server.js

var ssdp = require("peer-ssdp"),
	peer = ssdp.createPeer(),
	uuid = require('node-uuid'),
	myUuid = uuid.v4(),
	fs = require('fs'),
	express = require('express'),
	http = require('http'),
	app = express(),
	querystring = require('querystring'),
	request = require('superagent')
	logger = require('morgan')
	bodyParser = require('body-parser')
	methodOverride = require('method-override');
	var os = require("os");

// var argv = require('optimist')
//     .usage('Usage: $0 --name [name]')
//     .demand(['name'])
// 	.argv;
	
var hostname = os.hostname();
var name =  hostname;

app.set('port', 8008);

app.use(function(req, res, next) {
	var data = '';
	req.setEncoding('utf8');
	req.on('data', function(chunk) {
		data += chunk;
	});
	req.on('end', function() {
		req.rawBody = data;
		next();
	});
});
app.disable('x-powered-by');
app.use(express.static(__dirname + '/public'));
app.use(logger());
app.use(bodyParser());
app.use(methodOverride());
app.use(function (req, res, next) {
	res.removeHeader("Connection");
	next();
});

app.disable('x-powered-by');

var server = http.createServer(app);

server.listen(app.get('port'), function(){
  console.log('Express server listening on port ' + app.get('port'));
});

var WebSocketServer = require('websocket').server;
var WebSocketRouter = require('websocket').router;

var wsServer = new WebSocketServer({
    httpServer: server,
    // You should not use autoAcceptConnections for production
    // applications, as it defeats all standard cross-origin protection
    // facilities built into the protocol and the browser.  You should
    // *always* verify the connection's origin and decide whether or not
    // to accept it.
    autoAcceptConnections: false
});

var wssRouter = new WebSocketRouter();
wssRouter.attachServer(wsServer);

wsServer.on('request', function(request) {
});

wssRouter.mount('/stage','', function(request) {
	global.stageConnection = request.accept(request.origin);

	global.stageConnection.send(JSON.stringify({
		cmd: "idle"
	}));
});

wssRouter.mount('/system/control','', function(request) {
	var connection = request.accept(request.origin);
	console.log("system/control");
});

wssRouter.mount('/connection','', function(request) {
	var connection = request.accept(request.origin);
	var name;
	connection.on('message', function(message) {
		var cmd = JSON.parse(message.utf8Data);
		if(cmd.type == "REGISTER") {
			name = cmd.name;
			connection.send(JSON.stringify({
				type: "CHANNELREQUEST",
				"senderId": 1,
				"requestId": 1
			}));

			wssRouter.mount("/receiver/"+cmd.name, '', function(request) {
				var receiverConnection = request.accept(request.origin);
				var appName = request.resourceURL.pathname.replace('/receiver/','').replace('Dev','');
				Apps.registered[appName].registerReceiver(receiverConnection);
			});

		} else if(cmd.type == "CHANNELRESPONSE") {
			connection.send(JSON.stringify({
				type: "NEWCHANNEL",
				"senderId": 1,
				"requestId": 1,
				"URL": "ws://localhost:8008/receiver/"+name
			}));
		}
	});
});

var regex = new RegExp('^/session/.*$');
wssRouter.mount(regex, '', function(request) {
	var sessionConn = request.accept(request.origin);
	console.log("Session up");

	var appName = request.resourceURL.pathname.replace('/session/','');
	var sessionId = request.resourceURL.search.replace('?','');

	var targetApp = Apps.registered[appName];

	if(targetApp) {
		targetApp.registerSession(sessionConn);
	}
});

function getIPAddress() {
	var n = require('os').networkInterfaces();
	var ip = []
	for (var k in n) {
		var inter = n[k];
		for (var j in inter) {
			if (inter[j].family === 'IPv4' && !inter[j].internal) {
				return inter[j].address
			}
		}
	}
}

var addr = getIPAddress();
console.log(addr);
setupApps(addr);
setupRoutes(addr);
setupSSDP(addr);


var Apps;
function setupApps(addr) {
	Apps = require('./apps/apps.js');
	Apps.init(fs, app);
	Apps.registerApp(app, addr, "ChromeCast", "https://www.gstatic.com/cv/receiver.html?$query", "");
	Apps.registerApp(app, addr, "YouTube", "https://www.youtube.com/tv?$query", "");
	Apps.registerApp(app, addr, "PlayMovies", "https://play.google.com/video/avi/eureka?$query", "");
	Apps.registerApp(app, addr, "GoogleMusic", "https://jmt17.google.com/sjdev/cast/player", "");
	Apps.registerApp(app, addr, "GoogleCastSampleApp", "http://anzymrcvr.appspot.com/receiver/anzymrcvr.html", "");
	Apps.registerApp(app, addr, "GoogleCastPlayer", "https://www.gstatic.com/eureka/html/gcp.html", "");
	Apps.registerApp(app, addr, "Fling", "$query", "");
	Apps.registerApp(app, addr, "TicTacToe", "http://www.gstatic.com/eureka/sample/tictactoe/tictactoe.html", "");
}

function setupRoutes(addr) {
	app.get("/ssdp/device-desc.xml", function(req, res) {
		//console.log(process.resourcesPath);
	//This is going to throw error in development because reource changes
		fs.readFile(`${process.resourcesPath}/app/device-desc.xml`, 'utf8', function (err,data) {
			console.log(data);
			data = data.replace("#uuid#", myUuid).replace("#base#","http://"+req.headers.host).replace("#name#", name);
			res.type('xml');
			res.setHeader("Access-Control-Allow-Method", "GET, POST, DELETE, OPTIONS");
			res.setHeader("Access-Control-Expose-Headers", "Location");
			res.setHeader("Application-Url", "http://"+req.headers.host+"/apps");
			res.send(data);
		});
	});

	app.post('/connection/:app', function(req, res) {
		console.log("Connecting App "+ req.params.app);

		res.setHeader("Access-Control-Allow-Method", "POST, OPTIONS");
		res.setHeader("Access-Control-Allow-Headers", "Content-Type");

		res.type("json");
		res.send(JSON.stringify({
			URL: "ws://"+addr+":8008/session/"+req.params.app+"?1",
			pingInterval: 3
		}))
	});

	app.get('/apps', function(req, res){
		for (var key in Apps.registered) {
			if(Apps.registered[key].config.state == "running") {
				console.log("Redirecting to"+ key);
				res.redirect('/apps/'+key);
				return;
			}
		}

		res.setHeader("Access-Control-Allow-Method", "GET, POST, DELETE, OPTIONS");
		res.setHeader("Access-Control-Expose-Headers", "Location");
		res.setHeader("Content-Length", "0");
		res.setHeader("Content-Type", "text/html; charset=UTF-8");
		res.send(204, "");

	});
}

function setupSSDP(addr) {
	peer.on("ready",function(){
	});

	peer.on("notify",function(headers, address){
	});

	peer.on("search",function(headers, address){
		if(headers.ST.indexOf("dial-multiscreen-org:service:dial:1") != -1) {
			peer.reply({
				LOCATION: "http://"+addr+":8008/ssdp/device-desc.xml",
				ST: "urn:dial-multiscreen-org:service:dial:1",
				"CONFIGID.UPNP.ORG": 7337,
				"BOOTID.UPNP.ORG": 7337,
				USN: "uuid:"+myUuid
			}, address);
		}
	});

	peer.start();
}
//