Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/curl/docs/libcurl/opts/CURLOPT_HTTPHEADER.3 @ 40:aa33339d6b8a upstream

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ADD: MuPDF v1.26.10: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.5.
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 11:31:38 +0200
parents b50eed0cc0ef
children
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1 .\" **************************************************************************
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2 .\" * _ _ ____ _
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3 .\" * Project ___| | | | _ \| |
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4 .\" * / __| | | | |_) | |
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5 .\" * | (__| |_| | _ <| |___
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6 .\" * \___|\___/|_| \_\_____|
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7 .\" *
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8 .\" * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
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9 .\" *
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10 .\" * This software is licensed as described in the file COPYING, which
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11 .\" * you should have received as part of this distribution. The terms
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12 .\" * are also available at https://curl.haxx.se/docs/copyright.html.
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13 .\" *
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14 .\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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15 .\" * copies of the Software, and permit persons to whom the Software is
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16 .\" * furnished to do so, under the terms of the COPYING file.
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17 .\" *
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18 .\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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19 .\" * KIND, either express or implied.
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20 .\" *
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21 .\" **************************************************************************
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22 .\"
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23 .TH CURLOPT_HTTPHEADER 3 "17 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
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24 .SH NAME
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25 CURLOPT_HTTPHEADER \- set custom HTTP headers
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26 .SH SYNOPSIS
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27 #include <curl/curl.h>
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28
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29 CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HTTPHEADER, struct curl_slist *headers);
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30 .SH DESCRIPTION
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31 Pass a pointer to a linked list of HTTP headers to pass to the server and/or
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32 proxy in your HTTP request. The same list can be used for both host and proxy
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33 requests!
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34
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35 The linked list should be a fully valid list of \fBstruct curl_slist\fP
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36 structs properly filled in. Use \fIcurl_slist_append(3)\fP to create the list
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37 and \fIcurl_slist_free_all(3)\fP to clean up an entire list. If you add a
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38 header that is otherwise generated and used by libcurl internally, your added
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39 one will be used instead. If you add a header with no content as in 'Accept:'
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40 (no data on the right side of the colon), the internally used header will get
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41 disabled. With this option you can add new headers, replace internal headers
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42 and remove internal headers. To add a header with no content (nothing to the
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43 right side of the colon), use the form 'MyHeader;' (note the ending
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44 semicolon).
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45
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46 The headers included in the linked list \fBmust not\fP be CRLF-terminated,
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47 because libcurl adds CRLF after each header item. Failure to comply with this
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48 will result in strange bugs because the server will most likely ignore part of
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49 the headers you specified.
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50
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51 The first line in a request (containing the method, usually a GET or POST) is
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52 not a header and cannot be replaced using this option. Only the lines
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53 following the request-line are headers. Adding this method line in this list
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54 of headers will only cause your request to send an invalid header. Use
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55 \fICURLOPT_CUSTOMREQUEST(3)\fP to change the method.
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56
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57 When this option is passed to \fIcurl_easy_setopt(3)\fP, libcurl will not copy
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58 the entire list so you \fBmust\fP keep it around until you no longer use this
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59 \fIhandle\fP for a transfer before you call \fIcurl_slist_free_all(3)\fP on
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60 the list.
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61
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62 Pass a NULL to this option to reset back to no custom headers.
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63
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64 The most commonly replaced headers have "shortcuts" in the options
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65 \fICURLOPT_COOKIE(3)\fP, \fICURLOPT_USERAGENT(3)\fP and
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66 \fICURLOPT_REFERER(3)\fP. We recommend using those.
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67
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68 There's an alternative option that sets or replaces headers only for requests
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69 that are sent with CONNECT to a proxy: \fICURLOPT_PROXYHEADER(3)\fP. Use
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70 \fICURLOPT_HEADEROPT(3)\fP to control the behavior.
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71 .SH SECURITY CONCERNS
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72 By default, this option makes libcurl send the given headers in all HTTP
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73 requests done by this handle. You should therefore use this option with
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74 caution if you for example connect to the remote site using a proxy and a
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75 CONNECT request, you should to consider if that proxy is supposed to also get
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76 the headers. They may be private or otherwise sensitive to leak.
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77
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78 Use \fICURLOPT_HEADEROPT(3)\fP to make the headers only get sent to where you
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79 intend them to get sent.
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80
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81 Custom headers are sent in all requests done by the easy handles, which
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82 implies that if you tell libcurl to follow redirects
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83 (\fICURLOPT_FOLLOWLOCATION(3)\fP), the same set of custom headers will be sent
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84 in the subsequent request. Redirects can of course go to other hosts and thus
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85 those servers will get all the contents of your custom headers too.
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86
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87 Starting in 7.58.0, libcurl will specifically prevent "Authorization:" headers
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88 from being sent to other hosts than the first used one, unless specifically
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89 permitted with the \fICURLOPT_UNRESTRICTED_AUTH(3)\fP option.
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90
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91 Starting in 7.64.0, libcurl will specifically prevent "Cookie:" headers
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92 from being sent to other hosts than the first used one, unless specifically
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93 permitted with the \fICURLOPT_UNRESTRICTED_AUTH(3)\fP option.
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94 .SH DEFAULT
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95 NULL
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96 .SH PROTOCOLS
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97 HTTP
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98 .SH EXAMPLE
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99 .nf
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100 CURL *curl = curl_easy_init();
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101
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102 struct curl_slist *list = NULL;
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103
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104 if(curl) {
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105 curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
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106
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107 list = curl_slist_append(list, "Shoesize: 10");
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108 list = curl_slist_append(list, "Accept:");
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109
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110 curl_easy_setopt(curl, CURLOPT_HTTPHEADER, list);
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111
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112 curl_easy_perform(curl);
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113
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114 curl_slist_free_all(list); /* free the list again */
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115 }
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116 .fi
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117
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118 .SH AVAILABILITY
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119 As long as HTTP is enabled
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120 .SH RETURN VALUE
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121 Returns CURLE_OK if HTTP is supported, and CURLE_UNKNOWN_OPTION if not.
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122 .SH "SEE ALSO"
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123 .BR CURLOPT_CUSTOMREQUEST "(3), " CURLOPT_HEADEROPT "(3), "
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124 .BR CURLOPT_PROXYHEADER "(3), " CURLOPT_HEADER "(3)"