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Annotation of embedaddon/curl/docs/examples/postit2-formadd.c, revision 1.1.1.1

1.1       misho       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:   struct curl_httppost *formpost = NULL;
                     50:   struct curl_httppost *lastptr = NULL;
                     51:   struct curl_slist *headerlist = NULL;
                     52:   static const char buf[] = "Expect:";
                     53: 
                     54:   curl_global_init(CURL_GLOBAL_ALL);
                     55: 
                     56:   /* Fill in the file upload field */
                     57:   curl_formadd(&formpost,
                     58:                &lastptr,
                     59:                CURLFORM_COPYNAME, "sendfile",
                     60:                CURLFORM_FILE, "postit2.c",
                     61:                CURLFORM_END);
                     62: 
                     63:   /* Fill in the filename field */
                     64:   curl_formadd(&formpost,
                     65:                &lastptr,
                     66:                CURLFORM_COPYNAME, "filename",
                     67:                CURLFORM_COPYCONTENTS, "postit2.c",
                     68:                CURLFORM_END);
                     69: 
                     70: 
                     71:   /* Fill in the submit field too, even if this is rarely needed */
                     72:   curl_formadd(&formpost,
                     73:                &lastptr,
                     74:                CURLFORM_COPYNAME, "submit",
                     75:                CURLFORM_COPYCONTENTS, "send",
                     76:                CURLFORM_END);
                     77: 
                     78:   curl = curl_easy_init();
                     79:   /* initialize custom header list (stating that Expect: 100-continue is not
                     80:      wanted */
                     81:   headerlist = curl_slist_append(headerlist, buf);
                     82:   if(curl) {
                     83:     /* what URL that receives this POST */
                     84:     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/examplepost.cgi");
                     85:     if((argc == 2) && (!strcmp(argv[1], "noexpectheader")))
                     86:       /* only disable 100-continue header if explicitly requested */
                     87:       curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);
                     88:     curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
                     89: 
                     90:     /* Perform the request, res will get the return code */
                     91:     res = curl_easy_perform(curl);
                     92:     /* Check for errors */
                     93:     if(res != CURLE_OK)
                     94:       fprintf(stderr, "curl_easy_perform() failed: %s\n",
                     95:               curl_easy_strerror(res));
                     96: 
                     97:     /* always cleanup */
                     98:     curl_easy_cleanup(curl);
                     99: 
                    100:     /* then cleanup the formpost chain */
                    101:     curl_formfree(formpost);
                    102:     /* free slist */
                    103:     curl_slist_free_all(headerlist);
                    104:   }
                    105:   return 0;
                    106: }