dummy' (and schema changing) transaction. that is not needed now. you can control the size of the memory cache using the cache_size pragma. this value controls the number of pages of the file that can be kept in memory at once. the page size can be set using the page_size pragma before any operations have been done on the file. you can see an example of setting the maximum cache size t...
...he cache_size pragma. this value controls the number of pages of the file that can be kept in memory at once. the page size can be set using the page_size pragma before any operations have been done on the file. you can see an example of setting the maximum cache size to be a percentage of memory in nsnavhistory::initdb in toolkit/components/places/src/nsnavhistory.cpp. sharding the cache between connections by default, storage enables the sqlite shared-cache mode which makes multiple connections to the same database share the same cache. the cache is threadsafe. all you need to do is use services.storage.opendatabase(file). some features (virtual tables, full text indexes) are not compatible with shared cache - then you need to use services.storage.openunshareddatabase(file), which doesn't share...
...t writing 0s to disk in an "aci" database is still slow. this made shutdown very slow because the asyncio thread would block shutdown (bug 328598). shutdown times of more than 30 seconds were seen. as a result, this bug introduced incremental history expiration eliminating the need to write many 0s to disk on shutdown. unfortunately, this operation cannot be controlled on a per-transaction or per-connection basis. some operations will benefit, while others will be hurt. ...

xptcall FAQ
ssembly language code. it is used to facilitate cross language and cross thread method calls. porting this code is required in order to make mozilla run on any given platform. why does xptcall exist? xptcall exists for two reasons: to support invoking arbitrary methods on xpcom interfaces. to support dynamically impersonating any xpcom interface. both of these facilities are required by xpconnect. these facilities are also used by xpcom/proxy. it may also be used by other subsystems in the future. the xptcall approach was chosen over an approach that would have required generating stub code for calling and implementing all interfaces. though the chosen approach requires some core platform specific code, it has minimal footprint and is extendable to work with any valid xpcom interface wit...
...s* that, pruint32 methodindex, pruint32 paramcount, nsxptcvariant* params); nsxptcvariant is a discriminated union of the types that can be passed as parameters to the target function (including void* to represent arbitrary pointer types). given the correct set of parameters, this function can call any method on any xpcom interface. xpconnect uses information from typelib files to reflect arbitrary xpcom interfaces into javascript and to make calls from javascript to xpcom using xptc_invokebyindex. the information in the typelibs allows xpconnect to convert function parameters and build the nsxptcvariant array required to make this call. the stubs (or impersonation) facility of xptcall allows for implementing a class which can, at ru...
...edible ideas about how to get the required functionality in a cross platform way and/or without resorting to assembly code i'd love to hear about it. is xptcall a platform requirement for mozilla? yes. mozilla will not run properly without a functioning port of xptcall. non-functional stub code exists to allow building xptcall on non-supported platforms. but any browser feature that relies on xpconnect will fail. any platform that does not do xptcall is in trouble. we need to get moving on getting xptcall working everywhere! what platforms are supported? the growing list: porting status where can i find other resources? the code is at: xpcom/reflect/xptcall a new porting guide is at: https://developer.mozilla.org/en/xptcall_porting_guide pre-implementation proposals are here and here...

Xptcall Porting Guide
porters of this functionality implement the platform specific code for the stub methods that fill the vtbl for ...
...red rather than battle the compiler over what would happen to the stack before my asm code began running. i believe that the non-assembly parts of these files can be copied and reused with minimal (but not zero) platform specific tweaks. feel free to copy and paste as necessary. please remember that safety and reliability are more important than speed optimizations. this code is primarily used to connect xpcom components with javascript; function call overhead is a tiny part of the time involved. i put together xptcall/src/md/test as a place to evolve the basic functionality as a port is coming together. not all of the functionality is exercised, but it is a place to get started. xptcall/tests has an api level test for ns_invokebyindex, but no tests for the stubs functionality. such a test ought ...
...md/test as a place to evolve the basic functionality as a port is coming together. not all of the functionality is exercised, but it is a place to get started. xptcall/tests has an api level test for ns_invokebyindex, but no tests for the stubs functionality. such a test ought to be written, but this has not yet been done. a full 'test' at this point requires building the client and running the xpconnect test called testxpc in mozilla/js/src/xpconnect/tests. getting these ports done is very important. please let me know if you are interested in doing one. i'll answer any questions as i get them. porting status original author: john bandhauer, 31 may 1999. ...

xpidl
pyxpidl has been used for some time now, but now this older tool has been fully retired. xpidl is based on the libidl idl compiler from the gnome project. ...
...pyxpidl has been used for some time now, but now this older tool has been fully retired. xpidl is based on the libidl idl compiler from the gnome project. ...
...yi) -t create a typelib of a specific version number -i add entry to start of include path for ``#include "nsithing.idl" -o use basename (e.g. ...

Inspecting web sockets - Firefox Developer Tools
clicking on a web socket request opens the usual sidebar to reveal additional details. ...
... clicking on a web socket request opens the usual sidebar to reveal additional details. ...
...y to inspect web socket connections. this article explores what functionality the web socket inspector makes available. accessing the inspector when you are inspecting a web app that utilizes a web socket connection, the web socket requests are listed in the list of requests in the network monitor along with all other requests. you can use the ws button to filter the list for just web socket connections. only requests with the 101 status code (websocket protocol handshake) are visible, which indicates that the server is switching to a web socket connection. clicking on a web socket request opens the usual sidebar to reveal additional details. choose the reponse tab to inspect web socket frames sent and received through the selected connection. the live-updated table shows data for sent (...

Firefox Developer Tools
style editor view and edit css styles for the current page. taking screenshots take a screenshot of the entire page or of a single element. measure a portion of the page measure a specific area of a web page. rulers overlay horizontal and vertical rulers on a web page for the latest developer tools and features, try firefox developer edition. download firefox developer edition connecting the developer tools if you open the developer tools using keyboard shortcuts or the equivalent menu items, they'll target the document hosted by the currently active tab. but you can attach the tools to a variety of other targets, too, both within the current browser and in different browsers or even different devices. about:debugging debug add-ons, content tabs, and workers running in t...
...oper tools if you open the developer tools using keyboard shortcuts or the equivalent menu items, they'll target the document hosted by the currently active tab. but you can attach the tools to a variety of other targets, too, both within the current browser and in different browsers or even different devices. about:debugging debug add-ons, content tabs, and workers running in the browser. connecting to firefox for android connect the developer tools to an instance of firefox running on an android device. connecting to iframes connect the developer tools to a specific iframe in the current page. connecting to other browsers connect the developer tools to chrome on android and safari on ios. debugging the browser by default, the developer tools are attached to a web page or web app...
...this is useful for browser and add-on development. browser console see messages logged by the browser itself and by add-ons, and run javascript code in the browser's scope. browser toolbox attach the developer tools to the browser itself. ...

AudioContext.createMediaElementSource() - Web APIs
so playi...
...so playing/pausing the media can still be done through the media element api and the player controls. specifications specification status comment web a...
... cury = (window.event) ? e.pagey : event.clienty + (document.documentelement.scrolltop ? document.documentelement.scrolltop : document.body.scrolltop); gainnode.gain.value = cury/height; } // connect the audiobuffersourcenode to the gainnode // and the gainnode to the destination, so we can play the // music and adjust the volume using the mouse cursor source.connect(gainnode); gainnode.connect(audioctx.destination); note: as a consequence of calling createmediaelementsource(), audio playback from the htmlmediaelement will be re-routed into the processing graph of the audiocontext. so playing/pausing the media can still be done through the media element api and the player controls. specifications specification status comment web audio apithe definition of 'c...

AudioWorkletNode.port - Web APIs
the read-only port property of the audioworkletnode interface returns the associated messageport. it can be used to communicate between the node and its associated audioworkletprocessor. note: the port at the other end of the channel is available under the port property of the processor. syntax audioworkletnodeinstance.port; value the messageport object that is connecting the audioworkletnode and its associated audioworkletprocessor. examples to demonstrate bidirectional communication capabilities, we'll create an audioworkletprocessor, which will output silence and respond to ping requests from its audioworkletnode. first, we need to define a custom audioworkletprocessor, and register it. note that that this should be done in a separate file. // ping-pong-processor.js class...
... const audiocontext = new audiocontext() await audiocontext.audioworklet.addmodule('ping-pong-processor.js') const pingpongnode = new audioworkletnode(audiocontext, 'ping-pong-processor') // send the message containing 'ping' string // to the audioworkletprocessor from the audioworkletnode every second setinterval(() => pingpongnode.port.postmessage('ping'), 1000) ping...
... specifications specification status comment web audio apithe definition of 'port' in that specification. working draft ...

AudioWorkletProcessor.port - Web APIs
the read-only port property of the audioworkletprocessor interface returns the associated messageport. it can be used to communicate between the processor and the audioworkletnode to which it belongs. note: the port at the other end of the channel is available under the port property of the node. syntax audioworkletprocessorinstance.port; value the messageport object that is connecting the audioworkletprocessor and the associated audioworkletnode. examples to demonstrate bidirectional communication capabilities, we'll create an audioworkletprocessor, which will output silence and respond to ping requests from its audioworkletnode. first, we need to define a custom audioworkletprocessor, and register it. note that that this should be done in a separate file. // ping-pong-proc...
... const audiocontext = new audiocontext() await audiocontext.audioworklet.addmodule('ping-pong-processor.js') const pingpongnode = new audioworkletnode(audiocontext, 'ping-pong-processor') // send the message containing 'ping' string // to the audioworkletprocessor from the audioworkletnode every second setinterval(() => pingpongnode.port.postmessage('ping'), 1000) ping...
... specifications specification status comment web audio apithe definition of 'port' in that specification. working draft ...

AudioWorkletProcessor.process - Web APIs
therefore, you must always check the size of the sample array rather than assuming a particular size. this size may even be allowed to change over time, so you mustn't look at just the first block and assume the sample buffers will always be the same size. syntax var isactivelyprocessing = audioworkletprocessor.process(inputs, outputs, parameters); parameters inputs an array of inputs connected to the node, each item of which is, in turn, an array of channels. each channel is a float32array containing 128 samples. for example, inputs[n][m][i] will access n-th input, m-th channel of that input, and i-th sample of that channel. each sample value is in range of [-1 .. 1]. the number of inputs and thus the length of that array is fixed at the construction of the node (see audioworklet...
... turn, an array of channels. each channel is a float32array containing 128 samples. for example, inputs[n][m][i] will access n-th input, m-th channel of that input, and i-th sample of that channel. each sample value is in range of [-1 .. 1]. the number of inputs and thus the length of that array is fixed at the construction of the node (see audioworkletnodeoptions). if there is no active node connected to the n-th input of the node, inputs[n] will be an empty array (zero input channels available). the number of channels in each input may vary, depending on channelcount and channelcountmode properties. outputs an array of outputs that is similar to the inputs parameter in structure. it is intended to be filled during the execution of the process() method. each of the output channels is f...
...ed (there's no way to call play on the same audiobuffersourcenode again). a node that transforms its input. a processor implementing such a node should return false from the process method to allow the presence of active input nodes and references to the node to determine whether it can be garbage-collected. an example of a node with this behaviour is the gainnode. as soon as there are no inputs connected and references retained, gain can no longer be applied to anything, so it can be safely garbage-collected. a node that transforms its input, but has a so-called tail-time — this means that it will produce an output for some time even after its inputs are disconnected or are inactive (producing zero-channels). a processor implementing such a node should return true from the process method for...

BaseAudioContext.createGain() - Web APIs
gainnode.gain.setvalueattime(0, audioctx.currenttime); mute.id = "activated"; mute.innerhtml = "unmute";...
... gainnode.gain.setvalueattime(0, audioctx.currenttime); mute.id = "activated"; mute.innerhtml = "unmute"; } else { gainnode.gai...
... callback function(err) { console.log('the following gum error occured: ' + err); } ); } else { console.log('getusermedia not supported on your browser!'); } source.connect(gainnode); gainnode.connect(audioctx.destination); ... mute.onclick = voicemute; function voicemute() { if(mute.id == "") { // 0 means mute. if you still hear something, make sure you haven't // connected your source into the output in addition to using the gainnode. gainnode.gain.setvalueattime(0, audioctx.currenttime); mute.id = "activated"; mute.innerhtml = "unmute"; } else { gainnode.gain.setvalueattime(1, audioctx.currenttime); mute.id = ""; mute.innerhtml = "mute"; } } specifications specification status comment web audio apithe definit...

Broadcast Channel API - Web APIs
they can “subscribe” to a particular channel by constructing their own broadcastchannel with the same name, and have bi-directional communication between all of them. broadcast channel interface creating or joining a channel a client joins a broadcast channel by creating a broadcastchannel object. its constructor takes one single parameter: the name of the channel. if it is the first to connect to that broadcast channel name, the underlying channel is created. // connection to a broadcast channel const bc = new broadcastchannel('test_channel'); sending a message it is enough to call the postmessage() method on the created broadcastchannel object, which takes any object as an argument. an example string message: // example of sending of a very simple message bc.postmessage('this is ...
...// example of sending of a very simple message bc.postmessage('this is a test message.'); any kind of object can be sent, not just a domstring. the api doesn't associate any semantics to messages, so it is up to the code to know what kind of messages to expect and what to do with them. ...
... up to the code to know what kind of messages to expect and what to do with them. receiving a message when a message is posted, a message event is dispatched to each broadcastchannel object connected to this channel. a function can be run for this event with the onmessage event handler: // a handler that only logs the event to the console: bc.onmessage = function (ev) { console.log(ev); } disconnecting a channel to leave a channel, call the close() method on the object. this disconnects the object from the underlying channel, allowing garbage collection. // disconnect the channel bc.close(); conclusion the broadcast channel api's self-contained interface allows cross-context communication. it can be used to detect user actions in other tabs within a same origin, like when the user logs ...

CanvasRenderingContext2D.arcTo() - Web APIs
the canvasrenderingcontext2d.arcto() method of the canvas 2d api adds a circular arc to the current sub-path, using the given control points and radius. the arc is automatically connected to the path's latest point with a straight line, if necessary for the specified parameters. this method is commonly used for making rounded corners. note: be aware that you may get unexpected results when using a relatively large radius: the arc's connecting line will go in whatever direction it must to meet the specified radius. syntax void ctx.arcto(x1, y1, x2, y2, radius); parameters x1 the x-axis coordinate of the first control point. y1 the y-axis coordinate of the first control point. x2 the x-axis coordinate of the second control point. y2 the y-axis coordinate of the second control poi...
...ontrol points are red, and the start point is blue. creating a rounded corner this example creates a rounded corner using arcto(). this is one of the method's most common uses. html <canvas id="canvas"></canvas> javascript the arc begins at the point specified by moveto(): (230, 20). it is shaped to fit control points at (90, 130) and (20, 20), and has a radius of 50. the lineto() method connects the arc to (20, 20) with a straight line. note that the arc's second control point and the point specified by lineto() are the same, which produces a totally smooth corner. const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); const p0 = { x: 230, y: 20 } const p1 = { x: 90, y: 130 } const p2 = { x: 20, y: 20 } const labelpoint = function (p) { const offs...
...5; ctx.filltext('(' + p.x + ',' + p.y + ')', p.x + offset, p.y + offset); } ctx.beginpath(); ctx.moveto(p0.x, p0.y); ctx.arcto(p1.x, p1.y, p2.x, p2.y, 50); ctx.lineto(p2.x, p2.y); labelpoint(p0); labelpoint(p1); labelpoint(p2); ctx.stroke(); result result of a large radius if you use a relatively large radius, the arc may appear in a place you didn't expect. in this example, the arc's connecting line goes above, instead of below, the coordinate specified by moveto(). this happens because the radius is too large for the arc to fit entirely below the starting point. html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.beginpath(); ctx.moveto(180, 90); ctx.arcto(180,130, 110,130, 130); ctx.lineto(11...

