Backbone.js - Simple CORS echo server

I'm trying to learn Backbone.js and thus follow tutorials.

In particular, I'm following a tutorial by Thomas David (founder of Backbone Tutorials).

The problem is that the basic server he gives on his GitHub doesn't work.

So my question is the following :

• Does anyone have a bare-bone Node.js CORS-enabled echo server that could work with Backbone.js ?

I only want the server to be able to answer certain requests with JSON strings (like a REST server) so that I can concentrate on learning Backbone.js.

Thanks in advance !