Socket.io doesn't set CORS header(s)

Question

I know this question has been asked a couple of times. However, I can't get any those solutions to work. I'm running a standard install of node.js and socket.io. (From yum on Amazon EC2) The problem is that Chrome is falling back to xhr polling, and those requests require a working CORS configuration. However, I can't seem to get it to work. My web server is running on port 80, and node.js(socket.io) is running on port 81. I have tried to get socket.io to use a origin policy as you can see. I have also tried to use "* : *" as origin with no luck. Here's my code: ``` var http = require('http'); var io = require('socket.io').listen(81, {origins: '*'}); io.configure( function(){ io.set('origin', '*'); }); io.set("origins","*"); var server = http.createServer(function(req, res) { io.sockets.emit("message", "test"); res.writeHead(200); res.end('Hello Http'); console.log("Message recieved!"); }); server.listen(82); io.sockets.on('connection', function(client) { console.log("New Connection")…

Accepted Answer

This is the syntax I had to use to get CORS working with socket.io:

```
io.set( 'origins', '*domain.com*:*' );
```

If it comes to it, use `console.log` to make sure you're entering this block of code in `Manager.prototype.handleHandshake` inside `./lib/manager.js`:

```
 if (origin) {
    // https://developer.mozilla.org/En/HTTP_Access_Control
    headers['Access-Control-Allow-Origin'] = '*';

if (req.headers.cookie) {
      headers['Access-Control-Allow-Credentials'] = 'true';
    }
  }
```

Socket.io doesn't set CORS header(s)

Solution

Problem