[libcurl] Validation d'un formulaire

Bonjour,

J'essaie d'utiliser la librairie libcurl pour manipuler des pages html. J'essaie de valider un formulaire en me basant sur un exemple fourni par l'API qui montre comment transférer un fichier par un formulaire.
Voici mes fichiers:

main.c:

Code:

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/*****************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * $Id: postit2.c,v 1.4 2004/08/23 14:22:52 bagder Exp $
 *
 * 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>
#include <curl/types.h>
#include <curl/easy.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;
  char buf[] = "Expect:";
 
  curl_global_init(CURL_GLOBAL_ALL);
 
  /* Fill in the file upload field */
  curl_formadd(&formpost,
               &lastptr,
               CURLFORM_COPYNAME, "sendfile",
               CURLFORM_FILE, "C:\\favicon.ico",
               CURLFORM_END);
 
  /* Fill in the filename field */
  curl_formadd(&formpost,
               &lastptr,
               CURLFORM_COPYNAME, "filename",
               CURLFORM_COPYCONTENTS, "favicon.ico",
               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://localhost/test.php");
    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;
}

test.php

Code:

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<form method="post" enctype="multipart/form-data" action="test2.php">
	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>

test2.php

Code:

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<?php
	echo "Copying '" . $_FILES['sendfile']['tmp_name'] . "' to '" . $_POST['filename'] . "'";
	move_uploaded_file($_FILES['sendfile']['tmp_name'], $_POST['filename']);
?>

Quand je passe directement par le formulaire, alors mon fichier est bien transféré, par contre, quand je passe par mon programme, alors rien ne se passe.

J'aimerais comprendre pourquoi et comment y remédier. Quelle est la commande qui permet de faire le submit?

Merci d'avance