@@ -1,97 +1,72 @@
1−{-# LANGUAGE BangPatterns #-}
2{-# LANGUAGE CPP #-}
1{-# LANGUAGE CPP #-}
3{-# LANGUAGE OverloadedStrings #-}
2{-# LANGUAGE OverloadedStrings #-}
4−{-# LANGUAGE PackageImports #-}
5−{-# LANGUAGE PatternGuards #-}
6−{-# LANGUAGE RecordWildCards #-}
7{-# LANGUAGE ScopedTypeVariables #-}
3{-# LANGUAGE ScopedTypeVariables #-}
8{-# LANGUAGE TupleSections #-}
4{-# LANGUAGE TupleSections #-}
9−{-# LANGUAGE ViewPatterns #-}
10{-# OPTIONS_GHC -fno-warn-deprecations #-}
5{-# OPTIONS_GHC -fno-warn-deprecations #-}
12module Network.Wai.Handler.Warp.Run where
7module Network.Wai.Handler.Warp.Run where
14−import "iproute" Data.IP (toHostAddress, toHostAddress6)
15import Control.Arrow (first)
9import Control.Arrow (first)
10+import Control.Concurrent (threadDelay)
16import qualified Control.Concurrent as Conc (yield)
11import qualified Control.Concurrent as Conc (yield)
17import Control.Exception as E
12import Control.Exception as E
13+import Control.Monad (when, unless, void)
14+import Data.ByteString (ByteString)
18import qualified Data.ByteString as S
15import qualified Data.ByteString as S
19import Data.Char (chr)
16import Data.Char (chr)
17+import Data.IP (toHostAddress, toHostAddress6)
20import Data.IORef (IORef, newIORef, readIORef, writeIORef)
18import Data.IORef (IORef, newIORef, readIORef, writeIORef)
21import Data.Streaming.Network (bindPortTCP)
19import Data.Streaming.Network (bindPortTCP)
22−import Foreign.C.Error (Errno(..), eCONNABORTED)
20+import Network (sClose, Socket)
23−import GHC.IO.Exception (IOException(..))
21+import Network.Socket (accept, withSocketsDo, SockAddr(SockAddrInet, SockAddrInet6))
24−import qualified Network.HTTP2 as H2
25−import Network.Socket (Socket, close, accept, withSocketsDo, SockAddr(SockAddrInet, SockAddrInet6), setSocketOption, SocketOption(..))
26−#if MIN_VERSION_network(3,1,1)
27−import Network.Socket (gracefulClose)
29import qualified Network.Socket.ByteString as Sock
22import qualified Network.Socket.ByteString as Sock
30import Network.Wai
23import Network.Wai
31−import Network.Wai.Internal (ResponseReceived (ResponseReceived))
32−import System.Environment (lookupEnv)
33−import qualified System.TimeManager as T
34−import System.Timeout (timeout)
36import Network.Wai.Handler.Warp.Buffer
24import Network.Wai.Handler.Warp.Buffer
37import Network.Wai.Handler.Warp.Counter
25import Network.Wai.Handler.Warp.Counter
38import qualified Network.Wai.Handler.Warp.Date as D
26import qualified Network.Wai.Handler.Warp.Date as D
39import qualified Network.Wai.Handler.Warp.FdCache as F
27import qualified Network.Wai.Handler.Warp.FdCache as F
40−import qualified Network.Wai.Handler.Warp.FileInfoCache as I
41−import Network.Wai.Handler.Warp.HTTP2 (http2)
42−import Network.Wai.Handler.Warp.HTTP2.Types (isHTTP2)
43import Network.Wai.Handler.Warp.Header
28import Network.Wai.Handler.Warp.Header
