code: function onMessage(TcpConnection $connection, $data) {
          $this->_router->connection = $this->_connection = $connection;
          $this->_router->requestData = $data;
          $this->_router->retMsg = '';
          $connection->forward = false;
          $path = explode('/', substr(explode('?', $_SERVER['REQUEST_URI'], 2)[0], 1));
          if (empty($path[0]) && count($path) == 1)
              $path = [];
          if (!$this->_router->locate($path, $_SERVER['REQUEST_METHOD']))
              $this->_router->retMsg = View::http(404, 'Not found.');
          if (ENABLE_SESSION)
              Http::sessionWriteClose();
          if (($connection->forward ?? false) == true)
              return;
          $connection->send($this->_router->retMsg ?? '');
      }
docs: {@inheritdoc}