A simple proxied websocket server example

simple-wss.js

// app.js
// A simple proxying example
//
// Setup websocket server on port 19000
// Setup proxy on port 9000 to proxy to 19000
// Make a websocket request to 9000
//

var WebSocket = require('ws'),
  WebSocketServer = WebSocket.Server,
	proxy = require('http-proxy');

// goes in a loop sending messages to the server as soon as
// the servers are setup
var triggerClient = function() {
	var ws = new WebSocket('ws://localhost:9090/');
	ws.on('open', function() {
		console.log('ws: connection open');
		setInterval(function() {
			ws.send("Hello");
		}, 1000);
	});

	ws.on('message', function(data) {
		console.log('ws: got ' + data);
	});
}

// setup websocket server and a proxy
//
var go = function() {
	// setup a websocket server on port 19000
	//
	var wss = new WebSocketServer({ port: 19000 });
	wss.on('connection', function(ws) {
		console.log('wss: got connection');
		ws.on('message', function(data) {
			console.log('wss: got ' + data);
			ws.send('wss response: ' + data);
		});
	});


	// setup a proxy server
	var server = proxy.createServer(function (req, res, proxy) {
		proxy.proxyRequest(req, res, {
			host: 'localhost',
			port: 19000
		});
	});

	server.on('upgrade', function (req, socket, head) {
		console.log('proxy: got upgrade, proxying web request');
		server.proxy.proxyWebSocketRequest(req, socket, head, {
			host: 'localhost',
			port: 19000
		});
	});

	server.listen(9090, triggerClient);
};

process.nextTick(go);