- relyOnRequest :: Interaction -> STM ()
- relyOnRequest itr
- = itr `seq`
- do status <- readItr itr itrResponse resStatus
- req <- readItr itr itrRequest fromJust
-
- let reqVer = reqVersion req
- canHaveBody = if reqMethod req == HEAD then
- False
- else
- not (isInformational status ||
- status == NoContent ||
- status == ResetContent ||
- status == NotModified )
-
- updateRes itr $! deleteHeader (C8.pack "Content-Length")
- updateRes itr $! deleteHeader (C8.pack "Transfer-Encoding")
-
- cType <- readHeader itr (C8.pack "Content-Type")
- when (cType == Nothing)
- $ updateRes itr $ setHeader (C8.pack "Content-Type") defaultPageContentType
-
- if canHaveBody then
- when (reqVer == HttpVersion 1 1)
- $ do updateRes itr $! setHeader (C8.pack "Transfer-Encoding") (C8.pack "chunked")
- writeItr itr itrWillChunkBody True
- else
- -- body 関連のヘッダを削除。但し HEAD なら Content-* は殘す
- when (reqMethod req /= HEAD)
- $ do updateRes itr $! deleteHeader (C8.pack "Content-Type")
- updateRes itr $! deleteHeader (C8.pack "Etag")
- updateRes itr $! deleteHeader (C8.pack "Last-Modified")
-
- conn <- readHeader itr (C8.pack "Connection")
- case conn of
- Nothing -> return ()
- Just value -> if value `noCaseEq` C8.pack "close" then
- writeItr itr itrWillClose True
- else
- return ()
-
- willClose <- readItr itr itrWillClose id
- when willClose
- $ updateRes itr $! setHeader (C8.pack "Connection") (C8.pack "close")
-
- when (reqMethod req == HEAD || not canHaveBody)
- $ writeTVar (itrWillDiscardBody itr) True
-
- readHeader :: Interaction -> ByteString -> STM (Maybe ByteString)
- readHeader itr name
- = itr `seq` name `seq`
- readItr itr itrResponse $ getHeader name
-
- updateRes :: Interaction -> (Response -> Response) -> STM ()
- updateRes itr updator
- = itr `seq` updator `seq`
- updateItr itr itrResponse updator
-
-
-completeUnconditionalHeaders :: Config -> Response -> IO Response
-completeUnconditionalHeaders conf res
- = conf `seq` res `seq`
- return res >>= compServer >>= compDate >>= return
- where
- compServer res
- = case getHeader (C8.pack "Server") res of
- Nothing -> return $ setHeader (C8.pack "Server") (cnfServerSoftware conf) res
- Just _ -> return res
-
- compDate res
- = case getHeader (C8.pack "Date") res of
- Nothing -> do date <- getCurrentDate
- return $ setHeader (C8.pack "Date") date res
- Just _ -> return res
-
-
-cache :: IORef (ClockTime, ByteString)
-cache = unsafePerformIO $
- newIORef (TOD 0 0, undefined)
-{-# NOINLINE cache #-}
-
-getCurrentDate :: IO ByteString
-getCurrentDate = do now@(TOD curSec _) <- getClockTime
- (TOD cachedSec _, cachedStr) <- readIORef cache
-
- if curSec == cachedSec then
- return cachedStr
- else
- do let dateStr = C8.pack $ formatHTTPDateTime now
- writeIORef cache (now, dateStr)
- return dateStr
\ No newline at end of file
+ go ∷ Response → STM ()
+ go res@(Response {..})
+ = do unless (any (\ p → p resStatus) [ isSuccessful
+ , isRedirection
+ , isError
+ ])
+ $ abort'
+ $ A.toAsciiBuilder "Inappropriate status code for a response: "
+ ⊕ printStatusCode resStatus
+
+ when ( resStatus ≈ MethodNotAllowed ∧
+ hasHeader "Allow" res )
+ $ abort'
+ $ A.toAsciiBuilder "The status was "
+ ⊕ printStatusCode resStatus
+ ⊕ A.toAsciiBuilder " but no \"Allow\" header."
