Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/curl/docs/examples/smtp-multi.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 - 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 * SMTP example using the multi interface
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25 * </DESC>
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26 */
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28 #include <string.h>
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29 #include <curl/curl.h>
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31 /* This is an example showing how to send mail using libcurl's SMTP
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32 * capabilities. It builds on the smtp-mail.c example to demonstrate how to use
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33 * libcurl's multi interface.
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34 *
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35 * Note that this example requires libcurl 7.20.0 or above.
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36 */
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38 #define FROM "<sender@example.com>"
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39 #define TO "<recipient@example.com>"
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40 #define CC "<info@example.com>"
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41
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42 #define MULTI_PERFORM_HANG_TIMEOUT 60 * 1000
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43
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44 static const char *payload_text[] = {
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45 "Date: Mon, 29 Nov 2010 21:54:29 +1100\r\n",
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46 "To: " TO "\r\n",
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47 "From: " FROM " (Example User)\r\n",
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48 "Cc: " CC " (Another example User)\r\n",
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49 "Message-ID: <dcd7cb36-11db-487a-9f3a-e652a9458efd@"
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50 "rfcpedant.example.org>\r\n",
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51 "Subject: SMTP multi example message\r\n",
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52 "\r\n", /* empty line to divide headers from body, see RFC5322 */
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53 "The body of the message starts here.\r\n",
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54 "\r\n",
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55 "It could be a lot of lines, could be MIME encoded, whatever.\r\n",
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56 "Check RFC5322.\r\n",
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57 NULL
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58 };
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59
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60 struct upload_status {
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61 int lines_read;
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62 };
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63
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64 static size_t payload_source(void *ptr, size_t size, size_t nmemb, void *userp)
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65 {
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66 struct upload_status *upload_ctx = (struct upload_status *)userp;
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67 const char *data;
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68
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69 if((size == 0) || (nmemb == 0) || ((size*nmemb) < 1)) {
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70 return 0;
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71 }
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72
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73 data = payload_text[upload_ctx->lines_read];
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74
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75 if(data) {
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76 size_t len = strlen(data);
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77 memcpy(ptr, data, len);
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78 upload_ctx->lines_read++;
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79
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80 return len;
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81 }
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82
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83 return 0;
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84 }
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86 static struct timeval tvnow(void)
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87 {
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88 struct timeval now;
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90 /* time() returns the value of time in seconds since the epoch */
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91 now.tv_sec = (long)time(NULL);
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92 now.tv_usec = 0;
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93
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94 return now;
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95 }
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97 static long tvdiff(struct timeval newer, struct timeval older)
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98 {
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99 return (newer.tv_sec - older.tv_sec) * 1000 +
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100 (newer.tv_usec - older.tv_usec) / 1000;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
101 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
102
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parents:
diff changeset
103 int main(void)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
104 {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
105 CURL *curl;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
106 CURLM *mcurl;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
107 int still_running = 1;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
108 struct timeval mp_start;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
109 struct curl_slist *recipients = NULL;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
110 struct upload_status upload_ctx;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
111
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
112 upload_ctx.lines_read = 0;
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parents:
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113
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Franz Glasner <fzglas.hg@dom66.de>
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diff changeset
114 curl_global_init(CURL_GLOBAL_DEFAULT);
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parents:
diff changeset
115
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diff changeset
116 curl = curl_easy_init();
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
117 if(!curl)
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Franz Glasner <fzglas.hg@dom66.de>
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diff changeset
118 return 1;
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119
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
120 mcurl = curl_multi_init();
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
121 if(!mcurl)
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
122 return 2;
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parents:
diff changeset
123
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
124 /* This is the URL for your mailserver */
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
125 curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.com");
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126
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parents:
diff changeset
127 /* Note that this option isn't strictly required, omitting it will result in
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:
diff changeset
128 * libcurl sending the MAIL FROM command with empty sender data. All
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parents:
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129 * autoresponses should have an empty reverse-path, and should be directed
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parents:
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130 * to the address in the reverse-path which triggered them. Otherwise, they
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
131 * could cause an endless loop. See RFC 5321 Section 4.5.5 for more details.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
132 */
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
