/**
  * Build the handshake object
  *
  * @param \WebSocketServer\Http\Request  $request  HTTP request object
  * @param \WebSocketServer\Http\Response $response HTTP response object
  */
 public function __construct(Request $request, Response $response)
 {
     $this->request = $request;
     $this->response = $response;
     $response->setResponseLine('HTTP/1.1 101 WebSocket Protocol Handshake');
     $response->addHeader('Upgrade', 'WebSocket');
     $response->addHeader('Connection', 'Upgrade');
 }