I'm working on a Sencha Touch app that will be accessed from a web server as opposed to running native on a device. The apps URL will be called by another app that provides single sign on for various other apps using Siteminder. The app provides the user a list of applications they have access to. After the user has been authenticated with Siteminder my app is launched and the SSO app passes the authenticated user id (header SM_USER) in the HTTP Headers.

Is there a way to read these headers from my Sencha Touch app; maybe in the app launch function?