44−import Network.Wai.Handler.Warp.Imports hiding (readInt)
45import Network.Wai.Handler.Warp.ReadInt
29import Network.Wai.Handler.Warp.ReadInt
46import Network.Wai.Handler.Warp.Recv
30import Network.Wai.Handler.Warp.Recv
47import Network.Wai.Handler.Warp.Request
31import Network.Wai.Handler.Warp.Request
48import Network.Wai.Handler.Warp.Response
32import Network.Wai.Handler.Warp.Response
49import Network.Wai.Handler.Warp.SendFile
33import Network.Wai.Handler.Warp.SendFile
50import Network.Wai.Handler.Warp.Settings
34import Network.Wai.Handler.Warp.Settings
35+import qualified Network.Wai.Handler.Warp.Timeout as T
51import Network.Wai.Handler.Warp.Types
36import Network.Wai.Handler.Warp.Types
52−
37+import Network.Wai.Internal (ResponseReceived (ResponseReceived))
38+import System.Environment (getEnvironment)
39+import System.IO.Error (isFullErrorType, ioeGetErrorType)
54#if WINDOWS
41#if WINDOWS
55import Network.Wai.Handler.Warp.Windows
42import Network.Wai.Handler.Warp.Windows
44+import System.Posix.IO (FdOption(CloseOnExec), setFdOption)
57import Network.Socket (fdSocket)
45import Network.Socket (fdSocket)
60−-- | Creating 'Connection' for plain HTTP based on a given socket.
48+-- | Default action value for 'Connection'.
61−socketConnection :: Settings -> Socket -> IO Connection
49+socketConnection :: Socket -> IO Connection
62−#if MIN_VERSION_network(3,1,1)
50+socketConnection s = do
63−socketConnection set s = do
65−socketConnection _ s = do
67 bufferPool <- newBufferPool
51 bufferPool <- newBufferPool
68 writeBuf <- allocateBuffer bufferSize
52 writeBuf <- allocateBuffer bufferSize
69 let sendall = Sock.sendAll s
53 let sendall = Sock.sendAll s
70− isH2 <- newIORef False -- HTTP/1.x
71 return Connection {
54 return Connection {
72 connSendMany = Sock.sendMany s
55 connSendMany = Sock.sendMany s
73 , connSendAll = sendall
56 , connSendAll = sendall
74− , connSendFile = sendFile s writeBuf bufferSize sendall
57+ , connSendFile = defaultSendFile s writeBuf bufferSize sendall
75−#if MIN_VERSION_network(3,1,1)
58+ , connClose = sClose s >> freeBuffer writeBuf
78− let tm = if h2 then settingsGracefulCloseTimeout2 set
79− else settingsGracefulCloseTimeout1 set
83− gracefulClose s tm `E.catch` \(E.SomeException _) -> return ()
85− , connClose = close s
87− , connFree = freeBuffer writeBuf
88 , connRecv = receive s bufferPool
59 , connRecv = receive s bufferPool
89− , connRecvBuf = receiveBuf s
60+ , connBufferPool = bufferPool
90 , connWriteBuffer = writeBuf
61 , connWriteBuffer = writeBuf
91 , connBufferSize = bufferSize
62 , connBufferSize = bufferSize
65+#if __GLASGOW_HASKELL__ < 702
66+allowInterrupt :: IO ()
67+allowInterrupt = unblock $ return ()
95-- | Run an 'Application' on the given port.
70-- | Run an 'Application' on the given port.
96-- This calls 'runSettings' with 'defaultSettings'.
71-- This calls 'runSettings' with 'defaultSettings'.