133 curl_easy_setopt(curl, CURLOPT_MAIL_FROM, FROM);
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134
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parents:
diff changeset
135 /* Add two recipients, in this particular case they correspond to the
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
136 * To: and Cc: addressees in the header, but they could be any kind of
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
137 * recipient. */
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
138 recipients = curl_slist_append(recipients, TO);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
139 recipients = curl_slist_append(recipients, CC);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
140 curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
141
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
142 /* We're using a callback function to specify the payload (the headers and
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
143 * body of the message). You could just use the CURLOPT_READDATA option to
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
144 * specify a FILE pointer to read from. */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
145 curl_easy_setopt(curl, CURLOPT_READFUNCTION, payload_source);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
146 curl_easy_setopt(curl, CURLOPT_READDATA, &upload_ctx);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
147 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
148
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
149 /* Tell the multi stack about our easy handle */
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
150 curl_multi_add_handle(mcurl, curl);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
151
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
152 /* Record the start time which we can use later */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
153 mp_start = tvnow();
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
154
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
155 /* We start some action by calling perform right away */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
156 curl_multi_perform(mcurl, &still_running);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
157
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
158 while(still_running) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
159 struct timeval timeout;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
160 fd_set fdread;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
161 fd_set fdwrite;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
162 fd_set fdexcep;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
163 int maxfd = -1;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
164 int rc;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
165 CURLMcode mc; /* curl_multi_fdset() return code */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
166
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
167 long curl_timeo = -1;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
168
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parents:
diff changeset
169 /* Initialise the file descriptors */
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
170 FD_ZERO(&fdread);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
171 FD_ZERO(&fdwrite);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
172 FD_ZERO(&fdexcep);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
173
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
174 /* Set a suitable timeout to play around with */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
175 timeout.tv_sec = 1;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
176 timeout.tv_usec = 0;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
177
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
178 curl_multi_timeout(mcurl, &curl_timeo);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
179 if(curl_timeo >= 0) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
180 timeout.tv_sec = curl_timeo / 1000;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
181 if(timeout.tv_sec > 1)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
182 timeout.tv_sec = 1;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
183 else
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
184 timeout.tv_usec = (curl_timeo % 1000) * 1000;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
185 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
186
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
187 /* get file descriptors from the transfers */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
188 mc = curl_multi_fdset(mcurl, &fdread, &fdwrite, &fdexcep, &maxfd);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
189
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
190 if(mc != CURLM_OK) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
191 fprintf(stderr, "curl_multi_fdset() failed, code %d.\n", mc);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
192 break;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
193 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
194
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
195 /* On success the value of maxfd is guaranteed to be >= -1. We call
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
196 select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
197 no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
198 to sleep 100ms, which is the minimum suggested value in the
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
199 curl_multi_fdset() doc. */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
200
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
201 if(maxfd == -1) {
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202 #ifdef _WIN32
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203 Sleep(100);
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204 rc = 0;
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205 #else
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206 /* Portable sleep for platforms other than Windows. */
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207 struct timeval wait = { 0, 100 * 1000 }; /* 100ms */
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208 rc = select(0, NULL, NULL, NULL, &wait);
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209 #endif
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210 }
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211 else {
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212 /* Note that on some platforms 'timeout' may be modified by select().
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213 If you need access to the original value save a copy beforehand. */
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214 rc = select(maxfd + 1, &fdread, &fdwrite, &fdexcep, &timeout);
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215 }
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216
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217 if(tvdiff(tvnow(), mp_start) > MULTI_PERFORM_HANG_TIMEOUT) {
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218 fprintf(stderr,
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219 "ABORTING: Since it seems that we would have run forever.\n");
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220 break;
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221 }
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222
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223 switch(rc) {
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224 case -1: /* select error */
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225 break;
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226 case 0: /* timeout */
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227 default: /* action */
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228 curl_multi_perform(mcurl, &still_running);
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229 break;
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230 }
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231 }
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232
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233 /* Free the list of recipients */
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234 curl_slist_free_all(recipients);
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235
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236 /* Always cleanup */
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237 curl_multi_remove_handle(mcurl, curl);
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238 curl_multi_cleanup(mcurl);
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239 curl_easy_cleanup(curl);
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240 curl_global_cleanup();
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241
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242 return 0;
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243 }