why does socket.io error 500 with express.io? - socket.io

Question

Why does socket.io now give 500 (Internal Server Error) with express.io??
client side:
$(document).ready(function(){
$.getScript("http://www.mysite.com:8000/socket.io/socket.io.js",function(){
var socket = io.connect('http://www.mysite.com:8000'); //<<--error
socket.emit('ready');
});});
server side:
var express = require('express.io')
, engine = express().http().io();
engine.use(express.cookieParser());
engine.use(express.session({secret:'monkey'}));
engine.all('/',function(req,res,next){res.header("Access-Control-Allow-Origin","*");res.header("Access-Control-Allow-Headers","X-Requested-With");next();});
engine.get('/', function(req, res) {
req.session.loginDate = new Date().toString()
res.sendfile(__dirname)
});
engine.listen(8000);
engine.io.route('ready',function(socket){console.log('hellooooooooooo');});
I am following the docs on https://github.com/techpines/express.io, I have only changed two things: cross domain and app is called engine instead. I just can't see the problem Has anyone else got this to work?
Note: it's not using express.js it's using express.io (more compatable with socket.io)
It's like socket.io is not their listening on the server even though engine = express().http().io(); io is socket.io

Answer 1

I faced a similar problem, but I fixed it by copying and pasting the code sample in express.io sample code, and it worked. Then I compared them to check what the problem could be and observed that order of the code matters.
This order results in an error:
static
cookieParser
session
But when I followed the code provided in the sample code, I found out that this order works:
cookieParser
session
static
Hopefully this will also help you.

Answer 2

I believe the posted example is failing because you're using the call res.sendfile(__dirname) without supplying a filename.
This is coming from express.io, notice it uses res.sendfile(__dirname + '/client.html'):
express = require('express.io')
app = express().http().io()
// Setup your sessions, just like normal.
app.use(express.cookieParser())
app.use(express.session({secret: 'monkey'}))
// Session is automatically setup on initial request.
app.get('/', function(req, res) {
req.session.loginDate = new Date().toString()
res.sendfile(__dirname + '/client.html')
})