Djangofb Middleware does this work? what is FACEBOOK_INTERNAL?

[udox]

Trying to make first Facebook app, with PyFacebook. Got as far as loading a simple canvas.fbml

The middleware doesn't seem to work, I am not getting any of the data posted from fb server being attached to request.facebook object

Looking at the middleware code it has this:
def init(self, api_key=None, secret_key=None, app_name=None,
callback_path=None, internal=None, app_id=None,
oauth2=None, oauth2_redirect=None):

but the django docs explicitly say that middleware can't be initialised with arguments... is there some trickery somewhere?

a few lines down we have:
self.internal = internal or getattr(settings, 'FACEBOOK_INTERNAL', True)

this is always True, unless you explicitly set False via settings.py ...what is this property for?

then in process_request we have:
if not self.internal:
if 'fb_sig_session_key' in request.GET and ('fb_sig_user' in request.GET or 'fb_sig_canvas_user' in request.GET):
request.facebook.session_key = request.session['facebook_session_key'] = request.GET['fb_sig_session_key']
request.facebook.uid = request.session['facebook_user_id'] = request.GET['fb_sig_user'] or request.GET['fb_sig_canvas_user']

this never runs unless you set FACEBOOK_INTERNAL=False
and besides, Facebook are POSTing the data to us rather than GET

Am I missing the point here? It seems like this code doesn't do what it's supposed to.

[udox]

ok, I see decorator_from_middleware_with_args will __init__ a middleware class with args

what's the internal flag for? and how about the GET/POST discrepancy?