CanvasRenderingContext2D.lineJoin - Web APIs
the canvasrenderingcontext2d.linejoin property of the canvas 2d api determines the shape used to join two line segments where they meet. this property has no effect wherever two connected segments have the same direction, because no joining area will be added in this case. degenerate segments with a length of zero (i.e., with all endpoints and control points at the exact same position) are also ignored. note: lines can be drawn with the stroke(), strokerect(), and stroketext() methods. ...
...are also ignored. note: lines can be drawn with the stroke(), strokerect(), and stroketext() methods. syntax ctx.linejoin = "bevel" || "round" || "miter"; options there are three possible values for this property: "round", "bevel", and "miter". the default is "miter". ...
...options there are three possible values for this property: "round", "bevel", and "miter". the default is "miter". "round" rounds off the corners of a shape by filling an additional sector of disc centered at the common endpoint of connected segments. the radius for these rounded corners is equal to the line width. "bevel" fills an additional triangular area between the common endpoint of connected segments, and the separate outside rectangular corners of each segment. "miter" connected segments are joined by extending their outside edges to connect at a single point, with the effect of filling an additional lozenge-shaped area. this setting is affected by the miterlimit property. default value. examples changing the joins in a path this example applies rounded line joins to a path.

GainNode.gain - Web APIs
gainnode.gain.setvalueattime(0, audioctx.currenttime); mute.id = "activated"; mute.innerhtml = "unmute";...
... gainnode.gain.setvalueattime(0, audioctx.currenttime); mute.id = "activated"; mute.innerhtml = "unmute"; } else { gainnode.gai...
... callback function(err) { console.log('the following gum error occured: ' + err); } ); } else { console.log('getusermedia not supported on your browser!'); } source.connect(gainnode); gainnode.connect(audioctx.destination); ... mute.onclick = voicemute; function voicemute() { if(mute.id == "") { // 0 means mute. if you still hear something, make sure you haven't // connected your source into the output in addition to using the gainnode. gainnode.gain.setvalueattime(0, audioctx.currenttime); mute.id = "activated"; mute.innerhtml = "unmute"; } else { gainnode.gain.setvalueattime(1, audioctx.currenttime); mute.id = ""; mute.innerhtml = "mute"; } } specifications specification status comment web audio apithe definit...

GainNode - Web APIs
gainnode.gain.setvalueattime(0, audioctx.currenttime); mute.id = "activated"; mute.innerhtml = "unmute";...
... gainnode.gain.setvalueattime(0, audioctx.currenttime); mute.id = "activated"; mute.innerhtml = "unmute"; } else { gainnode.gai...
... callback function(err) { console.log('the following gum error occured: ' + err); } ); } else { console.log('getusermedia not supported on your browser!'); } source.connect(gainnode); gainnode.connect(audioctx.destination); ... mute.onclick = voicemute; function voicemute() { if(mute.id == "") { // 0 means mute. if you still hear something, make sure you haven't // connected your source into the output in addition to using the gainnode. gainnode.gain.setvalueattime(0, audioctx.currenttime); mute.id = "activated"; mute.innerhtml = "unmute"; } else { gainnode.gain.setvalueattime(1, audioctx.currenttime); mute.id = ""; mute.innerhtml = "mute"; } } specifications specification status comment web audio apithe definit...

Gamepad - Web APIs
the gamepad interface of the gamepad api defines an individual gamepad or other controller, allowing access to information such as button presses, axis positions, and id. a gamepad object can be returned in one of two ways: via the gamepad property of the gamepadconnected and gamepaddisconnected events, or by grabbing any position in the array returned by the navigator.getgamepads() method. properties gamepad.axes read only an array representing the controls with axes present on the device (e.g. analog thumb sticks). gamepad.buttons read only an array of gamepadbutton objects representing the buttons present on the device. gamepad.connected read only a boolean indicating whether the gamepad is still connected to the system. gamepad.id read only a domstring containing identifying ...
... gamepad.mapping read only a string indicating whether the browser has remapped the controls on the device to a known layout. gamepad.timestamp read only a domhighrestimestamp representing the last time the data for this gamepad was updated. ...
...features like haptic feedback and webvr controller pose information. gamepad.hand read only an enum defining what hand the controller is being held in, or is most likely to be held in. gamepad.hapticactuators read only an array containing gamepadhapticactuator objects, each of which represents haptic feedback hardware available on the controller. example window.addeventlistener("gamepadconnected", function(e) { console.log("gamepad connected at index %d: %s. %d buttons, %d axes.", e.gamepad.index, e.gamepad.id, e.gamepad.buttons.length, e.gamepad.axes.length); }); specifications specification status comment gamepadthe definition of 'gamepad' in that specification. working draft initial definition gamepad extensionsthe definition of 'gamepa...

IDBDatabase: close event - Web APIs
the close event is fired on idbdatabase when the database connection is unexpectedly closed. this could happen, for example, if the underlying storage is removed or if the user clears the database in the browser's history preferences. note that it is not fired if the database connection is closed normally using idbdatabase.close(). bubbles no cancelable no interface event event handler property onerror examples this example opens a database and listens for the close event: // open the database const dbopenrequest = window.indexeddb.open('todolist', 4); dbopenrequest.onupgradeneeded = (event) => { const db = event.target.result; // create an objectstore for this database const objectstore = db.createobjectstore('todolist', { keypa...
...; objectstore.createindex('minutes', 'minutes', { unique: false }); objectstore.createindex('day', 'day', { unique: false }); objectstore.createindex('month', 'month', { unique: false }); objectstore.createindex('year', 'year', { unique: false }); }; dbopenrequest.onsuccess = (event) => { const db = dbopenrequest.result; db.addeventlistener('close', () => { console.log('database connection closed'); }); }; the same example, using the onclose property instead of addeventlistener(): // open the database const dbopenrequest = window.indexeddb.open('todolist', 4); dbopenrequest.onupgradeneeded = (event) => { const db = event.target.result; // create an objectstore for this database const objectstore = db.createobjectstore('todolist', { keypath: 'tasktitle' }); // de...
...unique: false }); objectstore.createindex('minutes', 'minutes', { unique: false }); objectstore.createindex('day', 'day', { unique: false }); objectstore.createindex('month', 'month', { unique: false }); objectstore.createindex('year', 'year', { unique: false }); }; dbopenrequest.onsuccess = (event) => { const db = dbopenrequest.result; db.onclose = () => { console.log('database connection closed'); }; }; ...

IDBDatabase.name - Web APIs
for a full example, see our to-do notifications app (view example live). ...
...for a full example, see our to-do notifications app (view example live). ...
...for a full example, see our to-do notifications app (view example live). ...

IDBObjectStoreSync - Web APIs
-populated, or if no record exists with a key corresponding to the value parameter in the index's referenced object store. data_err if this object store uses out-of-line keys, and the key parameter was not passed. serial_err if the data being stored could not be serialized by the internal structured cloning algorithm. createindex() creates and returns a new index with the given name in the connected database. idbindexsync createindex ( in domstring name, in domstring keypath, in optional boolean unique ); parameters name the name of a new index. keypath the key path used by the new index. unique if true, keys in the index must be unique; if false, duplicate keys are allowed. returns idbindexsync an object to access the newly created index. get() retrieves ...
...ame, using the mode of the current transaction. idbindexsync openindex ( in domstring name ) raises (idbdatabaseexception); parameters name the name of the index to open. returns idbindexsync an object to access the index. exceptions this method can raise an idbdatabaseexception with the following code: not_found_err if the index with the given name does not exist in the connected database. put() stores the given value in this object store and returns the key for the stored record. if a record already exists with the given key, it is overwritten. any put ( in any value, in optional any key ) raises (idbdatabaseexception); parameters value the value to be stored in the record. key the key to be used to identify the record. returns any the key for the...
...in this index with the given key. removeindex() destroys an index with the given name. void removeindex ( in domstring indexname ) raises (idbdatabaseexception); parameters indexname the name of the existing index to remove. exceptions this method can raise an idbdatabaseexception with the following code: not_found_err if an index with the given name does not exist in the connected database. ...

IndexedDB API - Web APIs
and usage indexeddb is a transactional database system, like an sql-based rdbms. however, unlike sql-based rdbmses, which use fixed-column tables, indexeddb is a javascript-based object-oriented database. indexeddb lets you store and retrieve objects that are indexed with a key; any objects supported by the structured clone algorithm can be stored. you need to specify the database schema, open a connection to your database, and then retrieve and update data within a series of transactions. read more about the concepts behind indexeddb. learn to use indexeddb asynchronously from first principles with our using indexeddb guide. combine indexeddb for storing data offline with service workers for storing assets offline, as outlined in making pwas work offline with service workers. note: like...
... simple, and differs between browsers. browser storage limits and eviction criteria attempts to explain how this works, at least in the case of firefox. interfaces to get access to a database, call open() on the indexeddb attribute of a window object. this method returns an idbrequest object; asynchronous operations communicate to the calling application by firing events on idbrequest objects. connecting to a database idbenvironment provides access to indexeddb functionality. it is implemented by the window and worker objects. this interface isn't part of the 2.0 specification. idbfactory provides access to a database. this is the interface implemented by the global object indexeddb and is therefore the entry point for the api. idbopendbrequest represents a request to open a database. ...
...ironment provides access to indexeddb functionality. it is implemented by the window and worker objects. this interface isn't part of the 2.0 specification. idbfactory provides access to a database. this is the interface implemented by the global object indexeddb and is therefore the entry point for the api. idbopendbrequest represents a request to open a database. idbdatabase represents a connection to a database. it's the only way to get a transaction on the database. retrieving and modifying data idbtransaction represents a transaction. you create a transaction on a database, specify the scope (such as which object stores you want to access), and determine the kind of access (read only or readwrite) that you want. idbrequest generic interface that handles database requests and p...

MediaElementAudioSourceNode - Web APIs
so playi...
...so playing/pausing the media can still be done through the media element api and the player controls. specification specification status comment web au...
... cury = (window.event) ? e.pagey : event.clienty + (document.documentelement.scrolltop ? document.documentelement.scrolltop : document.body.scrolltop); gainnode.gain.value = cury/height; } // connect the audiobuffersourcenode to the gainnode // and the gainnode to the destination, so we can play the // music and adjust the volume using the mouse cursor source.connect(gainnode); gainnode.connect(audioctx.destination); note: as a consequence of calling createmediaelementsource(), audio playback from the htmlmediaelement will be re-routed into the processing graph of the audiocontext. so playing/pausing the media can still be done through the media element api and the player controls. specification specification status comment web audio apithe definition of 'me...

MediaStreamTrack - Web APIs
d by the web application to provide a hint as to what type of content the track contains to guide how it should be treated by api consumers. mediastreamtrack.enabled a boolean whose value of true if the track is enabled, that is allowed to render the media source stream; or false if it is disabled, that is not rendering the media source stream but silence and blackness. if the track has been disconnected, this value can be changed but has no more effect. note: you can implement standard "mute" functionality by setting enabled to false. the muted property refers to a condition in which there's no media because of a technical issue. mediastreamtrack.id read only returns a domstring containing a unique identifier (guid) for the track; it is generated by the browser. mediastreamtrack.isolate...
...returns a domstring set to "audio" if the track is an audio track and to "video", if it is a video track. it doesn't change if the track is deassociated from its source. mediastreamtrack.label read only returns a domstring containing a user agent-assigned label that identifies the track source, as in "internal microphone". the string may be left empty and is empty as long as no source has been connected. when the track is deassociated from its source, the label is not changed. mediastreamtrack.muted read only returns a boolean value indicating whether the track is unable to provide media data due to a technical issue. note: you can implement standard "mute" functionality by setting enabled to false, and unmute the media by setting it back to true again. mediastreamtrack.readonly read on...
... true again. mediastreamtrack.readonly read only returns a boolean value with a value of true if the track is readonly (such a video file source or a camera that settings can't be modified), false otherwise. mediastreamtrack.readystate read only returns an enumerated value giving the status of the track. this will be one of the following values: "live" which indicates that an input is connected and does its best-effort in providing real-time data. in that case, the output of data can be switched on or off using the enabled attribute. "ended" which indicates that the input is not giving any more data and will never provide new data. mediastreamtrack.remote read only returns a boolean with a value of true if the track is sourced by a rtcpeerconnection, false otherwise. meth...

MutationObserver.observe() - Web APIs
method observe() configures the mutationobserver callback to begin receiving notifications of changes to the dom that match the given options. depending on the configuration, the observer may watch a single node in the dom tree, or that node and some or all of its descendant nodes. to stop the mutationobserver (so that none of its callbacks will be triggered any longer), call mutationobserver.disconnect(). syntax mutationobserver.observe(target, options) parameters target a dom node (which may be an element) within the dom tree to watch for changes, or to be the root of a subtree of nodes to be watched. options a mutationobserverinit object providing options that describe which dom mutations should be reported to mutationobserver’s callback. return value undefined. exceptions ...
...eats to note: if you call observe() on a node that's already being observed by the same mutationobserver, all existing observers are automatically removed from all targets being observed before the new observer is activated. if the same mutationobserver is not already in use on the target, then the existing observers are left alone and the new one is added. observation follows nodes when disconnected mutation observers are intended to let you be able to watch the desired set of nodes over time, even if the direct connections between those nodes are severed. if you begin watching a subtree of nodes, and a portion of that subtree is detached and moved elsewhere in the dom, you continue to watch the detached segment of nodes, receiving the same callbacks as before the nodes were detached from...
...ere in the dom, you continue to watch the detached segment of nodes, receiving the same callbacks as before the nodes were detached from the original subtree. in other words, until you've been notified that nodes are being split off from your monitored subtree, you'll get notifications of changes to that split-off subtree and its nodes. this prevents you from missing changes that occur after the connection is severed and before you have a chance to specifically begin monitoring the moved node or subtree for changes. theoretically, this means that if you keep track of the mutationrecord objects describing the changes that occur, you should be able to "undo" the changes, rewinding the dom back to its initial state. example in this example, we demonstrate how to call the method observe() on an i...

MutationObserver.takeRecords() - Web APIs
the mutationobserver method takerecords() returns a list of all matching dom changes that have been detected but not yet processed by the observer's callback function, leaving the mutation queue empty. the most common use case for this is to immediately fetch all pending mutation records immediately prior to disconnecting the observer, so that any pending mutations can be processed when stopping down the observer. syntax const mutationrecords = mutationobserver.takerecords() parameters none. return value an array mutationrecord objects, each describing one change applied to the observed portion of the document's dom tree. note: the queue of mutations which have occurred, but not been delivered to the observer's callback is left empty after calling takerecords(). example in this examp...
...alue an array mutationrecord objects, each describing one change applied to the observed portion of the document's dom tree. note: the queue of mutations which have occurred, but not been delivered to the observer's callback is left empty after calling takerecords(). ...
...disconnecting the observer. const targetnode = document.queryselector("#someelement"); const observeroptions = { childlist: true, attributes: true } const observer = new mutationobserver(callback); observer.observe(targetnode, observeroptions); /* ...later, when it's time to stop observing... */ /* handle any still-pending mutations */ let mutations = observer.takerecords(); observer.disconnect(); if (mutations) { callback(mutations); } the code in lines 12–17 fetches any unprocessed mutation records, then invokes the callback with the records so that they can be processed. this is done immediately prior to calling disconnect() to stop observing the dom. specifications specification status comment domthe definition of 'mutationobserver.takerecords()'...

Online and offline events - Web APIs
nline/offline events help to simplify. api navigator.online navigator.online is a property that maintains a true/false value (true for online, false for offline). this property is updated whenever the user switches into "offline mode" by selecting the corresponding menu item (file -> work offline in firefox). additionally, this property should update whenever a browser is no longer capable of connecting to the network. according to the specification: the navigator.online attribute must return false if the user agent will not contact the network when the user follows links or when a script requests a remote page (or knows that such an attempt would fail)... firefox 2 updates this property when switching to/from the browser's offline mode. firefox 41 updates this property when the os reports ...
...according to the specification: the navigator.online attribute must return false if the user agent will not contact the network when the user follows links or when a script requests a remote page (or knows that such an attempt would fail)... firefox 2 updates this property when switching to/from the browser's offline mode. firefox 41 updates this property when the os reports a change in network connectivity on windows, linux, and os x. this property existed in older versions of firefox and internet explorer (the specification based itself off of these prior implementations), so you can begin using it immediately. network status autodetection was implemented in firefox 2. "online" and "offline" events firefox 3 introduces two new events: "online" and "offline". these two events are fired on t...
...vents: "online" and "offline". these two events are fired on the <body> of each page when the browser switches between online and offline mode. additionally, the events bubble up from document.body, to document, ending at window. both events are non-cancellable (you can't prevent the user from coming online, or going offline). firefox 41 fires these events when the os reports a change in network connectivity on windows, linux, and os x. you can register listeners for these events in a few familiar ways: using addeventlistener on the window, document, or document.body by setting the .ononline or .onoffline properties on document or document.body to a javascript function object. (note: using window.ononline or window.onoffline will not work for compatibility reasons.) by specifying ononline=...

