requestReader :: Config -> ResTree -> Handle -> HostName -> InteractionQueue -> IO ()
requestReader cnf tree h host tQueue
- = do catch (acceptRequest B.empty) $ \ exc ->
+ = do catch (do input <- B.hGetContents h
+ acceptRequest input) $ \ exc ->
case exc of
IOException _ -> return ()
AsyncException ThreadKilled -> return ()
_ -> print exc
where
acceptRequest :: ByteString -> IO ()
- acceptRequest soFar
+ acceptRequest input
-- キューに最大パイプライン深度以上のリクエストが溜まってゐる
-- 時は、それが限度以下になるまで待つ。
= do atomically $ do queue <- readTVar tQueue
-- リクエストを讀む。パースできない場合は直ちに 400 Bad
-- Request 應答を設定し、それを出力してから切斷するやう
-- に ResponseWriter に通知する。
- hWaitForInput h (-1)
- chunk <- B.hGetNonBlocking h 1024
-
- let input = B.append soFar chunk
case parse requestP input of
(Success req , input') -> acceptParsableRequest req input'
- (IllegalInput, _ ) -> acceptNonparsableRequest
- (ReachedEOF , _ ) -> if B.length input >= 1024 * 1024 then
- -- ヘッダ長過ぎ
- acceptNonparsableRequest
- else
- acceptRequest input
-
-
- acceptNonparsableRequest :: IO ()
- acceptNonparsableRequest
- = do itr <- newInteraction host Nothing
+ (IllegalInput, _ ) -> acceptNonparsableRequest BadRequest
+ (ReachedEOF , _ ) -> acceptNonparsableRequest BadRequest
+
+ acceptNonparsableRequest :: StatusCode -> IO ()
+ acceptNonparsableRequest status
+ = do itr <- newInteraction cnf host Nothing
let res = Response {
resVersion = HttpVersion 1 1
- , resStatus = BadRequest
+ , resStatus = status
, resHeaders = []
+
}
atomically $ do writeItr itr itrResponse $ Just res
writeItr itr itrWillClose True
enqueue itr
acceptParsableRequest :: Request -> ByteString -> IO ()
- acceptParsableRequest req soFar
- = do itr <- newInteraction host (Just req)
+ acceptParsableRequest req input
+ = do itr <- newInteraction cnf host (Just req)
action
<- atomically $
do preprocess itr
isErr <- readItrF itr itrResponse (isError . resStatus)
if isErr == Just True then
- acceptSemanticallyInvalidRequest itr soFar
+ acceptSemanticallyInvalidRequest itr input
else
case findResource tree $ (reqURI . fromJust . itrRequest) itr of
Nothing -- Resource が無かった
- -> acceptRequestForNonexistentResource itr soFar
+ -> acceptRequestForNonexistentResource itr input
Just rsrcDef -- あった
- -> acceptRequestForExistentResource itr soFar rsrcDef
+ -> acceptRequestForExistentResource itr input rsrcDef
action
acceptSemanticallyInvalidRequest :: Interaction -> ByteString -> STM (IO ())
- acceptSemanticallyInvalidRequest itr soFar
+ acceptSemanticallyInvalidRequest itr input
= do writeItr itr itrState Done
writeDefaultPage itr
postprocess itr
enqueue itr
- return $ acceptRequest soFar
+ return $ acceptRequest input
acceptRequestForNonexistentResource :: Interaction -> ByteString -> STM (IO ())
- acceptRequestForNonexistentResource itr soFar
+ acceptRequestForNonexistentResource itr input
= do let res = Response {
resVersion = HttpVersion 1 1
, resStatus = NotFound
writeDefaultPage itr
postprocess itr
enqueue itr
- return $ acceptRequest soFar
+ return $ acceptRequest input
acceptRequestForExistentResource :: Interaction -> ByteString -> ResourceDef -> STM (IO ())
- acceptRequestForExistentResource itr soFar rsrcDef
+ acceptRequestForExistentResource itr input rsrcDef
= do requestHasBody <- readItr itr itrRequestHasBody id
writeItr itr itrState (if requestHasBody
then ExaminingHeader
enqueue itr
return $ do runResource rsrcDef itr
if requestHasBody then
- observeRequest itr soFar
+ observeRequest itr input
else
- acceptRequest soFar
+ acceptRequest input
observeRequest :: Interaction -> ByteString -> IO ()
- observeRequest itr soFar = fail "FIXME: Not Implemented"
+ observeRequest itr input
+ = do isChunked <- atomically $ readItr itr itrRequestIsChunked id
+ if isChunked then
+ observeChunkedRequest itr input
+ else
+ observeNonChunkedRequest itr input
+
+ observeChunkedRequest :: Interaction -> ByteString -> IO ()
+ observeChunkedRequest itr input
+ = fail "FIXME: not implemented"
+
+ observeNonChunkedRequest :: Interaction -> ByteString -> IO ()
+ observeNonChunkedRequest itr input
+ = do action
+ <- atomically $
+ do wantedM <- readItr itr itrReqBodyWanted id
+ if wantedM == Nothing then
+ do wasteAll <- readItr itr itrReqBodyWasteAll id
+ if wasteAll then
+ -- 破棄要求が來た
+ do remainingM <- readItr itr itrReqChunkRemaining id
+
+ let (_, input') = if remainingM == Nothing then
+ (B.takeWhile (\ _ -> True) input, B.empty)
+ else
+ B.splitAt (fromIntegral $ fromJust remainingM) input
+
+ writeItr itr itrReqChunkRemaining $ Just 0
+ writeItr itr itrReqChunkIsOver True
+ writeItr itr itrReqBodyWanted Nothing
+ writeItr itr itrReceivedBody B.empty
+
+ return $ acceptRequest input'
+ else
+ -- 要求がまだ来ない
+ retry
+ else
+ -- 受信要求が來た
+ do remainingM <- readItr itr itrReqChunkRemaining id
+
+ let wanted = fromJust wantedM
+ expectedChunkLen = fromIntegral $ maybe wanted (min wanted) remainingM
+ (chunk, input') = B.splitAt expectedChunkLen input
+ newRemaining = fmap
+ (\ x -> x - (fromIntegral $ B.length chunk))
+ remainingM
+ isOver = B.length chunk < expectedChunkLen
+
+ writeItr itr itrReqChunkRemaining newRemaining
+ writeItr itr itrReqChunkIsOver isOver
+ writeItr itr itrReqBodyWanted Nothing
+ writeItr itr itrReceivedBody chunk
+
+ if isOver then
+ return $ acceptRequest input'
+ else
+ return $ observeNonChunkedRequest itr input'
+ action
enqueue :: Interaction -> STM ()
enqueue itr = do queue <- readTVar tQueue
projects / Lucu.git / blobdiff