/**
* Perform HTTP request
*
* @param string $method HTTP method
* @param string $url Full URL including protocol
* @param array $params Any params
* @return mixed API response
*/
protected function doRequest($method, $url, $params, $headers)
{
$request = $this->transport->createRequest();
$request->setMethod($method);
$request->fromUrl($url);
$request->addHeaders($headers);
$request->setContent($params);
if ($this->isAuthenticated() && null !== $this->authenticator) {
$request = $this->authenticator->authenticate($request);
}
return $this->transport->send($request);
}
