app.js

// environments
var local_redis = process.platform == 'win32' ? '192.168.6.167' : '127.0.0.1';
var ENV = {
    redis : { host: local_redis, port: 6379 }, // 192.168.6.131
    db    : 'mongodb://settlersOfAsia:comp361@ds033116.mlab.com:33116/settlers' // mlab.com
};


// dependencies
var port        = Number(process.env.PORT || 3000);
var http        = require('http');
var mongoose    = require('mongoose');
var express     = require('express');
var Session     = require('express-session');
var bodyParser  = require('body-parser');
var redis       = require('redis');
var app         = express();
var server      = http.createServer(app);
var socketio 	= require('socket.io');
var ios 		= require('socket.io-express-session');



// create a redis client
global.MyRedis = redis.createClient(ENV.redis.port, ENV.redis.host);
MyRedis.on("error", function(err) {
    console.error("REDIS ERROR:", err);
});


// use redis for session
var RedisStore = require('connect-redis')(Session);
var sessionConfig = Session({
  store: new RedisStore({ client: MyRedis }),
  key: 'jsessionid',
  secret: 'secret sauce',
  saveUninitialized: false, // don't create session until something stored; however, this will create a temporary session that last for the duration of the request
  resave: false, // don't save session if unmodified
  cookie: { secure: false, maxAge: 365*24*60*60*1000 }, // session expires in 1 year
  rolling: true // any subsequential request resets the maxAge
});


// HTTP middlewares
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
app.use(express.static(__dirname + '/public'));
app.use(sessionConfig);

// database
mongoose.connect(ENV.db);


// socket.io
var io = socketio(server);
var socketUser = require('./server/middleware/socketUser.js');
io.use(ios(sessionConfig));
io.use(socketUser); // access user object from socket.user
global.io = io;


// routes
require('./server/routes.js')(app); // file fetching
require('./server/rest.js')(app); // all ajax request
require('./server/game.js'); // game


// start the server
server.listen(port, function() {
    console.log('SERVER STARTED ON PORT:', port);
    console.log('PROCESS PID:', process.pid);
});