74 lines
2.8 KiB
Haskell
74 lines
2.8 KiB
Haskell
{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE PatternGuards #-}
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{-# LANGUAGE RankNTypes #-}
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{-# LANGUAGE RecordWildCards #-}
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{-# LANGUAGE TemplateHaskell #-}
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module Yesod.Core.Internal.Response where
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import Blaze.ByteString.Builder (toByteString)
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import Data.ByteString (ByteString)
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import qualified Data.ByteString as S
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import qualified Data.ByteString.Char8 as S8
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import Data.CaseInsensitive (CI)
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import qualified Data.CaseInsensitive as CI
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import Network.Wai
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import Prelude hiding (catch)
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import Web.Cookie (renderSetCookie)
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import Yesod.Core.Content
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import Yesod.Core.Types
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import qualified Network.HTTP.Types as H
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import qualified Data.Text as T
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import Control.Exception (SomeException, handle)
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import Blaze.ByteString.Builder (fromLazyByteString,
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toLazyByteString)
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import qualified Data.ByteString.Lazy as L
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yarToResponse :: YesodResponse -> [(CI ByteString, ByteString)] -> Response
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yarToResponse (YRWai a) _ = a
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yarToResponse (YRPlain s hs _ c _) extraHeaders =
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go c
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where
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finalHeaders = extraHeaders ++ map headerToPair hs
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finalHeaders' len = ("Content-Length", S8.pack $ show len)
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: finalHeaders
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go (ContentBuilder b mlen) =
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ResponseBuilder s hs' b
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where
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hs' = maybe finalHeaders finalHeaders' mlen
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go (ContentFile fp p) = ResponseFile s finalHeaders fp p
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go (ContentSource body) = ResponseSource s finalHeaders body
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go (ContentDontEvaluate c') = go c'
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-- | Convert Header to a key/value pair.
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headerToPair :: Header
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-> (CI ByteString, ByteString)
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headerToPair (AddCookie sc) =
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("Set-Cookie", toByteString $ renderSetCookie $ sc)
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headerToPair (DeleteCookie key path) =
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( "Set-Cookie"
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, S.concat
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[ key
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, "=; path="
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, path
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, "; expires=Thu, 01-Jan-1970 00:00:00 GMT"
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]
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)
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headerToPair (Header key value) = (CI.mk key, value)
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evaluateContent :: Content -> IO (Either ErrorResponse Content)
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evaluateContent (ContentBuilder b mlen) = handle f $ do
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let lbs = toLazyByteString b
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L.length lbs `seq` return (Right $ ContentBuilder (fromLazyByteString lbs) mlen)
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where
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f :: SomeException -> IO (Either ErrorResponse Content)
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f = return . Left . InternalError . T.pack . show
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evaluateContent c = return (Right c)
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getStatus :: ErrorResponse -> H.Status
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getStatus NotFound = H.status404
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getStatus (InternalError _) = H.status500
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getStatus (InvalidArgs _) = H.status400
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getStatus (PermissionDenied _) = H.status403
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getStatus (BadMethod _) = H.status405
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