97run :: Port -> Application -> IO ()
72run :: Port -> Application -> IO ()
@@ -104,7 +79,7 @@ run p = runSettings defaultSettings { settingsPort = p }
104-- Since 3.0.9
79-- Since 3.0.9
105runEnv :: Port -> Application -> IO ()
80runEnv :: Port -> Application -> IO ()
106runEnv p app = do
81runEnv p app = do
107− mp <- lookupEnv "PORT"
82+ mp <- fmap (lookup "PORT") getEnvironment
109 maybe (run p app) runReadPort mp
84 maybe (run p app) runReadPort mp
@@ -121,7 +96,7 @@ runSettings :: Settings -> Application -> IO ()
121runSettings set app = withSocketsDo $
96runSettings set app = withSocketsDo $
123 (bindPortTCP (settingsPort set) (settingsHost set))
98 (bindPortTCP (settingsPort set) (settingsHost set))
125 (\socket -> do
100 (\socket -> do
126 setSocketCloseOnExec socket
101 setSocketCloseOnExec socket
127 runSettingsSocket set socket app)
102 runSettingsSocket set socket app)
@@ -149,12 +124,10 @@ runSettingsSocket set socket app = do
149 (s, sa) <- accept socket
124 (s, sa) <- accept socket
151 setSocketCloseOnExec s
126 setSocketCloseOnExec s
152− -- NoDelay causes an error for AF_UNIX.
127+ conn <- socketConnection s
153− setSocketOption s NoDelay 1 `E.catch` \(E.SomeException _) -> return ()
154− conn <- socketConnection set s
155 return (conn, sa)
128 return (conn, sa)
157− closeListenSocket = close socket
130+ closeListenSocket = sClose socket
159-- | The connection setup action would be expensive. A good example
132-- | The connection setup action would be expensive. A good example
160-- is initialization of TLS.
133-- is initialization of TLS.
@@ -176,9 +149,9 @@ runSettingsConnection set getConn app = runSettingsConnectionMaker set getConnMa
176-- (i.e. plain HTTP) then calls 'runSettingsConnectionMakerSecure'.
149-- (i.e. plain HTTP) then calls 'runSettingsConnectionMakerSecure'.
177runSettingsConnectionMaker :: Settings -> IO (IO Connection, SockAddr) -> Application -> IO ()
150runSettingsConnectionMaker :: Settings -> IO (IO Connection, SockAddr) -> Application -> IO ()
178runSettingsConnectionMaker x y =
151runSettingsConnectionMaker x y =
179− runSettingsConnectionMakerSecure x (toTCP <$> y)
152+ runSettingsConnectionMakerSecure x (go y)
181− toTCP = first ((, TCP) <$>)
154+ go = fmap (first (fmap (, TCP)))
183----------------------------------------------------------------
156----------------------------------------------------------------
@@ -192,26 +165,25 @@ runSettingsConnectionMakerSecure :: Settings -> IO (IO (Connection, Transport),
192runSettingsConnectionMakerSecure set getConnMaker app = do
165runSettingsConnectionMakerSecure set getConnMaker app = do
193 settingsBeforeMainLoop set
166 settingsBeforeMainLoop set
194 counter <- newCounter
167 counter <- newCounter
195− withII $ acceptConnection set getConnMaker app counter
168+
169+ D.withDateCache $ \dc ->
170+ F.withFdCache fdCacheDurationInSeconds $ \fc ->
171+ withTimeoutManager $ \tm ->
172+ acceptConnection set getConnMaker app dc fc tm counter
197− withII action =
174+ fdCacheDurationInSeconds = settingsFdCacheDuration set * 1000000
198− withTimeoutManager $ \tm ->
199− D.withDateCache $ \dc ->
200− F.withFdCache fdCacheDurationInSeconds $ \fdc ->
201− I.withFileInfoCache fdFileInfoDurationInSeconds $ \fic -> do
202− let ii = InternalInfo tm dc fdc fic
205− !fdCacheDurationInSeconds = settingsFdCacheDuration set * 1000000
206− !fdFileInfoDurationInSeconds = settingsFileInfoCacheDuration set * 1000000
207− !timeoutInSeconds = settingsTimeout set * 1000000
208 withTimeoutManager f = case settingsManager set of
175 withTimeoutManager f = case settingsManager set of
209 Just tm -> f tm
176 Just tm -> f tm
210 Nothing -> bracket
177 Nothing -> bracket
211− (T.initialize timeoutInSeconds)
178+ (T.initialize $ settingsTimeout set * 1000000)
212 T.stopManager
179 T.stopManager
