{-# LANGUAGE
- DoAndIfThenElse
+ CPP
+ , DoAndIfThenElse
+ , OverloadedStrings
, RecordWildCards
, ScopedTypeVariables
, UnicodeSyntax
( requestReader
)
where
-import Control.Applicative
-import Control.Concurrent.STM
-import Control.Exception
-import Control.Monad
+import Control.Concurrent
+import Control.Concurrent.STM
+import Control.Exception hiding (block)
+import Control.Monad
import qualified Data.Attoparsec.Lazy as LP
+import qualified Data.ByteString as Strict
import qualified Data.ByteString.Lazy as Lazy
-import Data.Maybe
+import Data.List
+import Data.Maybe
+import Data.Monoid.Unicode
import qualified Data.Sequence as S
-import Data.Sequence.Unicode
-import Network.HTTP.Lucu.Config
-import Network.HTTP.Lucu.Chunk
-import Network.HTTP.Lucu.DefaultPage
-import Network.HTTP.Lucu.HandleLike
-import Network.HTTP.Lucu.Interaction
-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.Tree
+import qualified Data.Text as T
+import Network.HTTP.Lucu.Abortion
+import Network.HTTP.Lucu.Config
+import Network.HTTP.Lucu.Chunk
+import Network.HTTP.Lucu.HandleLike
+import Network.HTTP.Lucu.Interaction
+import Network.HTTP.Lucu.Preprocess
+import Network.HTTP.Lucu.Request
+import Network.HTTP.Lucu.Response
+import Network.HTTP.Lucu.Resource.Internal
+import Network.HTTP.Lucu.Resource.Tree
+import Network.HTTP.Lucu.Utils
import Network.Socket
-import Network.URI
import Prelude.Unicode
-import System.IO (hPutStrLn, stderr)
+import System.IO (hPutStrLn, stderr)
data Context h
= Context {
, cQueue ∷ !InteractionQueue
}
+data ChunkReceivingState
+ = Initial
+ | InChunk !Int -- ^Number of remaining octets in the current
+ -- chunk. It's always positive.
+
requestReader ∷ HandleLike h
⇒ Config
→ ResTree
= do input ← hGetLBS h
acceptRequest (Context cnf tree fbs h port addr tQueue) input
`catches`
- [ Handler $ \ (_ ∷ IOException) → return ()
- , Handler $ \ e → case e of
- ThreadKilled → return ()
- _ → hPutStrLn stderr (show e)
- , Handler $ \ BlockedIndefinitelyOnSTM → hPutStrLn stderr "requestReader: blocked indefinitely"
- , Handler $ \ (e ∷ SomeException) → hPutStrLn stderr (show e)
+ [ Handler handleAsyncE
+ , Handler handleOthers
]
+ `finally`
+ enqueue' tQueue EndOfInteraction
+ where
+ handleAsyncE ∷ AsyncException → IO ()
+ handleAsyncE ThreadKilled = return ()
+ handleAsyncE e = dump e
+
+ handleOthers ∷ SomeException → IO ()
+ handleOthers = dump
+
+ dump ∷ Exception e ⇒ e → IO ()
+ dump e
+ = do hPutStrLn stderr "Lucu: requestReader caught an exception:"
+ hPutStrLn stderr $ show e
acceptRequest ∷ HandleLike h ⇒ Context h → Lazy.ByteString → IO ()
acceptRequest ctx@(Context {..}) 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 cQueue
- when (S.length queue ≥ cnfMaxPipelineDepth cConfig) $
+ when (S.length queue ≥ cnfMaxPipelineDepth cConfig)
+ -- Too many requests in the pipeline...
