--- #hide
module Network.HTTP.Lucu.ResponseWriter
( responseWriter
)
where
-import qualified Data.ByteString.Lazy.Char8 as B
-import Data.ByteString.Lazy.Char8 (ByteString)
+import qualified Data.ByteString.Lazy.Char8 as C8
+import Control.Concurrent
import Control.Concurrent.STM
import Control.Exception
import Control.Monad
-import Data.Maybe
import qualified Data.Sequence as S
-import Data.Sequence (Seq, ViewR(..))
+import Data.Sequence (ViewR(..))
import Network.HTTP.Lucu.Config
+import Network.HTTP.Lucu.Format
+import Network.HTTP.Lucu.Headers
import Network.HTTP.Lucu.HttpVersion
import Network.HTTP.Lucu.Interaction
import Network.HTTP.Lucu.Postprocess
import Network.HTTP.Lucu.Response
import Prelude hiding (catch)
import System.IO
-import Text.Printf
-
-import Control.Concurrent
-import Debug.Trace
-import GHC.Conc (unsafeIOToSTM)
responseWriter :: Config -> Handle -> InteractionQueue -> ThreadId -> IO ()
-responseWriter cnf h tQueue readerTID
- = catch awaitSomethingToWrite $ \ exc ->
- case exc of
- IOException _ -> return ()
- AsyncException ThreadKilled -> return ()
- BlockedIndefinitely -> putStrLn "requestWriter: blocked indefinitely"
- _ -> print exc
+responseWriter !cnf !h !tQueue !readerTID
+ = awaitSomethingToWrite
+ `catches`
+ [ Handler (( \ _ -> return () ) :: IOException -> IO ())
+ , Handler ( \ ThreadKilled -> return () )
+ , Handler ( \ BlockedIndefinitely -> hPutStrLn stderr "requestWriter: blocked indefinitely" )
+ , Handler (( \ e -> hPutStrLn stderr (show e) ) :: SomeException -> IO ())
+ ]
where
awaitSomethingToWrite :: IO ()
awaitSomethingToWrite
- = do action
- <- atomically $
- do -- キューが空でなくなるまで待つ
- queue <- readTVar tQueue
- when (S.null queue)
- retry
- let _ :> itr = S.viewr queue
-
+ = {-# SCC "awaitSomethingToWrite" #-}
+ do action
+ <- atomically $!
+ -- キューが空でなくなるまで待つ
+ do queue <- readTVar tQueue
-- GettingBody 状態にあり、Continue が期待され
-- てゐて、それがまだ送信前なのであれば、
-- Continue を送信する。
- state <- readItr itr itrState id
+ case S.viewr queue of
+ EmptyR -> retry
+ _ :> itr -> do state <- readItr itr itrState id
- if state == GettingBody then
- writeContinueIfNecessary itr
- else
- if state >= DecidingBody then
- writeHeaderOrBodyIfNecessary itr
- else
- retry
+ if state == GettingBody then
+ writeContinueIfNecessary itr
+ else
+ if state >= DecidingBody then
+ writeHeaderOrBodyIfNecessary itr
+ else
+ retry
action
writeContinueIfNecessary :: Interaction -> STM (IO ())
writeContinueIfNecessary itr
- = do expectedContinue <- readItr itr itrExpectedContinue id
+ = {-# SCC "writeContinueIfNecessary" #-}
+ itr `seq`
+ do expectedContinue <- readItr itr itrExpectedContinue id
if expectedContinue then
do wroteContinue <- readItr itr itrWroteContinue id
if wroteContinue then
-- れば、ヘッダを出力する。ヘッダ出力後であり、bodyToSend が
-- 空でなければ、それを出力する。空である時は、もし状態が
-- Done であれば後処理をする。
- = do wroteHeader <- readItr itr itrWroteHeader id
+ = {-# SCC "writeHeaderOrBodyIfNecessary" #-}
+ itr `seq`
+ do wroteHeader <- readItr itr itrWroteHeader id
if not wroteHeader then
- return $ writeHeader itr
+ return $! writeHeader itr
else
do bodyToSend <- readItr itr itrBodyToSend id