Navigator.onLine - Web APIs
returns the online status of the browser. the property returns a boolean value, with true meaning online and false meaning offline. the property sends updates whenever the browser's ability to connect to the network changes. the update occurs when the user follows links or when a script requests a remote page. for example, the property should return false when users click links soon after they lose internet connection. browsers implement this property differently. in chrome and safari, if the browser is not able to connect to a local area network (lan) or a router, it is offline; all other conditions return true. so while you can assume that the browser is offline when it returns a false value, you cannot assume that a true value necessarily means that the browser can access the internet. you ...
... router, it is offline; all other conditions return true. so while you can assume that the browser is offline when it returns a false value, you cannot assume that a true value necessarily means that the browser can access the internet. you could be getting false positives, such as in cases where the computer is running a virtualization software that has virtual ethernet adapters that are always "connected." therefore, if you really want to determine the online status of the browser, you should develop additional means for checking. to learn more, see the html5 rocks article, working off the grid. in firefox and internet explorer, switching the browser to offline mode sends a false value. until firefox 41, all other conditions return a true value; testing actual behavior on nightly 68 on window...
...to determine the online status of the browser, you should develop additional means for checking. to learn more, see the html5 rocks article, working off the grid. in firefox and internet explorer, switching the browser to offline mode sends a false value. until firefox 41, all other conditions return a true value; testing actual behavior on nightly 68 on windows shows that it only looks for lan connection like chrome and safari giving false positives. you can see changes in the network state by listening for the events on window.ononline and window.onoffline. syntax online = window.navigator.online; value online is a boolean true or false. example view a live example. to check if you are online, query window.navigator.online, as in the following example: if (navigator.online) { con...

PannerNode.coneInnerAngle - Web APIs
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PannerNode.coneOuterAngle - Web APIs
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PannerNode.coneOuterGain - Web APIs
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PannerNode.orientationX - Web APIs
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PannerNode.orientationY - Web APIs
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PannerNode.orientationZ - Web APIs
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PerformanceResourceTiming.domainLookupEnd - Web APIs
"resource" type events are logged. ...
... events are logged. ...
...; } } function print_start_and_end_properties(perfentry) { // print timestamps of the *start and *end properties properties = ["connectstart", "connectend", "domainlookupstart", "domainlookupend", "fetchstart", "redirectstart", "redirectend", "requeststart", "responsestart", "responseend", "secureconnectionstart"]; for (var i=0; i < properties.length; i++) { // check each property var supported = properties[i] in perfentry; if (supported) { var value = perfentry[properties[i]]; console.log("... " + properties[i] + " = " + value); } else { console.log("... " + properties[i] + " = not supported"); } } } specifications specification status ...

PerformanceResourceTiming.domainLookupStart - Web APIs
events are logged. ...
...d. ...
...print_start_and_end_properties(perfentry) { // print timestamps of the performanceentry *start and *end properties properties = ["connectstart", "connectend", "domainlookupstart", "domainlookupend", "fetchstart", "redirectstart", "redirectend", "requeststart", "responsestart", "responseend", "secureconnectionstart"]; for (var i=0; i < properties.length; i++) { // check each property var supported = properties[i] in perfentry; if (supported) { var value = perfentry[properties[i]]; console.log("... " + properties[i] + " = " + value); } else { console.log("... " + properties[i] + " = not supported"); } } } specifications specification status ...

PerformanceResourceTiming.fetchStart - Web APIs
events are logged. ...
...d. ...
...print_start_and_end_properties(perfentry) { // print timestamps of the performanceentry *start and *end properties properties = ["connectstart", "connectend", "domainlookupstart", "domainlookupend", "fetchstart", "redirectstart", "redirectend", "requeststart", "responsestart", "responseend", "secureconnectionstart"]; for (var i=0; i < properties.length; i++) { // check each property var supported = properties[i] in perfentry; if (supported) { var value = perfentry[properties[i]]; console.log("... " + properties[i] + " = " + value); } else { console.log("... " + properties[i] + " = not supported"); } } } specifications specification status ...

PerformanceResourceTiming.redirectEnd - Web APIs
events are logged. ...
...d. ...
...print_start_and_end_properties(perfentry) { // print timestamps of the performanceentry *start and *end properties properties = ["connectstart", "connectend", "domainlookupstart", "domainlookupend", "fetchstart", "redirectstart", "redirectend", "requeststart", "responsestart", "responseend", "secureconnectionstart"]; for (var i=0; i < properties.length; i++) { // check each property var supported = properties[i] in perfentry; if (supported) { var value = perfentry[properties[i]]; console.log("... " + properties[i] + " = " + value); } else { console.log("... " + properties[i] + " = not supported"); } } } specifications specification status ...

PerformanceResourceTiming.redirectStart - Web APIs
events are logged. ...
...d. ...
...print_start_and_end_properties(perfentry) { // print timestamps of the performanceentry *start and *end properties properties = ["connectstart", "connectend", "domainlookupstart", "domainlookupend", "fetchstart", "redirectstart", "redirectend", "requeststart", "responsestart", "responseend", "secureconnectionstart"]; for (var i=0; i < properties.length; i++) { // check each property var supported = properties[i] in perfentry; if (supported) { var value = perfentry[properties[i]]; console.log("... " + properties[i] + " = " + value); } else { console.log("... " + properties[i] + " = not supported"); } } } specifications specification status ...

PerformanceResourceTiming.responseStart - Web APIs
events are logged. ...
...d. ...
...print_start_and_end_properties(perfentry) { // print timestamps of the performanceentry *start and *end properties properties = ["connectstart", "connectend", "domainlookupstart", "domainlookupend", "fetchstart", "redirectstart", "redirectend", "requeststart", "responsestart", "responseend", "secureconnectionstart"]; for (var i=0; i < properties.length; i++) { // check each property var supported = properties[i] in perfentry; if (supported) { var value = perfentry[properties[i]]; console.log("... " + properties[i] + " = " + value); } else { console.log("... " + properties[i] + " = not supported"); } } } specifications specification status ...

PerformanceResourceTiming.workerStart - Web APIs
events are logged. ...
...d. ...
...print_start_and_end_properties(perfentry) { // print timestamps of the performanceentry *start and *end properties properties = ["connectstart", "connectend", "domainlookupstart", "domainlookupend", "fetchstart", "redirectstart", "redirectend", "requeststart", "responsestart", "responseend", "secureconnectionstart", "workerstart"]; for (var i=0; i < properties.length; i++) { // check each property var supported = properties[i] in perfentry; if (supported) { var value = perfentry[properties[i]]; console.log("... " + properties[i] + " = " + value); } else { console.log("... " + properties[i] + " = not supported"); } } } specifications specifica...

PerformanceResourceTiming - Web APIs
browser starts to fetch the resource. performanceresourcetiming.domainlookupstartread only a domhighrestimestamp immediately before the browser starts the domain name lookup for the resource. performanceresourcetiming.domainlookupendread only a domhighrestimestamp representing the time immediately after the browser finishes the domain name lookup for the resource. ...
...ghrestimestamp immediately before the browser starts the domain name lookup for the resource. performanceresourcetiming.domainlookupendread only a domhighrestimestamp representing the time immediately after the browser finishes the domain name lookup for the resource. performanceresourcetiming.connectstartread only a domhighrestimestamp immediately before the browser starts to establish the connection to the server to retrieve the resource. performanceresourcetiming.connectendread only a domhighrestimestamp immediately after the browser finishes establishing the connection to the server to retrieve the resource. performanceresourcetiming.secureconnectionstartread only a domhighrestimestamp immediately before the browser starts the handshake process to secure the current connection. p...
...e the browser starts requesting the resource from the server. performanceresourcetiming.responsestartread only a domhighrestimestamp immediately after the browser receives the first byte of the response from the server. performanceresourcetiming.responseendread only a domhighrestimestamp immediately after the browser receives the last byte of the resource or immediately before the transport connection is closed, whichever comes first. performanceresourcetiming.transfersizeread only a number representing the size (in octets) of the fetched resource. the size includes the response header fields plus the response payload body. performanceresourcetiming.encodedbodysizeread only a number representing the size (in octets) received from the fetch (http or cache), of the payload body, before ...

RTCConfiguration.iceTransportPolicy - Web APIs
its value must come from the rtcicetransportpolicy enumerated type. if this property isn't included in the rtcconfiguration, the default value, all, is used. ...
...ndidates relayed by a stun or turn server. this can be used to prevent the remote endpoint from receiving the user's ip addresses, which may be important in some security situations. for example, in a video calling application, the app may want to prevent unknown callers from learning the callee's ip addresses until the callee has agreed to receive the call. ...
... video calling application, the app may want to prevent unknown callers from learning the callee's ip addresses until the callee has agreed to receive the call. examples in this example, a new connection is configured to only accept relay candidates. let config = { iceservers: [ { urls: [ "stun:stun.example.com" ] }, ], icetransportpolicy: "relay" }; let pc = new rtcpeerconnection(config); specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtccandidate.icetransportpolicy' in that specification. candidate recommendation initial definition. ...

RTCDataChannel.onopen - Web APIs
ta channel's underlying data transport—the link over which the rtcdatachannel's messages flow—is established or re-established. syntax rtcdatachannel.onopen = function; value a function which the browser will call to handle the open event. the function receives as its only input parameter the event itself, of type event. ...
...lying data transport—the link over which the rtcdatachannel's messages flow—is established or re-established. syntax rtcdatachannel.onopen = function; value a function which the browser will call to handle the open event. the function receives as its only input parameter the event itself, of type event. example this example adds a new data channel to an existing rtcpeerconnection, mypeerconnection. ...
...e browser will call to handle the open event. the function receives as its only input parameter the event itself, of type event. example this example adds a new data channel to an existing rtcpeerconnection, mypeerconnection. it then establishes an open event handler which updates some user interface elements to prepare them for being used to send messages over the data channel. ...

RTCIceCandidate.usernameFragment - Web APIs
rnamefragment and password both change every time an ice restart occurs. example although the webrtc infrastructure will filter out obsolete candidates for you after an ice restart, you can do it yourself if you're trying to absolutely minimize the number of messages going back and forth. to do so, you can compare the value of usernamefragment to the current usernamefragment being used for the connection after receiving the candidate from the signaling server and before caling addicecandidate() to add it to the set of possible candidates. when the web app receives a message from the signaling server that includes a candidate to be added to the rtcpeerconnection, you can (and generally should) simply call addicecandidate(). there's not typically a need to manually worry about filtering the can...
...added to the rtcpeerconnection, you can (and generally should) simply call addicecandidate(). there's not typically a need to manually worry about filtering the candidates. however, let's imagine that we do need to minimize traffic. the function below, ssnewcandidate(), is called when a message, signalmsg, arrives from the signaling server that contains an ice candidate to be added to the rtcpeerconnection. to avoid including candidates obsoleted by an ice restart, we can use code like this: const ssnewcandidate = signalmsg => { let candidate = new rtcicecandidate(signalmsg.candidate); let receivers = pc.getreceivers(); receivers.foreach(receiver => { let parameters = receiver.transport.getparameters(); if (parameters.usernamefragment === candidate.usernamefragment) { retu...
... specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcicecandidate.usernamefragment' in that specification. candidate recommendation initial definition. ...

RTCIceCandidatePairStats.requestsSent - Web APIs
note: the reported number of requests does not include retransmissions. if a request had to be repeated due to network issues, it will be counted multiple times here. this differs from requestsreceived, which does include retransmisions. ...
... note: the reported number of requests does not include retransmissions. if a request had to be repeated due to network issues, it will be counted multiple times here. this differs from requestsreceived, which does include retransmisions. ...
... note: the reported number of requests does not include retransmissions. if a request had to be repeated due to network issues, it will be counted multiple times here. this differs from requestsreceived, which does include retransmisions. ...

RTCIceServer.username - Web APIs
specifies the username to use when authenticating with the ice server being described. this value is used when the rtciceserver describes a turn server. syntax var iceserver = { ... username = username, ... ...
...cribed. this value is used when the rtciceserver describes a turn server. syntax var iceserver = { ... username = username, ... }; var username = iceserver.username; iceserver.username = newusername; example this example creates a new rtcpeerconnection which will use a turn server at turnserver.example.org to negotiate connections. ...
...... username = username, ... }; var username = iceserver.username; iceserver.username = newusername; example this example creates a new rtcpeerconnection which will use a turn server at turnserver.example.org to negotiate connections. logging into the turn server will use the username "webrtc" and the creative password "turnpassword". mypeerconnection = new rtcpeerconnection({ iceservers: [ { urls: "turn:turnserver.example.org", // a turn server username: "webrtc", credential: "turnpassword" } ] }); specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtciceserver.username' in that specification. candidate recommenda...

RTCIdentityErrorEvent - Web APIs
properties a rtcidentityerrorevent being an event, this event also implements these properties. ...
... properties a rtcidentityerrorevent being an event, this event also implements these properties. ...
... properties a rtcidentityerrorevent being an event, this event also implements these properties. ...

RTCIdentityEvent - Web APIs
properties a rtcidentityevent being an event, this event also implements these properties. rtcidentityevent.assertion read only returns the domstring containing a blob being the assertion generated. ...
... properties a rtcidentityevent being an event, this event also implements these properties. rtcidentityevent.assertion read only returns the domstring containing a blob being the assertion generated. ...
... properties a rtcidentityevent being an event, this event also implements these properties. rtcidentityevent.assertion read only returns the domstring containing a blob being the assertion generated. ...

RTCNetworkType - Web APIs
the webrtc rtcnetworktype enumerated type defines a set of strings used to identify the type of network used by a connection between two peers. this type is used as the value or the following properties: rtcicecandidate's networktype rtcstunserverconnectionstats's networktype values bluetooth a bluetooth connection is used by the described connection. cellular the connection uses a cellular data service to connect. this includes all cellular data services including edge (2g), hspa (3g), lte (4g), and nr (5g). ethernet the described connection uses an ethernet network. wifi the described connection uses wifi. wimax the described connection uses a wimax network. vpn the connection uses a virtual private network (vpn). the vpn obscures the underlying network type, which is not d...
... (3g), lte (4g), and nr (5g). ethernet the described connection uses an ethernet network. wifi the described connection uses wifi. wimax the described connection uses a wimax network. vpn the connection uses a virtual private network (vpn). the vpn obscures the underlying network type, which is not discernible. unknown the user's browser is unable or unwilling to identify the underlying connection technology used by the described connection. this may be because the browser isn't able to determine the network type for some reason or it may be intentionally getting obscured for security reasons, such as to avoid device fingerprinting. ...
...known the user's browser is unable or unwilling to identify the underlying connection technology used by the described connection. this may be because the browser isn't able to determine the network type for some reason or it may be intentionally getting obscured for security reasons, such as to avoid device fingerprinting. note: keep in mind that the specified value only reflects the initial connection between the local peer and the next hop along the network toward reaching the remote peer. for example, if the networktype is wifi but the user is connected using a cellular hotspot, the connection will be bottlenecked by the underlying cellular network (and any other networks between the two peers). specifications specification status comment webrtc 1.0: real-time c...

RTCRtpSender.setStreams() - Web APIs
tream); rtcrtpsender.setstreams([mediastream...]); parameters mediastream or [mediastream...] optional an mediastream object—or an array of multiple mediastream objects—identifying the streams to which the rtcrtpsender's track belongs. if this parameter isn't specified, no new streams will be associated with the track. return value none. ...
...ciated with the track. return value none. exceptions invalidstateerror the sender's connection is closed. description setstreams() is purely additive. it doesn't remove the track from any streams; it simply adds it to new ones. if you specify streams to which the track already belongs, that stream is unaffected. once the track has been added to all of the streams, renegotiation of the connection will be triggered by the negotiationneeded event being dispatched to the rtcpeerconnection to which the sender belongs. example this example adds all of an rtcpeerconnection's tracks to the specified stream. ...
..., renegotiation of the connection will be triggered by the negotiationneeded event being dispatched to the rtcpeerconnection to which the sender belongs. example this example adds all of an rtcpeerconnection's tracks to the specified stream. function addtrackstostream(stream) { let senders = pc.getsenders(); senders.foreach((sender) => { if (sender.track && (sender.transport.state === connected)) { sender.setstreams(stream); } }); } after calling the rtcpeerconnection method getsenders() to get the list of the connection's senders, the addtrackstostream() function iterates over the list. for each sender, if the sender's track is non-null and its transport's state is connected, we call setstreams() to add the track to the stream specified. specifications specif...

