413 Payload Too Large - HTTP
the http 413 payload too large response status code indicates that the request entity is larger than limits defined by server; the server might close the connection or return a retry-after header field.
... status 413 payload too large specifications specification title rfc 7231, section 6.5.11: 413 payload too large hypertext transfer protocol (http/1.1): semantics and content ...

Writing WebSocket servers - Web APIs
format each data frame (from the client to the server or vice-versa) follows this same format: frame format: ​​ 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-------+-+-------------+-------------------------------+ |f|r|r|r| opcode|m| payload len | extended payload length | |i|s|s|s| (4) |a| (7) | (16/64) | |n|v|v|v| |s| | (if payload len==126/127) | | |1|2|3| |k| | | +-+-+-+-+-------+-+-------------+ - - - - - - - - - - - - - - - + | extended payload length continued, if payload len == 127 | +...
... - - - - - - - - - - - - - - - +-------------------------------+ | |masking-key, if mask set to 1 | +-------------------------------+-------------------------------+ | masking-key (continued) | payload data | +-------------------------------- - - - - - - - - - - - - - - - + : payload data continued ...
... : + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - + | payload data continued ...
...And 11 more matches

Web Video Text Tracks Format (WebVTT) - Web APIs
it is important to not use "extra" blank lines within a cue, for example between the timings line and the cue payload.
... webvtt cues a cue is a single subtitle block that has a single start time, end time, and textual payload.
... the cue payload text.
...And 9 more matches

Communicating using "port" - Archive of obsolete content
thus, to emit a message from a content script: self.port.emit("mycontentscriptmessage", mycontentscriptmessagepayload); to receive a message from the add-on code: self.port.on("myaddonmessage", function(myaddonmessagepayload) { // handle the message }); compare this to the technique used to receive built-in messages in the content script.
... it may be called with any number of parameters, but is most likely to be called with a name for the message and an optional payload.
... the payload can be any value that is serializable to json.
...And 6 more matches

Codecs used by WebRTC - Web media technologies
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.
...this is useful to note, since in rfc 6184 ("rtp payload format for h.264 video"), profile-level-id is entirely optional.
... other notes the payload format used for avc in webrtc is described in rfc 6184: rtp payload format for h.264 video.
...And 6 more matches

port - Archive of obsolete content
it may be called with any number of parameters, but is most likely to be called with a name for the message and an optional payload.
... the payload can be any value that is serializable to json.
... from the content script to the main add-on code: // content-script.js var mymessagepayload = "some data"; self.port.emit("mymessage", mymessagepayload); from the main add-on code to the content script: // main.js var mymessagepayload = "some data"; worker.port.emit("mymessage", mymessagepayload); on() the port.on() function registers a function as a listener for a particular message sent from the other side using port.emit().
...And 5 more matches

Index - Web APIs
1300 fetch basic concepts api, fetch, fetch api, xmlhttprequest, concepts, guard, request at the heart of fetch are the interface abstractions of http requests, responses, headers, and body payloads, along with a global fetch method for initiating asynchronous resource requests.
...if the resource is retrieved from an application cache or local resources, it returns the size of the payload after removing any applied content-codings.
... 3035 performanceresourcetiming.encodedbodysize api, property, reference, web performance the encodedbodysize read-only property represents the size (in octets) received from the fetch (http or cache), of the payload body, before removing any applied content-codings.
...And 4 more matches

How to make PWAs re-engageable using Notifications and Push - Progressive web apps (PWAs)
it is all explained in the service worker cookbook — see the push payload demo.
... fetch('./register', { method: 'post', headers: { 'content-type': 'application/json' }, body: json.stringify({ subscription: subscription }), }); then the globaleventhandlers.onclick function on the subscribe button is defined: document.getelementbyid('doit').onclick = function() { const payload = document.getelementbyid('notification-payload').value; const delay = document.getelementbyid('notification-delay').value; const ttl = document.getelementbyid('notification-ttl').value; fetch('./sendnotification', { method: 'post', headers: { 'content-type': 'application/json' }, body: json.stringify({ subscription: subscriptio...
...n, payload: payload, delay: delay, ttl: ttl, }), }); }; when the button is clicked, fetch asks the server to send the notification with the given parameters: payload is the text that to be shown in the notification, delay defines a delay in seconds until the notification will be shown, and ttl is the time-to-live setting that keeps the notification available on the server for a specified amount of time, also defined in seconds.
...And 4 more matches

Using DTMF with WebRTC - Web APIs
instead, they're sent out-of-band, as rtp payloads.
...webrtc currently ignores these payloads; this is because webrtc's dtmf support is primarily intended for use with legacy telephone services that rely on dtmf tones to perform tasks such as: 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.
...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.
...And 2 more matches

HTTP Index - HTTP
189 transfer-encoding http, reference, header the transfer-encoding header specifies the form of encoding used to safely transfer the payload body to the user.
... 214 put http, http method, reference, request method the http put request method creates a new resource or replaces a representation of the target resource with the request payload.
... 224 203 non-authoritative information http, http status code, reference, status code, successful response the http 203 non-authoritative information response status indicates that the request was successful but the enclosed payload has been modified by a transforming proxy from that of the origin server's 200 (ok) response .
...And 2 more matches

