app.js

var express = require('express'),
	expressLess = require('express-less'),
	http = require('http'),
	util = require('util'),
	path = require('path'),
	compression = require('compression'),
	RED = require("node-red");

var fs = require('fs');
var bodyParser = require('body-parser');

// create a new express server
var app = express();

// Create a server
var server = http.createServer(app)

app.use(compression({
	filter: shouldCompress
}))

function shouldCompress(req, res) {
	if (req.headers['x-no-compression']) {
		// don't compress responses with this request header 
		return false
	}
	// fallback to standard filter function 
	return compression.filter(req, res)
}

app.use(express.static(path.join(__dirname, 'public')))

app.use('/less/stylesheets/*', function (req, res, next) {
	var url = req.originalUrl;
	var relativePath = url.replace("less/stylesheets/", "");
	var lessCSSFile = './public' + relativePath;
	req.url = lessCSSFile;
	var expressLessObj = expressLess(__dirname, {
		compress: true
	});
	expressLessObj(req, res, next);
});

app.use(require('cookie-parser')());
app.use(bodyParser.urlencoded({
	extended: true
}));
app.use(bodyParser.json({
	limit: '20mb'
}));
app.use(require('express-session')({
	secret: 'keyboard cat'
}));

// Create the settings object - see default settings.js file for other options
var settings = {
	httpAdminRoot: "/red",
	httpNodeRoot: "/red-api",
	userDir: __dirname + '/nodered/',
	flowFile: "filament_mldemo.json",
	functionGlobalContext: {
		moment: require("moment"),
		momentWeekDay: require("moment-weekday-calc")
	} // enables global context
};

// Initialise the runtime with a server and settings
RED.init(server, settings);

// Serve the editor UI from /red
app.use(settings.httpAdminRoot, RED.httpAdmin);

// Serve the http nodes UI from /api
app.use(settings.httpNodeRoot, RED.httpNode);

// This route deals enables HTML5Mode by forwarding missing files to the index.html
app.use('/', function (req, res, next) {
	res.sendfile('./public/index.html');
});

var port = (process.env.VCAP_APP_PORT || 7007);

// start server on the specified port and binding host
server.listen(port, function () {
	// print a message when the server starts listening
	console.log("server starting on port " + port);

	// Start the runtime
	RED.start();
});