sockerserver.js

var redis = require('redis');
var app = require('http').createServer();

io = require('socket.io').listen(app);

app.listen(8080);
io.sockets.on('connection', function (socket) {

    const subscribe = redis.createClient(undefined, "redis.demos.cloud.linnovate.net")
    const pub = redis.createClient(undefined, "redis.demos.cloud.linnovate.net")

   /**
    * Connect to redis channel and I trigger init event
    */
   socket.on("subscribe", function (channel) {
        subscribe.subscribe(channel);
        console.log('channel' + channel);
        socket.emit("init", "woww");
    });

    /**
     * Goodbye redis pub/sub!
     */
    socket.on('unsubscribe', function (obj) {
        subscribe.unsubscribe(obj.channel);
    });

    /*
     * Redis use subcribe on for send new message in a channel
     */
    subscribe.on("message", function (channel, data) {
        /*
         *  Socket.io use send function for trigger an event into default channel 'message'
         */
        socket.send(data);
    });
});