server.js

/** CONFIGURATION **/

HOST = "http://tapit.nodejitsu.com"
//HOST = "http://192.168.1.105"
PORT = "80"

/** CONFIGURATION **/

var express = require('express')
  , app = express.createServer()
  , redis = require('redis')
  , io = require('socket.io').listen(app);

io.set('log level', 10); // reduce logging

app.use(express.bodyParser());
app.use(express.static(__dirname + '/public'));
app.set('view engine', 'jade');

app.listen(PORT);

var DB = redis.createClient(6379, 'nodejitsudb6981647929.redis.irstack.com');
DB.auth('nodejitsudb6981647929.redis.irstack.com:f327cfe980c971946e80b8e975fbebb4', function (err) {
  if (err) { throw err; }
    // You are now connected to your redis.
});

app.get('/', function(req, res) {
  res.render('index');
});

app.get('/games/new', function (req, res) {
  data = { HOST: HOST, PORT: PORT,
          gameid: Math.random().toString(36).substring(12) 
  }

  // Create the game in DB
  DB.sadd('games', data['gameid']);
  res.render('games/new', data);
});

app.get('/game/:gameid/start', function(req, res) {
  data = { gameid: req.params.gameid }
  res.render('games/start', data);
});

app.post('/game/:gameid/join', function (req, res) {
  DB.sismember('games', req.params.gameid, function(err, data) {

    // Game Not found
    if (!data) return res.send(404);

    // Strip special characters
    nick = req.body.nick.replace(/\W/g, '')
    DB.sismember(req.params.gameid, nick, function(err, data) {
      // Add the new member to the game
      DB.sadd(req.params.gameid, nick);
      params = { HOST: HOST, PORT: PORT,
                gameid: req.params.gameid,
                nick: nick,
                ts: Date.now()
      }
      res.render('games/join', params);
    });
  });
});

io.sockets.on('connection', function(socket) {
  const subscribe = redis.createClient(6379, 'nodejitsudb6981647929.redis.irstack.com');
  subscribe.auth('nodejitsudb6981647929.redis.irstack.com:f327cfe980c971946e80b8e975fbebb4', function (err) {
  if (err) { throw err; }
    // You are now connected to your redis.
  });

  const publish = redis.createClient(6379, 'nodejitsudb6981647929.redis.irstack.com');
  publish.auth('nodejitsudb6981647929.redis.irstack.com:f327cfe980c971946e80b8e975fbebb4', function (err) {
  if (err) { throw err; }
    // You are now connected to your redis.
  });

  socket.on('publish', function(channel, data) {
    publish.publish(channel, data);
  });

  socket.on('psubscribe', function(channel) {
    subscribe.psubscribe(channel);
  });

  subscribe.on("pmessage", function(pattern, channel, message) {
    socket.emit('message', { channel: channel, data:  message });
  });

});