Express.IO connection keeps failing with HTTP 500

Question

I'm using Express.IO and This iOS Client trying to create a basic socket example but I can't seem to be able to connect.

I tried everything I could possibly find on google but everytime my client tries connecting I get the following error:

2013-08-12 14:48:42.628 SocketIOTest[59835:c07] ERROR: handshake failed ... Could not connect to the server. 2013-08-12 14:48:42.628 SocketIOTest[59835:c07] OnError: Error Domain=NSURLErrorDomain Code=-1004 "Could not connect to the server." UserInfo=0x7594570 {NSErrorFailingURLStringKey=http://localhost:7076/socket.io/1/?t=16807, NSErrorFailingURLKey=http://localhost:7076/socket.io/1/?t=16807, NSLocalizedDescription=Could not connect to the server., NSUnderlyingError=0x10967bb0 "Could not connect to the server."}

When I go to http://localhost:7076/socket.io/1/?t=16807 in my browser I get this response: ttIwyz7Tw6uFjp00WceI:60:60:websocket,htmlfile,xhr-polling,jsonp-polling

But for some reason when checking with header tools, it actually does return an HTTP 500 error. I'm really not sure why.

Here's my Node code:

#!/usr/bin/env node

var express     = require('express.io');
var app         = express().http().io();
var redisStore  = require('connect-redis')(express);

app.use(express.cookieParser());
app.use(express.session({
                            store:  new redisStore({
                                        host:   '192.168.33.10',
                                        port:   6386
                                    }),
                            secret: 'A>mVt*Cx87Kq^9:3}am$q67JYtGGAl'
                        })) ;

app.use(function(err, req, res, next){
    response.header('Access-Control-Allow-Origin', '*');
    response.header('Access-Control-Allow-Methods', 'POST, GET, PUT, DELETE, OPTIONS');
    response.header('Access-Control-Allow-Credentials', 'true');
    response.header('Access-Control-Allow-Headers', 'Content-Type, Accept, Origin, Cookie');
    next();
});

app.set( 'origins', '*' );

app.io.on('connection', function (socket) {
    console.log("connection");
    socket.emit('news', { hello: 'world' });
});

app.listen(7076);
console.log('App API Server is listening on port 7076');

Would appreciate any help on this.

Answer 1

it seems that you are referring to localhost: NSErrorFailingURLStringKey=http://localhost:7076/socket.io/1/?t=16807 in your IOS client, while the node.js server is running on some external Linux box. Try connecting to the server instead.