1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 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 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24 /* <DESC>
25 * A basic application source code using the multi interface doing two
26 * transfers in parallel.
27 * </DESC>
28 */
29
30 #include <stdio.h>
31 #include <string.h>
32
33 /* curl stuff */
34 #include <curl/curl.h>
35
36 /*
37 * Download an HTTP file and upload an FTP file simultaneously.
38 */
39
40 #define HANDLECOUNT 2 /* Number of simultaneous transfers */
41 #define HTTP_HANDLE 0 /* Index for the HTTP transfer */
42 #define FTP_HANDLE 1 /* Index for the FTP transfer */
43
main(void)44 int main(void)
45 {
46 CURL *handles[HANDLECOUNT];
47 CURLM *multi_handle;
48
49 int still_running = 1; /* keep number of running handles */
50 int i;
51
52 CURLMsg *msg; /* for picking up messages with the transfer status */
53 int msgs_left; /* how many messages are left */
54
55 /* Allocate one CURL handle per transfer */
56 for(i = 0; i < HANDLECOUNT; i++)
57 handles[i] = curl_easy_init();
58
59 /* set the options (I left out a few, you get the point anyway) */
60 curl_easy_setopt(handles[HTTP_HANDLE], CURLOPT_URL, "https://example.com");
61
62 curl_easy_setopt(handles[FTP_HANDLE], CURLOPT_URL, "ftp://example.com");
63 curl_easy_setopt(handles[FTP_HANDLE], CURLOPT_UPLOAD, 1L);
64
65 /* init a multi stack */
66 multi_handle = curl_multi_init();
67
68 /* add the individual transfers */
69 for(i = 0; i < HANDLECOUNT; i++)
70 curl_multi_add_handle(multi_handle, handles[i]);
71
72 while(still_running) {
73 CURLMcode mc = curl_multi_perform(multi_handle, &still_running);
74
75 if(still_running)
76 /* wait for activity, timeout or "nothing" */
77 mc = curl_multi_poll(multi_handle, NULL, 0, 1000, NULL);
78
79 if(mc)
80 break;
81 }
82 /* See how the transfers went */
83 /* !checksrc! disable EQUALSNULL 1 */
84 while((msg = curl_multi_info_read(multi_handle, &msgs_left)) != NULL) {
85 if(msg->msg == CURLMSG_DONE) {
86 int idx;
87
88 /* Find out which handle this message is about */
89 for(idx = 0; idx < HANDLECOUNT; idx++) {
90 int found = (msg->easy_handle == handles[idx]);
91 if(found)
92 break;
93 }
94
95 switch(idx) {
96 case HTTP_HANDLE:
97 printf("HTTP transfer completed with status %d\n", msg->data.result);
98 break;
99 case FTP_HANDLE:
100 printf("FTP transfer completed with status %d\n", msg->data.result);
101 break;
102 }
103 }
104 }
105
106 /* remove the transfers and cleanup the handles */
107 for(i = 0; i < HANDLECOUNT; i++) {
108 curl_multi_remove_handle(multi_handle, handles[i]);
109 curl_easy_cleanup(handles[i]);
110 }
111
112 curl_multi_cleanup(multi_handle);
113
114 return 0;
115 }
116
