)
where
import Control.Applicative
-import Control.Concurrent.STM
-import Control.Exception
-import Control.Monad
+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.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 Data.Sequence.Unicode hiding ((∅))
+import Network.HTTP.Lucu.Config
+import Network.HTTP.Lucu.Chunk
+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.Internal
+import Network.HTTP.Lucu.Resource.Tree
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 handleBIOS
+ , Handler handleOthers
]
+ where
+ handleAsyncE ∷ AsyncException → IO ()
+ handleAsyncE ThreadKilled = return ()
+ handleAsyncE e = dump e
+
+ handleBIOS ∷ BlockedIndefinitelyOnSTM → IO ()
+ handleBIOS = dump
+
+ handleOthers ∷ SomeException → IO ()
+ handleOthers = dump
+
+ dump ∷ Exception e ⇒ e → IO ()
+ dump e
+ = do hPutStrLn stderr "requestReader caught an exception:"
+ hPutStrLn stderr (show $ toException e)
acceptRequest ∷ HandleLike h ⇒ Context h → Lazy.ByteString → IO ()
acceptRequest ctx@(Context {..}) input
-- 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.Done input' req → acceptParsableRequest ctx req input'
LP.Fail _ _ _ → acceptNonparsableRequest ctx BadRequest
acceptNonparsableRequest ∷ HandleLike h ⇒ Context h → StatusCode → IO ()
-acceptNonparsableRequest (Context {..}) status
- = do itr ← newInteraction cConfig cPort cAddr Nothing Nothing
+acceptNonparsableRequest ctx@(Context {..}) sc
+ = do itr ← newInteraction cConfig cPort cAddr Nothing (Left sc)
atomically $
- do setResponseStatus itr status
- writeTVar (itrWillClose itr) True
- writeTVar (itrState itr) Done
- writeDefaultPage itr
+ do writeTVar (itrState itr) Done
postprocess itr
- enqueue itr
+ enqueue ctx itr
acceptParsableRequest ∷ HandleLike h
⇒ Context h
→ Request
→ Lazy.ByteString
→ IO ()
-acceptParsableRequest (Context {..}) req input
+acceptParsableRequest ctx@(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)
+ $ do isErr ← (isError ∘ resStatus) <$> readTVar (itrResponse itr)
if isErr then
- acceptSemanticallyInvalidRequest itr input
+ acceptSemanticallyInvalidRequest ctx itr input
else
- acceptSemanticallyValidRequest itr (reqURI req) input
+ return $ acceptSemanticallyValidRequest ctx itr (reqURI req) input
-acceptSemanticallyInvalidRequest ∷ Interaction → Lazy.ByteString → STM (IO ())
-acceptSemanticallyInvalidRequest itr input
- = do writeTVar (itr itrState) Done
- writeDefaultPage itr
+acceptSemanticallyInvalidRequest ∷ HandleLike h
+ ⇒ Context h
+ → Interaction
+ → Lazy.ByteString
+ → STM (IO ())
+acceptSemanticallyInvalidRequest ctx itr input
+ = do writeTVar (itrState itr) Done
postprocess itr
- enqueue itr
- return $ acceptRequest input
+ enqueue ctx itr
+ return $ acceptRequest ctx input
acceptSemanticallyValidRequest ∷ HandleLike h
⇒ Context h
→ URI
→ Lazy.ByteString
→ IO ()
-acceptSemanticallyValidRequest (Context {..}) itr uri input
+acceptSemanticallyValidRequest ctx@(Context {..}) itr uri input
= do rsrcM ← findResource cResTree cFallbacks uri
case rsrcM of
Nothing
- → acceptRequestForNonexistentResource itr input
+ → acceptRequestForNonexistentResource ctx itr input
Just (rsrcPath, rsrcDef)
- → acceptRequestForExistentResource itr input rsrcPath rsrcDef
+ → acceptRequestForExistentResource ctx itr input rsrcPath rsrcDef
