Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/curl/docs/examples/pop3-multi.c @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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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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23 /* <DESC>
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24 * POP3 example using the multi interface
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25 * </DESC>
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26 */
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28 #include <stdio.h>
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29 #include <string.h>
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30 #include <curl/curl.h>
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32 /* This is a simple example showing how to retrieve mail using libcurl's POP3
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33 * capabilities. It builds on the pop3-retr.c example to demonstrate how to use
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34 * libcurl's multi interface.
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35 *
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36 * Note that this example requires libcurl 7.20.0 or above.
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37 */
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39 #define MULTI_PERFORM_HANG_TIMEOUT 60 * 1000
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41 static struct timeval tvnow(void)
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42 {
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43 struct timeval now;
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44
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45 /* time() returns the value of time in seconds since the epoch */
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46 now.tv_sec = (long)time(NULL);
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47 now.tv_usec = 0;
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49 return now;
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50 }
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52 static long tvdiff(struct timeval newer, struct timeval older)
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53 {
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54 return (newer.tv_sec - older.tv_sec) * 1000 +
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55 (newer.tv_usec - older.tv_usec) / 1000;
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56 }
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58 int main(void)
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59 {
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60 CURL *curl;
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61 CURLM *mcurl;
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62 int still_running = 1;
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63 struct timeval mp_start;
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64
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65 curl_global_init(CURL_GLOBAL_DEFAULT);
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66
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67 curl = curl_easy_init();
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68 if(!curl)
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69 return 1;
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71 mcurl = curl_multi_init();
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72 if(!mcurl)
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73 return 2;
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75 /* Set username and password */
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76 curl_easy_setopt(curl, CURLOPT_USERNAME, "user");
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77 curl_easy_setopt(curl, CURLOPT_PASSWORD, "secret");
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79 /* This will retrieve message 1 from the user's mailbox */
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80 curl_easy_setopt(curl, CURLOPT_URL, "pop3://pop.example.com/1");
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81
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82 /* Tell the multi stack about our easy handle */
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83 curl_multi_add_handle(mcurl, curl);
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84
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85 /* Record the start time which we can use later */
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86 mp_start = tvnow();
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88 /* We start some action by calling perform right away */
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89 curl_multi_perform(mcurl, &still_running);
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91 while(still_running) {
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92 struct timeval timeout;
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93 fd_set fdread;
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94 fd_set fdwrite;
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95 fd_set fdexcep;
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96 int maxfd = -1;
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97 int rc;
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98 CURLMcode mc; /* curl_multi_fdset() return code */
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100 long curl_timeo = -1;
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101
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102 /* Initialise the file descriptors */
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103 FD_ZERO(&fdread);
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104 FD_ZERO(&fdwrite);
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105 FD_ZERO(&fdexcep);
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106
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107 /* Set a suitable timeout to play around with */
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108 timeout.tv_sec = 1;
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109 timeout.tv_usec = 0;
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110
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111 curl_multi_timeout(mcurl, &curl_timeo);
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112 if(curl_timeo >= 0) {
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113 timeout.tv_sec = curl_timeo / 1000;
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114 if(timeout.tv_sec > 1)
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115 timeout.tv_sec = 1;
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116 else
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117 timeout.tv_usec = (curl_timeo % 1000) * 1000;
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118 }
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119
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120 /* get file descriptors from the transfers */
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121 mc = curl_multi_fdset(mcurl, &fdread, &fdwrite, &fdexcep, &maxfd);
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122
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123 if(mc != CURLM_OK) {
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124 fprintf(stderr, "curl_multi_fdset() failed, code %d.\n", mc);
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125 break;
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126 }
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127
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128 /* On success the value of maxfd is guaranteed to be >= -1. We call
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129 select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
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130 no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
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131 to sleep 100ms, which is the minimum suggested value in the
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132 curl_multi_fdset() doc. */
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133
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134 if(maxfd == -1) {
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135 #ifdef _WIN32
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136 Sleep(100);
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137 rc = 0;
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138 #else
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139 /* Portable sleep for platforms other than Windows. */
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140 struct timeval wait = { 0, 100 * 1000 }; /* 100ms */
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141 rc = select(0, NULL, NULL, NULL, &wait);
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142 #endif
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143 }
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144 else {
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145 /* Note that on some platforms 'timeout' may be modified by select().
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146 If you need access to the original value save a copy beforehand. */
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147 rc = select(maxfd + 1, &fdread, &fdwrite, &fdexcep, &timeout);
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148 }
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149
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150 if(tvdiff(tvnow(), mp_start) > MULTI_PERFORM_HANG_TIMEOUT) {
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151 fprintf(stderr,
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152 "ABORTING: Since it seems that we would have run forever.\n");
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153 break;
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154 }
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155
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diff changeset
156 switch(rc) {
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157 case -1: /* select error */
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158 break;
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parents:
diff changeset
159 case 0: /* timeout */
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diff changeset
160 default: /* action */
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parents:
diff changeset
161 curl_multi_perform(mcurl, &still_running);
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parents:
diff changeset
162 break;
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diff changeset
163 }
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164 }
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165
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parents:
diff changeset
166 /* Always cleanup */
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
167 curl_multi_remove_handle(mcurl, curl);
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parents:
diff changeset
168 curl_multi_cleanup(mcurl);
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parents:
diff changeset
169 curl_easy_cleanup(curl);
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parents:
diff changeset
170 curl_global_cleanup();
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parents:
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171
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diff changeset
172 return 0;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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173 }