Serverside client transport detection for Socket.io

detect.client.socket.io.js

require.paths.unshift('/usr/local/lib/node/socket.io/lib/socket.io/transports');
var htmlfile = require('htmlfile')
  , flashsocket = require('flashsocket')
  , jsonppolling = require('jsonp-polling')
  , websocket = require('websocket')
  , xhrmultipart = require('xhr-multipart')
  , xhrpolling = require('xhr-polling');

var http = require('http')
  , io = require('socket.io');
  
var app = http.createServer(function(req, res){
  res.writeHead(200);
  res.write('<script type="text/javascript" src="/socket.io/socket.io.js"></script>');
  res.write('<script type="text/javascript">var socket = new io.Socket(); socket.connect();</script>');
  res.end('<script type="text/javascript">document.write("Connecting using: " + socket.transport.type );</script>');
});
app.listen(8080)

var socket = io.listen(app);
socket.on('connection', function(client){
  console.log( "websocket: " + (client instanceof websocket));
  console.log( "htmlfile: " + (client instanceof htmlfile));
  console.log( "flashsocket: " + (client instanceof flashsocket));
  console.log( "jsonppolling: " + (client instanceof jsonppolling));
  console.log( "xhrmultipart: " + (client instanceof xhrmultipart));
  console.log( "xhrpolling: " + (client instanceof xhrpolling));
});