X-Git-Url: http://git.cielonegro.org/gitweb.cgi?p=Lucu.git;a=blobdiff_plain;f=Network%2FHTTP%2FLucu%2FInteraction.hs;h=d36c4d1773d4ebcaad2cf2937d5ce0fcddf716b0;hp=88cded5c339209fc2f1d023a50c28318747ca4fa;hb=b5dc373;hpb=46f1b85674e45e823f5b6c7a1f87b1faf8172b85 diff --git a/Network/HTTP/Lucu/Interaction.hs b/Network/HTTP/Lucu/Interaction.hs index 88cded5..d36c4d1 100644 --- a/Network/HTTP/Lucu/Interaction.hs +++ b/Network/HTTP/Lucu/Interaction.hs @@ -1,174 +1,255 @@ --- #hide +{-# LANGUAGE + CPP + , DeriveDataTypeable + , ExistentialQuantification + , OverloadedStrings + , RecordWildCards + , UnicodeSyntax + #-} module Network.HTTP.Lucu.Interaction ( Interaction(..) - , InteractionState(..) - , InteractionQueue - , newInteractionQueue - , newInteraction - , defaultPageContentType - - , writeItr - , readItr - , readItrF - , updateItr - , updateItrF - ) - where - -import Control.Concurrent.STM -import qualified Data.ByteString.Lazy.Char8 as B -import Data.ByteString.Lazy.Char8 (ByteString) -import qualified Data.Sequence as S -import Data.Sequence (Seq) -import Network -import Network.HTTP.Lucu.Config -import Network.HTTP.Lucu.HttpVersion -import Network.HTTP.Lucu.Request -import Network.HTTP.Lucu.Response - -data Interaction = Interaction { - itrConfig :: Config - , itrRemoteHost :: HostName - , itrResourcePath :: Maybe [String] - , itrRequest :: TVar (Maybe Request) - , itrResponse :: TVar Response - - -- FIXME: この三つは本來 TVar であるべきでないので、唯の Bool にす - -- るに越した事は無いが、それは重要でない。そんな golf で自分の貴重 - -- な時間を /dev/null に突っ込むのは、他にしたい事が何も無くなって - -- からにすべき。 - , itrRequestHasBody :: TVar Bool - , itrRequestIsChunked :: TVar Bool - , itrExpectedContinue :: TVar Bool - - , itrReqChunkLength :: TVar (Maybe Int) - , itrReqChunkRemaining :: TVar (Maybe Int) - , itrReqChunkIsOver :: TVar Bool - , itrReqBodyWanted :: TVar (Maybe Int) - , itrReqBodyWasteAll :: TVar Bool - , itrReceivedBody :: TVar ByteString -- Resource が受領した部分は削除される - - , itrWillReceiveBody :: TVar Bool - , itrWillChunkBody :: TVar Bool - , itrWillDiscardBody :: TVar Bool - , itrWillClose :: TVar Bool - - , itrBodyToSend :: TVar ByteString - , itrBodyIsNull :: TVar Bool - - , itrState :: TVar InteractionState - - , itrWroteContinue :: TVar Bool - , itrWroteHeader :: TVar Bool - } - --- Resource の視點で見た時の状態。常に上から下へ行き、逆行しない。初期 --- 状態は ExaminingRequest。 -data InteractionState = ExaminingRequest - | GettingBody - | DecidingHeader - | DecidingBody - | Done - deriving (Show, Eq, Ord, Enum) - -type InteractionQueue = TVar (Seq Interaction) - - -newInteractionQueue :: IO InteractionQueue -newInteractionQueue = newTVarIO S.empty - - -defaultPageContentType :: String -defaultPageContentType = "application/xhtml+xml" - - -newInteraction :: Config -> HostName -> Maybe Request -> IO Interaction -newInteraction conf host req - = do request <- newTVarIO $ req - responce <- newTVarIO $ Response { - resVersion = HttpVersion 1 1 - , resStatus = Ok - , resHeaders = [("Content-Type", defaultPageContentType)] - } - - requestHasBody <- newTVarIO False - requestIsChunked <- newTVarIO False - expectedContinue <- newTVarIO False - - reqChunkLength <- newTVarIO Nothing -- 現在のチャンク長 - reqChunkRemaining <- newTVarIO Nothing -- 現在のチャンクの殘り - reqChunkIsOver <- newTVarIO False -- 最後のチャンクを讀み終へた - reqBodyWanted <- newTVarIO Nothing -- Resource が要求してゐるチャンク長 - reqBodyWasteAll <- newTVarIO False -- 殘りの body を讀み捨てよと云ふ要求 - receivedBody <- newTVarIO B.empty - - willReceiveBody <- newTVarIO False - willChunkBody <- newTVarIO False - willDiscardBody <- newTVarIO False - willClose <- newTVarIO False - - bodyToSend <- newTVarIO B.empty - bodyIsNull <- newTVarIO True -- 一度でも bodyToSend が空でなくなったら False - - state <- newTVarIO ExaminingRequest - - wroteContinue <- newTVarIO False - wroteHeader <- newTVarIO False - - return $ Interaction { - itrConfig = conf - , itrRemoteHost = host - , itrResourcePath = Nothing - , itrRequest = request - , itrResponse = responce - - , itrRequestHasBody = requestHasBody - , itrRequestIsChunked = requestIsChunked - , itrExpectedContinue = expectedContinue - - , itrReqChunkLength = reqChunkLength - , itrReqChunkRemaining = reqChunkRemaining - , itrReqChunkIsOver = reqChunkIsOver - , itrReqBodyWanted = reqBodyWanted - , itrReqBodyWasteAll = reqBodyWasteAll - , itrReceivedBody = receivedBody - - , itrWillReceiveBody = willReceiveBody - , itrWillChunkBody = willChunkBody - , itrWillDiscardBody = willDiscardBody - , itrWillClose = willClose - - , itrBodyToSend = bodyToSend - , itrBodyIsNull = bodyIsNull - - , itrState = state - - , itrWroteContinue = wroteContinue - , itrWroteHeader = wroteHeader - } - - -writeItr :: Interaction -> (Interaction -> TVar a) -> a -> STM () -writeItr itr accessor value - = writeTVar (accessor itr) value + , SomeInteraction(..) + , EndOfInteraction(..) + , SyntacticallyInvalidInteraction(..) + , mkSyntacticallyInvalidInteraction -readItr :: Interaction -> (Interaction -> TVar a) -> (a -> b) -> STM b -readItr itr accessor reader - = readTVar (accessor itr) >>= return . reader + , SemanticallyInvalidInteraction(..) + , mkSemanticallyInvalidInteraction + , NormalInteraction(..) + , InteractionState(..) + , ReceiveBodyRequest(..) + , mkNormalInteraction -readItrF :: (Functor f) => Interaction -> (Interaction -> TVar (f a)) -> (a -> b) -> STM (f b) -readItrF itr accessor reader - = readItr itr accessor (fmap reader) - - -updateItr :: Interaction -> (Interaction -> TVar a) -> (a -> a) -> STM () -updateItr itr accessor updator - = do old <- readItr itr accessor id - writeItr itr accessor (updator old) - + , InteractionQueue + , mkInteractionQueue -updateItrF :: (Functor f) => Interaction -> (Interaction -> TVar (f a)) -> (a -> a) -> STM () -updateItrF itr accessor updator - = updateItr itr accessor (fmap updator) + , getCurrentDate + ) + where +import Blaze.ByteString.Builder (Builder) +import Control.Applicative +import Control.Concurrent.STM +import Data.Ascii (Ascii) +import Data.ByteString (ByteString) +import Data.Convertible.Base +import Data.Monoid.Unicode +import Data.Proxy +import Data.Sequence (Seq) +import Data.Time +import Data.Time.Format.HTTP +import Data.Typeable +import Network.Socket +import Network.HTTP.Lucu.Config +import Network.HTTP.Lucu.DefaultPage +import Network.HTTP.Lucu.Headers +import Network.HTTP.Lucu.Preprocess +import Network.HTTP.Lucu.Request +import Network.HTTP.Lucu.Response +import Network.HTTP.Lucu.Utils +#if defined(HAVE_SSL) +import OpenSSL.X509 +#endif +import Prelude.Unicode + +class Typeable i ⇒ Interaction i where + toInteraction ∷ i → SomeInteraction + toInteraction = SomeInteraction + + fromInteraction ∷ SomeInteraction → Maybe i + fromInteraction (SomeInteraction i) = cast i + +data SomeInteraction + = ∀i. Interaction i ⇒ SomeInteraction !i + deriving Typeable + +instance Interaction SomeInteraction where + toInteraction = id + fromInteraction = Just + +-- |'EndOfInteraction' is an 'Interaction' indicating the end of +-- (possibly pipelined) requests. The connection has already been +-- closed so no need to reply anything. +data EndOfInteraction = EndOfInteraction + deriving Typeable +instance Interaction EndOfInteraction + +-- |'SyntacticallyInvalidInteraction' is an 'Interaction' without even +-- a syntactically valid 'Request'. The response code will always be +-- 'BadRequest'. +data SyntacticallyInvalidInteraction + = SYI { + syiResponse ∷ !Response + , syiBodyToSend ∷ !Builder + } + deriving Typeable +instance Interaction SyntacticallyInvalidInteraction + +mkSyntacticallyInvalidInteraction ∷ Config + → IO SyntacticallyInvalidInteraction +mkSyntacticallyInvalidInteraction conf@(Config {..}) + = do date ← getCurrentDate + let res = setHeader "Server" cnfServerSoftware $ + setHeader "Date" date $ + setHeader "Content-Type" defaultPageContentType $ + emptyResponse BadRequest + body = defaultPageForResponse conf Nothing res + return SYI { + syiResponse = res + , syiBodyToSend = body + } + +-- |'SemanticallyInvalidInteraction' is an 'Interaction' without a +-- semantically valid 'Request'. The response code will always satisfy +-- 'isError'. +data SemanticallyInvalidInteraction + = SEI { + seiRequest ∷ !Request + , seiExpectedContinue ∷ !Bool + , seiReqBodyLength ∷ !