A PHP Library for serving multiple WebSocket services through a single port.

Normally, if you want to run multiple services, you would have to run WebSocket server on different ports. With DiffSocket, you can use a single port for different services.

composer require francium/diffsocket

Tutorial

Some hosting providers don't allow you to bind on multiple ports, especially if you're using a Free plan. An example is OpenShift.

I created DiffSocket, because my WebSocket server is hosted on OpenShift and needed a way to serve multiple WebSocket services through a single port.

These different services are provided through a single WebSocket port (ws-subins.rhcloud.com:8000) :

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DiffSocket uses Ratchet for the WebSocket server. You should learn Ratchet to create services.

• Configure server :

  <?php
  $DS = new Fr\DiffSocket(array(
    "server" => array(
      "host" => "127.0.0.1",
      "port" => "8000"
    )
  ));

• To add a new service, create a class under namespace Fr\DiffSocket\Service

  SayHello.php

  namespace Fr\DiffSocket\Service;
  
  use Ratchet\MessageComponentInterface;
  use Ratchet\ConnectionInterface;
  
  class SayHello implements MessageComponentInterface {
  
    public function onOpen(ConnectionInterface $conn){
      echo "New Connection - " . $conn->resourceId;
    }
  
    public function onClose(ConnectionInterface $conn){}
    public function onError(ConnectionInterface $conn, $error){}
  
    public function onMessage(ConnectionInterface $conn, $message){
      $conn->send("Hello");
    }
  
  }

  Then, you should register the service to DiffSocket by :

  $DS->addService("say-hello", "path/to/SayHello.php");

• Then, add the code to run the server

  $DS->run();

You may also add services as an array when the object is made :

$DS = new Fr\DiffSocket(array(
  "server" => array(
    "host" => "127.0.0.1",
    "port" => "8000"
  ),
  "services" => array(
    "say-hello" => __DIR__ . "/services/SayHello.php",
    "chat" => __DIR__ . "/services/Chat.php",
    "game" => __DIR__ . "/services/GameServer.php"
  )
));

Just add the service name in the URL as a GET parameter. Notice the use of / before ? :

ws://ws.example.com:8000/?service=say-hello
ws://ws.example.com:8000/?service=chat
ws://ws.example.com:8000/?service=game

An example in JavaScript :

var sayHelloWS = new WebSocket("ws://ws.example.com:8000/?service=say-hello");
var chatWS = new WebSocket("ws://ws.example.com:8000/?service=chat");
var gameWS = new WebSocket("ws://ws.example.com:8000/?service=game");

If the GET paramater service is not passed or the value passed to it doesn't match any available services, then DiffSocket would refuse the connection and close it.