laravel-websockets/src/LaravelEcho/Http/Controllers/EchoController.php

<?php

namespace BeyondCode\LaravelWebSockets\LaravelEcho\Http\Controllers;

use Illuminate\Http\Request;
use Ratchet\ConnectionInterface;
use Illuminate\Http\JsonResponse;
use GuzzleHttp\Psr7\ServerRequest;
use Ratchet\Http\HttpServerInterface;
use Psr\Http\Message\RequestInterface;
use Symfony\Bridge\PsrHttpMessage\Factory\HttpFoundationFactory;

abstract class EchoController implements HttpServerInterface
{

    /**
     * This is called before or after a socket is closed (depends on how it's closed).  SendMessage to $conn will not result in an error if it has already been closed.
     * @param  ConnectionInterface $conn The socket/connection that is closing/closed
     * @throws \Exception
     */
    function onClose(ConnectionInterface $conn)
    {
        //
    }

    /**
     * If there is an error with one of the sockets, or somewhere in the application where an Exception is thrown,
     * the Exception is sent back down the stack, handled by the Server and bubbled back up the application through this method
     * @param  ConnectionInterface $conn
     * @param  \Exception $e
     * @throws \Exception
     */
    function onError(ConnectionInterface $conn, \Exception $e)
    {
        //
    }

    /**
     * @param \Ratchet\ConnectionInterface $conn
     * @param \Psr\Http\Message\RequestInterface $request null is default because PHP won't let me overload; don't pass null!!!
     * @throws \UnexpectedValueException if a RequestInterface is not passed
     */
    public function onOpen(ConnectionInterface $conn, RequestInterface $request = null)
    {
        $queryParameters = [];
        parse_str($request->getUri()->getQuery(), $queryParameters);

        $serverRequest = (new ServerRequest(
            $request->getMethod(),
            $request->getUri(),
            $request->getHeaders(),
            $request->getBody(),
            $request->getProtocolVersion()
        ))->withQueryParams($queryParameters);

        $response = $this(Request::createFromBase((new HttpFoundationFactory)->createRequest($serverRequest)));

        $conn->send(JsonResponse::create($response)->send());
        $conn->close();
    }

    /**
     * Triggered when a client sends data through the socket
     * @param  \Ratchet\ConnectionInterface $from The socket/connection that sent the message to your application
     * @param  string $msg The message received
     * @throws \Exception
     */
    function onMessage(ConnectionInterface $from, $msg)
    {
        //
    }

    abstract public function __invoke(Request $request);
}