Resource Timing API - Web APIs
s accurate to a millisecond. resource loading timestamps an application can get timestamps for the various stages used to load a resource. the first property in the processing model is starttime which returns the timestamp immediately before the resource loading process begins. the fetchstart timestamps follows and redirect processing (if applicable) and preceeds dns lookup. the next stages are connectstart and connectend which are the timestamps immediately before and after connecting to the server, respectively. the last three timestamps are, in order: requeststart - the timestamp before the browser starts requesting the resource from the server; responsestart - the timestamp after the browser receives the first byte of the response from the server; and responseend - the timestamp after the b...
...to the server, respectively. the last three timestamps are, in order: requeststart - the timestamp before the browser starts requesting the resource from the server; responsestart - the timestamp after the browser receives the first byte of the response from the server; and responseend - the timestamp after the browser receives the last byte of the resource. if the resource is loaded via a secure connection a secureconnectionstart timestamp will be available between the connection start and end events. when cors is in effect, many of these values are returned as zero unless the server's access policy permits these values to be shared. this requires the server providing the resource to send the timing-allow-origin http response header with a value specifying the origin or origins which are allow...
...his requires the server providing the resource to send the timing-allow-origin http response header with a value specifying the origin or origins which are allowed to get the restricted timestamp values. the properties which are returned as 0 by default when loading a resource from a domain other than the one of the web page itself: redirectstart, redirectend, domainlookupstart, domainlookupend, connectstart, connectend, secureconnectionstart, requeststart, and responsestart. the performanceresourcetiming interface also includes several network timing properties. the redirectstart and redirectend properties return timestamps for redirect start and end times, respectively. likewise, the the domainlookupstart and domainlookupend properties return timestamps for dns lookup start and end times, re...

WebSocket.close() - Web APIs
this string must be no longer than 123 bytes of utf-8 text (not characters). exceptions thrown invalid_access_err an invalid code was specified. syntax_err the reason string is too long or contains unpaired surrogates. ...
...this string must be no longer than 123 bytes of utf-8 text (not characters). exceptions thrown invalid_access_err an invalid code was specified. syntax_err the reason string is too long or contains unpaired surrogates. ...
...this string must be no longer than 123 bytes of utf-8 text (not characters). exceptions thrown invalid_access_err an invalid code was specified. ...

The WebSocket API (WebSockets) - Web APIs
the websocket api is an advanced technology that makes it possible to open a two-way interactive communication session between the user's browser and a server. with this api, you can send messages to a server and receive event-driven responses without having to poll the server for a reply. note: while a websocket connection is functionally somewhat similar to standard unix-style sockets, they are not related. interfaces websocket the primary interface for connecting to a websocket server and then sending and receiving data on the connection. closeevent the event sent by the websocket object when the connection closes. messageevent the event sent by the websocket object when a message is received from the server. guides writing websocket client applications writing websocket ser...
...et implementation for node.js (uwebsockets v0.14 fork) socket.io: a long polling/websocket based third party transfer protocol for node.js. socketcluster: a pub/sub websocket framework for node.js with a focus on scalability. websocket-node: a websocket server api implementation for node.js. total.js: web application framework for node.js (example: websocket chat) faye: a websocket (two-ways connections) and eventsource (one-way connections) for node.js server and client. signalr: signalr will use websockets under the covers when it's available, and gracefully fallback to other techniques and technologies when it isn't, while your application code stays the same. caddy: a web server capable of proxying arbitrary commands (stdin/stdout) as a websocket. ws: a popular websocket client & serv...
... signalr will use websockets under the covers when it's available, and gracefully fallback to other techniques and technologies when it isn't, while your application code stays the same. caddy: a web server capable of proxying arbitrary commands (stdin/stdout) as a websocket. ws: a popular websocket client & server library for node.js. jsonrpc-bidirectional: asynchronous rpc which, on a single connection, may have functions exported on the server and, and the same time, on the client (client may call server, server may also call client). cowboy: cowboy is a small, fast and modern http server for erlang/otp with websocket support. related topics ajax javascript specifications specification status comments html living standardthe definition of 'websocket api...

Background audio processing using AudioWorklet - Web APIs
rklet's domxref("worklet.addmodule", "addmodule()")}} method to install the audio worklet processor module. as needed, create audio processing nodes by passing the processor's name (which is defined by the module) to the audioworkletnode() constructor. set up any audio parameters the audioworkletnode needs, or that you wish to configure. these are defined in the audio worklet processor module. connect the created audioworkletnodes into your audio processing pipeline as you would any other node, then use your audio pipeline as usual. throughout the remainder of this article, we'll look at these steps in more detail, with examples (including working examples you can try out on your own). the example code found on this page is derived from this working example which is available on glitch. the...
... to change this behavior if possible as it may have a slight negative impact on performance. creating an audio processor worklet node to create an audio node that pumps blocks of audio data through an audioworkletprocessor, you need to follow these simple steps: load and install the audio processor module create an audioworkletnode, specifying the audio processor module to use by its name connect inputs to the audioworkletnode and its outputs to appropriate destinations (either other nodes or to the audiocontext object's destination property. to use an audio worklet processor, you can use code similar to the following: let audiocontext = null; async function createmyaudioprocessor() { if (!audiocontext) { try { audiocontext = new audiocontext(); await audiocontext.re...
...orkletnode configured to use your audio processor. it also handles creating the audio context if it hasn't already been done. in order to ensure the context is usable, this starts by creating the context if it's not already available, then adds the module containing the processor to the worklet. once that's done, it instantiates and returns a new audioworkletnode. once you have that in hand, you connect it to other nodes and otherwise use it just like any other node. you can then create a new audio processor node by simply doing this: let newprocessornode = createmyaudioprocessor(); if the returned value, newprocessornode, is non-null, we have a valid audio context with its hiss processor node in place and ready to use. supporting audio parameters just like any other web audio node, audiowo...

Using the application cache - HTML: Hypertext Markup Language
tions: cache, network, and fallback. cache: this is the default section for entries in a cache manifest file. files listed under the cache: section header (or immediately after the cache manifest line) are explicitly cached after they're downloaded for the first time. network: files listed under the network: section header in the cache manifest file are white-listed resources that require a connection to the server. all requests to such resources bypass the cache, even if the user is offline. the wildcard character * can be used once. most sites need *. fallback: the fallback: section specifies fallback pages the browser should use if a resource is inaccessible. each entry in this section lists two uris—the first is the resource, the second is the fallback. both uris must be relative an...
...011-08-14 # this is another comment index.html cache.html style.css image1.png # use from network if available network: network.html # fallback content fallback: . fallback.html this example uses network and fallback sections to specify that the network.html page must always be retrieved from the network, and that the fallback.html page should be served as a fallback resource (e.g., in case a connection to the server cannot be established). structure of a cache manifest file cache manifest files must be served with the text/cache-manifest mime type. all resources served using this mime type must follow the syntax for an application cache manifest, as defined in this section. cache manifests are utf-8 format text files, and may optionally include a bom character. newlines may be represented...
...a varies from section to section. in the explicit (cache:) section, each line is a valid uri or iri reference to a resource to cache (no wildcard characters are allowed in this sections). whitespace is allowed before and after the uri or iri on each line. in the fallback section each line is a valid uri or iri reference to a resource, followed by a fallback resource that is to be served up when a connection with the server cannot be made. in the network section, each line is a valid uri or iri reference to a resource to fetch from the network (or the wildcard character * can be used in this section). note: relative uris are relative to the cache manifest's uri, not to the uri of the document referencing the manifest. cache manifest files can switch from section to section at will (each secti...

Strict-Transport-Security - HTTP
max-age=<expire-time> the time, in seconds, that the browser should remember that a site is only to be accessed using https. includesubdomains optional if this optional parameter is specified, this rule applies to all of the site's subdomains as well. preload optional see preloading strict transport security for details. not part of the specification. description if a website accepts a connection through http and redirects to https, visitors may initially communicate with the non-encrypted version of the site before being redirected, if, for example, the visitor types http://www.foo.com/ or even just foo.com. this creates an opportunity for a man-in-the-middle attack. the redirect could be exploited to direct visitors to a malicious site instead of the secure version of the original si...
...ure version of the original site. the http strict transport security header informs the browser that it should never load a site using http and should automatically convert all attempts to access the site using http to https requests instead. note: the strict-transport-security header is ignored by the browser when your site is accessed using http; this is because an attacker may intercept http connections and inject the header or remove it. when your site is accessed over https with no certificate errors, the browser knows your site is https capable and will honor the strict-transport-security header. an example scenario you log into a free wifi access point at an airport and start surfing the web, visiting your online banking service to check your balance and pay a couple of bills. unfortun...
...t attempt to load the site via http will proceed as normal instead of automatically using https. whenever the strict-transport-security header is delivered to the browser, it will update the expiration time for that site, so sites can refresh this information and prevent the timeout from expiring. should it be necessary to disable strict transport security, setting the max-age to 0 (over a https connection) will immediately expire the strict-transport-security header, allowing access via http. preloading strict transport security google maintains an hsts preload service. by following the guidelines and successfully submitting your domain, browsers will never connect to your domain using an insecure connection. while the service is hosted by google, all browsers have stated an intent to use (or...

Proxy servers and tunneling - HTTP
tion-dependent content. a common way to disclose this information is by using the following http headers: the standardized header: forwarded contains information from the client-facing side of proxy servers that is altered or lost when a proxy is involved in the path of the request. ...
...ins information from the client-facing side of proxy servers that is altered or lost when a proxy is involved in the path of the request. or the de-facto standard versions: x-forwarded-for identifies the originating ip addresses of a client connecting to a web server through an http proxy or a load balancer. x-forwarded-host identifies the original host requested that a client used to connect to your proxy or load balancer. x-forwarded-proto identifies the protocol (http or https) that a client used to connect to your proxy or load balancer. to provide information about the proxy itself (not about the client connecting to it), the via header can be used. via added by proxies, both forward and reverse proxies, and can appear in the request headers and the response headers. ...
...d by proxies, both forward and reverse proxies, and can appear in the request headers and the response headers. http tunneling tunneling transmits private network data and protocol information through public network by encapsulating the data. http tunneling is using a protocol of higher level (http) to transport a lower level protocol (tcp). the http protocol specifies a request method called connect. it starts two-way communications with the requested resource and can be used to open a tunnel. this is how a client behind an http proxy can access websites using ssl (i.e. https, port 443). note, however, that not all proxy servers support the connect method or limit it to port 443 only. see also the http tunnel article on wikipedia. proxy auto-configuration (pac) a proxy auto-configuration ...

HTTP Public Key Pinning (HPKP) - HTTP
ed. to ensure the authenticity of a server's public key used in tls sessions, this public key is wrapped into a x.509 certificate which is usually signed by a certificate authority (ca). web clients such as browsers trust a lot of these cas, which can all create certificates for arbitrary domain names. if an attacker is able to compromise a single ca, they can perform mitm attacks on various tls connections. hpkp can circumvent this threat for the https protocol by telling the client which public key belongs to a certain web server. hpkp is a trust on first use (tofu) technique. the first time a web server tells a client via a special http header which public keys belong to it, the client stores this information for a given period of time. when the client visits the server again, it expects at ...
... -in my-signing-request.csr -pubkey -noout | openssl pkey -pubin -outform der | openssl dgst -sha256 -binary | openssl enc -base64 openssl x509 -in my-certificate.crt -pubkey -noout | openssl pkey -pubin -outform der | openssl dgst -sha256 -binary | openssl enc -base64 the following command will extract the base64 encoded information for a website. ...
...all subdomains, which is told by the includesubdomains declaration. finally, report-uri="https://www.example.net/hpkp-report" explains where to report pin validation failures. report-only header instead of using a public-key-pins header you can also use a public-key-pins-report-only header. this header only sends reports to the report-uri specified in the header and does still allow browsers to connect to the webserver even if the pinning is violated. setting up your webserver to include the hpkp header the concrete steps necessary to deliver the hpkp header depend on the web server you use. note: these examples use a max-age of two months and include all subdomains. it is advised to verify that this setup will work for your server. hpkp has the potential to lock out users for a long tim...

Web video codec guide - Web media technologies
andard. while in general, mpeg-4 part 2 video is not used by anyone because of its lack of compelling value related to other codecs, mp4v-es does have some usage on mobile. mp4v is essentially h.263 encoding in an mpeg-4 container. its primary purpose is to be used to stream mpeg-4 audio and video over an rtp session. however, mp4v-es is also used to transmit mpeg-4 audio and video over a mobile connection using 3gp. you almost certainly don't want to use this format, since it isn't supported in a meaningful way by any major browsers, and is quite obsolete. files of this type should have the extension .mp4v, but sometimes are inaccurately labeled .mp4. supported bit rates 5 kbps to 1 gbps and more supported frame rates no specific limit; restricted only by the data rate...
... 3gp, ogg, webm rtp / webrtc compatible yes; vp8 is one of the spec-required codecs for webrtc supporting/maintaining organization google specification rfc 6386 licensing open and free of royalties and any other licensing requirements [1] edge support for vp8 requires the use of media source extensions. [2] safari only supports vp8 in webrtc connections. [3] firefox only supports vp8 in mse when no h.264 hardware decoder is available. use mediasource.istypesupported() to check for availability. vp9 video processor 9 (vp9) is the successor to the older vp8 standard developed by google. like vp8, vp9 is entirely open and royalty-free. its encoding and decoding performance is comparable to or slightly faster than that of avc, but with better...
... compression is by definition less effective than lossy compression. for example, uncompressed 1080p video (1920 by 1080 pixels) with 4:2:0 chroma subsampling needs at least 1.5 gbps. using lossless compression such as ffv1 (which is not supported by web browsers) could perhaps reduce that to somewhere around 600 mbps, depending on the content. that's still a huge number of bits to pump through a connection every second, and is not currently practical for any real-world use. this is the case even though some of the lossy codecs have a lossless mode available; the lossless modes are not implemented in any current web browsers. the best you can do is to select a high-quality codec that uses lossy compression and configure it to perform as little compression as possible. one way to do this is to co...

Introduction to progressive web apps - Progressive web apps (PWAs)
nly a rough indicator. there are some key principles a web app should try to observe to be identified as a pwa. it should be: discoverable, so the contents can be found through search engines. installable, so it can be available on the device's home screen or app launcher. linkable, so you can share it by simply sending a url. ...
... offering these features and making use of all the advantages offered by web applications can create a compelling, highly flexible offering for your users and customers. ...
...x installation process. this is how it has always been. network independence modern web apps can work when the network is unreliable, or even non-existent. the basic ideas behind network independence are to be able to: revisit a site and get its contents even if no network is available. browse any kind of content the user has previously visited at least once, even under situations of poor connectivity. control what is shown to the user in situations where there is no connectivity. this is achieved using a combination of technologies: service workers to control page requests (for example storing them offline), the cache api for storing responses to network requests offline (very useful for storing site assets), and client-side data storage technologies such as web storage and indexeddb ...