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 LP.parse requestP input of
- LP.Done input' req → acceptParsableRequest req input'
- LP.Fail _ _ _ → acceptNonparsableRequest ctx BadRequest
+ if Lazy.null input then
+ return ()
+ else
+ case LP.parse request input of
+ LP.Done input' req → acceptParsableRequest ctx req input'
+ LP.Fail _ _ _ → acceptNonparsableRequest ctx
-acceptNonparsableRequest ∷ HandleLike h ⇒ Context h → StatusCode → IO ()
-acceptNonparsableRequest (Context {..}) status
- = do itr ← newInteraction cConfig cPort cAddr Nothing Nothing
- atomically $
- do setResponseStatus itr status
- writeTVar (itrWillClose itr) True
- writeTVar (itrState itr) Done
- writeDefaultPage itr
- postprocess itr
- enqueue itr
+acceptNonparsableRequest ∷ HandleLike h ⇒ Context h → IO ()
+acceptNonparsableRequest ctx@(Context {..})
+ = do syi ← mkSyntacticallyInvalidInteraction cConfig
+ enqueue ctx syi
acceptParsableRequest ∷ HandleLike h
⇒ Context h
→ Request
→ Lazy.ByteString
→ IO ()
-acceptParsableRequest (Context {..}) req input
- = do cert ← hGetPeerCert cHandle
- itr ← newInteraction cConfig cPort cAddr cert (Right req)
- join $ atomically
- $ do preprocess itr
- isErr ← (isError ∘ resStatus) <$> readTVar (itrResponse itr)
- if isErr then
- acceptSemanticallyInvalidRequest itr input
- else
- acceptSemanticallyValidRequest itr (reqURI req) input
-
-acceptSemanticallyInvalidRequest ∷ Interaction → Lazy.ByteString → STM (IO ())
-acceptSemanticallyInvalidRequest itr input
- = do writeTVar (itr itrState) Done
- writeDefaultPage itr
- postprocess itr
- enqueue itr
- return $ acceptRequest input
-
-acceptSemanticallyValidRequest ∷ HandleLike h
- ⇒ Context h
- → Interaction
- → URI
- → Lazy.ByteString
- → IO ()
-acceptSemanticallyValidRequest (Context {..}) itr uri input
- = do rsrcM ← findResource cResTree cFallbacks uri
- case rsrcM of
- Nothing
- → acceptRequestForNonexistentResource itr input
- Just (rsrcPath, rsrcDef)
- → acceptRequestForExistentResource itr input rsrcPath rsrcDef
+acceptParsableRequest ctx@(Context {..}) req input
+ = do let ar = preprocess (cnfServerHost cConfig) cPort req
+ if isError $ arInitialStatus ar then
+ acceptSemanticallyInvalidRequest ctx ar input
+ else
+ do rsrc ← findResource cResTree cFallbacks $ reqURI $ arRequest ar
+ case rsrc of
+ Nothing
+ → do let ar' = ar {
+ arInitialStatus = fromStatusCode NotFound
+ }
+ acceptSemanticallyInvalidRequest ctx ar' input
+ Just (path, def)
+ → acceptRequestForResource ctx ar input path def
-acceptRequestForNonexistentResource ∷ Interaction → Lazy.ByteString → STM (IO ())
-acceptRequestForNonexistentResource itr input
- = do setResponseStatus itr NotFound
- writeTVar (itrState itr) Done
- writeDefaultPage itr
- postprocess itr
- enqueue itr
- return $ acceptRequest input
+acceptSemanticallyInvalidRequest ∷ HandleLike h
+ ⇒ Context h
+ → AugmentedRequest
+ → Lazy.ByteString
+ → IO ()
