module Web.Apiary.Authenticate.Internal where
import Control.Applicative((<$>), (<*>))
import Control.Monad(mzero)
import Control.Monad.Trans.Resource(runResourceT)
import Control.Monad.Apiary(ApiaryT, action)
import Control.Monad.Apiary.Filter(focus)
import Control.Monad.Apiary.Action(ActionT, getRequest, redirect)
import qualified Network.Wai as Wai
import qualified Network.HTTP.Types as HTTP
import qualified Network.HTTP.Client as Client
import qualified Web.Authenticate.OpenId as OpenId
import Web.Apiary(MonadIO(..))
import Web.Apiary.Session(Session, deleteSession, setSession)
import Data.Apiary.Extension(Has, Extension)
import Data.Apiary.Compat(Proxy(Proxy), Typeable)
import Data.Apiary.Method(Method(GET))
import qualified Network.Routing as R
import qualified Data.Serialize as Serialize
import Data.Data (Data)
import Data.Maybe(mapMaybe)
import Data.Default.Class(Default(..))
import Blaze.ByteString.Builder(toByteString)
import qualified Data.ByteString.Char8 as S
import qualified Data.Text as T
import qualified Data.Text.Encoding as T
data AuthConfig = AuthConfig
{ authSuccessPage :: S.ByteString
, authUrl :: T.Text
, authPrefix :: [T.Text]
, authReturnToPath :: [T.Text]
, authLogoutPath :: [T.Text]
, providers :: [(T.Text, Provider)]
}
data Provider = Provider
{ providerUrl :: T.Text
, realm :: Maybe T.Text
, parameters :: [(T.Text, T.Text)]
}
instance Default AuthConfig where
def = AuthConfig "/" "http://localhost:3000" ["auth"] ["return_to"] ["logout"] $
[ ("google", Provider "https://www.google.com/accounts/o8/id" Nothing [])
, ("yahoo", Provider "http://me.yahoo.com/" Nothing [])
]
data Auth = Auth
{ manager :: Client.Manager
, config :: AuthConfig
}
instance Extension Auth
authHandler :: (Monad m, MonadIO actM, Has (Session OpenId actM) exts)
=> Auth -> ApiaryT exts prms actM m ()
authHandler Auth{..} = retH >> mapM_ (uncurry go) (providers config)
where
pfxPath p = focus id (Just GET) $ R.raw "" $ \d t -> do
if t == p
then return (d, [])
else mzero
retH = pfxPath (authPrefix config ++ authReturnToPath config) . action $
returnAction manager (authSuccessPage config)
go name Provider{..} = pfxPath (authPrefix config ++ [name]) . action $
authAction manager providerUrl returnTo realm parameters
returnTo = T.decodeUtf8 $ T.encodeUtf8 (authUrl config) `S.append`
toByteString (HTTP.encodePathSegments (authPrefix config ++ authReturnToPath config))
authConfig :: Auth -> AuthConfig
authConfig = config
authProviders :: Auth -> [(T.Text, Provider)]
authProviders = providers . config
authRoutes :: Auth -> [(T.Text, S.ByteString)]
authRoutes auth =
map (\(k,_) -> (k, toByteString . HTTP.encodePathSegments $ authPrefix (config auth) ++ [k])) $
providers (config auth)
authLogout :: (Has (Session OpenId m) exts, Monad m) => ActionT exts prms m ()
authLogout = deleteSession (Proxy :: Proxy OpenId)
authAction :: MonadIO m => Client.Manager -> T.Text -> T.Text
-> Maybe T.Text -> [(T.Text, T.Text)] -> ActionT exts prms m ()
authAction mgr uri returnTo realm prm = do
fw <- liftIO . runResourceT $ OpenId.getForwardUrl uri returnTo realm prm mgr
redirect $ T.encodeUtf8 fw
data OpenId_ a = OpenId_
{ opLocal :: a
, params :: [(a, a)]
, claimed :: Maybe a
} deriving (Show, Read, Eq, Ord, Data, Typeable, Functor)
instance Serialize.Serialize (OpenId_ S.ByteString) where
put (OpenId_ loc prm cld) = do
Serialize.put loc
Serialize.put prm
Serialize.put cld
get = OpenId_ <$> Serialize.get <*> Serialize.get <*> Serialize.get
instance Serialize.Serialize (OpenId_ T.Text) where
get = fmap (fmap T.decodeUtf8) Serialize.get
put = Serialize.put . fmap T.encodeUtf8
type OpenId = OpenId_ T.Text
toOpenId :: OpenId.OpenIdResponse -> OpenId
toOpenId r = OpenId_
(OpenId.identifier $ OpenId.oirOpLocal r)
(OpenId.oirParams r)
(OpenId.identifier <$> OpenId.oirClaimed r)
returnAction :: (MonadIO m, Has (Session OpenId m) exts)
=> Client.Manager -> S.ByteString -> ActionT exts prms m ()
returnAction mgr to = do
q <- Wai.queryString <$> getRequest
r <- liftIO . runResourceT $ OpenId.authenticateClaimed (mapMaybe queryElem q) mgr
setSession Proxy (toOpenId r)
redirect to
where
queryElem (_, Nothing) = Nothing
queryElem (k, Just v) = Just (T.decodeUtf8 k, T.decodeUtf8 v)