@@ -1,5 +1,5 @@
11{-# LANGUAGE OverloadedStrings #-}
2−module Network.Wai.Middleware.Vhost (vhost, redirectWWW) where
2+module Network.Wai.Middleware.Vhost (vhost, redirectWWW, redirectTo, redirectLogged) where
33
44import Network.Wai
55
@@ -7,6 +7,7 @@ import Network.HTTP.Types as H
77import qualified Data.Text.Encoding as TE
88import Data.Text (Text)
99import qualified Data.ByteString as BS
10+import Data.Monoid (mappend)
1011
1112vhost :: [(Request -> Bool, Application)] -> Application -> Application
1213vhost vhosts def req =
@@ -15,9 +16,20 @@ vhost vhosts def req =
1516 (_, app):_ -> app req
1617
1718redirectWWW :: Text -> Application -> Application -- W.MiddleWare
18−redirectWWW home app req =
19− if maybe True (BS.isPrefixOf "www") $ lookup "host" $ requestHeaders req
20− then return $ responseLBS H.status301
21− [ ("Content-Type", "text/plain") , ("Location", TE.encodeUtf8 home) ] "Redirect"
19+redirectWWW home =
20+ redirectIf home (maybe True (BS.isPrefixOf "www") . lookup "host" . requestHeaders)
21+
22+redirectIf :: Text -> (Request -> Bool) -> Application -> Application
23+redirectIf home cond app req =
24+ if cond req
25+ then return $ redirectTo $ TE.encodeUtf8 home
2226 else app req
2327
28+redirectTo :: BS.ByteString -> Response
29+redirectTo location = responseLBS H.status301
30+ [ ("Content-Type", "text/plain") , ("Location", location) ] "Redirect"
31+
32+redirectToLogged :: (Text -> IO ()) -> BS.ByteString -> IO Response
33+redirectToLogged logger loc = do
34+ logger $ "redirecting to: " `mappend` TE.decodeUtf8 loc
35+ return $ redirectTo loc