/**
* Closes the connection according to the WebSocket protocol
*
* If an endpoint receives a Close frame and that endpoint did not
* previously send a Close frame, the endpoint MUST send a Close frame
* in response. It SHOULD do so as soon as is practical. An endpoint
* MAY delay sending a close frame until its current message is sent
* (for instance, if the majority of a fragmented message is already
* sent, an endpoint MAY send the remaining fragments before sending a
* Close frame). However, there is no guarantee that the endpoint which
* has already sent a Close frame will continue to process data.
* After both sending and receiving a close message, an endpoint
* considers the WebSocket connection closed, and MUST close the
* underlying TCP connection. The server MUST close the underlying TCP
* connection immediately; the client SHOULD wait for the server to
* close the connection but MAY close the connection at any time after
* sending and receiving a close message, e.g. if it has not received a
* TCP close from the server in a reasonable time period.
*
* @param int|Exception $statusCode
* @return boolean
*/
public function close($code = Protocol::CLOSE_NORMAL)
{
try {
if (!$this->handshaked) {
$response = $this->protocol->getResponseError($code);
$this->socket->send($response);
} else {
$response = $this->protocol->getCloseFrame($code);
$this->socket->send($response);
}
} catch (Exception $e) {
$this->log('Unable to send close message', 'warning');
}
if ($this->application && method_exists($this->application, 'onDisconnect')) {
$this->application->onDisconnect($this);
}
$this->socket->disconnect();
$this->manager->removeConnection($this);
}