182+onE :: Settings -> Maybe Request -> SomeException -> IO ()
183+onE set mreq e = case fromException e of
184+ Just (NotEnoughLines []) -> return ()
185+ _ -> settingsOnException set mreq e
215-- Note that there is a thorough discussion of the exception safety of the
187-- Note that there is a thorough discussion of the exception safety of the
216-- following code at: https://github.com/yesodweb/wai/issues/146
188-- following code at: https://github.com/yesodweb/wai/issues/146
@@ -228,20 +200,17 @@ runSettingsConnectionMakerSecure set getConnMaker app = do
228acceptConnection :: Settings
200acceptConnection :: Settings
229 -> IO (IO (Connection, Transport), SockAddr)
201 -> IO (IO (Connection, Transport), SockAddr)
230 -> Application
202 -> Application
204+ -> Maybe F.MutableFdCache
231 -> Counter
206 -> Counter
234−acceptConnection set getConnMaker app counter ii = do
208+acceptConnection set getConnMaker app dc fc tm counter = do
235 -- First mask all exceptions in acceptLoop. This is necessary to
209 -- First mask all exceptions in acceptLoop. This is necessary to
236 -- ensure that no async exception is throw between the call to
210 -- ensure that no async exception is throw between the call to
237 -- acceptNewConnection and the registering of connClose.
211 -- acceptNewConnection and the registering of connClose.
238− --
212+ void $ mask_ $ acceptLoop
239− -- acceptLoop can be broken by closing the listing socket.
213+ gracefulShutdown counter
240− void $ mask_ acceptLoop
241− -- In some cases, we want to stop Warp here without graceful shutdown.
242− -- So, async exceptions are allowed here.
243− -- That's why `finally` is not used.
244− gracefulShutdown set counter
246 acceptLoop = do
215 acceptLoop = do
247 -- Allow async exceptions before receiving the next connection maker.
216 -- Allow async exceptions before receiving the next connection maker.
@@ -258,21 +227,24 @@ acceptConnection set getConnMaker app counter ii = do
258 case mx of
227 case mx of
259 Nothing -> return ()
228 Nothing -> return ()
260 Just (mkConn, addr) -> do
229 Just (mkConn, addr) -> do
261− fork set mkConn addr app counter ii
230+ fork set mkConn addr app dc fc tm counter
262 acceptLoop
231 acceptLoop
264 acceptNewConnection = do
233 acceptNewConnection = do
265 ex <- try getConnMaker
234 ex <- try getConnMaker
266 case ex of
235 case ex of
267 Right x -> return $ Just x
236 Right x -> return $ Just x
268− Left e -> do
237+ Left e -> do
269− let eConnAborted = getErrno eCONNABORTED
238+ onE set Nothing $ toException e
270− getErrno (Errno cInt) = cInt
239+ if isFullErrorType (ioeGetErrorType e) then do
271− if ioe_errno e == Just eConnAborted
240+ -- "resource exhausted (Too many open files)" may
272− then acceptNewConnection
241+ -- happen by accept(). Wait a second hoping that
273− else do
242+ -- resource will be available.
274− settingsOnException set Nothing $ toException e
243+ threadDelay 1000000
275− return Nothing
244+ acceptNewConnection
246+ -- Assuming the listen socket is closed.
277-- Fork a new worker thread for this connection maker, and ask for a
249-- Fork a new worker thread for this connection maker, and ask for a
278-- function to unmask (i.e., allow async exceptions to be thrown).
250-- function to unmask (i.e., allow async exceptions to be thrown).
@@ -280,97 +252,63 @@ fork :: Settings
280 -> IO (Connection, Transport)
252 -> IO (Connection, Transport)
281 -> SockAddr
253 -> SockAddr
282 -> Application
254 -> Application
256+ -> Maybe F.MutableFdCache
283 -> Counter
258 -> Counter
286−fork set mkConn addr app counter ii = settingsFork set $ \unmask ->
260+fork set mkConn addr app dc fc tm counter = settingsFork set $ \ unmask ->
287− -- Call the user-supplied on exception code if any
261+ -- Run the connection maker to get a new connection, and ensure
288− -- exceptions are thrown.
