1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2021, 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.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 * using the multi interface to do a single download
24 * </DESC>
25 */
26
27 #include <stdio.h>
28 #include <string.h>
29
30 /* somewhat unix-specific */
31 #include <sys/time.h>
32 #include <unistd.h>
33
34 /* curl stuff */
35 #include <curl/curl.h>
36
37 #ifdef _WIN32
38 #define WAITMS(x) Sleep(x)
39 #else
40 /* Portable sleep for platforms other than Windows. */
41 #define WAITMS(x) \
42 struct timeval wait = { 0, (x) * 1000 }; \
43 (void)select(0, NULL, NULL, NULL, &wait)
44 #endif
45
46 /*
47 * Simply download a HTTP file.
48 */
main(void)49 int main(void)
50 {
51 CURL *http_handle;
52 CURLM *multi_handle;
53 int still_running = 1; /* keep number of running handles */
54
55 curl_global_init(CURL_GLOBAL_DEFAULT);
56
57 http_handle = curl_easy_init();
58
59 /* set the options (I left out a few, you'll get the point anyway) */
60 curl_easy_setopt(http_handle, CURLOPT_URL, "https://www.example.com/");
61
62 /* init a multi stack */
63 multi_handle = curl_multi_init();
64
65 /* add the individual transfers */
66 curl_multi_add_handle(multi_handle, http_handle);
67
68 do {
69 CURLMcode mc = curl_multi_perform(multi_handle, &still_running);
70
71 if(!mc)
72 /* wait for activity, timeout or "nothing" */
73 mc = curl_multi_poll(multi_handle, NULL, 0, 1000, NULL);
74
75 if(mc) {
76 fprintf(stderr, "curl_multi_poll() failed, code %d.\n", (int)mc);
77 break;
78 }
79
80 } while(still_running);
81
82 curl_multi_remove_handle(multi_handle, http_handle);
83
84 curl_easy_cleanup(http_handle);
85
86 curl_multi_cleanup(multi_handle);
87
88 curl_global_cleanup();
89
90 return 0;
91 }
92