Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/curl/docs/examples/progressfunc.c @ 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 /* <DESC>
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23 * Use the progress callbacks, old and/or new one depending on available
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24 * libcurl version.
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25 * </DESC>
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26 */
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27 #include <stdio.h>
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28 #include <curl/curl.h>
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29
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30 #if LIBCURL_VERSION_NUM >= 0x073d00
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31 /* In libcurl 7.61.0, support was added for extracting the time in plain
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32 microseconds. Older libcurl versions are stuck in using 'double' for this
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33 information so we complicate this example a bit by supporting either
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34 approach. */
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35 #define TIME_IN_US 1 /* microseconds */
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36 #define TIMETYPE curl_off_t
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37 #define TIMEOPT CURLINFO_TOTAL_TIME_T
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38 #define MINIMAL_PROGRESS_FUNCTIONALITY_INTERVAL 3000000
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39 #else
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40 #define TIMETYPE double
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41 #define TIMEOPT CURLINFO_TOTAL_TIME
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42 #define MINIMAL_PROGRESS_FUNCTIONALITY_INTERVAL 3
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43 #endif
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44
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45 #define STOP_DOWNLOAD_AFTER_THIS_MANY_BYTES 6000
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46
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47 struct myprogress {
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48 TIMETYPE lastruntime; /* type depends on version, see above */
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49 CURL *curl;
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50 };
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51
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52 /* this is how the CURLOPT_XFERINFOFUNCTION callback works */
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53 static int xferinfo(void *p,
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54 curl_off_t dltotal, curl_off_t dlnow,
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55 curl_off_t ultotal, curl_off_t ulnow)
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56 {
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57 struct myprogress *myp = (struct myprogress *)p;
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58 CURL *curl = myp->curl;
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59 TIMETYPE curtime = 0;
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60
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61 curl_easy_getinfo(curl, TIMEOPT, &curtime);
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62
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63 /* under certain circumstances it may be desirable for certain functionality
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64 to only run every N seconds, in order to do this the transaction time can
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65 be used */
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66 if((curtime - myp->lastruntime) >= MINIMAL_PROGRESS_FUNCTIONALITY_INTERVAL) {
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67 myp->lastruntime = curtime;
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68 #ifdef TIME_IN_US
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69 fprintf(stderr, "TOTAL TIME: %" CURL_FORMAT_CURL_OFF_T ".%06ld\r\n",
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70 (curtime / 1000000), (long)(curtime % 1000000));
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71 #else
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72 fprintf(stderr, "TOTAL TIME: %f \r\n", curtime);
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73 #endif
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74 }
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75
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76 fprintf(stderr, "UP: %" CURL_FORMAT_CURL_OFF_T " of %" CURL_FORMAT_CURL_OFF_T
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77 " DOWN: %" CURL_FORMAT_CURL_OFF_T " of %" CURL_FORMAT_CURL_OFF_T
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78 "\r\n",
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79 ulnow, ultotal, dlnow, dltotal);
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80
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81 if(dlnow > STOP_DOWNLOAD_AFTER_THIS_MANY_BYTES)
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82 return 1;
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83 return 0;
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84 }
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85
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86 #if LIBCURL_VERSION_NUM < 0x072000
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87 /* for libcurl older than 7.32.0 (CURLOPT_PROGRESSFUNCTION) */
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88 static int older_progress(void *p,
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89 double dltotal, double dlnow,
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90 double ultotal, double ulnow)
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91 {
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92 return xferinfo(p,
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93 (curl_off_t)dltotal,
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94 (curl_off_t)dlnow,
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95 (curl_off_t)ultotal,
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96 (curl_off_t)ulnow);
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97 }
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98 #endif
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99
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100 int main(void)
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101 {
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102 CURL *curl;
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103 CURLcode res = CURLE_OK;
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104 struct myprogress prog;
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105
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106 curl = curl_easy_init();
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107 if(curl) {
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108 prog.lastruntime = 0;
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109 prog.curl = curl;
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110
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111 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
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112
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113 #if LIBCURL_VERSION_NUM >= 0x072000
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114 /* xferinfo was introduced in 7.32.0, no earlier libcurl versions will
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115 compile as they won't have the symbols around.
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116
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117 If built with a newer libcurl, but running with an older libcurl:
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118 curl_easy_setopt() will fail in run-time trying to set the new
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119 callback, making the older callback get used.
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120
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121 New libcurls will prefer the new callback and instead use that one even
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122 if both callbacks are set. */
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123
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124 curl_easy_setopt(curl, CURLOPT_XFERINFOFUNCTION, xferinfo);
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125 /* pass the struct pointer into the xferinfo function, note that this is
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126 an alias to CURLOPT_PROGRESSDATA */
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127 curl_easy_setopt(curl, CURLOPT_XFERINFODATA, &prog);
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128 #else
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129 curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, older_progress);
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130 /* pass the struct pointer into the progress function */
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131 curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, &prog);
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132 #endif
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133
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134 curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0L);
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135 res = curl_easy_perform(curl);
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136
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137 if(res != CURLE_OK)
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138 fprintf(stderr, "%s\n", curl_easy_strerror(res));
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139
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140 /* always cleanup */
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141 curl_easy_cleanup(curl);
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142 }
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143 return (int)res;
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144 }