262+ -- that the connection is closed. If the mkConn call throws an
289− handle (settingsOnException set Nothing) $
263+ -- exception, we will leak the connection. If the mkConn call is
290− -- Run the connection maker to get a new connection, and ensure
264+ -- vulnerable to attacks (e.g., Slowloris), we do nothing to
291− -- that the connection is closed. If the mkConn call throws an
265+ -- protect the server. It is therefore vital that mkConn is well
292− -- exception, we will leak the connection. If the mkConn call is
266+ -- vetted.
293− -- vulnerable to attacks (e.g., Slowloris), we do nothing to
267+ --
294− -- protect the server. It is therefore vital that mkConn is well
268+ -- We grab the connection before registering timeouts since the
295− -- vetted.
269+ -- timeouts will be useless during connection creation, due to the
296− --
270+ -- fact that async exceptions are still masked.
297− -- We grab the connection before registering timeouts since the
271+ bracket mkConn closeConn $ \(conn, transport) ->
298− -- timeouts will be useless during connection creation, due to the
299− -- fact that async exceptions are still masked.
300− bracket mkConn cleanUp (serve unmask)
302− cleanUp (conn, _) = connClose conn `finally` connFree conn
304 -- We need to register a timeout handler for this thread, and
273 -- We need to register a timeout handler for this thread, and
305 -- cancel that handler as soon as we exit.
274 -- cancel that handler as soon as we exit.
306− serve unmask (conn, transport) = bracket register cancel $ \th -> do
275+ bracket (T.registerKillThread tm) T.cancel $ \th ->
307− -- We now have fully registered a connection close handler in
276+
308− -- the case of all exceptions, so it is safe to once again
277+ let ii = InternalInfo th fc dc
309− -- allow async exceptions.
278+ -- We now have fully registered a connection close handler
310− unmask .
279+ -- in the case of all exceptions, so it is safe to one
311− -- Call the user-supplied code for connection open and
280+ -- again allow async exceptions.
312− -- close events
281+ in unmask .
313− bracket (onOpen addr) (onClose addr) $ \goingon ->
282+ -- Call the user-supplied on exception code if any
314− -- Actually serve this connection. bracket with closeConn
283+ -- exceptions are thrown.
315− -- above ensures the connection is closed.
284+ handle (onE set Nothing) .
316− when goingon $ serveConnection conn ii th addr transport set app
285+
317− where
286+ -- Call the user-supplied code for connection open and close events
318− register = T.registerKillThread (timeoutManager ii) (connClose conn)
287+ bracket (onOpen addr) (onClose addr) $ \goingon ->
319− cancel = T.cancel
288+
289+ -- Actually serve this connection.
290+ -- bracket with closeConn above ensures the connection is closed.
291+ when goingon $ serveConnection conn ii addr transport set app
293+ closeConn (conn, _transport) = connClose conn
321 onOpen adr = increase counter >> settingsOnOpen set adr
295 onOpen adr = increase counter >> settingsOnOpen set adr
322 onClose adr _ = decrease counter >> settingsOnClose set adr
296 onClose adr _ = decrease counter >> settingsOnClose set adr
324serveConnection :: Connection
298serveConnection :: Connection
325 -> InternalInfo
299 -> InternalInfo
327 -> SockAddr
300 -> SockAddr
328 -> Transport
301 -> Transport
329 -> Settings
302 -> Settings
330 -> Application
303 -> Application
332−serveConnection conn ii th origAddr transport settings app = do
305+serveConnection conn ii origAddr transport settings app = do
333− -- fixme: Upgrading to HTTP/2 should be supported.
