Offline access using facebooker plugin

If I use Offline Access on my rhtml page in rails application, how can I get the infinite session key from facebook? so that I can store it in the database & from onward users on my website do not need to connect to facebook again?

I'm using facebooker plugin in my rails application.

Please h开发者_如何学Pythonelp.

Here you go: http://modelix.net/2009/09/facebook-connect-working-with-offline-users-data-access/