+acceptSemanticallyInvalidRequest ctx@(Context {..}) ar input
+ = do sei ← mkSemanticallyInvalidInteraction cConfig ar
+ enqueue ctx sei
+ acceptRequest ctx input
-acceptRequestForExistentResource ∷ Interaction → Lazy.ByteString → [String] → ResourceDef → STM (IO ())
-acceptRequestForExistentResource oldItr input rsrcPath rsrcDef
- = do let itr = oldItr { itrResourcePath = Just rsrcPath }
- enqueue itr
- return $ do _ ← runResource rsrcDef itr
- if reqHasBody $ fromJust $ itrRequest itr then
- observeRequest itr input
- else
- acceptRequest input
+acceptRequestForResource ∷ HandleLike h
+ ⇒ Context h
+ → AugmentedRequest
+ → Lazy.ByteString
+ → [Strict.ByteString]
+ → Resource
+ → IO ()
+acceptRequestForResource ctx@(Context {..}) ar@(AugmentedRequest {..}) input rsrcPath rsrcDef
+ = do
+#if defined(HAVE_SSL)
+ cert ← hGetPeerCert cHandle
+ ni ← mkNormalInteraction cConfig cAddr cert ar rsrcPath
+#else
+ ni ← mkNormalInteraction cConfig cAddr ar rsrcPath
+#endif
+ tid ← spawnRsrc rsrcDef ni
+ enqueue ctx ni
+ if reqMustHaveBody arRequest then
+ waitForReceiveBodyReq ctx ni tid input
+ else
+ acceptRequest ctx input
-observeRequest ∷ Interaction → Lazy.ByteString → IO ()
-observeRequest itr input
- | itrReqBodyLength itr ≡ Just Chunked
- = observeChunkedRequest itr input
- | otherwise
- = observeNonChunkedRequest itr input
+waitForReceiveBodyReq ∷ HandleLike h
+ ⇒ Context h
+ → NormalInteraction
+ → ThreadId
+ → Lazy.ByteString
+ → IO ()
+waitForReceiveBodyReq ctx ni@(NI {..}) rsrcTid input
+ = case fromJust niReqBodyLength of
+ Chunked
+ → waitForReceiveChunkedBodyReqForTheFirstTime ctx ni rsrcTid input
+ Fixed len
+ → waitForReceiveNonChunkedBodyReqForTheFirstTime ctx ni input len
-observeChunkedRequest ∷ Interaction → Lazy.ByteString → IO ()
-observeChunkedRequest itr input
+-- Toooooo long name for a function...
+waitForReceiveChunkedBodyReqForTheFirstTime ∷ HandleLike h
+ ⇒ Context h
+ → NormalInteraction
+ → ThreadId
+ → Lazy.ByteString
+ → IO ()
+waitForReceiveChunkedBodyReqForTheFirstTime ctx ni@(NI {..}) rsrcTid input
= join $
atomically $
- do isOver ← readTVar $ itrReqChunkIsOver itr
- if isOver then
- return $ acceptRequest input
- else
- do wantedM ← readTVar $ itrReqBodyWanted itr
- if isNothing wantedM then
- do wasteAll ← readTVar $ itrReqBodyWasteAll itr
- if wasteAll then
- wasteCurrentChunk input
- else
- retry
- else
- readCurrentChunk (fromJust wantedM)
+ do req ← takeTMVar niReceiveBodyReq
+ case req of
+ ReceiveBody wanted
+ → do putTMVar niSendContinue niExpectedContinue
+ return $ readCurrentChunk ctx ni rsrcTid wanted input Initial
+ WasteAll
+ → do putTMVar niSendContinue False
+ return $ wasteAllChunks ctx rsrcTid input Initial
+
+waitForReceiveChunkedBodyReq ∷ HandleLike h
+ ⇒ Context h
+ → NormalInteraction
+ → ThreadId
+ → Lazy.ByteString
+ → ChunkReceivingState
+ → IO ()
+waitForReceiveChunkedBodyReq ctx ni@(NI {..}) rsrcTid input st
