How to send binary data with socket.io?

Finally I have it working with JS and Android ( Java ), so I decided to share it with you guys.

Let's start with the Server Code: (Node js)

var http = require('http');var app = http.createServer(function ejecute(request, response){});var io = require('socket.io').listen(app);io.on('connection', function(socket) {        socket.on('message', function(data){            console.log("recieved data:");            console.log(data);            var bufArr = new ArrayBuffer(4);            var bufView = new Uint8Array(bufArr);            bufView[0]=6;            bufView[1]=7;            bufView[2]=8;            bufView[3]=9;            socket.emit('message',bufArr);        });    });app.listen(3000);

Lets jump on to the Javascript client

  var socket = io("http://localhost:3000");  socket.emit('message', 'hola from js client');  socket.on('message', function(msg){    var bufView = new Uint8Array(msg);    console.log(msg)  });

And finally, let's show the Android (java) client:

    final Socket socket = IO.socket("http://localhost:3000",opts);    socket.on(Socket.EVENT_CONNECT, new Emitter.Listener() {        @Override        public void call(Object... args) {            socket.emit("message","hello from java");        }    });    socket.on("message", new Emitter.Listener() {        @Override        public void call(Object... args) {            byte[] bytearray = (byte[])args[0]; //received bytes            for  (byte b : bytearray) {                System.out.println("byte"+b);            }        }    });   socket.on(Socket.EVENT_DISCONNECT, new Emitter.Listener() {    @Override    public void call(Object... args) {}});

I hope it is useful to you all.Cheers!