Yesod.Facebook

Running FacebookT actions inside GHandler

class Yesod master => YesodFacebook master where

The YesodFacebook class for foundation datatypes that support running FacebookT actions.

Methods

fbCredentials :: master -> Credentials

The credentials of your app.

fbHttpManager :: master -> Manager

HTTP manager used for contacting Facebook (may be the same as the one used for yesod-auth).

runFacebookT :: YesodFacebook master => FacebookT Auth (GHandler sub master) a -> GHandler sub master a

Run a FacebookT action inside a GHandler using your credentials.

runNoAuthFacebookT :: YesodFacebook master => FacebookT NoAuth (GHandler sub master) a -> GHandler sub master a

Run a FacebookT action inside a GHandler without using your credentials. Usually you won't need to use this function but it's provided for completeness' sake.

getFbCredentials :: YesodFacebook master => GHandler sub master Credentials

Returns Facebook's Credentials from inside a GHandler. Just a convenience wrapper around fbCredentials.

Real-time update notifications

parseRealTimeUpdateNotifications :: (YesodFacebook master, FromJSON a) => GHandler sub master (RealTimeUpdateNotification a)

Same as getRealTimeUpdateNotifications but does the heavy-lifting for you. Throws an exception whenever any step fails (signature header not found, invalid signature, invalid JSON).

answerRealTimeUpdateChallenge :: RealTimeUpdateToken -> GHandler sub master RepPlain

Answer Facebook's challenge if the RealTimeUpdateToken matches.

Whenever you modify your subscriptions, Facebook will try to contact your server with the RealTimeUpdateToken that you gave on your call to modifySubscription. This function will correctly answer Facebook's challenge if the RealTimeUpdateToken matches, otherwise it will return notFound.