334− (h2,bs) <- if isHTTP2 transport then
337− bs0 <- connRecv conn
338− if S.length bs0 >= 4 && "PRI " `S.isPrefixOf` bs0 then
342 istatus <- newIORef False
306 istatus <- newIORef False
343− if settingsHTTP2Enabled settings && h2 then do
307+ src <- mkSource (connSource conn th istatus)
344− rawRecvN <- makeReceiveN bs (connRecv conn) (connRecvBuf conn)
308+ addr <- getProxyProtocolAddr src
345− -- This thread becomes the sender in http2 library.
309+ http1 addr istatus src `E.catch` \e -> do
346− -- In the case of event source, one request comes and one
310+ sendErrorResponse addr istatus e
347− -- worker gets busy. But it is likely that the receiver does
311+ throwIO (e :: SomeException)
348− -- not receive any data at all while the sender is sending
349− -- output data from the worker. It's not good enough to tickle
350− -- the time handler in the receiver only. So, we should tickle
351− -- the time handler in both the receiver and the sender.
352− let recvN = wrappedRecvN th istatus (settingsSlowlorisSize settings) rawRecvN
353− sendBS x = connSendAll conn x >> T.tickle th
356− setConnHTTP2 conn True
357− http2 conn transport ii origAddr settings recvN sendBS app
359− src <- mkSource (wrappedRecv conn th istatus (settingsSlowlorisSize settings))
360− writeIORef istatus True
361− leftoverSource src bs
362− addr <- getProxyProtocolAddr src
363− http1 True addr istatus src `E.catch` \e ->
366− -- See comment below referencing
367− -- https://github.com/yesodweb/wai/issues/618
368− | Just NoKeepAliveRequest <- fromException e -> return ()
370− | Just (BadFirstLine _) <- fromException e -> return ()
372− _ <- sendErrorResponse (dummyreq addr) istatus e
376 getProxyProtocolAddr src =
314 getProxyProtocolAddr src =
@@ -413,38 +351,30 @@ serveConnection conn ii th origAddr transport settings app = do
414 decodeAscii = map (chr . fromEnum) . S.unpack
352 decodeAscii = map (chr . fromEnum) . S.unpack
416− shouldSendErrorResponse se
354+ th = threadHandle ii
417− | Just ConnectionClosedByPeer <- fromException se = False
420− sendErrorResponse req istatus e = do
356+ sendErrorResponse addr istatus e = do
421 status <- readIORef istatus
357 status <- readIORef istatus
422− if shouldSendErrorResponse e && status
358+ when status $ void $
423− then do
359+ sendResponse
424− sendResponse settings conn ii th req defaultIndexRequestHeader (return S.empty) (errorResponse e)
360+ (settingsServerName settings)
425− else return False
361+ conn ii (dummyreq addr) defaultIndexRequestHeader (return S.empty) (errorResponse e)
427 dummyreq addr = defaultRequest { remoteHost = addr }
363 dummyreq addr = defaultRequest { remoteHost = addr }
429 errorResponse e = settingsOnExceptionResponse settings e
365 errorResponse e = settingsOnExceptionResponse settings e
431− http1 firstRequest addr istatus src = do
367+ http1 addr istatus src = do
432− (req, mremainingRef, idxhdr, nextBodyFlush) <- recvRequest firstRequest settings conn ii th addr src transport
368+ (req', mremainingRef, idxhdr, nextBodyFlush) <- recvRequest settings conn ii addr src
369+ let req = req' { isSecure = isTransportSecure transport }
433 keepAlive <- processRequest istatus src req mremainingRef idxhdr nextBodyFlush
370 keepAlive <- processRequest istatus src req mremainingRef idxhdr nextBodyFlush
434 `E.catch` \e -> do
371 `E.catch` \e -> do
435− settingsOnException settings (Just req) e
372+ -- Call the user-supplied exception handlers, passing the request.
436− -- Don't throw the error again to prevent calling settingsOnException twice.
