mkdynamic/omniauth-facebook — Issue #23: Support Facebook's new offline_access paradigm
Author: jonhyman
Created: 2012-01-23 17:15:18+00:00
State: open

It looks like Facebook started deprecating offline_access as of Friday the 20th:

https://developers.facebook.com/docs/offline-access-deprecation/

OAuth tokens can now be exchanged via arguments passed to Facebook:

https://graph.facebook.com/oauth/access_token?
client_id=APP_ID&
client_secret=APP_SECRET&
grant_type=fb_exchange_token&
fb_exchange_token=EXISTING_ACCESS_TOKEN