Paths - SVG: Scalable Vector Graphics
lways unitless and hence in the user coordinate system. later, we will learn how paths can be transformed to suit other needs. line commands there are five line commands for <path> nodes. the first command is the "move to" or m, which was described above. it takes two parameters, a coordinate (x) and coordinate (y) to move to. if the cursor was already somewhere on the page, no line is drawn to connect the two positions. the "move to" command appears at the beginning of paths to specify where the drawing should start. for example: m x y (or) m dx dy in the following example there's only a point at (10,10). note, though, that it wouldn't show up if a path was just drawn normally. for example: <svg width="200" height="200" xmlns="http://www.w3.org/2000/svg"> <path d="m10 10"/> <!-- po...
...lts, although the cubic one allows greater freedom in exactly what the curve looks like. deciding which curve to use is situational and depends on the amount of symmetry the line has. arcs the other type of curved line that can be created using svg is the arc, called with the a command. arcs are sections of circles or ellipses. for a given x-radius and y-radius, there are two ellipses that can connect any two points (as long as they're within the radius of the circle). along either of those circles, there are two possible paths that can be taken to connect the points—so in any situation, there are four possible arcs available. because of that, arcs require quite a few parameters: a rx ry x-axis-rotation large-arc-flag sweep-flag x y a rx ry x-axis-rotation large-arc-flag sweep-flag dx dy...
...lso much more powerful. complete circles and ellipses are the only shapes that svg arcs have trouble drawing. because the start and end points for any path going around a circle are the same point, there are an infinite number of circles that could be chosen, and the actual path is undefined. it's possible to approximate them by making the start and end points of the path slightly askew, and then connecting them with another path segment. for example, it's possible to make a circle with an arc for each semi-circle. at that point, it's often easier to use a real <circle> or <ellipse> node instead. this interactive demo might help understand the concepts behind svg arcs: http://codepen.io/lingtalfi/pen/yalwjg (tested in chrome and firefox only, might not work in your browser) « previousnext ...

remote/parent - Archive of obsolete content
ocesses created in the future. this is a shortcut for enumerating existing processes and then listening for attach events. properties port an event emitter that sends messages to and receives messages from all processes. events attach event emitted when a new process is started. the event handler is called with a process representing the new process. detach event emitted when a process disconnects from the application. it may have been closed normally or it may have crashed. the event handler is called with the process that detached. frames a list of the content frames across all processes. each element in this list is a frame. listen to attach and detach events to hear as frames are created and destroyed. const { frames } = require("sdk/remote/parent"); frames.on("attach", function(f...
...at detached. process a process provides a way to communicate with code running in one of the application's processes. properties port an event emitter that can be used to send and receive events to and from code running in the process. isremote a boolean property that indicates whether the attached process is remote from the main process. events detach event emitted when this process disconnects from the application. it may have been closed normally or it may have crashed. frame a frame provides a way to pass frame specific messages to code in other processes. the frame this relates to may be in any of the application's processes. properties port an event emitter that can be used to send and receive frame specific events to and from code running in any process. frameelement the d...

Inner-browsing extending the browser navigation paradigm - Archive of obsolete content
information, and view resources listed as references on that page. html and web standards have evolved and now offer flexible and fine-grained control to layout as well supporting dhtml, powerful programming languages like javascript, and additional media through embeddable third-party resources like flash, java, vrml, etc. additionally, server-side technologies have also evolved, supporting and connecting different resources to different browsers. despite all the evolution, we still see the underpinnings of the original model in modern web sites. we still connect through a set of links that mostly drive us to a new page, and we still occasionally lose track of where we are. also, on the server side, the server often has to rebuild all of the context of the user interface with each new request. ...
...on the flexibility to easily access and manage all message headers in mail applications (like netscape mail or eudora) is probably one of the useful features when compared with web-based mail applications. in general, when a webmail account has more than a few messages, clicking 'next page' sends a request to the server. you receive a new page with the next block of message headers. on slow speed connections, this process can be slow and frustrating. with inner browsing, a simple request to retrieve the next set of message headers that replace the currently viewed message headers can dramatically improve user experience. implementing inner-browsing on top of html pages modern browsers have good support for the w3c dom and javascript allowing fine-grained control over page content. instead of forc...

List of Mozilla-Based Applications - Archive of obsolete content
aol instant messenger im client uses nss apache web server doesn't use nss by default, but can be configured to use nss with mod_nss ssl module apicawatch site performance monitoring tool uses firefox as part of its monitoring package astyle css editor editing tool atmail webmail client aviva for java mainframe connectivity product uses mozilla rhino babelgum internet tv service basilisk pre-servo xul-based web browser uses most of the firefox 55 source code batik java-based toolkit uses mozilla rhino bitbox security focused browser seemingly based on firefox blackbird browser for african american community bluegriffon w...
... management tool automatic uploader is a xulrunner application that runs headless in xvfb wikipediaondvd and wikimedia by moulin offline versions of wikipedia blog post about projects wine implementation of the windows api uses mozilla spidermonkey and the gecko activex control worksmart.net suite of web-based workplace apps uses prism wxwebconnect web browser control library wyzo browser xb browser anonymous web browser xbusiness create and send branded invoices, quotes or estimates xdf billing and quotes software xiphos bible study software xmldbeditor database editor xpud linux desktop xpud: linux with an xul interface, 1...

HTTP Class Overview - Archive of obsolete content
guide to developers wishing to understand or extend the mozilla http implementation. ...
... cache holds references to frequently used services nshttpchannel implements nsihttpchannel talks to the cache initiates http transactions processes http response codes intercepts progress notifications nshttpconnection implements nsistreamlistener & nsistreamprovider talks to the socket transport service feeds data to its transaction object routes progress notifications nshttpconnectioninfo identifies a connection nshttptransaction implements nsirequest encapsulates a http request and response parses incoming data nshttpchunkeddecoder owned by a transaction strips chunked transfer encoding nshttprequesthead owns a nshttpheaderarray knows how to fill a request buffer nshttpresponsehead owns a nshttpheaderarray knows how to parse response lines perf...

Running Tamarin acceptance tests - Archive of obsolete content
our android device and can run both direct and shell-type commands. if you've correctly edited and run the android-vars.sh script mentioned on the tamarin build documentation page you should already be pathed to the adb executable in the public sdk/ndk, but if not it exists at /android-public/android-sdk-mac_86/platform-tools. adb supports ssh-like commands to an android device. adb automatically connects to a phone if connected by usb. adb shell "ls /" is a good test to see if connected. the command: $ adb devices lists the device id of each phone. if you have more than 1 phone connected to usb, use "adb -s " for each phone. if this fails, do you have a dev os installed? under settings->applications->development, is usb debugging enabled? testsuite setup example commands: copy avmshell to /d...
...lel and reduces running times dramatically. you must, in any case, at least use --androidthreads or --threads=1 (or will fail due to multiple tests running). $ cd tamarin-redux/test/acceptance $ ./runtests.py --androidthreads note on using an emulator: the emulator does seem to support hardware floating point but gives a buserror when running avmshell -darm_vfp. it's unreliable, losing its adb connection frequently. an emulator is ok for testing a few abc files but for any consistency a real device is better. ...

Running Tamarin performance tests - Archive of obsolete content
our android device and can run both direct and shell-type commands. if you've correctly edited and run the android-vars.sh script mentioned on the tamarin build documentation page you should already be pathed to the adb executable in the public sdk/ndk, but if not it exists at /android-public/android-sdk-mac_86/platform-tools. adb supports ssh-like commands to an android device. adb automatically connects to a phone if connected by usb. adb shell "ls /" is a good test to see if connected. the command: $ adb devices lists the device id of each phone. if this fails, do you have a dev os installed? under settings->applications->development, is usb debugging enabled? testsuite setup example commands: root the phone $ adb root copy avmshell to /data/app. the shell can be named variously in the build b...
...threads or --threads=1 as with the acceptance tests; in fact, a usage error will result. just type the following commands after making sure you've set the environment variables correctly. $ cd /test/performance $ ./runtests.py note on using an emulator: the emulator does seem to support hardware floating point but gives a buserror when running avmshell -darm_vfp. it's unreliable, losing its adb connection frequently. an emulator is ok for testing a few abc files but for any consistency a real device is better. ...

Tamarin build documentation - Archive of obsolete content
run the application: $ avmshell hello.abc hello, world use the -help options of asc.jar and avmshell for more details. ...
...tamarin performance tests building tamarin windows mobile utilities the tamarin windows mobile utilities allows the existing acceptance and performance testsuites to be run on a windows mobile device connected to a windows desktop machine by activesync or windows mobile device center (for windows vista and windows 7). setup and run activesync or windows mobile device center. ...

The life of an HTML HTTP request - Archive of obsolete content
the webshell as nsicontentviewercontainer to the docloader.] (2) the document loader calls ns_openuri with the url to begin transfering the requested file. necko (the network library) checks the url scheme (the first part of the url, http: in this case) and locates the correct nsiprotocolhandler (in this case nshttphandler) and asks it for a nsichannel (nshttpchannel). the channel represents the connection to the server, and is the source of the html data stream. (3) when data is starting to come from the webserver the nsichannel calls the onstartrequest in the documenloader. now the channel knows the content type of the incoming data, so the documentloader can find an nsidocumentloaderfactory for the "text/html" content type (in this case an nslayoutdlf). this factory is then told to create a ...
...ases (including this) it also creates a nsidocument (nshtmldocument) and binds it to the contentviewer. the contentviewer is then embed():ed into the contentviewercontainer (the webshell). (4) the document then creates a nsiparser for parsing the input stream. for html document this is an nsparser, which also implements nsistreamlistener. this streamlistener is returned to the documentloader and connected to the nsichannel of the request. (5) the document (nshtmldocument) also creates a nsicontentsink (nshtmlcontentsink) and connects it to the parser and the document. the parser then parses the stream it gets via its streamlistener interface and converts it to nsiparsernodes which it places in the contentsink. the parser typically gets data from the stream in 8kb blocks and parses these blocks...

A XUL Bestiary - Archive of obsolete content
on object model in the hierarchy of xul widgets: browser, menu, menuitem, and so on. the dom and the aom form a kind of continuum, the whole of which is manipulable from the standards upon which xul is based. near synonyms for xul there is much confusion about the words that begin with "x" in the mozilla open source project. the mozilla xparchitecture section below describes xpcom, xpidl, and xpconnect, three somewhat related technologies for getting access to application code from the interface. this section describes xul, xptoolkit, and xpfe, which are in some respects synonymous and in others quite different. in briefest terms, xul is the xml-based language used for creating interfaces, xptoolkit is the set of xul widgets (menus, toolbar, etc.) actually assembed for this purpose -- the buil...
...s rules for design and compilation that make it possible to use the services of an object without knowing anything about implementation. xpidl, the cross-platform interface definition language, is a language in which these interfaces insisted upon by xpcom can be described. when xpidl is used to describe the xpcom interfaces, it makes those interfaces available in special header files. finally, xpconnect is the technology that connects these xpcom/xpidl interfaces to javascript, the scripting language xul uses. these three cross-platform glue technologies fit in the middle of an architecture that looks something like this: author: ian oeschger other documents: mozilla jargon file and introduction to xul original document information author(s): ian oeschger last updated date: april 16, 2...

statustext - Archive of obsolete content
used to set the text that appears on the status bar when the user moves the mouse over the element. mozilla doesn't adjust the status bar automatically however. this attribute serves only as a place to keep the text. in firefox, this text is automatically placed in the statusbar for menuitems on the menu bar. ...
...t that appears on the status bar when the user moves the mouse over the element. mozilla doesn't adjust the status bar automatically however. this attribute serves only as a place to keep the text. in firefox, this text is automatically placed in the statusbar for menuitems on the menu bar. ...

XPCOM Interfaces - Archive of obsolete content
object model), which is the object system that mozilla uses. calling native objects by using xul we can build a complex user interface. we can attach scripts which modify the interface and perform tasks. however, there are quite a number of things that cannot be performed directly with javascript. for example, if we wanted to create a mail application, we would need to write scripts which would connect to mail servers to retrieve and send mail. javascript does not have the capability to do such things. the only way to handle this would be to write native code that would get mail. we also need to have a way for our scripts to call the native code easily. mozilla provides such a method which involves using xpcom (cross-platform component object model). mozilla provides many xpcom components and...
...ings that javascript cannot do itself. however, there is a way in which you can call them, which we will see shortly. we can call any of the functions provided by the component as described by the interfaces it implements. for example, once we have a component, we can check if it implements nsisound, and, if so, we can play sound through it. the process of calling xpcom from a script is called xpconnect, which is a layer which translates script objects into native objects. creating xpcom objects there are three steps to calling an xpcom component. get a component get the part of the component that implements the interface that we want to use. call the function we need once you've done the first two steps, you can repeat the last step as often as necessary. let's say we want to rename a ...

preference - Archive of obsolete content
« xul reference home [ examples | attributes | properties | methods | related ] declares a preference that may be adjusted in a prefpane. this element must be placed inside a preferences element. each preference element corresponds to a preference which is stored in the user's preferences file. you can connect a user interface element such as a checkbox to a preference element using the user interface element's preference attribute. more information is available in the preferences system article. attributes disabled, instantapply, inverted, name, onchange, readonly, tabindex, type properties defaultvalue, disabled, hasuservalue, inverted, locked, name, preferences, readonly, tabindex, type, value, valuefrompreferences methods reset examples <preferences> <prefer...
... tabindex type: integer the tab order of the element. the tab order is the order in which the focus is moved when the user presses the "tab" key. elements with a higher tabindex are later in the tab sequence. type type: one of the values below the preference type which should be one of the following values. bool a boolean set to either true or false. usually a checkbox would be connected to these preferences. int an integer string a string unichar a unicode string wstring a localized string. in this situation the preference will save the path to a property file which contains the actual value of the preference. file a file. the file path will be stored in the preferences. properties defaultvalue (readonly) returns the default value of the prefer...

Introduction to Public-Key Cryptography - Archive of obsolete content
steps shown in figure 4: in response to an authentication request from the server, the client displays a dialog box requesting the user's name and password for that server. the user must supply a name and password separately for each new server the user wishes to use during a work session. the client sends the name and password across the network, either in the clear or over an encrypted ssl connection. the server looks up the name and password in its local password database and, if they match, accepts them as evidence authenticating the user's identity. the server determines whether the identified user is permitted to access the requested resource, and if so allows the client to access it. with this arrangement, the user must supply a new password for each server, and the administrator ...
...ificate chain, starting with the certificate being presented for authentication: the certificate validity period is checked against the current time provided by the verifier's system clock. the issuer's certificate is located. the source can be either the verifier's local certificate database (on that client or server) or the certificate chain provided by the subject (for example, over an ssl connection). the certificate signature is verified using the public key in the issuer's certificate. if the issuer's certificate is trusted by the verifier in the verifier's certificate database, verification stops successfully here. otherwise, the issuer's certificate is checked to make sure it contains the appropriate subordinate ca indication in the red hat certificate type extension, and chain veri...

RDF in Mozilla FAQ - Archive of obsolete content
tasource is a locally-installed component that implements nsirdfdatasource. for example, the bookmarks service. first, check here to make sure you will be allowed to access a built-in datasource. there are several security restrictions on accessing built-in datasources from "untrusted" xul and js. since a built-in datasource is just an xpcom component, you can instantiate it directly using the xpconnect component manager. // use the component manager to get the bookmarks service var bookmarks = components. classes["@mozilla.org/rdf/datasource;1?name=bookmarks"]. getservice(components.interfaces.nsirdfdatasource); // now do something interesting with it... if (bookmarks.hasassertion( rdf.getresource("http://home.netscape.com/nc-rdf#bookmarksroot"), rdf.getresource("http://home.n...
...ngside duplicates.xul. note that for these to work, you have to relax mozilla's security model. to do this, add the following line to your preferences file. (shut down mozilla first since it overwrites your preferences file when you quit.) user_pref("signed.applets.codebase_principal_support", true); mozilla will ask you if you want to grant the scripts in duplicates.xul permission to access xpconnect; respond in the affirmative. currently, mozilla does not allow unprivileged access to the rdf interfaces and services; see bug 122846 for details. please mail danbri, mozilla-rdf or waterson with urls if you are aware of other examples to which we ought to link! notes see also w3c rdf and semantic web pages for more information on rdf and related technologies. contributors examples sec...

