1 /***************************************************************************
2  *                                  _   _ ____  _
3  *  Project                     ___| | | |  _ \| |
4  *                             / __| | | | |_) | |
5  *                            | (__| |_| |  _ <| |___
6  *                             \___|\___/|_| \_\_____|
7  *
8  * Copyright (C) 1998 - 2017, 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.haxx.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  * HTTP Multipart formpost with file upload and two additional parts.
24  * </DESC>
25  */
26 /* Example code that uploads a file name 'foo' to a remote script that accepts
27  * "HTML form based" (as described in RFC1738) uploads using HTTP POST.
28  *
29  * The imaginary form we'll fill in looks like:
30  *
31  * <form method="post" enctype="multipart/form-data" action="examplepost.cgi">
32  * Enter file: <input type="file" name="sendfile" size="40">
33  * Enter file name: <input type="text" name="filename" size="30">
34  * <input type="submit" value="send" name="submit">
35  * </form>
36  *
37  * This exact source code has not been verified to work.
38  */
39 
40 #include <stdio.h>
41 #include <string.h>
42 
43 #include <curl/curl.h>
44 
45 int main(int argc, char *argv[])
46 {
47   CURL *curl;
48   CURLcode res;
49 
50   struct curl_httppost *formpost = NULL;
51   struct curl_httppost *lastptr = NULL;
52   struct curl_slist *headerlist = NULL;
53   static const char buf[] = "Expect:";
54 
55   curl_global_init(CURL_GLOBAL_ALL);
56 
57   /* Fill in the file upload field */
58   curl_formadd(&formpost,
59                &lastptr,
60                CURLFORM_COPYNAME, "sendfile",
61                CURLFORM_FILE, "postit2.c",
62                CURLFORM_END);
63 
64   /* Fill in the filename field */
65   curl_formadd(&formpost,
66                &lastptr,
67                CURLFORM_COPYNAME, "filename",
68                CURLFORM_COPYCONTENTS, "postit2.c",
69                CURLFORM_END);
70 
71 
72   /* Fill in the submit field too, even if this is rarely needed */
73   curl_formadd(&formpost,
74                &lastptr,
75                CURLFORM_COPYNAME, "submit",
76                CURLFORM_COPYCONTENTS, "send",
77                CURLFORM_END);
78 
79   curl = curl_easy_init();
80   /* initialize custom header list (stating that Expect: 100-continue is not
81      wanted */
82   headerlist = curl_slist_append(headerlist, buf);
83   if(curl) {
84     /* what URL that receives this POST */
85     curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/examplepost.cgi");
86     if((argc == 2) && (!strcmp(argv[1], "noexpectheader")))
87       /* only disable 100-continue header if explicitly requested */
88       curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);
89     curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
90 
91     /* Perform the request, res will get the return code */
92     res = curl_easy_perform(curl);
93     /* Check for errors */
94     if(res != CURLE_OK)
95       fprintf(stderr, "curl_easy_perform() failed: %s\n",
96               curl_easy_strerror(res));
97 
98     /* always cleanup */
99     curl_easy_cleanup(curl);
100 
101     /* then cleanup the formpost chain */
102     curl_formfree(formpost);
103     /* free slist */
104     curl_slist_free_all(headerlist);
105   }
106   return 0;
107 }
108