$ git clone git://github.com/gr2m/CORS-Proxy.git
$ cd CORS-proxy
$ npm install .
$ node server.js
The cors proxy will start at http://localhost:9292. To access another domain, use the domain name (including port) as the first folder, e.g.
http://localhost:9292/localhost:3000/sign_in
http://localhost:9292/my.domain.com/path/to/resource
etc etc