Communicating With Other Scripts - Archive of obsolete content
", true, true, greeting); document.documentelement.dispatchevent(event); } finally, the page script "page-script.js" listens for the message and logs the greeting to the web console: window.addeventlistener("addon-message", function(event) { console.log(event.detail.greeting); }, false); after firefox 30: clone the message object this technique depends on being able to share the message payload between the content script scope and the page script scope.
... from firefox 30 this sharing requires an extra step: the content script needs to explicitly clone the message payload into the page script's scope using the global cloneinto() function: var messenger = document.getelementbyid("message"); messenger.addeventlistener("click", sendcustomevent, false); function sendcustomevent() { var greeting = {"greeting" : "hello world"}; var cloned = cloneinto(greeting, document.defaultview); var event = document.createevent('customevent'); event.initcustomevent("addon-message", true, true, cloned); document.documentelement.dispatchevent(event); } messaging from page script to content script sending messages using custom dom events from the page script to the content script is just the same, but in reverse.
... this example, "main.js" creates a page-mod to target the page we are interested in: var data = require("sdk/self").data; var pagemod = require("sdk/page-mod"); pagemod.pagemod({ include: "http://my-domain.org/talk.html", contentscriptfile: data.url("listen.js") }); the web page "talk.html" creates and dispatches a custom dom event, using initcustomevent()'s detail parameter to supply the payload: <!doctype html> <html> <head></head> <body> <script> function sendmessage() { var event = document.createevent('customevent'); event.initcustomevent("addon-message", true, true, { hello: 'world' }); document.documentelement.dispatchevent(event); } </script> <button onclick="sendmessage()">send message</button> </body> </html> finally, the c...
...ontent script "listen.js" listens for the new event and retrieves the payload from its detail attribute: window.addeventlistener("addon-message", function(event) { console.log(json.stringify(event.detail)); }, false); ...

Interacting with page scripts - Archive of obsolete content
rue, detail: greeting }); document.documentelement.dispatchevent(event); } finally, the page script "page-script.js" listens for the message and logs the greeting to the web console: window.addeventlistener("addon-message", function(event) { console.log(event.detail.greeting); }, false); after firefox 30: clone the message object this technique depends on being able to share the message payload between the content script scope and the page script scope.
... from firefox 30 this sharing requires an extra step: the content script needs to explicitly clone the message payload into the page script's scope using the global cloneinto() function: var messenger = document.getelementbyid("message"); messenger.addeventlistener("click", sendcustomevent, false); function sendcustomevent() { var greeting = {"greeting" : "hello world"}; var cloned = cloneinto(greeting, document.defaultview); var event = new customevent("addon-message", { bubbles: true, detail: cloned }); document.documentelement.dispatchevent(event); } page script to content script sending messages using custom dom events from the page script to the content script is just the same, but in reverse.
... this example, "main.js" creates a page-mod to target the page we are interested in: var data = require("sdk/self").data; var pagemod = require("sdk/page-mod"); pagemod.pagemod({ include: "http://my-domain.org/talk.html", contentscriptfile: data.url("listen.js") }); the web page "talk.html" creates and dispatches a custom dom event, using initcustomevent()'s detail parameter to supply the payload: <!doctype html> <html> <head></head> <body> <script> function sendmessage() { var event = document.createevent('customevent'); event.initcustomevent("addon-message", true, true, { hello: 'world' }); document.documentelement.dispatchevent(event); } </script> <button onclick="sendmessage()">send message</button> </body> </html> finally, the c...
...ontent script "listen.js" listens for the new event and retrieves the payload from its detail attribute: window.addeventlistener("addon-message", function(event) { console.log(json.stringify(event.detail)); }, false); ...

panel - Archive of obsolete content
the message payload is the text the user // entered.
...// the message payload is the contents of the edit box.
...the message payload is the text the user // entered.
...// the message payload is the contents of the edit box.

Writing a WebSocket server in C# - Web APIs
full list of opcodes the second byte, which currently has a value of 131, is another bitfield that breaks down as such: mask (bit 0) payload length (bit 1:7) 1 0x83=0000011 mask bit: defines whether the "payload data" is masked.
... if set to 1, a masking key is present in masking-key, and this is used to unmask the "payload data".
... payload length: if this value is between 0 and 125, then it is the length of message.
... the remaining bytes are the encoded message payload.

Communicating using "postMessage" - Archive of obsolete content
handling message events in the content script to send a message from a content script, you use the postmessage function of the global self object: self.postmessage(contentscriptmessage); this takes a single parameter, the message payload, which may be any json-serializable value.
...the handler function is passed the message payload.
...now we have to embed the event type in the message payload, and implement a switch function in the receiver to dispatch the message: var pagemodscript = "window.addeventlistener('mouseover', function(event) {" + " self.postmessage({" + " kind: 'mouseover'," + " element: event.target.tostring()" + " });" + "}, false);" + "window...