Archive of obsolete content
e distributed and modified freely. no guarantee of factuality in this faq is made, and it is maintained by pat gunn, who is not affiliated with netscape. various other people have contributed to this faq. newsgroup summaries obsolete: xpcom-based scripting for npapi plugins plugins that used to take advantage of being scriptable via liveconnect in 4.x netscape browsers lost this possibility in the new world. the main reason for this is that there is no guarantee of java compatibility on a binary level due to the jri/jni switch. the new mozilla xpcom architecture allows xpcom components be scriptable via a different mechanism called xpconnect. we leverage some of these ideas to help you make your netscape communicator 4...
...blog/hacking-digg-w...ug-and-jquery/ using io timeout and interrupt on nt this technical memo is a cautionary note on using netscape portable runtime's (nspr) io timeout and interrupt on windows nt 3.51 and 4.0. due to a limitation of the present implementation of nspr io on nt, programs must follow the following guideline: using ssh to connect to cvs using web standards in your web pages using workers in extensions this article shows you how to use worker threads in extensions to perform tasks in the background without blocking the user interface. web standards the web standards project windows media in netscape netscape 7.1 has the a...

Introduction to game development for the Web - Game development
fects and music. if your needs are more involved, check out the web audio api for real audio processing power! indexeddb a powerful data storage api for maintaining user data on their own computer or device. a great way to save game state and other information locally so it doesn't have to be downloaded every time it's needed. also useful to help make your game playable even when the user isn't connected to the web (such as when they're stuck on an airplane for hours on end). javascript javascript, the programming language used on the web, is blazing fast in modern browsers and getting faster all the time. use its power to write the code for your game, or look at using technologies like emscripten or asm.js to easily port your existing games. pointer lock api the pointer lock api lets you l...
...is a web-supported implementation of opengl es 2.0. webrtc the webrtc (real-time communications) api gives you the power to control audio and video data, including teleconferencing and transmitting other application data back and forth between two users. want your players to be able to talk to each other while blowing up monsters? this is the api for you. websockets the websocket api lets you connect your app or site to a server to transmit data back and forth in real-time. perfect for multiplayer gaming action, chat services, and so forth. web workers workers give you the ability to spawn background threads running their own javascript code, to take advantage of modern, multi-core processors. xmlhttprequest and file api the combination of xmlhttprequest and the file api lets you send and...

Explaining basic 3D theory - Game development
tex can use to decorate the surface it is part of instead of a simple color. you can build geometry using this information — here is an example of a cube: a face of the given shape is a plane between vertices. for example, a cube has 8 different vertices (points in space) and 6 different faces, each constructed out of 4 vertices. a normal defines which way the face is directed in. also, by connecting the points we're creating the edges of the cube. the geometry is built from a vertex and the face, while material is a texture, which uses a color or an image. if we connect the geometry with the material we will get a mesh. rendering pipeline the rendering pipeline is the process by which images are prepared and output onto the screen. the graphics rendering pipeline takes the 3d objects bu...
...ngs. it sets up what can be seen by the camera — the configuration includes field of view, aspect ratio and optional near and far planes. read the camera paragraph in the three.js article to learn about those. the last step is viewport transformation, which involves outputting everything for the next step in the rendering pipeline. rasterization rasterization converts primitives (which are connected vertices) to a set of fragments. those fragments — which are 3d projections of the 2d pixels — are aligned to the pixel grid, so eventually they can be printed out as pixels on a 2d screen display during the output merging stage. fragment processing fragment processing focuses on textures and lighting — it calculates final colors based on the given parameters. textures textures a...

WebRTC data channels - Game development
the webrtc (web real-time communications) api is primarily known for its support for audio and video communications; however, it also offers peer-to-peer data channels. this article explains more about this, and shows you how to use libraries to implement data channels in your game. what is a data channel? a webrtc data channel lets you send text or binary data over an active connection to a peer. in the context of a game, this lets players send data to each other, whether text chat or game status information. data channels come in two flavors. reliable channels guarantee that messages you send arrive at the other peer and in the same order in which they're sent. this is analogous to a tcp socket. unreliable channels make no such guarantees; messages aren't guaranteed to arrive in a...
...using webrtc. this article, however, will take advantage of some libraries that can help trivialize the work, and will demonstrate ways to use abstraction to work around implementation differences between browsers. hopefully, of course, those differences will fade away in time. using the p2p library one library you can use is the p2p library. this library provides a simple api for creating peer connections and setting up streams and data channels. there's also a broker server component and a hosted broker you can use instead of having to set one up for yourself. note: we will continue to add content here soon; there are some organizational issues to sort out. original document information author(s): alan kligman source article: webrtc data channels for great multiplayer other contribu...

Plug-in Development Overview - Gecko Plugin API Reference
see the wikipedia article for historical information. both technologies are now obsolete for the purposes of plug-in scriptability, and the cross-browser npruntime api should be used instead. see the scripting plugins section of this reference for the details. building plug-ins once you have added the special code and additional files ...
...see the wikipedia article for historical information. both technologies are now obsolete for the purposes of plug-in scriptability, and the cross-browser npruntime api should be used instead. see the scripting plugins section of this reference for the details. building plug-ins once you have added the special code and additional files to make your plug-in...

Distributed Denial of Service - MDN Web Docs Glossary: Definitions of Web-related terms
et security. ...
...ergency readiness team (us-cert) defines symptoms of denial-of-service attacks to include: unusually slow network performance (opening files or accessing websites) unavailability of a particular website inability to access any website dramatic increase in the number of spam emails received—(this type of dos attack is considered an email bomb) disconnection of a wireless or wired internet connection longterm denial of access to the web or any internet services learn more general knowledge denial-of-service attack on wikipedia ...

Domain sharding - MDN Web Docs Glossary: Definitions of Web-related terms
browsers limit the number of active connections for each domain. to enable concurrent downloads of assets exceeding that limit, domain sharding splits content across multiple subdomains. when multiple domains are used to serve multiple assets, browsers are able to download more resources simultaneously, resulting in a faster page load time and improved user experience. the problem with domain sharding, in terms of performance, is the cost of extra dns lookups for each domain and the overhead of establishing each tcp connection. the initial response from an http request is generally an html file listing other resources such as javascript, css, images and other media files that need to be downloaded. ...
...roved user experience. the problem with domain sharding, in terms of performance, is the cost of extra dns lookups for each domain and the overhead of establishing each tcp connection. the initial response from an http request is generally an html file listing other resources such as javascript, css, images and other media files that need to be downloaded. as browsers limit the number of active connections per domain, serving all the required resources from a single domain could be slow as assets need to be downloaded sequentially. with domain sharding, the required downloads are served from more than one domain, enabling the browser to simultaneously download needed resources. multiple domains, however, is an anti-pattern, as dns lookups slow initial load times. http2 supports unlimited concu...

MitM - MDN Web Docs Glossary: Definitions of Web-related terms
back, and the mailman would again open the letter, read it, eventually modify it, repackage it, and give it to you. you wouldn't know there's a man in the middle in your communication channel – the mailman is invisible to you and to your recipient. in physical mail and in online communication, mitm attacks are tough to defend. a few tips: don't just ignore certificate warnings. you could be connecting to a phishing server or an imposter server. sensitive sites without https encryption on public wi-fi networks aren't trustworthy. check for https in your address bar and ensure encryption is in-place before logging in. learn more owasp article: man-in-the-middle attack wikipedia: man-in-the-middle attack the public-key-pins header (hpkp) can significantly decrease the risk of mitm by...
... encryption on public wi-fi networks aren't trustworthy. check for https in your address bar and ensure encryption is in-place before logging in. learn more owasp article: man-in-the-middle attack wikipedia: man-in-the-middle attack the public-key-pins header (hpkp) can significantly decrease the risk of mitm by instructing browsers to require a whitelisted certificate for all subsequent connections to that website. ...

QUIC - MDN Web Docs Glossary: Definitions of Web-related terms
quick udp internet connection, or quic, is an experimental multiplexed transport protocol implemented on udp. it was developed by google as a way to experiment with ways to improve tcp and web application delivery. as tcp is built into the kernel of many operating systems being able to experiment with changes, test them and implement modifications is an extremely slow process. the creation of quic allows developers to conduct experiments and try new things faster. quic was designed to support the semantics of http/2. it provides multiplexing, flow control, security and congestion control. key features of quic include: reduction in connection establishment time. improved congestion control. multiplexing without head-of-line blocking. ...
.... the creation of quic allows developers to conduct experiments and try new things faster. quic was designed to support the semantics of http/2. it provides multiplexing, flow control, security and congestion control. key features of quic include: reduction in connection establishment time. improved congestion control. multiplexing without head-of-line blocking. forward error correction. connection migration. there is limited browser and server support for quic today. resources chromium projects documentation ietf draft see also http/2 ...

Server - MDN Web Docs Glossary: Definitions of Web-related terms
a hardware server is a shared computer on a network, usually powerful and housed in a data center. a software server (often running on a hardware server) is a program that provides services to client programs or a user interface to human clients. services are provided generally over local area networks or wide area networks such as the internet. ...
...er. a software server (often running on a hardware server) is a program that provides services to client programs or a user interface to human clients. services are provided generally over local area networks or wide area networks such as the internet. a client program and server program traditionally connect by passing messages encoded using a protocol over an api. ...

Session Hijacking - MDN Web Docs Glossary: Definitions of Web-related terms
ause no account lockout for invalid session ids weak session-id generation algorithm insecure handling indefinite session expiration time short session ids transmission in plain text session hijacking process sniff, that is perform a man-in-the-middle (mitm) attack, place yourself between victim and server. monitor packets flowing between server and user. ...
...in-the-middle (mitm) attack, place yourself between victim and server. monitor packets flowing between server and user. break the victim machine's connection. take control of the session. inject new packets to the server using the victim's session id. ...

TCP handshake - MDN Web Docs Glossary: Definitions of Web-related terms
tcp (transmission control protocol) is a transport layer host-to-host protocol for connection-oriented communication between two computers on an ip network. tcp uses a three-way handshake (aka tcp-handshake, three message handshake, and/or syn-syn-ack) to set up a tcp/ip connection over an ip based network. the three messages transmitted by tcp to negotiate and start a tcp session are nicknamed syn, syn-ack, and ack for synchronize, synchronize-acknowledgement, and acknowledge respectively. the three message mechanism is designed so that two computers that want to pass information back and forth to each other can negotiate the parameters of the connection before transmitting data such as http browser requests. the host, generally the browser, sends a tcp synchronize packet to the server.
...ation back and forth to each other can negotiate the parameters of the connection before transmitting data such as http browser requests. the host, generally the browser, sends a tcp synchronize packet to the server. the server receives the syn and sends back a synchronize-acknowledgement. the host receives the server's syn-ack and sends an acknowledge. the server receives ack and the tcp socket connection is established. this handshake step happens after a dns lookup and before the tls handshake, when creating a secure connection. the connection can be terminated independently by each side of the connection via a four-way handshake. ...

TCP slow start - MDN Web Docs Glossary: Definitions of Web-related terms
tcp slow start helps buildup transmission speeds to the network's capabilities. it does this without initially knowing what those capabilities are and without creating congestion. tcp slow start is an algorithm used to detect the available bandwidth for packet transmission, and balances the speed of a network connection. it prevents the appearance of network congestion whose capabilities are initially unknown, and slowly increases the volume of information diffused until the network's maximum capacity is found. to implement tcp slow start, the congestion window (cwnd) sets an upper limit on the amount of data a source can transmit over the network before receiving an acknowledgment (ack). the slow start threshold (ssthresh) determines the (de)activation of slow start. when a new conne...
...window is incremented until the cwnd is less than ssthresh. slow start also terminates when congestion is experienced. congestion control congestion itself is a state that happens within a network layer when the message traffic is too busy it slows the network response time. the server sends data in tcp packets, the user's client then confirms delivery by returning acknoledgements, or acks. the connection has a limited capacity depending on hardware and network conditions. if the server sends too many packets too quickly, they will be dropped. meaning, there will be no acknowledgement. the server registers this as missing acks. congestion control algorithms use this flow of sent packets and acks to determine a send rate. see also populating the page: how browsers work http overview ...

Transport Layer Security (TLS) - MDN Web Docs Glossary: Definitions of Web-related terms
ver protocols that ensure communication privacy by using cryptographic protocols to provide security over a network. when a server and client communicate using tls, it ensures that no third party can eavesdrop or tamper with any message. ...
...tablish a secure connection. it is possible for both the client and server to mutually authenticate each other, if both parties provide their own individual digital certificates. note: tls 1.0 and 1.1 support will be removed from all major browsers in early 2020; you'll need to make sure your web server supports tls 1.2 or 1.3 going forward. from version 74 onwards, firefox will return a secure connection failed error when connecting to servers using the older tls versions (bug 1606734). ...

Transmission Control Protocol (TCP) - MDN Web Docs Glossary: Definitions of Web-related terms
tcp (transmission control protocol) is a transport layer host-to-host protocol for connection-oriented communication between two computers on an ip network. tcp uses virtual ports to create a virtual end-to-end connection that can reuse the physical connections between two computers. tcp encapsulates higher level protocol data such as http and, smtp (email) . tcp handshake the tcp three-way handshake, also called the tcp-handshake, three message handshake, and/or syn-syn-ack, is the method used by tcp to set up a tcp/ip connection over an ip-based network. the three messages transmitted by tcp to negotiate and start a tcp session are nicknamed syn, syn-ack, ack for synchronize, synchronize-acknowledgement, and acknowledge. the three message mechanism is designed for the two computers th...
... is the method used by tcp to set up a tcp/ip connection over an ip-based network. the three messages transmitted by tcp to negotiate and start a tcp session are nicknamed syn, syn-ack, ack for synchronize, synchronize-acknowledgement, and acknowledge. the three message mechanism is designed for the two computers that want to pass information back and forth and can negotiate the parameters of the connection before transmitting data such as http browser requests. ...

World Wide Web - MDN Web Docs Glossary: Definitions of Web-related terms
the web is not the same as the internet: the web is one of many applications built on top of the internet. tim berners-lee proposed the architecture of what became known as the world wide web. he created the first web server, web browser, and webpage on his computer at the cern physics research lab in 1990. in 1991, he announced his creation on the alt.hypertext newsgroup, marking the moment the web was first made public. ...
...components: the http protocol governs data transfer between a server and a client. to access a web component, a client supplies a unique universal identifier, called a url (uniform resource location) or uri (uniform resource identifier) (formally called universal document identifier (udi)). html (hypertext markup language) is the most common format for publishing web documents. linking, or connecting resources through hyperlinks, is a defining concept of the web, aiding its identity as a collection of connected documents. soon after inventing the web, tim berners-lee founded the w3c (world wide web consortium) to standardize and develop the web further. this consortium consists of core web interest groups, such as web browser developers, government entities, researchers, and universities.

What is accessibility? - Learn web development
y, including what it is, and how it affects you as a web developer. so what is accessibility? accessibility is the practice of making your websites usable by as many people as possible. we traditionally think of this as being about people with disabilities, but the practice of making sites accessible also benefits other groups such as those using mobile devices, or those with slow network connections. you might also think of accessibility as treating everyone the same, and giving them equal opportunities, no matter what their ability or circumstances. just as it is wrong to exclude someone from a physical building because they are in a wheelchair (modern public buildings generally have wheelchair ramps or elevators), it is also not right to exclude someone from a website because they hav...
...t like any other bug, an accessibility problem becomes more expensive to fix the later it is discovered. bear in mind that a lot of accessibility best practices benefit everyone, not just users with disabilities. for example, lean semantic markup is not only good for screen readers, but it is also fast to load and performant. this benefits everyone, especially those on mobile devices and/or slow connections. publish an accessibility statement on your site and engage with people having problems. accessibility guidelines and the law there are numerous checklists and sets of guidelines available for basing accessibility tests on, which might seem overwhelming at first glance. our advice is to familiarize yourself with the basic areas in which you need to take care, as well as understanding the ...

What is a Domain Name? - Learn web development
prerequisites: first you need to know how the internet works and understand what urls are. objective: learn what domain names are, how they work, and why they are important. summary domain names are a key part of the internet infrastructure. they provide a human-readable address for any web server available on the internet. any internet-connected computer can be reached through a public ip address, either an ipv4 address (e.g. 173.194.121.32) or an ipv6 address (e.g., 2027:0da8:8b73:0000:0000:8a2e:0370:1337). computers can handle such addresses easily, but people have a hard time finding out who's running the server or what service the website offers. ip addresses are hard to remember and might change over time. to solve all those problems we use human...
...ly fill up with unused domain names that were locked and couldn't be used by anyone. instead, you pay for the right to use a domain name for one or more years. you can renew your right, and your renewal has priority over other people's applications. but you never own the domain name. companies called registrars use domain name registries to keep track of technical and administrative information connecting you to your domain name. note : for some domain name, it might not be a registrar which is in charge of keeping track. for instance, every domain name under .fire is managed by amazon. finding an available domain name to find out whether a given domain name is available, go to a domain name registrar's website. most of them provide a “whois” service that tells you whether a domain ...

