TE - HTTP
in http/2 - the te header field is only accepted if the trailers value is set.
...however, it is useful for setting if the client is accepting trailer fields in a chunked transfer coding using the "trailers" value.
... header type request header forbidden header name yes syntax te: compress te: deflate te: gzip te: trailers // multiple directives, weighted with the quality value syntax: te: trailers, deflate;q=0.5 directives compress a format using the lempel-ziv-welch (lzw) algorithm is accepted as a transfer coding name.
... trailers indicates that the client is willing to accept trailer fields in a chunked transfer coding.

Encrypt Decrypt MAC Keys As Session Objects
y(trailer, mac_trailer); break; case pad: strcpy(header, pad_header); strcpy(trailer, pad_trailer); break; } rv = filetoitem(&filedata, file); nonbody = (char *)filedata.data; if (!nonbody) { pr_fprintf(pr_stderr, "unable to read data from input file\n"); rv = secfailure; goto cleanup; } /* check for headers and trailers and remove them */ if ((body = strstr(nonbody, header)) != null) { char *trail = null; nonbody = body; body = port_strchr(body, '\n'); if (!body) body = port_strchr(nonbody, '\r'); /* maybe this is a mac file */ if (body) trail = strstr(++body, trailer); if (trail != null) { *trail = '\0'; } else { ...

Encrypt and decrypt MAC using token
y(trailer, mac_trailer); break; case pad: strcpy(header, pad_header); strcpy(trailer, pad_trailer); break; } rv = filetoitem(&filedata, file); nonbody = (char *)filedata.data; if (!nonbody) { pr_fprintf(pr_stderr, "unable to read data from input file\n"); rv = secfailure; goto cleanup; } /* check for headers and trailers and remove them */ if ((body = strstr(nonbody, header)) != null) { char *trail = null; nonbody = body; body = port_strchr(body, '\n'); if (!body) body = port_strchr(nonbody, '\r'); /* maybe this is a mac file */ if (body) trail = strstr(++body, trailer); if (trail != null) { *trail = '\0'; } else { ...

Enc Dec MAC Output Public Key as CSR
ab: header = lab_header; trailer = lab_trailer; break; default: pr_close(file); return secfailure; } rv = filetoitem(&filedata, file); nonbody = (char *)filedata.data; if (!nonbody) { pr_fprintf(pr_stderr, "unable to read data from input file\n"); rv = secfailure; goto cleanup; } /* check for headers and trailers and remove them */ char *trail = null; if ((body = strstr(nonbody, header)) != null) { char *trail = null; nonbody = body; body = port_strchr(body, '\n'); if (!body) body = port_strchr(nonbody, '\r'); /* maybe this is a mac file */ if (body) trail = strstr(++body, trailer); if (trail != null) { *trail = '\...

Enc Dec MAC Using Key Wrap CertReq PKCS10 CSR
der = ns_sig_header; trailer = ns_sig_trailer; break; default: rv = secfailure; goto cleanup; } rv = filetoitem(&filedata, file); nonbody = (char *)filedata.data; if (!nonbody) { pr_fprintf(pr_stderr, "unable to read data from input file\n"); rv = secfailure; goto cleanup; } /* check for headers and trailers and remove them */ if ((body = strstr(nonbody, header)) != null) { char *trail = null; nonbody = body; body = port_strchr(body, '\n'); if (!body) body = port_strchr(nonbody, '\r'); /* maybe this is a mac file */ if (body) trail = strstr(++body, trailer); if (trail != null) { *trail = '\0'; }...

Encrypt Decrypt_MAC_Using Token
y(trailer, mac_trailer); break; case pad: strcpy(header, pad_header); strcpy(trailer, pad_trailer); break; } rv = filetoitem(&filedata, file); nonbody = (char *)filedata.data; if (!nonbody) { pr_fprintf(pr_stderr, "unable to read data from input file\n"); rv = secfailure; goto cleanup; } /* check for headers and trailers and remove them.

