server.js

// HTTP Portion
var http = require('http');
var fs = require('fs'); // Using the filesystem module
var httpServer = http.createServer(requestHandler);
var url = require('url');
httpServer.listen(8080);

function requestHandler(req, res) {

	var parsedUrl = url.parse(req.url);
	console.log("The Request is: " + parsedUrl.pathname);

	fs.readFile(__dirname + parsedUrl.pathname,
		// Callback function for reading
		function (err, data) {
			// if there is an error
			if (err) {
				res.writeHead(500);
				return res.end('Error loading ' + parsedUrl.pathname);
			}
			// Otherwise, send the data, the contents of the file
			res.writeHead(200);
			res.end(data);
  		}
  	);
}


// WebSocket Portion
// WebSockets work with the HTTP server
let io = require('socket.io').listen(httpServer);

// Register a callback function to run when we have an individual connection
// This is run for each individual user that connects

io.sockets.on('connection',
	// We are given a websocket object in our function
	function (socket) {

		console.log("We have a new client: " + socket.id);

		// When this user emits, client side: socket.emit('otherevent',some data);
		socket.on('othermouse', function(data) {
			// Data comes in as whatever was sent, including objects
			console.log("Received: 'othermouse' " + data.x + " " + data.y);

			// Send it to all of the clients
			socket.broadcast.emit('othermouse', data);
		});


		socket.on('disconnect', function() {
			console.log("Client has disconnected " + socket.id);
		});
	}
);