What is a web server? - Learn web development
you will learn what a web server is and gain a general understanding of how it works. summary the term web server can refer to hardware or software, or both of them working together. on the hardware side, a web server is a computer that stores web server software and a website's component files. (for example, html documents, images, css stylesheets, and javascript files) a web server connects to the internet and supports physical data interchange with other devices connected to the web. on the software side, a web server includes several parts that control how web users access hosted files. at a minimum, this is an http server. an http server is software that understands urls (web addresses) and http (the protocol your browser uses to view webpages). an http server can be accessed t...
...uments and their related assets, including images, css stylesheets, javascript files, fonts, and video. technically, you could host all those files on your own computer, but it's far more convenient to store files all on a dedicated web server because: a dedicated web server is typically more available. (up and running) excusing downtime and systems troubles, a dedicated web server is always connected to the internet. a dedicated web server can have the same ip address all the time. this is known as a dedicated ip address. (not all isps provide a fixed ip address for home lines) a dedicated web server is typically maintained by a third-party. for all these reasons, finding a good hosting provider is a key part of building your website. examine the various services companies offer. choose...

Tips for authoring fast-loading HTML pages - Learn web development
these tips are based on common knowledge and experimentation. an optimized web page not only provides for a more responsive site for your visitors but also reduces the load on your web servers and internet connection. this can be crucial for high volume sites or sites which have a spike in traffic due to unusual circumstances such as breaking news stories. optimizing page load performance is not just for content which will be viewed by narrowband dial-up or mobile device visitors. it is just as important for broadband content and can lead to dramatic improvements even for your visitors with the fastest connections. tips reduce page weight page weight is by far the most important factor in page-load performance. reducing page weight through the elimination of unnecessary whitespace a...
...ges in the page structure. tools such as html tidy can automatically strip leading whitespace and extra blank lines from valid html source. other tools can "compress" javascript by reformatting the source or by obfuscating the source and replacing long identifiers with shorter versions. minimize the number of files reducing the number of files referenced in a web page lowers the number of http connections required to download a page, thereby reducing the time for these requests to be sent, and for their responses to be received. depending on a browser's cache settings, it may send a request with the if-modified-since header for each referenced file, asking whether the file has been modified since the last time it was downloaded. too much time spent querying the last modified time of the refer...

Graceful asynchronous programming with Promises - Learn web development
which is resolved with the mediastream once it's available. the code that the video chat application would use might look something like this: function handlecallbutton(evt) { setstatusmessage("calling..."); navigator.mediadevices.getusermedia({video: true, audio: true}) .then(chatstream => { selfviewelem.srcobject = chatstream; chatstream.gettracks().foreach(track => mypeerconnection.addtrack(track, chatstream)); setstatusmessage("connected"); }).catch(err => { setstatusmessage("failed to connect"); }); } this function starts by using a function called setstatusmessage() to update a status display with the message "calling...", indicating that a call is being attempted. it then calls getusermedia(), asking for a stream that has both video and audio tr...
...d setstatusmessage() to update a status display with the message "calling...", indicating that a call is being attempted. it then calls getusermedia(), asking for a stream that has both video and audio tracks, then once that's been obtained, sets up a video element to show the stream coming from the camera as a "self view," then takes each of the stream's tracks and adds them to the webrtc rtcpeerconnection representing a connection to another user. after that, the status display is updated to say "connected". if getusermedia() fails, the catch block runs. this uses setstatusmessage() to update the status box to indicate that an error occurred. the important thing here is that the getusermedia() call returns almost immediately, even if the camera stream hasn't been obtained yet. even if the han...

What is web performance? - Learn web development
ontent to load. how content is rendered to effectively understand web performance, the issues behind it, and the major topic areas we mentioned above, you really should understand some specifics about how browsers work. this includes: how the browser works. when you request a url and hit enter / return, the browser finds out where the server is that holds that website's files, establishes a connection to it, and requests the files. see populating the page: how the browser works for a detailed overview. source order. your html index file's source order can significantly affect performance. the download of additional assets linked to from the index file is generally sequential, based on source order, but this can be manipulated and should definitely be optimized, realizing that some resource...
...ng, deleting, or moving of nodes) can affect performance, so it is worth understanding how to dom works, and how such issues can be mitigated. find out more at document object model. latency. we mention this briefly earlier on, but in brief, latency is the time it takes for your website assets to travel from the server to a user's computer. there is overhead involved in establishing tcp and http connections, and some unavoidable latency in pushing the request and response bytes back and forth across the network, but there are certain ways to reduce latency (e.g. reducing the number of http request you make by downloading less files, using a cdn to make your site more universally performant across thw world, and using http/2 to serve file more efficiently from the server). you can read all about ...

A bird's-eye view of the Mozilla framework
n interface defined in xpidl (cross-platform idl), derived from the corba idl. the xpidl interface description is independent of the programming language used to implement the object itself. for example, a javascript object or c++ class could both implement the same xpidl interface. scripting languages such as javascript cannot directly access xpcom components, but access them indirectly using xpconnect. xpconnect also provides a required layer for xpcom components written in a scripting language. let’s consider a resource description framework (rdf) example, where rdf is a framework for describing and interchangingmetadata, that is, information about information. in this example, we’re interested in the rdf sub-graph underlying thecontents panel widget within thehelp viewer window. suppose...
...the xulelement as a single rdf graph. var tocds = toctree.database; nsirdfcompositedatasource inherits from nsirdfdatasource. help.js declares an nsirdfservice as a compile time constant at the beginning of the file. const rdf = components.classes["@mozilla.org/rdf/rdf-service;1"].getservice(components.interfaces.nsirdfservice); the components object is made available to javascript via xpconnect; it serves as a bridge connecting javascript and xpcom. getlink() uses the nsirdfservice to obtain an nsirdfresource for the requested link. var resource = rdf.getresource(rdfid); nsirdfcompositedatasource inherits from nsirdfdatasource, which supports a gettarget() method for obtaining the nsirdfnode for a given resource and property. var link = tocds.gettarget(resource, nc_link, true); ...

Debugging on Windows
riable moz_no_remote: set moz_no_remote=1 or, starting with firefox 2 and other gecko 1.8.1-based applications, you can use the -no-remote command-line switch instead (implemented in bug 325509). you can also specify the profile to use with the -p profile_name command-line argument. debugging javascript use venkman, the javascript debugger for mozilla. you can use helper functions from nsxpconnect.cpp to inspect and modify the state of javascript code from the msvs debugger. for example, to print curent javascript stack to stdout, evaluate this in quickwatch window: {,,xul}dumpjsstack() note: visual c++ will show you something in the quick watch window, but not the stack, you have to look in the os console for the output. also this magical command only works when the vc++ stack is in...
...t() in the newest stackframe debugging minidumps see debugging a minidump. debugging tinderbox builds see running windows debug builds problems loading debug symbols if both your application and visual c++ hang shortly after launching the application under the debugger, you may be hitting a known deadlock in the way visual studio downloads debug symbols for the system libraries; see https://connect.microsoft.com/visualstudio/feedback/details/422970/hang-loading-rasapi32-pdb-when-using-symbol-server. there are two ways to work around this problem: turn off automatic symbol downloading for system libraries: in tools > options > debugging > symbols, uncheck the microsoft symbol server. pre-load all the windows debug symbols. these instructions apply to visual studio 10 on windows 7; other...

Old Thunderbird build
e basic steps needed to build a thunderbird up to version 59. for thunderbird 60 and later, see the new build instructions. for additional information, see the build documentation. hardware requirements at least 4 gb of ram. 8 gb or more is recommended. while you can build thunderbird on older hardware it can take quite a bit of time to compile on slower machines with less ram. good internet connection for the initial source download. build prerequisites depending on your operating system you will need to carry out a different process to prepare your machine. so firstly complete the instructions for your os and then continue following these build instructions. to build on windows, please read the prerequisites so you don't skip preparing the mapi headers needed to compile thunderbird. ...
...curial code repository: hg clone https://hg.mozilla.org/comm-central then, get all the repositories it depends on. the comm-central repository includes a script to do just that. this may take a while, it's a lot of code! first, cd into the comm-central subdirectory (created automatically by the previous command): cd comm-central then run: python client.py checkout on some types of network connections, "hg clone" might fail because it gets interrupted. it is faster and more efficient to use mercurial bundles instead the first time you fetch the complete repo. in this case, you need a bundle for comm-central, and a bundle for mozilla-central. unbundle mozilla-central into a "mozilla" subdirectory of your comm-central repo after unbundling comm-central. (make sure the unbundled folder's name...

Simple Instantbird build
see the build documentation. this should be kept in sync with simple thunderbird build, you might want to take a look at that page too. build prerequisites hardware requirements: while you can build instantbird on older hardware it can take quite a bit of time to compile on slower machines, and having 8gb of ram is recommended (though you can probably still get away with 4gb). good internet connection for the initial source download. setup: depending on your operating system you will need to carry out a different process to prepare your machine. so firstly complete the instructions for your os and then continue following these build instructions. windows build prerequisites gnu/linux build prerequisites mac os x build prerequisites tip: after completing setup for your os, and befo...
...sitory: hg clone http://hg.mozilla.org/comm-central then, get all the repositories it depends on. the comm-central repository includes a script to do just that. this may take a while, it's a lot of code! first, cd into the comm-central subdirectory (created automatically by the previous command): cd comm-central then run: python client.py checkout note: unless you have a very good network connection, "hg clone" might fail because it gets interrupted. it is faster and more efficient to use mercurial bundles instead the first time you fetch the complete repo. in this case, you need a bundle for comm-central, and a bundle for mozilla-central. unbundle mozilla-central into a "mozilla" subdirectory of your comm-central repo after unbundling comm-central. then run python client.py checkout to e...

mozbrowsererror
cancelable read only boolean whether the event is cancellable or not. details read only object a custom object. detail the detail property returns an anonymous javascript object with the following properties: type a domstring representing the type of error that occurred. ...
...tring representing the type of error that occurred. ...

JavaScript Tips
xul tips when inserting code with an xul overlay, wrap functions and variables inside an object with a unique name to avoid conflicting with existing or future function and variable names. var uniquename = { _privatemember: 3, publicmember: "a string", init: function() { this.dosomething(this.anothermember); }, dosomething: function(aparam) { alert(aparam); } }; xpconnect don't use object methods and properties more than you have to. it is often faster to store the result in a temporary variable. don't call methods that you don't have to. for instance, windowmanager.getenumerator(atype).hasmoreelements() may be replaced with windowmanager.getmostrecentwindow(atype) != null for a single window. don't query interfaces unless you need to access methods and prope...
...rfaces in both cases). don't call queryinterface unless you expect to succeed. instead, use instanceof, e,g,: if (target instanceof components.interfaces.nsirdfresource) return target.value; if (target instanceof components.interfaces.nsirdfliteral) return target.value; return null; don't test the return value of queryinterface, it always returns the original variable if it succeeds. xpconnect knows all about tearoffs and modifies the object that you queryinterface or instanceof to cache all its known interfaces. when passing an object to an xpcom method it is helpful if the object you pass is an xpcom object, so that the c++ method access a c++ object. however, this is not always necessary or desirable. for instance the offline observer declared above is a javascript object that is r...

about:memory
this "explicit" value at the root of the tree represents all the memory allocated via explicit calls to allocation functions. the "window-objects" sub-tree represents all javascript window objects, which includes the browser tabs and ui windows. for example, the "top(http://editio...
...sents heap-allocated memory that is not measured by any memory reporter. this is typically 10--20% of "explicit". if it gets higher, it indicates that additional memory reporters should be added. dmd can be used to determine where these memory reporters should be added. there are measurements for other content such as images and workers, and for browser subsystems such as the startup cache and xpconnect. some add-on memory usage is identified, as the following example shows. ├───40,214,384 b (04.17%) -- add-ons │ ├──21,184,320 b (02.20%) ++ {d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}/js-non-window/zones/zone(0x100496800)/compartment([system principal], jar:file:///users/njn/library/application%20support/firefox/profiles/puna0zr8.new/extensions/%7bd10d0bf8-f5b5-c8b4-a8b2-2b9879e08...

Nonblocking IO In NSPR
on port. i have seen some strange problems with using a nonblocking socket associated with an i/o completion port. so the first constraint is: the blocking/nonblocking io mode of a new socket is committed the first time a potentially-blocking io function is invoked on the socket. once the io mode of a socket is committed, it cannot be changed. the potentially-blocking io functions include <tt>pr_connect()</tt>, <tt>pr_accept()</tt>, <tt>pr_acceptread()</tt>, <tt>pr_read()</tt>, <tt>pr_write()</tt>, <tt>pr_writev()</tt>, <tt>pr_recv()</tt>, <tt>pr_send()</tt>, <tt>pr_recvfrom()</tt>, <tt>pr_sendto()</tt>, and <tt>pr_transmitfile(),</tt> and do not include <tt>pr_bind()</tt> and <tt>pr_listen()</tt>. in blocking mode, any of these potentially-blocking functions requires the use of the nt i/o compl...
... to <tt>pr_fd_set</tt>, i.e., the functions <tt>pr_fd_nset</tt>, <tt>pr_fd_nclr</tt>, <tt>pr_fd_nisset</tt> do not work. pr_available() when <tt>pr_available()</tt> returns 0, it may mean one of two things: there is no data available for reading on that socket. i.e., <tt>pr_recv()</tt> would block (a blocking socket) or fail with <tt>pr_would_block_error</tt> (a nonblocking socket). the tcp connection on that socket has been closed (end of stream). these two cases can be distinguished by <tt>pr_poll()</tt>. if <tt>pr_poll()</tt> reports that the socket is readable (i.e., <tt>pr_poll_read</tt> is set in <tt>out_flags</tt>), and <tt>pr_available()</tt> returns 0, this means that the socket connection is closed. current status implemented across all supported platforms. original document...

Optimizing Applications For NSPR
acintosh' asynchronous i/o capability to perform scheduling during i/o. still, there is no enforceable mechanism to guarantee thread scheduling fairness. calendar time facilities are limited on macintosh. one can only determine the immediate setting of daylight savings time, not what it would be at some arbitrary time in the past or the future. initialization of nspr may fail if the host is not connected to a network of some kind. win-16 http://www.sybase.com/products/languages/watccpl.html the win-16 port is unique in the nspr world in that it uses the watcom development environment. this environment does bring along some of its own special trappings. win16 uses co-operative non-preemptive dispatching for its own processes. this means that when the application using nspr is dispatched, a...
..., and cannot be changed. a file descriptor is not usable after an io operation on it fails with either <tt>pr_io_timeout_error</tt> or <tt>pr_io_interrupt_error</tt>. the only thing you can do is to close the file descriptor. see the faq article for more info. there is no current workaround. you must write your program with this restriction in mind. pr_interrupt is implemented except for <tt>pr_connect()</tt>. irix the irix (classic) implementation has a known race condition in creating new threads. if the spawned thread establishes and exits before the parent thread is resumed, the parent will be left with an invalid pointer to the child. the problem has a solution that will be available soon. digital unix digital unix (aka, osf1) requires the latest patches for the pthreads library. t...

PR_GetPeerName
returns if successful, pr_success. if unsuccessful, pr_failure. ...
... returns if successful, pr_success. if unsuccessful, pr_failure. ...

PR_Listen
listens for connections on a specified socket. syntax #include <prio.h> prstatus pr_listen( prfiledesc *fd, printn backlog); parameters the function has the following parameters: fd a pointer to a prfiledesc object representing a socket that will be used to listen for new connections. backlog the maximum length of the queue of pending connections. returns the function returns one of the following values: upon successful completion of listen request, pr_success. if unsuccessful, pr_failure. further information can be obtained by calling pr_geterror. description pr_listen turns the specified socket into a rendezvous socket. it creates a queue for pending connections and starts to listen for connection requests on the socket. the maximum size of the queue for pending conne...
...listen request, pr_success. if unsuccessful, pr_failure. further information can be obtained by calling pr_geterror. description pr_listen turns the specified socket into a rendezvous socket. it creates a queue for pending connections and starts to listen for connection requests on the socket. the maximum size of the queue for pending connections is specified by the backlog parameter. pending connections may be accepted by calling pr_accept. ...

