Send custom data along with handshakeData in socket.io?

Question

So I have an application running node js with socket.io as a backend and normal javascript as frontend. My application has a login system which currently simply has the clie

Answer 1

For socket.io v1.2.1 use this:

io.use(function (socket, next) {
  var handshake = socket.handshake;
  console.log(handshake.query);
  next();
});