-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
+acceptRequestForNonexistentResource ∷ HandleLike h
+ ⇒ Context h
+ → Interaction
+ → Lazy.ByteString
+ → IO ()
+acceptRequestForNonexistentResource ctx itr input
+ = do atomically $
+ do setResponseStatus itr NotFound
+ writeTVar (itrState itr) Done
+ postprocess itr
+ enqueue ctx itr
+ acceptRequest ctx input
-acceptRequestForExistentResource ∷ Interaction → Lazy.ByteString → [String] → ResourceDef → STM (IO ())
-acceptRequestForExistentResource oldItr input rsrcPath rsrcDef
+acceptRequestForExistentResource ∷ HandleLike h
+ ⇒ Context h
+ → Interaction
+ → Lazy.ByteString
+ → [Strict.ByteString]
+ → ResourceDef
+ → IO ()
+acceptRequestForExistentResource ctx 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
+ atomically $ enqueue ctx itr
+ do _ ← spawnResource rsrcDef itr
+ if reqMustHaveBody $ fromJust $ itrRequest itr then
+ waitForReceiveBodyReq ctx itr 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
+ → Interaction
+ → Lazy.ByteString
+ → IO ()
+waitForReceiveBodyReq ctx itr input
+ = case fromJust $ itrReqBodyLength itr of
+ Chunked
+ → waitForReceiveChunkedBodyReqForTheFirstTime ctx itr input
+ Fixed len
+ → waitForReceiveNonChunkedBodyReqForTheFirstTime ctx itr input len
-observeChunkedRequest ∷ Interaction → Lazy.ByteString → IO ()
-observeChunkedRequest itr input
+-- Toooooo long name for a function...
+waitForReceiveChunkedBodyReqForTheFirstTime ∷ HandleLike h
+ ⇒ Context h
+ → Interaction
+ → Lazy.ByteString
+ → IO ()
+waitForReceiveChunkedBodyReqForTheFirstTime ctx itr@(Interaction {..}) 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 itrReceiveBodyReq
+ case req of
+ ReceiveBody wanted
+ → do putTMVar itrSendContinue $ fromJust itrExpectedContinue
+ return $ readCurrentChunk ctx itr input Initial wanted
+ WasteAll
+ → do putTMVar itrSendContinue False
+ return $ wasteAllChunks ctx itr input Initial
+
+waitForReceiveChunkedBodyReq ∷ HandleLike h
+ ⇒ Context h
+ → Interaction
+ → Lazy.ByteString
+ → ChunkReceivingState
+ → IO ()
+waitForReceiveChunkedBodyReq ctx itr@(Interaction {..}) input st
+ = do req ← atomically $ takeTMVar itrReceiveBodyReq
+ case req of
+ ReceiveBody wanted
+ → readCurrentChunk ctx itr input st wanted
+ WasteAll
+ → wasteAllChunks ctx itr input st
+
+wasteAllChunks ∷ HandleLike h
+ ⇒ Context h
+ → Interaction
+ → Lazy.ByteString
+ → ChunkReceivingState
+ → IO ()
+wasteAllChunks ctx itr = go
+ where
+ go ∷ Lazy.ByteString → ChunkReceivingState → IO ()
+ go input Initial
+ = case LP.parse chunkHeaderP input of
+ LP.Done input' chunkLen
+ | chunkLen ≡ 0 → gotFinalChunk input'
+ | otherwise → gotChunk input' chunkLen
+ LP.Fail _ _ _
+ → chunkWasMalformed itr
+ 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 chunkFooterP input' of
+ LP.Done input'' _
+ → go input'' Initial
+ LP.Fail _ _ _
+ → chunkWasMalformed itr
-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''
+ gotFinalChunk ∷ Lazy.ByteString → IO ()
+ gotFinalChunk input
+ = case LP.parse chunkFooterP input of
+ LP.Done input' _
+ → case LP.parse chunkTrailerP input' of
+ LP.Done input'' _
+ → acceptRequest ctx input''
+ LP.Fail _ _ _
+ → chunkWasMalformed itr
LP.Fail _ _ _
→ chunkWasMalformed itr
- | otherwise
- = seekNextChunk itr input
-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
