private function getResumeUri()
 {
     $result = null;
     $body = $this->request->getPostBody();
     if ($body) {
         $headers = array('content-type' => 'application/json; charset=UTF-8', 'content-length' => GoogleGAL_Utils::getStrLen($body), 'x-upload-content-type' => $this->mimeType, 'x-upload-content-length' => $this->size, 'expect' => '');
         $this->request->setRequestHeaders($headers);
     }
     $response = $this->client->getIo()->makeRequest($this->request);
     $location = $response->getResponseHeader('location');
     $code = $response->getResponseHttpCode();
     if (200 == $code && true == $location) {
         return $location;
     }
     $message = $code;
     $body = @json_decode($response->getResponseBody());
     if (!empty($body->error->errors)) {
         $message .= ': ';
         foreach ($body->error->errors as $error) {
             $message .= "{$error->domain}, {$error->message};";
         }
         $message = rtrim($message, ';');
     }
     $error = "Failed to start the resumable upload (HTTP {$message})";
     $this->client->getLogger()->error($error);
     throw new GoogleGAL_Exception($error);
 }
 private function getResumeUri()
 {
     $result = null;
     $body = $this->request->getPostBody();
     if ($body) {
         $headers = array('content-type' => 'application/json; charset=UTF-8', 'content-length' => GoogleGAL_Utils::getStrLen($body), 'x-upload-content-type' => $this->mimeType, 'x-upload-content-length' => $this->size, 'expect' => '');
         $this->request->setRequestHeaders($headers);
     }
     $response = $this->client->getIo()->makeRequest($this->request);
     $location = $response->getResponseHeader('location');
     $code = $response->getResponseHttpCode();
     if (200 == $code && true == $location) {
         return $location;
     }
     throw new GoogleGAL_Exception("Failed to start the resumable upload");
 }