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 * using the multi interface to do a multipart formpost without blocking
26 * </DESC>
27 */
28
29/*
30 * Warning: this example uses the deprecated form api. See "multi-post.c"
31 *          for a similar example using the mime api.
32 */
33
34#include <stdio.h>
35#include <string.h>
36#include <sys/time.h>
37
38#include <curl/curl.h>
39
40int main(void)
41{
42  CURL *curl;
43
44  CURLM *multi_handle;
45  int still_running = 0;
46
47  struct curl_httppost *formpost = NULL;
48  struct curl_httppost *lastptr = NULL;
49  struct curl_slist *headerlist = NULL;
50  static const char buf[] = "Expect:";
51
52  /* Fill in the file upload field. This makes libcurl load data from
53     the given file name when curl_easy_perform() is called. */
54  curl_formadd(&formpost,
55               &lastptr,
56               CURLFORM_COPYNAME, "sendfile",
57               CURLFORM_FILE, "multi-formadd.c",
58               CURLFORM_END);
59
60  /* Fill in the filename field */
61  curl_formadd(&formpost,
62               &lastptr,
63               CURLFORM_COPYNAME, "filename",
64               CURLFORM_COPYCONTENTS, "multi-formadd.c",
65               CURLFORM_END);
66
67  /* Fill in the submit field too, even if this is rarely needed */
68  curl_formadd(&formpost,
69               &lastptr,
70               CURLFORM_COPYNAME, "submit",
71               CURLFORM_COPYCONTENTS, "send",
72               CURLFORM_END);
73
74  curl = curl_easy_init();
75  multi_handle = curl_multi_init();
76
77  /* initialize custom header list (stating that Expect: 100-continue is not
78     wanted */
79  headerlist = curl_slist_append(headerlist, buf);
80  if(curl && multi_handle) {
81
82    /* what URL that receives this POST */
83    curl_easy_setopt(curl, CURLOPT_URL, "https://www.example.com/upload.cgi");
84    curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
85
86    curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);
87    curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
88
89    curl_multi_add_handle(multi_handle, curl);
90
91    do {
92      CURLMcode mc = curl_multi_perform(multi_handle, &still_running);
93
94      if(still_running)
95        /* wait for activity, timeout or "nothing" */
96        mc = curl_multi_poll(multi_handle, NULL, 0, 1000, NULL);
97
98      if(mc)
99        break;
100
101    } while(still_running);
102
103    curl_multi_cleanup(multi_handle);
104
105    /* always cleanup */
106    curl_easy_cleanup(curl);
107
108    /* then cleanup the formpost chain */
109    curl_formfree(formpost);
110
111    /* free slist */
112    curl_slist_free_all(headerlist);
113  }
114  return 0;
115}
116