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 * A basic application source code using the multi interface doing two
24 * transfers in parallel.
25 * </DESC>
26 */
27
28 #include <stdio.h>
29 #include <string.h>
30
31 /* somewhat unix-specific */
32 #include <sys/time.h>
33 #include <unistd.h>
34
35 /* curl stuff */
36 #include <curl/curl.h>
37
38 /*
39 * Download a HTTP file and upload an FTP file simultaneously.
40 */
41
42 #define HANDLECOUNT 2 /* Number of simultaneous transfers */
43 #define HTTP_HANDLE 0 /* Index for the HTTP transfer */
44 #define FTP_HANDLE 1 /* Index for the FTP transfer */
45
main(void)46 int main(void)
47 {
48 CURL *handles[HANDLECOUNT];
49 CURLM *multi_handle;
50
51 int still_running = 1; /* keep number of running handles */
52 int i;
53
54 CURLMsg *msg; /* for picking up messages with the transfer status */
55 int msgs_left; /* how many messages are left */
56
57 /* Allocate one CURL handle per transfer */
58 for(i = 0; i<HANDLECOUNT; i++)
59 handles[i] = curl_easy_init();
60
61 /* set the options (I left out a few, you'll get the point anyway) */
62 curl_easy_setopt(handles[HTTP_HANDLE], CURLOPT_URL, "https://example.com");
63
64 curl_easy_setopt(handles[FTP_HANDLE], CURLOPT_URL, "ftp://example.com");
65 curl_easy_setopt(handles[FTP_HANDLE], CURLOPT_UPLOAD, 1L);
66
67 /* init a multi stack */
68 multi_handle = curl_multi_init();
69
70 /* add the individual transfers */
71 for(i = 0; i<HANDLECOUNT; i++)
72 curl_multi_add_handle(multi_handle, handles[i]);
73
74 while(still_running) {
75 CURLMcode mc = curl_multi_perform(multi_handle, &still_running);
76
77 if(still_running)
78 /* wait for activity, timeout or "nothing" */
79 mc = curl_multi_poll(multi_handle, NULL, 0, 1000, NULL);
80
81 if(mc)
82 break;
83 }
84 /* See how the transfers went */
85 while((msg = curl_multi_info_read(multi_handle, &msgs_left))) {
86 if(msg->msg == CURLMSG_DONE) {
87 int idx;
88
89 /* Find out which handle this message is about */
90 for(idx = 0; idx<HANDLECOUNT; idx++) {
91 int found = (msg->easy_handle == handles[idx]);
92 if(found)
93 break;
94 }
95
96 switch(idx) {
97 case HTTP_HANDLE:
98 printf("HTTP transfer completed with status %d\n", msg->data.result);
99 break;
100 case FTP_HANDLE:
101 printf("FTP transfer completed with status %d\n", msg->data.result);
102 break;
103 }
104 }
105 }
106
107 curl_multi_cleanup(multi_handle);
108
109 /* Free the CURL handles */
110 for(i = 0; i<HANDLECOUNT; i++)
111 curl_easy_cleanup(handles[i]);
112
113 return 0;
114 }
115