module Network.HTTP.Lucu.RequestReader
- ( requestReader -- Config -> ResTree -> Handle -> HostName -> InteractionQueue -> IO ()
+ ( requestReader
)
where
import Control.Monad
import qualified Data.ByteString.Lazy.Char8 as B
import Data.ByteString.Lazy.Char8 (ByteString)
-import Data.Map as M
-import Data.Map (Map)
import Data.Maybe
import qualified Data.Sequence as S
-import Data.Sequence (Seq, (<|), ViewR(..))
-import Network
+import Data.Sequence ((<|))
+import Network.Socket
import Network.HTTP.Lucu.Config
-import Network.HTTP.Lucu.HttpVersion
+import Network.HTTP.Lucu.Chunk
+import Network.HTTP.Lucu.DefaultPage
import Network.HTTP.Lucu.Interaction
import Network.HTTP.Lucu.Parser
import Network.HTTP.Lucu.Postprocess
import Network.HTTP.Lucu.Preprocess
import Network.HTTP.Lucu.Request
import Network.HTTP.Lucu.Response
-import Network.HTTP.Lucu.Resource
+import Network.HTTP.Lucu.Resource.Tree
import Prelude hiding (catch)
import System.IO
-import GHC.Conc (unsafeIOToSTM)
-requestReader :: Config -> ResTree -> Handle -> HostName -> InteractionQueue -> IO ()
-requestReader cnf tree h host tQueue
- = do input <- B.hGetContents h
- catch (acceptRequest input) $ \ exc ->
+requestReader :: Config -> ResTree -> Handle -> SockAddr -> InteractionQueue -> IO ()
+requestReader cnf tree h addr tQueue
+ = cnf `seq` tree `seq` h `seq` addr `seq` tQueue `seq`
+ do catch (do input <- B.hGetContents h
+ acceptRequest input) $ \ exc ->
case exc of
- IOException _ -> return ()
- _ -> print exc
+ IOException _ -> return ()
+ AsyncException ThreadKilled -> return ()
+ BlockedIndefinitely -> putStrLn "requestReader: blocked indefinitely"
+ _ -> print exc
where
acceptRequest :: ByteString -> IO ()
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 action
- <- atomically $
- do queue <- readTVar tQueue
- when (S.length queue >= cnfMaxPipelineDepth cnf)
- retry
-
- -- 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。
- case parse requestP input of
- Nothing -> return acceptNonparsableRequest
- Just (req, input') -> return $ acceptParsableRequest req input'
- action
-
- acceptNonparsableRequest :: IO ()
- acceptNonparsableRequest
- = do itr <- newInteraction host Nothing
- let res = Response {
- resVersion = HttpVersion 1 1
- , resStatus = BadRequest
- , resHeaders = []
- }
- atomically $ do writeTVar (itrResponse itr) $ Just res
- writeTVar (itrWillClose itr) True
- writeTVar (itrState itr) Done
+ = do atomically $ do queue <- readTVar tQueue
+ when (S.length queue >= cnfMaxPipelineDepth cnf)
+ retry
+
+ -- 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。
+ case parse requestP input of
+ (Success req , input') -> acceptParsableRequest req input'
+ (IllegalInput, _ ) -> acceptNonparsableRequest BadRequest
+ (ReachedEOF , _ ) -> acceptNonparsableRequest BadRequest
+
+ acceptNonparsableRequest :: StatusCode -> IO ()
+ acceptNonparsableRequest status
+ = do itr <- newInteraction cnf addr Nothing
+ atomically $ do updateItr itr itrResponse
+ $ \ res -> res {
+ resStatus = status
+ }
+ writeItr itr itrWillClose True
+ writeItr itr itrState Done
+ writeDefaultPage itr
postprocess itr
enqueue itr
acceptParsableRequest :: Request -> ByteString -> IO ()
- acceptParsableRequest req input'
- = do itr <- newInteraction host (Just req)
+ acceptParsableRequest req input
+ = do itr <- newInteraction cnf addr (Just req)
action
<- atomically $
do preprocess itr
- res <- readTVar (itrResponse itr)
- if fmap isError (fmap resStatus res) == Just True then
- acceptSemanticallyInvalidRequest itr input'
+ isErr <- readItr itr itrResponse (isError . resStatus)
+ if isErr then
+ acceptSemanticallyInvalidRequest itr input
else
- case findResource tree $ (reqURI . fromJust . itrRequest) itr of
+ case findResource tree $ reqURI req of
Nothing -- Resource が無かった
- -> acceptRequestForNonexistentResource itr input'
+ -> acceptRequestForNonexistentResource itr input
- Just rsrcDef -- あった
- -> acceptRequestForExistentResource itr input' rsrcDef
+ Just (rsrcPath, rsrcDef) -- あった
+ -> acceptRequestForExistentResource itr input rsrcPath rsrcDef
action
acceptSemanticallyInvalidRequest :: Interaction -> ByteString -> STM (IO ())
acceptSemanticallyInvalidRequest itr input
- = do writeTVar (itrState itr) Done
+ = do writeItr itr itrState Done
+ writeDefaultPage itr
postprocess itr
enqueue itr
return $ acceptRequest input