+ = do req ← atomically $ takeTMVar niReceiveBodyReq
+ case req of
+ ReceiveBody wanted
+ → readCurrentChunk ctx ni rsrcTid wanted input st
+ WasteAll
+ → wasteAllChunks ctx rsrcTid input st
-wasteCurrentChunk ∷ Interaction → Lazy.ByteString → Int → IO ()
-wasteCurrentChunk itr input len
- | len > 0
- = let input' = Lazy.drop (fromIntegral len) input
- in
- case LP.parse chunkFooterP input' of
- LP.Done input'' _
- → observeChunkedRequest itr input''
- LP.Fail _ _ _
- → chunkWasMalformed itr
- | otherwise
- = seekNextChunk itr input
+wasteAllChunks ∷ HandleLike h
+ ⇒ Context h
+ → ThreadId
+ → Lazy.ByteString
+ → ChunkReceivingState
+ → IO ()
+wasteAllChunks ctx rsrcTid = go
+ where
+ go ∷ Lazy.ByteString → ChunkReceivingState → IO ()
+ go input Initial
+ = case LP.parse chunkHeader input of
+ LP.Done input' chunkLen
+ | chunkLen ≡ 0 → gotFinalChunk input'
+ | otherwise → gotChunk input' chunkLen
+ LP.Fail _ eCtx e
+ → chunkWasMalformed rsrcTid eCtx e
+ "wasteAllChunks: chunkHeader"
+ go input (InChunk chunkLen)
+ = gotChunk input chunkLen
+
+ gotChunk ∷ Lazy.ByteString → Int → IO ()
+ gotChunk input chunkLen
+ = let input' = Lazy.drop (fromIntegral chunkLen) input
+ in
+ case LP.parse chunkFooter input' of
+ LP.Done input'' _
+ → go input'' Initial
+ LP.Fail _ eCtx e
+ → chunkWasMalformed rsrcTid eCtx e
+ "wasteAllChunks: chunkFooter"
-readCurrentChunk ∷ Interaction → Lazy.ByteString → Int → Int → IO ()
-readCurrentChunk itr input wanted remaining
- | remaining > 0
- = do let bytesToRead = fromIntegral $ min wanted remaining
- (chunk, input') = Lazy.splitAt bytesToRead input
- actualReadBytes = fromIntegral $ Lazy.length chunk
- newWanted = case wanted - actualReadBytes of
- 0 → Nothing
- n → Just n
- newRemaining = Just $ remaining - actualReadBytes
- updateStates = do writeTVar (itrReqBodyWanted itr) newWanted
- oldBody ← readTVar $ itrReceivedBody itr
- oldBodyLen ← readTVar $ itrReceivedBodyLen itr
- writeTVar (itrReceivedBody itr) $ oldBody ⊳ chunk
- writeTVar (itrReceivedBodyLen itr) $ oldBodyLen + actualReadBytes
- if newRemaining ≡ Just 0 then
- case LP.parse chunkFooterP input' of
- LP.Done input'' _
- → do updateStates
- observeChunkedRequest itr input''
- LP.Fail _ _ _
- → chunkWasMalformed itr
- else
- do updateStates
- observeChunkedRequest itr input'
- | otherwise
- = seekNextChunk itr input
+ gotFinalChunk ∷ Lazy.ByteString → IO ()
+ gotFinalChunk input
+ = case LP.parse chunkTrailer input of
+ LP.Done input' _
+ → acceptRequest ctx input'
+ LP.Fail _ eCtx e
+ → chunkWasMalformed rsrcTid eCtx e
+ "wasteAllChunks: chunkTrailer"
+
+readCurrentChunk ∷ HandleLike h
+ ⇒ Context h
+ → NormalInteraction
+ → ThreadId
+ → Int
+ → Lazy.ByteString
+ → ChunkReceivingState
+ → IO ()
+readCurrentChunk ctx ni@(NI {..}) rsrcTid wanted = go
+ where
+ go ∷ Lazy.ByteString → ChunkReceivingState → IO ()
+ go input Initial
+ = case LP.parse chunkHeader input of
+ LP.Done input' chunkLen
