r3-websocket/index.js

const WebSocket = require('ws');
const config    = require('./config');
const http      = require('http');

var server = http.createServer();

const wss = new WebSocket.Server(
    {
        server : server,
        perMessageDeflate: false
    }
);

server.on(
    'listening',
    function() {

        var address = server.address();

        console.log(
            'R3 Websocket Server started listening on ' + address.address +
            ':' + address.port,
            '(' + address.family + ')'
        );

    }
);

wss.on(
    'connection',
    function connection(websocket) {

        websocket.on('message', function incoming(message) {
            console.log('received: %s', message);
        });

        websocket.send('something');
    }
);

server.listen(config.websocket.port);