PR_Recv
the value -1 indicates a failure. ...
... buf a pointer to a buffer to hold the data received. amount the size of buf (in bytes). flags must be zero or pr_msg_peek. timeout a value of type printervaltime specifying the time limit for completion of the receive operation. returns the function returns one of the following values: a positive number indicates the number of bytes actually received. the value 0 means the network connection is closed. the value -1 indicates a failure. the reason for the failure can be obtained by calling pr_geterror. description pr_recv blocks until some positive number of bytes are transferred, a timeout occurs, or an error occurs. no more than amount bytes will be transferred. ...

NSS 3.28.1 release notes
a program linked with older nss 3.x shared libraries will work with nss 3.28.1 shared librar...
...1a:4e:9b:18:de:dc:ea:08:e7:da:aa:07:81:5f:f0 the version number of the updated root ca list has been set to 2.11 a misleading assertion/alert has been removed, when nss tries to flush data to the peer but the connection was already reset. bugs fixed in nss 3.28.1 bug 1296697 - december 2016 batch of root ca changes bug 1322496 - internal error assert when the other side closes connection before reading eoed compatibility nss 3.28.1 shared libraries are backward compatible with all older nss 3.x shared libraries. a program linked with older nss 3.x shared libraries will work with nss 3.28.1 shared libraries without recompiling or relinking. furthermore, applications that restrict their use of nss apis to the functions listed in nss public functions will remain compatible with...

NSS environment variables
[2|r|r]: ssl_renegotiate_requires_xtn (default) only allows renegotiation if the peer's hello bears the tls renegotiation_info extension. this is the safe renegotiation. 3.12.5 modified in 3.12.6 nss_ssl_require_safe_negotiation boolean (1 to enable) it controls whether safe renegotiation indication is required for initial handshake. in other words a connection will be dropped at initial handshake if a server or client do not support safe renegotiation. the default setting for this option is false. 3.12.5 nss_ssl_server_cache_mutex_timeout integer (seconds) timeout time to detect dead or hung process in multi-process ssl server. default is 30 seconds. 3.4 nss_strict_nofork string ("1", "disabled", or a...
... note: ssldebug or ssltrace have to be set to use this functionality. 3.12 sslforcelocks boolean (1 to enable) forces nss to use locks for protection. overrides the effect of ssl_no_locks (see ssl.h). 3.11 sslkeylogfile string (file name) key log file. if set, nss logs rsa pre-master secrets to this file. this allows packet sniffers to decrypt tls connections. see documentation. 3.12.6 ssltrace integer tracing level note: the code must be built with trace defined to use this functionality. before 3.0 build-time environment variables these environment variables affect the build (compilation) of nss. note: this section is a work in progress and is not yet complete. variable type description introd...

Necko Interfaces Overview
creating uri objects from uri strings maps uri scheme to appropriate nsiprotocolhandler impl nsiuri (nsiurl, nsifileurl, nsistandardurl) represents an uri, with getters and setters for various uri parts (eg. scheme, host, path, ...) per protocol implementation necko provides uri impl's for common uri formats (see nsstandardurl, nssimpleuri) nsichannel : nsirequest represents a logical connection to the resource identified by a nsiuri per protocol implementation single use (ie. channel is used to download the resource once) download initiated via nsichannel::asyncopen method can be canceled via nsirequest::cancel method at anytime after invocation of asyncopen method nsiprotocolhandler a service that manages a protocol, identified by it's uri scheme (eg. http) maps uri string ...
...quest channel impl adds itself to its load group during invocation of asyncopen channel impl removes itself from its load group when download completes load groups in gecko own all channels used to load a particular page (until the channels complete) all channels owned by a load group can be canceled at once via the load group's nsirequest::cancel method nsitransport represents a physical connection, such as a file descriptor or a socket used directly by protocol handler implementations (as well as by mailnews and chatzilla) synchronous i/o methods: openinputstream, openoutputstream asynchronous i/o methods: asyncread, asyncwrite nsitransport::asyncread takes a nsistreamlistener parameter original document information author(s): darin fisher last updated date: december 10, 200...

SpiderMonkey compartments
at all times what objects from a compartment are kept alive by outside references (through cross-compartment wrappers). this allows the garbage collecting of individual compartments, in addition to global collection. spidermonkey simply assumes that all objects referenced from outside the compartment are live, and then walks the object graph inside the compartment. objects that are found to be disconnected from the graph are discarded. with this new per-compartment garbage collection we shortcut having to walk unrelated heap areas of a window or tab that triggered a garbage collection. ​see also js_newcompartmentandglobalobject() js_entercrosscompartmentcall() js_leavecrosscompartmentcall() jsautocompartment invariants spidermonkey internals: thread safety andreas gal blog po...
...bage collection we shortcut having to walk unrelated heap areas of a window or tab that triggered a garbage collection. ​see also js_newcompartmentandglobalobject() js_entercrosscompartmentcall() js_leavecrosscompartmentcall() jsautocompartment invariants spidermonkey internals: thread safety andreas gal blog post bobby holley blog post sfink/contexts_and_compartments xpconnect security membranes ...

GCIntegration - SpiderMonkey Redirect 1
the first slice of the gc. therefore, it's not possible for code to modify them between when the initial snapshot is taken and when the pointer is marked, so no write barrier is needed. many pointers in gecko are traced via ns_decl_cycle_collection_script_holder_class and its related macros. these pointers are always traced in the first slice, and so they don't need a write barrier. many other xpconnect pointers are also traced in this way. see xpcjsruntime::traceblackjs and xpcjsruntime::tracegrayjs. if a pointer doesn't fit one of these categories, then it probably requires a write barrier. before the pointer is modified (except initializing writes, which don't need a barrier), you should call incrementalreferencebarrier() or incrementalvaluebarrier(), passing it the value the pointer held b...
...lackjs and xpcjsruntime::tracegrayjs. if a pointer doesn't fit one of these categories, then it probably requires a write barrier. before the pointer is modified (except initializing writes, which don't need a barrier), you should call incrementalreferencebarrier() or incrementalvaluebarrier(), passing it the value the pointer held before the write. there are several examples of this usage in xpconnect. the js::objectptr class is intended to serve as a drop-in replacement for jsobject *. it has an assignment operator that automatically invokes a write barrier. so far, though, there hasn't been much use for this class—there aren't many places outside of spidermonkey where a write barrier is required. read barriers "weak pointers" are a major complication to the scheme described above. for t...

Redis Tips
n't made from whale meat but that are also very unlike ice cream -- it just gives the whaling industry a way to lump together people who don't use their products. so rather than thinking about redis as a database with some kind of non-existent relationship to sql, think of it as a data structure server with a rich set of commands for querying and manipulating those data structures over a network connection. redis data types include: strings hashes lists sets ordered sets (called zsets in redis) transactions publishers and subscribers this table lists some common programming tasks and data structures, and suggests some redis functions or data structures for them: dictionary lookup set, get, setnx, etc. counters set, incr, incrby list manipulation l...
...ntially as a single atomic operation. here's a stupid node script to show how this works: #!/usr/bin/env node var r = require('redis').createclient(); r.multi() .set("foo", 42) .set("bar", "ice cream") .set("baz", 6.28) .get("foo") .get("bar") .get("baz") .exec(function(err, resultlist) { console.log(json.stringify(resultlist, null, 2)); r.end(); // terminate the redis connection; node can quit }); when run, this prints: [ "ok", "ok", "ok", "42", "ice cream", "6.28" ] the result list includes one value per each command executed. awesome. note that if one of your commands crashes, the others still all execute! (try this by breaking one of the set statements by leaving out the value argument.) you'll get one return value for each operation that did...

Pinning violation reports
the error page displayed by firefox when you encounter a pin violation gives you the option of reporting this error. ...
... the error page displayed by firefox when you encounter a pin violation gives you the option of reporting this error. doing this can help us to make the web safer. ...

Places Developer Guide
pen = false; querying history for redirects and from_visit results of type result_type_full_visit have information about the visit, such as the referring visit, and how the transition happened (typed, redirect, link, etc). the problem is that it is not yet implemented -- see bug 320831. so the only solution for now seems to do one own sql queries to the places database. ...
...redirect, link, etc). the problem is that it is not yet implemented -- see bug 320831. so the only solution for now seems to do one own sql queries to the places database. here is how one can get a connection to the places database: function getplacesdbconn() { return components.classes['@mozilla.org/browser/nav-history-service;1']. ...

Components.Constructor
t is the contract id of the xpcom component to create. the component is then returned immediately, with only the base interface nsisupports available on it; you must call nsisupports.queryinterface() on it to call methods on the object. ...
...the arguments used with the initialization method are the arguments passed to the components.constructor()-c...

Using components
commonly, we start our scripts like so: var cc = components.classes; var ci = components.interfaces; if we want to get a hold of a component, we then do something like: var rc = cc["@mozilla.org/registry;1"]; var rs = rc.getservice(ci.nsiregistry); see also: xpcshell -- how to get a command line interface to javascript more info as was already stated, it is common to start addon scripts like: var cc = components.classes; var ci = components.interfaces; there is also another way to start, which is exactly equivalent to the above. var {cc: classes, ci: interfaces} = components; there are many more than just classes and interfaces. ...
...ect nsxpccomponents_classes] results=[object nsxpccomponents_results] issuccesscode=function issuccesscode() { [native code] } constructor=[object nsxpccomponents_constructor] queryinterface=function queryinterface() { [native code] } interfacesbyid=[object nsxpccomponents_interfacesbyid] classesbyid=[object nsxpccomponents_classesbyid] stack=js frame :: scratchpad/4 :: cdump :: line 8 manager=[xpconnect wrapped nsicomponentmanager] id=[object nsxpccomponents_id] exception=[object nsxpccomponents_exception] reporterror=function reporterror() { [native code] } cancreatewrapper=function cancreatewrapper() { [native code] } cancallmethod=function cancallmethod() { [native code] } cangetproperty=function cangetproperty() { [native code] } cansetproperty=function cansetproperty() { [native code] } ...

HOWTO
async network requests problem you want to make network requests or do other asynchronous work in xpcshell. however, when you start your script, it exits immediately, before the network request returns. solution 1. put the following at the end of your script: // do async processing // from <https://developer.mozilla.org/en/xpconnect/xpcshell/howto> print("doing async work"); gscriptdone = false; var gthreadmanager = cc["@mozilla.org/thread-manager;1"] .getservice(ci.nsithreadmanager); var mainthread = gthreadmanager.currentthread; while (!gscriptdone) mainthread.processnextevent(true); while (mainthread.haspendingevents()) mainthread.processnextevent(true); 2. in all callbacks where your script is finished, i.e. both success and error callbacks, put: gscriptdone = true; if you f...
... solution 1 var loader = components.classes["@mozilla.org/moz/jssubscript-loader;1"] .getservice(components.interfaces.mozijssubscriptloader); loader.loadsubscript("chrome://myall/content/file.jsm"); see: http://mxr.mozilla.org/comm-central/...figutils.js#54 solution 2 append the following at the top of your js file which you want to run in xpcshell { // <https://developer.mozilla.org/en/xpconnect/xpcshell/howto> // <https://bugzilla.mozilla.org/show_bug.cgi?id=546628> let cc = components.classes; let ci = components.interfaces; // register resource://app/ uri let ios = cc["@mozilla.org/network/io-service;1"] .getservice(ci.nsiioservice); let reshandler = ios.getprotocolhandler("resource") .queryinterface(ci.nsiresprotocolhandler); let mozdir = cc["@mozilla.org/fil...

xpcshell
it is a console application that lets you run javascript code. unlike the ordinary js shell (js), xpcshell lets the scripts running in it access xpcom functionality. prerequisites you need your own build of mozilla to use xpcshell. running xpcshell ./run-mozilla.sh ./xpcshell xpcshell is almost always in the same directory as run-mozilla.sh. $ locate run-mozilla.sh /usr/lib/firefox-0.10.1/run-mozilla.sh /usr/lib/thunderbird-0.9/run-mozilla.sh /usr/local/mozilla/run-mozilla.sh /opt/mozilla/run-mozilla.sh /root/.trash/mozilla/run-mozilla.sh just pick one, cd over there, and run-mozilla.sh xpcshell, if it's present. ...
...fy this, run xpcshell with the -v 180 command-line option, which tells xpcshell to use javascript 1.8. example you can input javascript, straight to mozilla. js> 5+7 12 js> print("hello, world!") hello, world! js> see also howto for common problems in writing xpcshell scripts, e.g., doing async network calls or using js modules. pretty much all mozilla programs use xpcom components via xpconnect. read xpconnect:using components to get started with that. see the xpcshell reference for information on command line arguments and extension functions. learn how to write xpcshell-based unit tests. read xpcshell:profiling for information on how to profile scripts. ...

nsIFile
pecific path string or by using cross-platform locations retrieved from the directory service. all methods with string parameters have two forms. the preferred form operates on utf-16 encoded characters strings. an alternate form operates on characters strings encoded in the "native" charset. a string containing characters encoded in the native charset cannot be safely passed to javascript via xpconnect. therefore, the utf-16 forms are scriptable, but the "native methods" are not. in addition, the native form cannot deal with files whose name contains characters outside the default system code page on windows. using the native form limits the ability of your code to deal with the full unicode support on windows 2000 or later where the os itself does not have such a limitation. therefore, you mus...
...onment variables (with the precedence the same as the order they're enumerated). on win32 platforms, it is the currently selected ansi codepage (specified by cp_acp). the word "native" appears in the name of methods that operate on or return strings encoded in the native character set. a string containing characters encoded in the native character set cannot be safely passed to javascript via xpconnect. therefore, the "native" methods and attributes are not scriptable. xpcom provides the string conversion functions ns_cstringtoutf16 and ns_utf16tocstring, which can be used to convert a string between utf-16 and the native character encoding. this interface was frozen for gecko 1.0. see bug 129279 for details. from gecko 2.0 interfaces are no longer frozen. see also nsilocalfile ns_cstrin...

nsIMsgIncomingServer
nsimsgincomingserver mailnews/base/public/nsimsgincomingserver.idlscriptable ??? add brief description of interface ??? ...
...thrown missing exception missing description cleartemporaryreturnreceiptsfilter() if sent folder pref is changed we need to clear the temporary return receipt filter so that the new return receipt filter can be recreated (by configuretemporaryreturnreceiptsfilter()). void cleartemporaryreturnreceiptsfilter(); parameters none. exceptions thrown missing exception missing description closecachedconnections() void closecachedconnections(); parameters none. exceptions thrown missing exception missing description configuretemporaryfilters() for mail, this configures both the mdn filter, and the server-side spam filter filters, if needed. if we have set up to filter return receipts into our sent folder, this utility method creates a filter to do that, and adds it to our filterlist if it doesn't ...

nsIPropertyBag
lways accessible so the window.navigator cannot be accessed. ...
...le so the window.navigator cannot be accessed. ...

nsISSLErrorListener
security/manager/ssl/public/nsisslerrorlistener.idlscriptable a mechanism to report a broken ssl connection. 1.0 66 introduced gecko 1.9 inherits from: nsisupports last changed in gecko 1.9 (firefox 3) note: the recipient of this ssl status notification should not block. method overview boolean notifysslerror(in nsiinterfacerequestor socketinfo, in print32 error, in autf8string targetsite); methods notifysslerror() called in case of an ssl error. boolean notifysslerror( in nsiinterfacerequestor socketinfo, in print32 error, in autf8string targetsite ); parameters socketinfo a network communication context that can be used to obtain more information about the active connection. error the code associated with the error. the ssl status object that desc...
...r. boolean notifysslerror( in nsiinterfacerequestor socketinfo, in print32 error, in autf8string targetsite ); parameters socketinfo a network communication context that can be used to obtain more information about the active connection. error the code associated with the error. the ssl status object that describes the problem(s). targetsite the site name that was used to open the current connection. return value the consumer shall return true if it wants to suppress the error message related to the error (the connection will still get canceled). see also nsisockettransport ...