+ | chunkLen ≡ 0
+ → gotFinalChunk input'
+ | otherwise
+ → gotChunk input' chunkLen
+ LP.Fail _ eCtx e
+ → chunkWasMalformed rsrcTid eCtx e
+ "readCurrentChunk: chunkHeader"
+ go input (InChunk chunkLen)
+ = gotChunk input chunkLen
-seekNextChunk ∷ Interaction → Lazy.ByteString → IO ()
-seekNextChunk itr input
- = case LP.parse chunkHeaderP input of
- LP.Done input' len
- | len ≡ 0 -- Final chunk
- → case LP.parse chunkTrailerP input' of
+ gotChunk ∷ Lazy.ByteString → Int → IO ()
+ gotChunk input chunkLen
+ = do let bytesToRead = min wanted chunkLen
+ (block, input') = Lazy.splitAt (fromIntegral bytesToRead) input
+ block' = Strict.concat $ Lazy.toChunks block
+ actualReadBytes = Strict.length block'
+ chunkLen' = chunkLen - actualReadBytes
+ atomically $ putTMVar niReceivedBody block'
+ if chunkLen' ≡ 0 then
+ case LP.parse chunkFooter input' of
LP.Done input'' _
- → do writeTVar (itrReqChunkIsOver itr) True
- acceptRequest input''
- LP.Fail _ _ _
- → chunkWasMalformed itr
- | otherwise -- Non-final chunk
- → do observeChunkedRequest itr input'
- LP.Fail _ _ _
- → chunkWasMalformed itr
+ → waitForReceiveChunkedBodyReq ctx ni rsrcTid input'' Initial
+ LP.Fail _ eCtx e
+ → chunkWasMalformed rsrcTid eCtx e
+ "readCurrentChunk: chunkFooter"
+ else
+ waitForReceiveChunkedBodyReq ctx ni rsrcTid input' $ InChunk chunkLen'
-chunkWasMalformed ∷ Interaction → IO ()
-chunkWasMalformed itr
- = atomically $
- do setResponseStatus BadRequest
- writeTVar (itrWillClose itr) True
- writeTVar (itrState itr) Done
- writeDefaultPage itr
- postprocess itr
+ gotFinalChunk ∷ Lazy.ByteString → IO ()
+ gotFinalChunk input
+ = do atomically $ putTMVar niReceivedBody (∅)
+ case LP.parse chunkTrailer input of
+ LP.Done input' _
+ → acceptRequest ctx input'
+ LP.Fail _ eCtx e
+ → chunkWasMalformed rsrcTid eCtx e
+ "readCurrentChunk: chunkTrailer"
+
+chunkWasMalformed ∷ ThreadId → [String] → String → String → IO ()
+chunkWasMalformed tid eCtx e msg
+ = let abo = mkAbortion BadRequest [("Connection", "close")]
+ $ Just
+ $ "chunkWasMalformed: "
+ ⊕ T.pack msg
+ ⊕ ": "
+ ⊕ T.pack (intercalate ", " eCtx)
+ ⊕ ": "
+ ⊕ T.pack e
+ in
+ throwTo tid abo
-observeNonChunkedRequest ∷ Interaction → Lazy.ByteString → IO ()
-observeNonChunkedRequest itr input
+waitForReceiveNonChunkedBodyReqForTheFirstTime ∷ HandleLike h
+ ⇒ Context h
+ → NormalInteraction
+ → Lazy.ByteString
+ → Int
+ → IO ()
+waitForReceiveNonChunkedBodyReqForTheFirstTime ctx ni@(NI {..}) input bodyLen
= join $
atomically $
- do wantedM ← readTVar $ itrReqBodyWanted itr
- if isNothing wantedM then
- do wasteAll ← readTVar itr itrReqBodyWasteAll id
- if wasteAll then
- wasteNonChunkedRequestBody itr input
- else
- retry
- else
- readNonChunkedRequestBody itr input
+ do req ← takeTMVar niReceiveBodyReq
+ case req of
+ ReceiveBody wanted
+ → do putTMVar niSendContinue niExpectedContinue
+ return $ readNonChunkedRequestBody ctx ni input bodyLen wanted
