/**
  * @see CurlConnection::postRequest()
  */
 public function postRequest($url, $type = 'none', $data = NULL, $content_type = NULL)
 {
     try {
         return parent::postRequest($this->buildUrl($url), $type, $data, $content_type);
     } catch (HttpConnectionException $e) {
         $this->parseFedoraExceptions($e);
     }
 }