acceptRequestForNonexistentResource :: Interaction -> ByteString -> STM (IO ())
acceptRequestForNonexistentResource itr input
- = do let res = Response {
- resVersion = HttpVersion 1 1
- , resStatus = NotFound
- , resHeaders = []
- }
- writeTVar (itrResponse itr) $ Just res
- writeTVar (itrState itr) Done
+ = do updateItr itr itrResponse
+ $ \res -> res {
+ resStatus = NotFound
+ }
+ writeItr itr itrState Done
+ writeDefaultPage itr
postprocess itr
enqueue itr
return $ acceptRequest input
- acceptRequestForExistentResource :: Interaction -> ByteString -> ResourceDef -> STM (IO ())
- acceptRequestForExistentResource itr input rsrcDef
- = do requestHasBody <- readTVar (itrRequestHasBody itr)
- writeTVar (itrState itr) (if requestHasBody
- then ExaminingHeader
- else DecidingHeader)
+ acceptRequestForExistentResource :: Interaction -> ByteString -> [String] -> ResourceDef -> STM (IO ())
+ acceptRequestForExistentResource oldItr input rsrcPath rsrcDef
+ = do let itr = oldItr { itrResourcePath = Just rsrcPath }
+ requestHasBody <- readItr itr itrRequestHasBody id
enqueue itr
return $ do runResource rsrcDef itr
if requestHasBody then
acceptRequest input
observeRequest :: Interaction -> ByteString -> IO ()
- observeRequest itr input = 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
+ = do action
+ <- atomically $
+ do isOver <- readItr itr itrReqChunkIsOver id
+ if isOver then
+ return $ acceptRequest input
+ else
+ 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
+ if fmap (> 0) remainingM == Just True then
+ -- 現在のチャンクをまだ
+ -- 讀み終へてゐない
+ do let (_, input') = B.splitAt (fromIntegral
+ $ fromJust remainingM) input
+ (footerR, input'') = parse chunkFooterP input'
+
+ if footerR == Success () then
+ -- チャンクフッタを正常に讀めた
+ do writeItr itr itrReqChunkRemaining $ Just 0
+
+ return $ observeChunkedRequest itr input''
+ else
+ return $ chunkWasMalformed itr
+ else
+ -- 次のチャンクを讀み始める
+ seekNextChunk itr input
+ else
+ -- 要求がまだ來ない
+ retry
+ else
+ -- 受信要求が來た
+ do remainingM <- readItr itr itrReqChunkRemaining id
+ if fmap (> 0) remainingM == Just True then
+ -- 現在のチャンクをまだ讀み
+ -- 終へてゐない
+ do let wanted = fromJust wantedM
+ remaining = fromJust remainingM
+ bytesToRead = fromIntegral $ min wanted remaining
+ (chunk, input') = B.splitAt bytesToRead input
+ actualReadBytes = fromIntegral $ B.length chunk
+ newWanted = case wanted - actualReadBytes of
+ 0 -> Nothing
+ n -> Just n
+ newRemaining = Just $ remaining - actualReadBytes
+ updateStates
+ = do writeItr itr itrReqChunkRemaining newRemaining
+ writeItr itr itrReqBodyWanted newWanted
+ updateItr itr itrReceivedBody $ flip B.append chunk
+
+ if newRemaining == Just 0 then
+ -- チャンクフッタを讀む
+ case parse chunkFooterP input' of
+ (Success _, input'')
+ -> do updateStates
+ return $ observeChunkedRequest itr input''
+ _ -> return $ chunkWasMalformed itr
+ else
+ -- まだチャンクの終はりに達してゐない
+ do updateStates
+ return $ observeChunkedRequest itr input'
+ else
+ -- 次のチャンクを讀み始める
+ seekNextChunk itr input
+ action
+
+ seekNextChunk :: Interaction -> ByteString -> STM (IO ())
+ seekNextChunk itr input
+ = case parse chunkHeaderP input of
+ -- 最終チャンク (中身が空)
+ (Success 0, input')
+ -> case parse chunkTrailerP input' of
+ (Success _, input'')
+ -> do writeItr itr itrReqChunkLength $ Nothing
+ writeItr itr itrReqChunkRemaining $ Nothing
+ writeItr itr itrReqChunkIsOver True
+
+ return $ acceptRequest input''
+ _ -> return $ chunkWasMalformed itr
+ -- 最終でないチャンク
+ (Success len, input')
+ -> do writeItr itr itrReqChunkLength $ Just len
+ writeItr itr itrReqChunkRemaining $ Just len
+
+ return $ observeChunkedRequest itr input'
+ -- チャンクヘッダがをかしい
+ _ -> return $ chunkWasMalformed itr
+
+ chunkWasMalformed :: Interaction -> IO ()
+ chunkWasMalformed itr
+ = atomically $ do updateItr itr itrResponse
+ $ \ res -> res {
+ resStatus = BadRequest
+ }
+ writeItr itr itrWillClose True
+ writeItr itr itrState Done
+ writeDefaultPage itr
+ postprocess itr
+
+ 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
+
+ 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
+ bytesToRead = fromIntegral $ maybe wanted (min wanted) remainingM
+ (chunk, input') = B.splitAt bytesToRead input
+ newRemaining = fmap
+ (\ x -> x - (fromIntegral $ B.length chunk))
+ remainingM
+ isOver = B.length chunk < bytesToRead || newRemaining == Just 0
+
+ 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