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 multipart formpost without blocking
24 * </DESC>
25 */
26
27 #include <stdio.h>
28 #include <string.h>
29 #include <sys/time.h>
30
31 #include <curl/curl.h>
32
main(void)33 int main(void)
34 {
35 CURL *curl;
36
37 CURLM *multi_handle;
38 int still_running = 0;
39
40 curl_mime *form = NULL;
41 curl_mimepart *field = NULL;
42 struct curl_slist *headerlist = NULL;
43 static const char buf[] = "Expect:";
44
45 curl = curl_easy_init();
46 multi_handle = curl_multi_init();
47
48 if(curl && multi_handle) {
49 /* Create the form */
50 form = curl_mime_init(curl);
51
52 /* Fill in the file upload field */
53 field = curl_mime_addpart(form);
54 curl_mime_name(field, "sendfile");
55 curl_mime_filedata(field, "multi-post.c");
56
57 /* Fill in the filename field */
58 field = curl_mime_addpart(form);
59 curl_mime_name(field, "filename");
60 curl_mime_data(field, "multi-post.c", CURL_ZERO_TERMINATED);
61
62 /* Fill in the submit field too, even if this is rarely needed */
63 field = curl_mime_addpart(form);
64 curl_mime_name(field, "submit");
65 curl_mime_data(field, "send", CURL_ZERO_TERMINATED);
66
67 /* initialize custom header list (stating that Expect: 100-continue is not
68 wanted */
69 headerlist = curl_slist_append(headerlist, buf);
70
71 /* what URL that receives this POST */
72 curl_easy_setopt(curl, CURLOPT_URL, "https://www.example.com/upload.cgi");
73 curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
74
75 curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);
76 curl_easy_setopt(curl, CURLOPT_MIMEPOST, form);
77
78 curl_multi_add_handle(multi_handle, curl);
79
80 do {
81 CURLMcode mc = curl_multi_perform(multi_handle, &still_running);
82
83 if(still_running)
84 /* wait for activity, timeout or "nothing" */
85 mc = curl_multi_poll(multi_handle, NULL, 0, 1000, NULL);
86
87 if(mc)
88 break;
89 } while(still_running);
90
91 curl_multi_cleanup(multi_handle);
92
93 /* always cleanup */
94 curl_easy_cleanup(curl);
95
96 /* then cleanup the form */
97 curl_mime_free(form);
98
99 /* free slist */
100 curl_slist_free_all(headerlist);
101 }
102 return 0;
103 }
104