[libmicrohttpd] How to process a post request without MHD_post_processor?

[Martin Dluhos]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi,

I am trying to send a post request to MHD_Daemon and then access the
post data from the request in MHD_AccessHandlerCallback function which
MHD_Daemon calls when it receives the request. For some reason,
however, I am unable to access the post data from the callback
function. Do I always need to use MHD_PostProcessor to process the
post data or can I do without it? Here is my code:

void
test_send_response_helper (void *cls, struct MHD_Connection *connection,
    const char *url, const char *method,
    const char *version, const char *upload_data,
    size_t *upload_data_size, void **con_cls)
{
  int ret_val;

  // print url and upload_data
  printf ("URL: %s\nDATA: %s\n", url, upload_data);
}

void
test_send_response ()
{
  long int ssl_port = 443;
  struct MHD_Daemon *ssl_daemon;

  ssl_daemon = MHD_start_daemon (MHD_USE_THREAD_PER_CONNECTION,
                             ssl_port,
                             NULL,
                             NULL,
                             &test_send_response_helper,
                             NULL,
                             MHD_OPTION_NOTIFY_COMPLETED,
                             request_completed,
                             NULL,
                             MHD_OPTION_END
                             );

  CURL *curl;
  CURLcode res;

  /* Initialize curl. */
  curl_global_init(CURL_GLOBAL_ALL);
  curl = curl_easy_init();

  /* Set curl options. */
  if (curl)
  {
    char* data_to_send = "field_name=value";

    /* We want to send a test request to the daemon. */
    curl_easy_setopt(curl, CURLOPT_URL,
"http://localhost/target/www.wikipedia.org+443";);
    curl_easy_setopt(curl, CURLOPT_PORT, ssl_port);
    curl_easy_setopt(curl, CURLOPT_POSTFIELDS, data_to_send);
    curl_easy_setopt(curl, CURLOPT_POST, 1L);

    /* Make the curl request. */
    res = curl_easy_perform(curl);
  }
...
}

When I call test_send_response(), I get the following output from the
printf statement:

$ ./test
URL: /target/www.wikipedia.org 443
DATA: (null)

I would like to retrieve whatever is passed as data_to_send with curl,
but instead I am getting (null). How can I access the data? Am I wrong
to expect the post data curl sends to be stored in the upload_data
variable in test_send_response_helper? What am I doing wrong?

Thanks,
Martin
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/

iQEcBAEBAgAGBQJPlxA9AAoJEOzT5+ruTKvq6o4H/1tD8CEm6paZn10aVfMMRJpw
lrUCxVFZTV/m/yrW3tGc/axr6IUxZmsl9FxVnFiGrKyVURQx7XSCHGiNfNMS1uZU
A0xfUfd7vR415S/Y9BcJT6CnKUsu+k+fuxnhUd+xjJNAPU5TsqnYvzMYTKl9Fo+a
PtwGBAjfIPwtsWkwgUruL7JYYh+4EwWUGPqyhgZe3nbVVEYH7EDsvWpJ0pc0ZIpb
GSr1uHKPrO4txfOg6qXHcF5f39JtzvN8UURl3aCZem6OP923uDQFCZhTQYJmjKjc
ZS+0O4wDGLJxt2tMVONYJ0ukdN3ubhjAwWXAJnX0BizJ6YAf6pd8iI/sH0tun1E=
=tOvi
-----END PGP SIGNATURE-----