Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/curl/docs/examples/threaded-ssl.c @ 28:dcabf2733f0f

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Allow PEP 440 local version version specifiers in a PyMuPDF version
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 19 Sep 2025 19:58:43 +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 - 2017, 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 /* <DESC>
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23 * Show the required mutex callback setups for GnuTLS and OpenSSL when using
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24 * libcurl multi-threaded.
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25 * </DESC>
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26 */
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27 /* A multi-threaded example that uses pthreads and fetches 4 remote files at
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28 * once over HTTPS. The lock callbacks and stuff assume OpenSSL <1.1 or GnuTLS
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29 * (libgcrypt) so far.
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30 *
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31 * OpenSSL docs for this:
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32 * https://www.openssl.org/docs/man1.0.2/man3/CRYPTO_num_locks.html
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33 * gcrypt docs for this:
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34 * https://gnupg.org/documentation/manuals/gcrypt/Multi_002dThreading.html
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35 */
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37 #define USE_OPENSSL /* or USE_GNUTLS accordingly */
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39 #include <stdio.h>
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40 #include <pthread.h>
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41 #include <curl/curl.h>
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43 #define NUMT 4
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44
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45 /* we have this global to let the callback get easy access to it */
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46 static pthread_mutex_t *lockarray;
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48 #ifdef USE_OPENSSL
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49 #include <openssl/crypto.h>
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50 static void lock_callback(int mode, int type, char *file, int line)
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51 {
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52 (void)file;
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53 (void)line;
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54 if(mode & CRYPTO_LOCK) {
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55 pthread_mutex_lock(&(lockarray[type]));
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56 }
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57 else {
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58 pthread_mutex_unlock(&(lockarray[type]));
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59 }
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60 }
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61
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62 static unsigned long thread_id(void)
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63 {
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64 unsigned long ret;
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66 ret = (unsigned long)pthread_self();
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67 return ret;
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68 }
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70 static void init_locks(void)
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71 {
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72 int i;
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74 lockarray = (pthread_mutex_t *)OPENSSL_malloc(CRYPTO_num_locks() *
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75 sizeof(pthread_mutex_t));
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76 for(i = 0; i<CRYPTO_num_locks(); i++) {
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77 pthread_mutex_init(&(lockarray[i]), NULL);
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78 }
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80 CRYPTO_set_id_callback((unsigned long (*)())thread_id);
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81 CRYPTO_set_locking_callback((void (*)())lock_callback);
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82 }
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84 static void kill_locks(void)
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85 {
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86 int i;
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88 CRYPTO_set_locking_callback(NULL);
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89 for(i = 0; i<CRYPTO_num_locks(); i++)
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90 pthread_mutex_destroy(&(lockarray[i]));
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92 OPENSSL_free(lockarray);
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93 }
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94 #endif
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96 #ifdef USE_GNUTLS
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97 #include <gcrypt.h>
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98 #include <errno.h>
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100 GCRY_THREAD_OPTION_PTHREAD_IMPL;
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101
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102 void init_locks(void)
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103 {
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104 gcry_control(GCRYCTL_SET_THREAD_CBS);
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105 }
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106
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107 #define kill_locks()
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108 #endif
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109
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110 /* List of URLs to fetch.*/
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111 const char * const urls[]= {
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112 "https://www.example.com/",
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113 "https://www2.example.com/",
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114 "https://www3.example.com/",
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115 "https://www4.example.com/",
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116 };
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117
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118 static void *pull_one_url(void *url)
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119 {
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120 CURL *curl;
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121
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122 curl = curl_easy_init();
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123 curl_easy_setopt(curl, CURLOPT_URL, url);
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124 /* this example doesn't verify the server's certificate, which means we
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125 might be downloading stuff from an impostor */
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126 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
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127 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
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128 curl_easy_perform(curl); /* ignores error */
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129 curl_easy_cleanup(curl);
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130
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131 return NULL;
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132 }
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133
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134 int main(int argc, char **argv)
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135 {
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136 pthread_t tid[NUMT];
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137 int i;
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138 (void)argc; /* we don't use any arguments in this example */
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139 (void)argv;
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140
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141 /* Must initialize libcurl before any threads are started */
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142 curl_global_init(CURL_GLOBAL_ALL);
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143
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144 init_locks();
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145
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146 for(i = 0; i< NUMT; i++) {
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147 int error = pthread_create(&tid[i],
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148 NULL, /* default attributes please */
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149 pull_one_url,
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150 (void *)urls[i]);
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151 if(0 != error)
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152 fprintf(stderr, "Couldn't run thread number %d, errno %d\n", i, error);
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153 else
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154 fprintf(stderr, "Thread %d, gets %s\n", i, urls[i]);
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155 }
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156
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157 /* now wait for all threads to terminate */
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158 for(i = 0; i< NUMT; i++) {
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159 pthread_join(tid[i], NULL);
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160 fprintf(stderr, "Thread %d terminated\n", i);
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161 }
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162
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163 kill_locks();
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164
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165 return 0;
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166 }