docs/examples/postit2.c

   1 /*****************************************************************************
   2  *                                  _   _ ____  _
   3  *  Project                     ___| | | |  _ \| |
   4  *                             / __| | | | |_) | |
   5  *                            | (__| |_| |  _ <| |___
   6  *                             \___|\___/|_| \_\_____|
   7  *
   8  *
   9  * Example code that uploads a file name 'foo' to a remote script that accepts
  10  * "HTML form based" (as described in RFC1738) uploads using HTTP POST.
  11  *
  12  * The imaginary form we'll fill in looks like:
  13  *
  14  * <form method="post" enctype="multipart/form-data" action="examplepost.cgi">
  15  * Enter file: <input type="file" name="sendfile" size="40">
  16  * Enter file name: <input type="text" name="filename" size="30">
  17  * <input type="submit" value="send" name="submit">
  18  * </form>
  19  *
  20  * This exact source code has not been verified to work.
  21  */
  22
  23 #include <stdio.h>
  24 #include <string.h>
  25
  26 #include <curl/curl.h>
  27 #include <curl/types.h>
  28 #include <curl/easy.h>
  29
  30 int main(int argc, char *argv[])
  31 {
  32   CURL *curl;
  33   CURLcode res;
  34
  35   struct curl_httppost *formpost=NULL;
  36   struct curl_httppost *lastptr=NULL;
  37   struct curl_slist *headerlist=NULL;
  38   static const char buf[] = "Expect:";
  39
  40   curl_global_init(CURL_GLOBAL_ALL);
  41
  42   /* Fill in the file upload field */
  43   curl_formadd(&formpost,
  44                &lastptr,
  45                CURLFORM_COPYNAME, "sendfile",
  46                CURLFORM_FILE, "postit2.c",
  47                CURLFORM_END);
  48
  49   /* Fill in the filename field */
  50   curl_formadd(&formpost,
  51                &lastptr,
  52                CURLFORM_COPYNAME, "filename",
  53                CURLFORM_COPYCONTENTS, "postit2.c",
  54                CURLFORM_END);
  55
  56
  57   /* Fill in the submit field too, even if this is rarely needed */
  58   curl_formadd(&formpost,
  59                &lastptr,
  60                CURLFORM_COPYNAME, "submit",
  61                CURLFORM_COPYCONTENTS, "send",
  62                CURLFORM_END);
  63
  64   curl = curl_easy_init();
  65   /* initalize custom header list (stating that Expect: 100-continue is not
  66      wanted */
  67   headerlist = curl_slist_append(headerlist, buf);
  68   if(curl) {
  69     /* what URL that receives this POST */
  70     curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/examplepost.cgi");
  71     if ( (argc == 2) && (!strcmp(argv[1], "noexpectheader")) )
  72       /* only disable 100-continue header if explicitly requested */
  73       curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);
  74     curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
  75     res = curl_easy_perform(curl);
  76
  77     /* always cleanup */
  78     curl_easy_cleanup(curl);
  79
  80     /* then cleanup the formpost chain */
  81     curl_formfree(formpost);
  82     /* free slist */
  83     curl_slist_free_all (headerlist);
  84   }
  85   return 0;
  86 }