This demo showcases the qooxdoo REST wrapper with the aid of the GitHub OAuth2 implementation and the GitHub Gists API. The requirements to run it is that you have a GitHub account with gists associated with it.
This demo is not expected to run in the context of the demo browser because it needs a backend component (a php file). For a working example, please open the hosted REST demo application. You will be asked to login to GitHub (if not already logged in) and grant the "qx-gists" application access to your public gists.
The GitHub demo application is included in the SDK (under /application/github). Please see the comments in the index.php file to customize it to your environment.