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 ***************************************************************************/ 
/* Example code that uploads a file name 'foo' to a remote script that accepts
 * "HTML form based" (as described in RFC1738) uploads using HTTP POST.
 *
 * The imaginary form we'll fill in looks like:
 *
 * <form method="post" enctype="multipart/form-data" action="examplepost.cgi">
 * Enter file: <input type="file" name="sendfile" size="40">
 * Enter file name: <input type="text" name="filename" size="30">
 * <input type="submit" value="send" name="submit">
 * </form>
 *
 * This exact source code has not been verified to work.
 */ 
 
#include <stdio.h>
#include <string.h>
 
#include <curl/curl.h>
 
int main(int argc, char *argv[])
{
  CURL *curl;
  CURLcode res;
 
  struct curl_httppost *formpost=NULL;
  struct curl_httppost *lastptr=NULL;
  struct curl_slist *headerlist=NULL;
  static const char buf[] = "Expect:";
 
  curl_global_init(CURL_GLOBAL_ALL);
 
  /* Fill in the file upload field */ 
  curl_formadd(&formpost,
               &lastptr,
               CURLFORM_COPYNAME, "sendfile",
               CURLFORM_FILE, "postit2.c",
               CURLFORM_END);
 
  /* Fill in the filename field */ 
  curl_formadd(&formpost,
               &lastptr,
               CURLFORM_COPYNAME, "filename",
               CURLFORM_COPYCONTENTS, "postit2.c",
               CURLFORM_END);
 
 
  /* Fill in the submit field too, even if this is rarely needed */ 
  curl_formadd(&formpost,
               &lastptr,
               CURLFORM_COPYNAME, "submit",
               CURLFORM_COPYCONTENTS, "send",
               CURLFORM_END);
 
  curl = curl_easy_init();
  /* initalize custom header list (stating that Expect: 100-continue is not
     wanted */ 
  headerlist = curl_slist_append(headerlist, buf);
  if(curl) {
    /* what URL that receives this POST */ 
    curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/examplepost.cgi");
    if ( (argc == 2) && (!strcmp(argv[1], "noexpectheader")) )
      /* only disable 100-continue header if explicitly requested */ 
      curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);
    curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
    res = curl_easy_perform(curl);
 
    /* always cleanup */ 
    curl_easy_cleanup(curl);
 
    /* then cleanup the formpost chain */ 
    curl_formfree(formpost);
    /* free slist */ 
    curl_slist_free_all (headerlist);
  }
  return 0;
}