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fmapRouter.

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This commit is contained in:
Matthias Fischmann 2015-10-12 17:06:43 +02:00
parent 80396c8e47
commit 96f10add65
1 changed files with 8 additions and 2 deletions
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10
servant-server/src/Servant/Server/Internal/Router.hs
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@ -4,7 +4,7 @@ import Data.Map (Map)
import qualified Data.Map as M
import Data.Monoid ((<>))
import Data.Text (Text)
import Network.Wai (Request, pathInfo)
import Network.Wai (Request, Response, pathInfo)
import Servant.Server.Internal.PathInfo
import Servant.Server.Internal.RoutingApplication
@ -21,6 +21,13 @@ data Router =
| Choice Router Router
-- ^ left-biased choice between two routers
fmapRouter :: (RouteResult Response -> RouteResult Response) -> Router -> Router
fmapRouter f (LeafRouter a) = LeafRouter $ \req cont -> a req (cont . f)
fmapRouter f (StaticRouter m) = StaticRouter (fmapRouter f <$> m)
fmapRouter f (DynamicRouter d) = DynamicRouter (fmapRouter f <$> d)
fmapRouter f (Choice r1 r2) = Choice (fmapRouter f r1) (fmapRouter f r2)
fmapRouter f (WithRequest g) = WithRequest (fmapRouter f . g)
-- | Smart constructor for the choice between routers.
-- We currently optimize the following cases:
--
@ -69,4 +76,3 @@ runRouter (Choice r1 r2) request respond =
then runRouter r2 request $ \ mResponse2 ->
respond (mResponse1 <> mResponse2)
else respond mResponse1