+ WasteAll
+ → do putTMVar niSendContinue False
+ return $ wasteNonChunkedRequestBody ctx input bodyLen
-wasteNonChunkedRequestBody ∷ Interaction → Lazy.ByteString → Maybe Int → IO ()
-wasteNonChunkedRequestBody itr input remaining
- = do let input' = case remaining of
- Just len → Lazy.drop len input
- Nothing → (∅)
- writeTVar (itrReqChunkIsOver itr) True
- acceptRequest input'
+waitForReceiveNonChunkedBodyReq ∷ HandleLike h
+ ⇒ Context h
+ → NormalInteraction
+ → Lazy.ByteString
+ → Int
+ → IO ()
+waitForReceiveNonChunkedBodyReq ctx ni@(NI {..}) input bodyLen
+ = do req ← atomically $ takeTMVar niReceiveBodyReq
+ case req of
+ ReceiveBody wanted
+ → readNonChunkedRequestBody ctx ni input bodyLen wanted
+ WasteAll
+ → wasteNonChunkedRequestBody ctx input bodyLen
-readNonChunkedRequestBody ∷ Interaction → Lazy.ByteString → Int → Maybe Int → IO ()
-readNonChunkedRequestBody itr input wanted remaining
- = do let bytesToRead = fromIntegral $ maybe wanted (min wanted) remaining
- (chunk, input') = Lazy.splitAt bytesToRead input
- actualReadBytes = fromIntegral $ Lazy.length chunk
- newRemaining = (- actualReadBytes) <$> remaining
- isOver = actualReadBytes < bytesToRead ∨ newRemaining ≡ Just 0
- writeTVar (itrReqChunkIsOver itr) isOver
- writeTVar (itrReqBodyWanted itr) Nothing
- writeTVar (itrReceivedBody itr) chunk
- writeTVar (itrReceivedBodyLen itr) actualReadBytes
- if isOver then
- acceptRequest input'
- else
- observeNonChunkedRequest itr input'
+wasteNonChunkedRequestBody ∷ HandleLike h
+ ⇒ Context h
+ → Lazy.ByteString
+ → Int
+ → IO ()
+wasteNonChunkedRequestBody ctx input bodyLen
+ = do let input' = Lazy.drop (fromIntegral bodyLen) input
+ acceptRequest ctx input'
+
+readNonChunkedRequestBody ∷ HandleLike h
+ ⇒ Context h
+ → NormalInteraction
+ → Lazy.ByteString
+ → Int
+ → Int
+ → IO ()
+readNonChunkedRequestBody ctx ni@(NI {..}) input bodyLen wanted
+ | bodyLen ≡ 0 = gotEndOfRequest
+ | otherwise = gotBody
+ where
+ gotBody ∷ IO ()
+ gotBody
+ = do let bytesToRead = min wanted bodyLen
+ (block, input') = Lazy.splitAt (fromIntegral bytesToRead) input
+ block' = Strict.concat $ Lazy.toChunks block
+ actualReadBytes = Strict.length block'
+ bodyLen' = bodyLen - actualReadBytes
+ atomically $ putTMVar niReceivedBody block'
+ waitForReceiveNonChunkedBodyReq ctx ni input' bodyLen'
-enqueue ∷ HandleLike h ⇒ Context h → Interaction → STM ()
-enqueue (Context {..}) itr
- = do queue ← readTVar cQueue
- writeTVar cQueue (itr ⊲ queue)
+ gotEndOfRequest ∷ IO ()
+ gotEndOfRequest
+ = do atomically $ putTMVar niReceivedBody (∅)
+ acceptRequest ctx input
+
+enqueue ∷ (HandleLike h, Interaction i) ⇒ Context h → i → IO ()
+enqueue (Context {..}) = enqueue' cQueue
+
+enqueue' ∷ Interaction i ⇒ InteractionQueue → i → IO ()
+enqueue' tQueue itr
+ = atomically $
+ do queue ← readTVar tQueue
+ writeTVar tQueue (toInteraction itr ⊲ queue)
projects / Lucu.git / blobdiff