- if B.null bodyToSend then
+ if C8.null bodyToSend then
do state <- readItr itr itrState id
if state == Done then
- return $ finalize itr
+ return $! finalize itr
else
retry
else
- return $ writeBodyChunk itr
+ return $! writeBodyChunk itr
writeContinue :: Interaction -> IO ()
writeContinue itr
- = do let cont = Response {
+ = {-# SCC "writeContinue" #-}
+ itr `seq`
+ do let cont = Response {
resVersion = HttpVersion 1 1
, resStatus = Continue
- , resHeaders = []
+ , resHeaders = emptyHeaders
}
cont' <- completeUnconditionalHeaders cnf cont
hPutResponse h cont'
hFlush h
- atomically $ writeItr itr itrWroteContinue True
+ atomically $! writeItr itr itrWroteContinue True
awaitSomethingToWrite
writeHeader :: Interaction -> IO ()
writeHeader itr
- = do res <- atomically $ do writeItr itr itrWroteHeader True
- readItr itr itrResponse id
+ = {-# SCC "writeHeader" #-}
+ itr `seq`
+ do res <- atomically $! do writeItr itr itrWroteHeader True
+ readItr itr itrResponse id
hPutResponse h res
hFlush h
awaitSomethingToWrite
writeBodyChunk :: Interaction -> IO ()
writeBodyChunk itr
- = do willDiscardBody <- atomically $ readItr itr itrWillDiscardBody id
- willChunkBody <- atomically $ readItr itr itrWillChunkBody id
- chunk <- atomically $ do chunk <- readItr itr itrBodyToSend id
- writeItr itr itrBodyToSend B.empty
- return chunk
+ = {-# SCC "writeBodyChunk" #-}
+ itr `seq`
+ do willDiscardBody <- atomically $! readItr itr itrWillDiscardBody id
+ willChunkBody <- atomically $! readItr itr itrWillChunkBody id
+ chunk <- atomically $! do chunk <- readItr itr itrBodyToSend id
+ writeItr itr itrBodyToSend C8.empty
+ return chunk
unless willDiscardBody
$ do if willChunkBody then
- do hPrintf h "%x\r\n" (toInteger $ B.length chunk)
- B.hPut h chunk
- hPutStr h "\r\n"
+ do hPutStr h (fmtHex False 0 $! fromIntegral $! C8.length chunk)
+ C8.hPut h (C8.pack "\r\n")
+ C8.hPut h chunk
+ C8.hPut h (C8.pack "\r\n")
else
- B.hPut h chunk
+ C8.hPut h chunk
hFlush h
awaitSomethingToWrite
finishBodyChunk :: Interaction -> IO ()
finishBodyChunk itr
- = do willDiscardBody <- atomically $ readItr itr itrWillDiscardBody id
- willChunkBody <- atomically $ readItr itr itrWillChunkBody id
+ = {-# SCC "finishBodyChunk" #-}
+ itr `seq`
+ do willDiscardBody <- atomically $! readItr itr itrWillDiscardBody id
+ willChunkBody <- atomically $! readItr itr itrWillChunkBody id
when (not willDiscardBody && willChunkBody)
- $ hPutStr h "0\r\n\r\n" >> hFlush h
+ $ C8.hPut h (C8.pack "0\r\n\r\n") >> hFlush h
finalize :: Interaction -> IO ()
finalize itr
- = do finishBodyChunk itr
- willClose <- atomically $ do queue <- readTVar tQueue
+ = {-# SCC "finalize" #-}
+ itr `seq`
+ do finishBodyChunk itr
+ willClose <- atomically $!
+ do queue <- readTVar tQueue
- let (remaining :> _) = S.viewr queue
- writeTVar tQueue remaining
+ case S.viewr queue of
+ EmptyR -> return () -- this should never happen
+ remaining :> _ -> writeTVar tQueue remaining
- readItr itr itrWillClose id
+ readItr itr itrWillClose id
if willClose then
-- reader は恐らく hWaitForInput してゐる最中なので、
-- スレッドを豫め殺して置かないとをかしくなる。
projects / Lucu.git / blobdiff