373+ sendErrorResponse addr istatus e
374+ onE settings (Just req) e
375+ -- Don't throw the error again to prevent calling onE twice.
437 return False
376 return False
438−
377+ when keepAlive $ http1 addr istatus src
439− -- When doing a keep-alive connection, the other side may just
440− -- close the connection. We don't want to treat that as an
441− -- exceptional situation, so we pass in False to http1 (which
442− -- in turn passes in False to recvRequest), indicating that
443− -- this is not the first request. If, when trying to read the
444− -- request headers, no data is available, recvRequest will
445− -- throw a NoKeepAliveRequest exception, which we catch here
446− -- and ignore. See: https://github.com/yesodweb/wai/issues/618
447− when keepAlive $ http1 False addr istatus src
449 processRequest istatus src req mremainingRef idxhdr nextBodyFlush = do
379 processRequest istatus src req mremainingRef idxhdr nextBodyFlush = do
450 -- Let the application run for as long as it wants
380 -- Let the application run for as long as it wants
@@ -454,38 +384,32 @@ serveConnection conn ii th origAddr transport settings app = do
454 -- creating the request, we need to make sure that we don't get
384 -- creating the request, we need to make sure that we don't get
455 -- an async exception before calling the ResponseSource.
385 -- an async exception before calling the ResponseSource.
456 keepAliveRef <- newIORef $ error "keepAliveRef not filled"
386 keepAliveRef <- newIORef $ error "keepAliveRef not filled"
457− r <- E.try $ app req $ \res -> do
387+ _ <- app req $ \res -> do
458 T.resume th
388 T.resume th
459 -- FIXME consider forcing evaluation of the res here to
389 -- FIXME consider forcing evaluation of the res here to
460 -- send more meaningful error messages to the user.
390 -- send more meaningful error messages to the user.
461 -- However, it may affect performance.
391 -- However, it may affect performance.
462 writeIORef istatus False
392 writeIORef istatus False
463− keepAlive <- sendResponse settings conn ii th req idxhdr (readSource src) res
393+ keepAlive <- sendResponse
394+ (settingsServerName settings)
395+ conn ii req idxhdr (readSource src) res
464 writeIORef keepAliveRef keepAlive
396 writeIORef keepAliveRef keepAlive
465 return ResponseReceived
397 return ResponseReceived
467− Right ResponseReceived -> return ()
468− Left e@(SomeException _)
469− | Just (ExceptionInsideResponseBody e') <- fromException e -> throwIO e'
471− keepAlive <- sendErrorResponse req istatus e
472− settingsOnException settings (Just req) e
473− writeIORef keepAliveRef keepAlive
475 keepAlive <- readIORef keepAliveRef
398 keepAlive <- readIORef keepAliveRef
477 -- We just send a Response and it takes a time to
400 -- We just send a Response and it takes a time to
478 -- receive a Request again. If we immediately call recv,
401 -- receive a Request again. If we immediately call recv,
479− -- it is likely to fail and cause the IO manager to do some work.
402+ -- it is likely to fail and the IO manager works.
480− -- It is very costly, so we yield to another Haskell
403+ -- It is very costly. So, we yield to another Haskell
481 -- thread hoping that the next Request will arrive
404 -- thread hoping that the next Request will arrive
482 -- when this Haskell thread will be re-scheduled.
405 -- when this Haskell thread will be re-scheduled.
483 -- This improves performance at least when
406 -- This improves performance at least when
484 -- the number of cores is small.
407 -- the number of cores is small.
485 Conc.yield
408 Conc.yield
487− if keepAlive
410+ if not keepAlive then
488− then
411+ return False
489 -- If there is an unknown or large amount of data to still be read
413 -- If there is an unknown or large amount of data to still be read
490 -- from the request body, simple drop this connection instead of
414 -- from the request body, simple drop this connection instead of
491 -- reading it all in to satisfy a keep-alive request.
415 -- reading it all in to satisfy a keep-alive request.
