index.js

var app = require('express')()
var http = require('http').createServer(app)
var io = require('socket.io')(http)
var redis = require('redis')

app.get('/', function(req, res){
    res.sendFile(__dirname + '/index.html')
})

io.on('connection', function(socket){
    console.log('a user connected')
    var redisClient = redis.createClient()
    redisClient.subscribe('message')

    // handle message
    redisClient.on('message', function(channel, message){
      console.log('new message in queue ' + message + " channel")
      socket.emit(channel, message)
    })

    socket.on('disconnect', function(){
        console.log('user disconnected')
    })

    socket.on('chat message', function(msg){
        io.emit('chat message', msg)
    })
})

http.listen(3000, function(){
    console.log('listening on *:3000')
})