Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/curl/docs/libcurl/opts/CURLOPT_ALTSVC_CTRL.3 @ 17:dd9cdb856310

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Remove PKG-INFO from the because it is regenerated automatically for the sdist
author Franz Glasner <fzglas.hg@dom66.de>
date Thu, 18 Sep 2025 17:40:40 +0200
parents b50eed0cc0ef
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 - 2019, 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_ALTSVC_CTRL 3 "5 Feb 2019" "libcurl 7.64.1" "curl_easy_setopt options"
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24 .SH NAME
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25 CURLOPT_ALTSVC_CTRL \- control alt-svc behavior
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26 .SH SYNOPSIS
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27 .nf
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28 #include <curl/curl.h>
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29
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30 #define CURLALTSVC_IMMEDIATELY (1<<0)
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31 #define CURLALTSVC_READONLYFILE (1<<2)
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32 #define CURLALTSVC_H1 (1<<3)
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33 #define CURLALTSVC_H2 (1<<4)
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34 #define CURLALTSVC_H3 (1<<5)
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35
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36 CURLcode curl_easy_setopt(CURL *handle, CURLOPT_ALTSVC_CTRL, long bitmask);
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37 .fi
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38 .SH EXPERIMENTAL
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39 Warning: this feature is early code and is marked as experimental. It can only
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40 be enabled by explicitly telling configure with \fB--enable-alt-svc\fP. You are
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41 advised to not ship this in production before the experimental label is
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42 removed.
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43 .SH DESCRIPTION
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44 Populate the long \fIbitmask\fP with the correct set of features to instruct
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45 libcurl how to handle Alt-Svc for the transfers using this handle.
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46
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47 libcurl will only accept Alt-Svc headers over a secure transport, meaning
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48 HTTPS. It will also only complete a request to an alternative origin if that
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49 origin is properly hosted over HTTPS. These requirements are there to make
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50 sure both the source and the destination are legitimate.
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51
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52 Setting any bit will enable the alt-svc engine.
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53 .IP "CURLALTSVC_IMMEDIATELY"
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54 If an Alt-Svc: header is received, this instructs libcurl to switch to one of
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55 those alternatives asap rather than to save it and use for the next
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56 request. (Not currently supported).
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57 .IP "CURLALTSVC_READONLYFILE"
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58 Do not write the alt-svc cache back to the file specified with
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59 \fICURLOPT_ALTSVC(3)\fP even if it gets updated. By default a file specified
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60 with that option will be read and written to as deemed necessary.
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61 .IP "CURLALTSVC_H1"
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62 Accept alternative services offered over HTTP/1.1.
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63 .IP "CURLALTSVC_H2"
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64 Accept alternative services offered over HTTP/2. This will only be used if
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65 libcurl was also built to actually support HTTP/2, otherwise this bit will be
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66 ignored.
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67 .IP "CURLALTSVC_H3"
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68 Accept alternative services offered over HTTP/3. This will only be used if
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69 libcurl was also built to actually support HTTP/3, otherwise this bit will be
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70 ignored.
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71 .SH DEFAULT
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72 0. No Alt-Svc treatment.
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73 .SH PROTOCOLS
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74 HTTPS
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75 .SH EXAMPLE
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76 .nf
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77 CURL *curl = curl_easy_init();
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78 if(curl) {
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79 curl_easy_setopt(curl, CURLOPT_ALTSVC_CTRL, CURLALTSVC_H1);
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80 curl_easy_setopt(curl, CURLOPT_ALTSVC, "altsvc-cache.txt");
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81 curl_easy_perform(curl);
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82 }
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83 .fi
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84 .SH AVAILABILITY
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85 Added in 7.64.1
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86 .SH RETURN VALUE
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87 Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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88 .SH "SEE ALSO"
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89 .BR CURLOPT_ALTSVC "(3), " CURLOPT_CONNECT_TO "(3), " CURLOPT_RESOLVE "(3), "