@@ -511,21 +435,6 @@ serveConnection conn ii th origAddr transport settings app = do
512 return False
436 return False
513 Nothing -> tryKeepAlive
437 Nothing -> tryKeepAlive
517− checkTLS = case transport of
518− TCP -> return () -- direct
519− tls -> unless (tls12orLater tls) $ goaway conn H2.InadequateSecurity "Weak TLS"
520− tls12orLater tls = tlsMajorVersion tls == 3 && tlsMinorVersion tls >= 3
522−-- connClose must not be called here since Run:fork calls it
523−goaway :: Connection -> H2.ErrorCodeId -> ByteString -> IO ()
524−goaway Connection{..} etype debugmsg = connSendAll bytestream
526− einfo = H2.encodeInfo id 0
527− frame = H2.GoAwayFrame 0 etype debugmsg
528− bytestream = H2.encodeFrame einfo frame
530flushEntireBody :: IO ByteString -> IO ()
439flushEntireBody :: IO ByteString -> IO ()
531flushEntireBody src =
440flushEntireBody src =
@@ -550,50 +459,22 @@ flushBody src =
550 | toRead' >= 0 -> loop toRead'
459 | toRead' >= 0 -> loop toRead'
551 | otherwise -> return False
460 | otherwise -> return False
553−wrappedRecv :: Connection -> T.Handle -> IORef Bool -> Int -> IO ByteString
462+connSource :: Connection -> T.Handle -> IORef Bool -> IO ByteString
554−wrappedRecv Connection { connRecv = recv } th istatus slowlorisSize = do
463+connSource Connection { connRecv = recv } th istatus = do
555 bs <- recv
464 bs <- recv
556 unless (S.null bs) $ do
465 unless (S.null bs) $ do
557 writeIORef istatus True
466 writeIORef istatus True
558− when (S.length bs >= slowlorisSize) $ T.tickle th
467+ when (S.length bs >= 2048) $ T.tickle th
559 return bs
468 return bs
561−wrappedRecvN :: T.Handle -> IORef Bool -> Int -> (BufSize -> IO ByteString) -> (BufSize -> IO ByteString)
562−wrappedRecvN th istatus slowlorisSize readN bufsize = do
564− unless (S.null bs) $ do
565− writeIORef istatus True
566− -- TODO: think about the slowloris protection in HTTP2: current code
567− -- might open a slow-loris attack vector. Rather than timing we should
568− -- consider limiting the per-client connections assuming that in HTTP2
569− -- we should allow only few connections per host (real-world
570− -- deployments with large NATs may be trickier).
571− when (S.length bs >= slowlorisSize || bufsize <= slowlorisSize) $ T.tickle th
574−-- | Set flag FileCloseOnExec flag on a socket (on Unix)
576-- Copied from: https://github.com/mzero/plush/blob/master/src/Plush/Server/Warp.hs
470-- Copied from: https://github.com/mzero/plush/blob/master/src/Plush/Server/Warp.hs
579setSocketCloseOnExec :: Socket -> IO ()
471setSocketCloseOnExec :: Socket -> IO ()
580#if WINDOWS
472#if WINDOWS
581setSocketCloseOnExec _ = return ()
473setSocketCloseOnExec _ = return ()
583−setSocketCloseOnExec socket = do
475+setSocketCloseOnExec socket =
584−#if MIN_VERSION_network(3,0,0)
476+ setFdOption (fromIntegral $ fdSocket socket) CloseOnExec True
585− fd <- fdSocket socket
587− let fd = fdSocket socket
589− F.setFileCloseOnExec $ fromIntegral fd
592−gracefulShutdown :: Settings -> Counter -> IO ()
479+gracefulShutdown :: Counter -> IO ()
593−gracefulShutdown set counter =
480+gracefulShutdown counter = waitForZero counter
594− case settingsGracefulShutdownTimeout set of
598− void (timeout (seconds * microsPerSecond) (waitForZero counter))
599− where microsPerSecond = 1000000