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comparison mupdf-source/thirdparty/curl/docs/examples/10-at-a-time.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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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.haxx.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22 /* <DESC>
23 * Download many files in parallel, in the same thread.
24 * </DESC>
25 */
26
27 #include <errno.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #ifndef WIN32
31 # include <unistd.h>
32 #endif
33 #include <curl/curl.h>
34
35 static const char *urls[] = {
36 "https://www.microsoft.com",
37 "https://opensource.org",
38 "https://www.google.com",
39 "https://www.yahoo.com",
40 "https://www.ibm.com",
41 "https://www.mysql.com",
42 "https://www.oracle.com",
43 "https://www.ripe.net",
44 "https://www.iana.org",
45 "https://www.amazon.com",
46 "https://www.netcraft.com",
47 "https://www.heise.de",
48 "https://www.chip.de",
49 "https://www.ca.com",
50 "https://www.cnet.com",
51 "https://www.mozilla.org",
52 "https://www.cnn.com",
53 "https://www.wikipedia.org",
54 "https://www.dell.com",
55 "https://www.hp.com",
56 "https://www.cert.org",
57 "https://www.mit.edu",
58 "https://www.nist.gov",
59 "https://www.ebay.com",
60 "https://www.playstation.com",
61 "https://www.uefa.com",
62 "https://www.ieee.org",
63 "https://www.apple.com",
64 "https://www.symantec.com",
65 "https://www.zdnet.com",
66 "https://www.fujitsu.com/global/",
67 "https://www.supermicro.com",
68 "https://www.hotmail.com",
69 "https://www.ietf.org",
70 "https://www.bbc.co.uk",
71 "https://news.google.com",
72 "https://www.foxnews.com",
73 "https://www.msn.com",
74 "https://www.wired.com",
75 "https://www.sky.com",
76 "https://www.usatoday.com",
77 "https://www.cbs.com",
78 "https://www.nbc.com/",
79 "https://slashdot.org",
80 "https://www.informationweek.com",
81 "https://apache.org",
82 "https://www.un.org",
83 };
84
85 #define MAX_PARALLEL 10 /* number of simultaneous transfers */
86 #define NUM_URLS sizeof(urls)/sizeof(char *)
87
88 static size_t write_cb(char *data, size_t n, size_t l, void *userp)
89 {
90 /* take care of the data here, ignored in this example */
91 (void)data;
92 (void)userp;
93 return n*l;
94 }
95
96 static void add_transfer(CURLM *cm, int i)
97 {
98 CURL *eh = curl_easy_init();
99 curl_easy_setopt(eh, CURLOPT_WRITEFUNCTION, write_cb);
100 curl_easy_setopt(eh, CURLOPT_URL, urls[i]);
101 curl_easy_setopt(eh, CURLOPT_PRIVATE, urls[i]);
102 curl_multi_add_handle(cm, eh);
103 }
104
105 int main(void)
106 {
107 CURLM *cm;
108 CURLMsg *msg;
109 unsigned int transfers = 0;
110 int msgs_left = -1;
111 int still_alive = 1;
112
113 curl_global_init(CURL_GLOBAL_ALL);
114 cm = curl_multi_init();
115
116 /* Limit the amount of simultaneous connections curl should allow: */
117 curl_multi_setopt(cm, CURLMOPT_MAXCONNECTS, (long)MAX_PARALLEL);
118
119 for(transfers = 0; transfers < MAX_PARALLEL; transfers++)
120 add_transfer(cm, transfers);
121
122 do {
123 curl_multi_perform(cm, &still_alive);
124
125 while((msg = curl_multi_info_read(cm, &msgs_left))) {
126 if(msg->msg == CURLMSG_DONE) {
127 char *url;
128 CURL *e = msg->easy_handle;
129 curl_easy_getinfo(msg->easy_handle, CURLINFO_PRIVATE, &url);
130 fprintf(stderr, "R: %d - %s <%s>\n",
131 msg->data.result, curl_easy_strerror(msg->data.result), url);
132 curl_multi_remove_handle(cm, e);
133 curl_easy_cleanup(e);
134 }
135 else {
136 fprintf(stderr, "E: CURLMsg (%d)\n", msg->msg);
137 }
138 if(transfers < NUM_URLS)
139 add_transfer(cm, transfers++);
140 }
141 if(still_alive)
142 curl_multi_wait(cm, NULL, 0, 1000, NULL);
143
144 } while(still_alive || (transfers < NUM_URLS));
145
146 curl_multi_cleanup(cm);
147 curl_global_cleanup();
148
149 return EXIT_SUCCESS;
150 }