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    1: /***************************************************************************
    2:  *                                  _   _ ____  _
    3:  *  Project                     ___| | | |  _ \| |
    4:  *                             / __| | | | |_) | |
    5:  *                            | (__| |_| |  _ <| |___
    6:  *                             \___|\___/|_| \_\_____|
    7:  *
    8:  * Copyright (C) 1998 - 2019, 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:  */
   38: 
   39: #include <stdio.h>
   40: #include <string.h>
   41: 
   42: #include <curl/curl.h>
   43: 
   44: int main(int argc, char *argv[])
   45: {
   46:   CURL *curl;
   47:   CURLcode res;
   48: 
   49:   curl_mime *form = NULL;
   50:   curl_mimepart *field = NULL;
   51:   struct curl_slist *headerlist = NULL;
   52:   static const char buf[] = "Expect:";
   53: 
   54:   curl_global_init(CURL_GLOBAL_ALL);
   55: 
   56:   curl = curl_easy_init();
   57:   if(curl) {
   58:     /* Create the form */
   59:     form = curl_mime_init(curl);
   60: 
   61:     /* Fill in the file upload field */
   62:     field = curl_mime_addpart(form);
   63:     curl_mime_name(field, "sendfile");
   64:     curl_mime_filedata(field, "postit2.c");
   65: 
   66:     /* Fill in the filename field */
   67:     field = curl_mime_addpart(form);
   68:     curl_mime_name(field, "filename");
   69:     curl_mime_data(field, "postit2.c", CURL_ZERO_TERMINATED);
   70: 
   71:     /* Fill in the submit field too, even if this is rarely needed */
   72:     field = curl_mime_addpart(form);
   73:     curl_mime_name(field, "submit");
   74:     curl_mime_data(field, "send", CURL_ZERO_TERMINATED);
   75: 
   76:     /* initialize custom header list (stating that Expect: 100-continue is not
   77:        wanted */
   78:     headerlist = curl_slist_append(headerlist, buf);
   79:     /* what URL that receives this POST */
   80:     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/examplepost.cgi");
   81:     if((argc == 2) && (!strcmp(argv[1], "noexpectheader")))
   82:       /* only disable 100-continue header if explicitly requested */
   83:       curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);
   84:     curl_easy_setopt(curl, CURLOPT_MIMEPOST, form);
   85: 
   86:     /* Perform the request, res will get the return code */
   87:     res = curl_easy_perform(curl);
   88:     /* Check for errors */
   89:     if(res != CURLE_OK)
   90:       fprintf(stderr, "curl_easy_perform() failed: %s\n",
   91:               curl_easy_strerror(res));
   92: 
   93:     /* always cleanup */
   94:     curl_easy_cleanup(curl);
   95: 
   96:     /* then cleanup the form */
   97:     curl_mime_free(form);
   98:     /* free slist */
   99:     curl_slist_free_all(headerlist);
  100:   }
  101:   return 0;
  102: }