+readCurrentChunk ∷ HandleLike h
+ ⇒ Context h
+ → Interaction
+ → Lazy.ByteString
+ → ChunkReceivingState
+ → Int
+ → IO ()
+readCurrentChunk ctx itr@(Interaction {..}) input0 st0 wanted
+ = go input0 st0
+ where
+ go ∷ Lazy.ByteString → ChunkReceivingState → IO ()
+ go input Initial
+ = case LP.parse chunkHeaderP input of
+ LP.Done input' chunkLen
+ | chunkLen ≡ 0
+ → gotFinalChunk input'
+ | otherwise
+ → gotChunk input' chunkLen
+ LP.Fail _ _ _
+ → chunkWasMalformed itr
+ 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 itrReceivedBody block'
+ if chunkLen' ≡ 0 then
+ case LP.parse chunkFooterP input' of
LP.Done input'' _
- → do writeTVar (itrReqChunkIsOver itr) True
- acceptRequest input''
+ → waitForReceiveChunkedBodyReq ctx itr input'' Initial
LP.Fail _ _ _
→ chunkWasMalformed itr
- | otherwise -- Non-final chunk
- → do observeChunkedRequest itr input'
- LP.Fail _ _ _
- → chunkWasMalformed itr
+ else
+ waitForReceiveChunkedBodyReq ctx itr input' $ InChunk chunkLen'
+
+ gotFinalChunk ∷ Lazy.ByteString → IO ()
+ gotFinalChunk input
+ = do atomically $ putTMVar itrReceivedBody (∅)
+ case LP.parse chunkFooterP input of
+ LP.Done input' _
+ → case LP.parse chunkTrailerP input' of
+ LP.Done input'' _
+ → acceptRequest ctx input''
+ LP.Fail _ _ _
+ → chunkWasMalformed itr
+ LP.Fail _ _ _
+ → chunkWasMalformed itr
chunkWasMalformed ∷ Interaction → IO ()
chunkWasMalformed itr
+ -- FIXME: This is a totally wrong way to abort!
= atomically $
- do setResponseStatus BadRequest
- writeTVar (itrWillClose itr) True
- writeTVar (itrState itr) Done
- writeDefaultPage itr
- postprocess itr
+ do setResponseStatus itr BadRequest
+ writeTVar (itrWillClose itr) True
+ writeTVar (itrState itr) Done
+ postprocess itr
-observeNonChunkedRequest ∷ Interaction → Lazy.ByteString → IO ()
-observeNonChunkedRequest itr input
+waitForReceiveNonChunkedBodyReqForTheFirstTime ∷ HandleLike h
+ ⇒ Context h
+ → Interaction
+ → Lazy.ByteString
+ → Int
+ → IO ()
+waitForReceiveNonChunkedBodyReqForTheFirstTime ctx itr@(Interaction {..}) 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 itrReceiveBodyReq
+ case req of
+ ReceiveBody wanted
+ → do putTMVar itrSendContinue $ fromJust itrExpectedContinue
+ return $ readNonChunkedRequestBody ctx itr input bodyLen wanted
+ WasteAll
+ → do putTMVar itrSendContinue 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
+ → Interaction
+ → Lazy.ByteString
+ → Int
+ → IO ()
+waitForReceiveNonChunkedBodyReq ctx itr@(Interaction {..}) input bodyLen
+ = do req ← atomically $ takeTMVar itrReceiveBodyReq
+ case req of
+ ReceiveBody wanted
+ → readNonChunkedRequestBody ctx itr input bodyLen wanted
+ WasteAll
+ → wasteNonChunkedRequestBody ctx input bodyLen
+
+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
+ → Interaction
+ → Lazy.ByteString
+ → Int
+ → Int
+ → IO ()
+readNonChunkedRequestBody ctx itr@(Interaction {..}) 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 itrReceivedBody block'
+ waitForReceiveNonChunkedBodyReq ctx itr 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'
+ gotEndOfRequest ∷ IO ()
+ gotEndOfRequest
+ = do atomically $ putTMVar itrReceivedBody (∅)
+ acceptRequest ctx input
enqueue ∷ HandleLike h ⇒ Context h → Interaction → STM ()
enqueue (Context {..}) itr
projects / Lucu.git / blobdiff