Icicle\Http\Server\RequestHandler::onRequest PHP Method

    public function onRequest(Request $request, Socket $socket);

 /**
  * @coroutine
  *
  * @param \Icicle\Http\Message\Request $request
  * @param \Icicle\Socket\Socket $socket
  *
  * @return \Generator
  *
  * @resolve \Icicle\Http\Message\Response $response
  *
  * @throws \Icicle\Http\Exception\InvalidResultError If a Response object is not returned from
  *     Application::onHandshake().
  */
 public function onRequest(Request $request, Socket $socket)
 {
     $application = $this->handler->onRequest($request, $socket);
     if ($application instanceof \Generator) {
         $application = (yield from $application);
     } elseif ($application instanceof Awaitable) {
         $application = (yield $application);
     }
     if (!$application instanceof Application) {
         return $application;
         // Other response returned, let HTTP server handle it.
     }
     $response = $this->matcher->createResponse($application, $request, $socket);
     if (!$response instanceof WebSocketResponse) {
         return $response;
     }
     $message = $response->getMessage();
     $result = $application->onHandshake($message, $request, $socket);
     if ($result instanceof \Generator) {
         $result = (yield from $result);
     } elseif ($result instanceof Awaitable) {
         $result = (yield $result);
     }
     if (!$result instanceof Response) {
         throw new InvalidResultError(sprintf('A %s object was not returned from %s::onHandshake().', Response::class, Application::class), $result);
     }
     if ($result !== $message) {
         $response = new WebSocketResponse($response->getApplication(), $response->getConnection(), $result);
     }
     return $response;
 }