gistfile1.js

/*
	Setup a server, RTC and face tracking
 
	Install opencv
		brew install opencv
	NPM
		https://www.npmjs.org/package/fs
		https://www.npmjs.org/package/http
		https://www.npmjs.org/package/express
		https://www.npmjs.org/package/socket.io
		https://www.npmjs.org/package/opencv
*/
var APP = {
 
	// include some scripts
	server: null,
	port: 3000,
	express: require('express'),
	app: null,
	mdb: require('mongodb'),
	dbUrl: 'mongodb://127.0.0.1:27017/test',
	db: null,
	io: null,
	cv: require('opencv'),
	fs: require("fs"),
 
	init: function (){
 
		// connect stuff up
		APP.app = APP.express();
		APP.server = require('http').createServer(APP.app).listen(APP.port, '0.0.0.0');
		APP.io = require('socket.io').listen(APP.server);
 
		// http routing
		APP.routing();
 
		// connect the websocket
		APP.io.on('connection', function (socket){
 
			console.log('Server started on port ' + APP.port);
			APP.main(socket);
 
		});
 
	},
 
	// open the db
	openDB: function (){
 
		APP.mdb.connect(APP.dbURL, function(err, db){
 
			if(err)
				throw err;
 
			APP.db = db;
 
		});
 
	},
 
	// close the db
	closeDB: function (){
		
		APP.db.close();
 
	},
 
	// insert a file to the db
	dbInsert: function (col, data){
 
		// open the db
		APP.openDB();
 
		var collection = APP.db.collection(col);
		collection.insert(data, function(err, docs){
			if(err){
				console.warn(err.message);
			} else {
				console.log('Successfully inserted record');
			}
		});
 
		// close the db
		APP.closeDB();
 
	},
 
	// insert a file to the db
	dbUpdate: function (col, crit, data){
 
		// open the db
		APP.openDB();
 
		var collection = APP.db.collection(col);
		collection.update(crit, {$set: {hi: 'there'}}, {w:1}, function (){
			if(err){
				console.warn(err.message);
			} else {
				console.log('Successfully updated record');
			}
		});
 
		// close the db
		APP.closeDB();
 
	},
 
	// find a file in the db
	dbFind: function (col){
 
		// open the db
		APP.openDB();
 
		var collection = APP.db.collection(col);
		collection.find().toArray(function(err, results) {
			console.dir(results);
		});
 
		// close the db
		APP.closeDB();
 
	},
 
	// routing files
	routing: function (){
		
		// set directory to use for files prefixed with /library
		APP.app.use('/library', APP.express.static(__dirname + '/library'));
 
		// index page
		APP.app.get('/*', function (req, res){
			
			// get query
			// console.log(req.query);
 
			// get file
			res.sendfile(__dirname + '/' + req.route.params);
 
		});
		
	},
 
	main: function (socket){ // you was missing the socket here
 
		// setInterval(function (){
		// 	APP.io.sockets.emit('put_down', {'fingers': 's'});
		// }, 5000);
 
        // need to liston to the socket, not to the Socket.io library
		socket.on('update', function (data) {
 
			console.log(data);
 
			// create the file
			var filename = './file' + data.count + '.png';
			APP.fs.writeFile(filename, data.imgData, 'base64', function(err) {
				console.log(err);
			});
 
			APP.cv.readImage(filename, function(err, im){
				
				im.detectObject(APP.cv.FACE_CASCADE, {}, function(err, faces){
					
					for (var i=0;i<faces.length; i++){
						var x = faces[i];
						im.ellipse(x.x + x.width/2, x.y + x.height/2, x.width/2, x.height/2);
					}
 
					im.save(filename);
 
				});
 
			});
 
		});
 
	}
 
};
 
// run the script
APP.init();