Socket.io send/emit with Callback

[BlackHornet]

Hi,

first of all: Wonderful Socket.IO framework :)

But I still have a small request, I wonder how to realize the best, maybe it's on your agenda, or you have other ideas how to solve this (if technically not possible):

referring http://socket.io/#how-to-use there is something called callbacks (definable within a send or emit):

Sending and getting data (acknowledgements). Sometimes, you might want to get a callback when the client confirmed the message reception.
To do this, simply pass a function as the last parameter of `.send` or `.emit`. What's more, when you use `.emit`, the acknowledgement is done by you, which means you can also pass data along: SERVER

var io = require('socket.io').listen(80);

io.sockets.on('connection', function (socket) {
  socket.on('ferret', function (name, fn) {
    fn('woot');
  });
});

CLIENT

  var socket = io.connect(); // TIP: .connect with no args does auto-discovery
  socket.on('connect', function () { // TIP: you can avoid listening on `connect` and listen on events directly too!
    socket.emit('ferret', 'tobi', function (data) {
      console.log(data); // data will be 'woot'
    });
  });

Is this somehow possible?

Kind regards
BlackHornet

[snehasis]

Is there anyone have answer for this ? the Event call back is not working when using it like below.
SIOClient *sio = SIOClient::connect("http://192.168.1.231:3001");
TestTarget *target = new TestTarget();

sio->on("connect", target, callback(&TestTarget::ontestevent));
sio->on("testevent", target, callback(&TestTarget::ontestevent));
sio->emit("testevent","[{"username":"demo","password":"demo"}]");

Please how can I receive callback response from the server ?