/**
  * Sends a request and returns a response
  *
  * @param CartRecover_Request $request
  * @return Cart_Recover_Response
  */
 public function sendRequest(CartRecover_Request $request)
 {
     $url = Guzzle\Http\Url::factory($request->getUri());
     $url->setQuery($request->getParams());
     $this->client->setBaseUrl($url);
     $grequest = $this->client->createRequest($request->getMethod(), $url);
     $grequest->addHeader('Accept', 'application/json');
     $this->response = $this->client->send($grequest);
     if (!$this->response->isContentType('application/json')) {
         throw new CartRecover_Exception_UnexpectedValueException("Unknown response format.");
     }
     $response = new CartRecover_Response();
     $response->setRawResponse($this->response->__toString());
     $response->setBody($this->response->json());
     $response->setHeaders($this->response->getHeaders()->toArray());
     $response->setStatus($this->response->getReasonPhrase(), $this->response->getStatusCode());
     return $response;
 }