(Maybe RequestBodyLength) + + , seiResponse ∷ !Response + , seiWillChunkBody ∷ !Bool + , seiWillDiscardBody ∷ !Bool + , seiWillClose ∷ !Bool + , seiBodyToSend ∷ !Builder + } + deriving Typeable +instance Interaction SemanticallyInvalidInteraction + +mkSemanticallyInvalidInteraction ∷ Config + → AugmentedRequest + → IO SemanticallyInvalidInteraction +mkSemanticallyInvalidInteraction config@(Config {..}) (AugmentedRequest {..}) + = do date ← getCurrentDate + let res = setHeader "Server" cnfServerSoftware $ + setHeader "Date" date $ + setHeader "Content-Type" defaultPageContentType $ + ( if arWillChunkBody + then setHeader "Transfer-Encoding" "chunked" + else id + ) $ + ( if arWillClose + then setHeader "Connection" "close" + else id + ) $ + emptyResponse arInitialStatus + body = defaultPageForResponse config (Just arRequest) res + return SEI { + seiRequest = arRequest + , seiExpectedContinue = arExpectedContinue + , seiReqBodyLength = arReqBodyLength + + , seiResponse = res + , seiWillChunkBody = arWillChunkBody + , seiWillDiscardBody = arWillDiscardBody + , seiWillClose = arWillClose + , seiBodyToSend = body + } + +-- |'NormalInteraction' is an 'Interaction' with a semantically +-- correct 'Request'. +data NormalInteraction + = NI { + niConfig ∷ !Config + , niRemoteAddr ∷ !SockAddr +#if defined(HAVE_SSL) + , niRemoteCert ∷ !(Maybe X509) +#endif + , niRequest ∷ !Request + , niResourcePath ∷ !Path + , niExpectedContinue ∷ !Bool + , niReqBodyLength ∷ !(Maybe RequestBodyLength) + + , niReceiveBodyReq ∷ !(TMVar ReceiveBodyRequest) + , niReceivedBody ∷ !(TMVar ByteString) + + , niResponse ∷ !(TVar Response) + , niSendContinue ∷ !(TMVar Bool) + , niWillChunkBody ∷ !Bool + , niWillDiscardBody ∷ !(TVar Bool) + , niWillClose ∷ !(TVar Bool) + , niResponseHasCType ∷ !(TVar Bool) + -- FIXME: use TBChan Builder (in stm-chans package) + , niBodyToSend ∷ !(TMVar Builder) + + , niState ∷ !(TVar InteractionState) + } + deriving Typeable +instance Interaction NormalInteraction + +data ReceiveBodyRequest + = ReceiveBody !Int -- ^ Maximum number of octets to receive. + | WasteAll + deriving (Show, Eq) + +-- |The interaction state of Resource monad. 'ExaminingRequest' is the +-- initial state. +data InteractionState + = ExaminingRequest + | ReceivingBody + | DecidingHeader + | SendingBody + | Done + deriving (Show, Eq, Ord, Enum) + +mkNormalInteraction ∷ Config + → SockAddr +#if defined(HAVE_SSL) + → Maybe X509 +#endif + → AugmentedRequest + → Path + → IO NormalInteraction +#if defined(HAVE_SSL) +mkNormalInteraction config remoteAddr remoteCert (AugmentedRequest {..}) rsrcPath +#else +mkNormalInteraction config remoteAddr (AugmentedRequest {..}) rsrcPath +#endif + = do receiveBodyReq ← newEmptyTMVarIO + receivedBody ← newEmptyTMVarIO + + response ← newTVarIO $ emptyResponse arInitialStatus + sendContinue ← newEmptyTMVarIO + willDiscardBody ← newTVarIO arWillDiscardBody + willClose ← newTVarIO arWillClose + responseHasCType ← newTVarIO False + bodyToSend ← newEmptyTMVarIO + + state ← newTVarIO ExaminingRequest + + return NI { + niConfig = config + , niRemoteAddr = remoteAddr +#if defined(HAVE_SSL) + , niRemoteCert = remoteCert +#endif + , niRequest = arRequest + , niResourcePath = rsrcPath + , niExpectedContinue = arExpectedContinue + , niReqBodyLength = arReqBodyLength + + , niReceiveBodyReq = receiveBodyReq + , niReceivedBody = receivedBody + + , niResponse = response + , niSendContinue = sendContinue + , niWillChunkBody = arWillChunkBody + , niWillDiscardBody = willDiscardBody + , niWillClose = willClose + , niResponseHasCType = responseHasCType + , niBodyToSend = bodyToSend + + , niState = state + } + +type InteractionQueue = TVar (Seq SomeInteraction) + +mkInteractionQueue ∷ IO InteractionQueue +{-# INLINE mkInteractionQueue #-} +mkInteractionQueue = newTVarIO (∅) + +getCurrentDate ∷ IO Ascii +{-# INLINE getCurrentDate #-} +getCurrentDate = flip proxy http ∘ cs <$> getCurrentTime