NSS Sample Code Sample_3_Basic Encryption and MACing
y(trailer, mac_trailer); break; case pad: strcpy(header, pad_header); strcpy(trailer, pad_trailer); break; } rv = filetoitem(&filedata, file); nonbody = (char *)filedata.data; if (!nonbody) { pr_fprintf(pr_stderr, "unable to read data from input file\n"); rv = secfailure; goto cleanup; } /* check for headers and trailers and remove them */ if ((body = strstr(nonbody, header)) != null) { char *trail = null; nonbody = body; body = port_strchr(body, '\n'); if (!body) body = port_strchr(nonbody, '\r'); /* maybe this is a mac file */ if (body) trail = strstr(++body, trailer); if (trail != null) { *trail = '\0'; } else { ...

NSS Sample Code Utilities_1
/* first convert ascii to binary */ secitem filedata; char *asc, *body; /* read in ascii data */ rv = filetoitem(&filedata, infile); asc = (char *)filedata.data; if (!asc) { pr_fprintf(pr_stderr, "unable to read data from input file\n"); rv = secfailure; goto cleanup; } /* check for headers and trailers and remove them */ if ((body = strstr(asc, "-----begin")) != null) { char *trailer = null; asc = body; body = port_strchr(body, '\n'); if (!body) body = port_strchr(asc, '\r'); /* maybe this is a mac file */ if (body) trailer = strstr(++body, "-----end"); if (trailer != null) { ...

EncDecMAC using token object - sample 3
ader); strcpy(trailer, iv_trailer); break; case mac: strcpy(header, mac_header); strcpy(trailer, mac_trailer); break; case pad: strcpy(header, pad_header); strcpy(trailer, pad_trailer); break; } rv = filetoitem(&filedata, file); nonbody = (char *)filedata.data; if (!nonbody) { pr_fprintf(pr_stderr, "unable to read data from input file\n"); rv = secfailure; goto cleanup; } /* check for headers and trailers and remove them */ if ((body = strstr(nonbody, header)) != null) { char *trail = null; nonbody = body; body = port_strchr(body, '\n'); if (!body) body = port_strchr(nonbody, '\r'); /* maybe this is a mac file */ if (body) trail = strstr(++body, trailer); if (trail != null) { *trail = '\0'; } else { pr_fprintf(pr_stderr, "input has header but no trailer\n"); port_free(filedata.data); return secfai...

Utilities for nss samples
/* first convert ascii to binary */ secitem filedata; char *asc, *body; /* read in ascii data */ rv = filetoitem(&filedata, infile); asc = (char *)filedata.data; if (!asc) { pr_fprintf(pr_stderr, "unable to read data from input file\n"); rv = secfailure; goto cleanup; } /* check for headers and trailers and remove them */ if ((body = strstr(asc, "-----begin")) != null) { char *trailer = null; asc = body; body = port_strchr(body, '\n'); if (!body) body = port_strchr(asc, '\r'); /* maybe this is a mac file */ if (body) trailer = strstr(++body, "-----end"); if (trailer != null) { ...

sample2
eak; case certvfy: header = ns_cert_vfy_header; trailer = ns_cert_vfy_trailer; break; case sig: header = ns_sig_header; trailer = ns_sig_trailer; break; default: rv = secfailure; goto cleanup; } rv = filetoitem(&filedata, file); nonbody = (char *)filedata.data; if (!nonbody) { pr_fprintf(pr_stderr, "unable to read data from input file\n"); rv = secfailure; goto cleanup; } /* check for headers and trailers and remove them */ if ((body = strstr(nonbody, header)) != null) { char *trail = null; nonbody = body; body = port_strchr(body, '\n'); if (!body) body = port_strchr(nonbody, '\r'); /* maybe this is a mac file */ if (body) trail = strstr(++body, trailer); if (trail != null) { *trail = '\0'; } else { pr_fprintf(pr_stderr, "input has header but no trailer\n"); port_free(filedata.data); rv = secfailu...

Network request details - Firefox Developer Tools
t-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", "value": "https://www.wikipedia.org/" }, { "name": "te", "value": "trailers" }, { "name": "user-agent", "value": "mozilla/5.0 (windows nt 10.0; win64; x64; rv:68.0) gecko/20100101 firefox/68.0" } ] } } request headers the request headers section shows details about the request headers.

Response - Web APIs
response.trailers a promise resolving to a headers object, associated with the response with response.headers for values of the http trailer header.

Trailer - HTTP
the te request header needs to be set to "trailers" to allow trailer fields.