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

Perhaps the api has changed but I did the following to get extra info to the server.

// client
io.connect('localhost:8080', { query: 'foo=bar', extra: 'extra'});

// server
io.use(function(sock, next) {
  var handshakeData = sock.request;
  console.log('_query:', handshakeData._query);
  console.log('extra:', handshakeData.extra);
  next();
});

prints

_query: { foo: 'bar',
  EIO: '3',
  transport: 'polling',
  t: '1424932455409-0' }
extra: undefined

If anyone knows how to get data from a client to the server through the handshake that is not in the query params let me know please.

Update I ran into issues later with this syntax

io.connect('localhost:8080?foo=bar');

is what I'm currently using.