+
+ when ( resStatus ≉ NotModified ∧
+ isRedirection resStatus ∧
+ hasHeader "Location" res )
+ $ abort'
+ $ A.toAsciiBuilder "The status code was "
+ ⊕ printStatusCode resStatus
+ ⊕ A.toAsciiBuilder " but no Location header."
+
+ abort' ∷ AsciiBuilder → STM ()
+ abort' = throwSTM
+ ∘ mkAbortion' InternalServerError
+ ∘ A.toText
+ ∘ A.fromAsciiBuilder
+
+postprocessWithRequest ∷ NormalInteraction → STM ()
+postprocessWithRequest ni@(NI {..})
+ = do willDiscardBody ← readTVar niWillDiscardBody
+ canHaveBody ← if willDiscardBody then
+ return False
+ else
+ resCanHaveBody <$> readTVar niResponse
+
+ updateRes ni
+ $ deleteHeader "Content-Length"
+ ∘ deleteHeader "Transfer-Encoding"
+
+ if canHaveBody then
+ do when niWillChunkBody $
+ writeHeader ni "Transfer-Encoding" (Just "chunked")
+ writeDefaultPageIfNeeded ni
+ else
+ do writeTVar niWillDiscardBody True
+ -- These headers make sense for HEAD requests even
+ -- when there won't be a response entity body.
+ when (reqMethod niRequest ≢ HEAD)
+ $ updateRes ni
+ $ deleteHeader "Content-Type"
+ ∘ deleteHeader "Etag"
+ ∘ deleteHeader "Last-Modified"
+
+ hasConnClose ← (≡ Just "close") <$> readCIHeader ni "Connection"
+ willClose ← readTVar niWillClose
+ when (hasConnClose ∧ (¬) willClose)
+ $ writeTVar niWillClose True
+ when ((¬) hasConnClose ∧ willClose)
+ $ writeHeader ni "Connection" (Just "close")
+
+writeDefaultPageIfNeeded ∷ NormalInteraction → STM ()
+writeDefaultPageIfNeeded ni@(NI {..})
+ = do resHasCType ← readTVar niResponseHasCType
+ unless resHasCType
+ $ do writeHeader ni "Content-Type" $ Just defaultPageContentType
+ writeHeader ni "Content-Encoding" Nothing
+ res ← readTVar niResponse
+ let body = getDefaultPage niConfig (Just niRequest) res
+ putTMVar niBodyToSend body
+
+completeUnconditionalHeaders ∷ NormalInteraction → STM ()
+completeUnconditionalHeaders ni@(NI {..})
+ = do srv ← readHeader ni "Server"
+ when (isNothing srv) $
+ writeHeader ni "Server" $ Just $ cnfServerSoftware niConfig
+
+ date ← readHeader ni "Date"
+ when (isNothing date) $
+ do date' ← unsafeIOToSTM getCurrentDate
+ writeHeader ni "Date" $ Just date'
+
+writeHeader ∷ NormalInteraction → CIAscii → Maybe Ascii → STM ()
+{-# INLINE writeHeader #-}
+writeHeader ni k v
+ = case v of
+ Just v' → updateRes ni $ setHeader k v'
+ Nothing → updateRes ni $ deleteHeader k
+
+readHeader ∷ NormalInteraction → CIAscii → STM (Maybe Ascii)
+{-# INLINE readHeader #-}
+readHeader (NI {..}) k
+ = getHeader k <$> readTVar niResponse
+
+readCIHeader ∷ NormalInteraction → CIAscii → STM (Maybe CIAscii)
+{-# INLINE readCIHeader #-}
+readCIHeader (NI {..}) k
+ = getCIHeader k <$> readTVar niResponse
+
+updateRes ∷ NormalInteraction → (Response → Response) → STM ()
+{-# INLINE updateRes #-}
+updateRes (NI {..}) f
+ = do old ← readTVar niResponse
+ writeTVar niResponse $ f old