@@ -1,96 +1,101 @@
1+{-# LANGUAGE BangPatterns #-}
12{-# LANGUAGE CPP #-}
23{-# LANGUAGE OverloadedStrings #-}
4+{-# LANGUAGE PackageImports #-}
5+{-# LANGUAGE PatternGuards #-}
6+{-# LANGUAGE RecordWildCards #-}
37{-# LANGUAGE ScopedTypeVariables #-}
48{-# LANGUAGE TupleSections #-}
5−{-# LANGUAGE PatternGuards #-}
9+{-# LANGUAGE ViewPatterns #-}
610{-# OPTIONS_GHC -fno-warn-deprecations #-}
711
812module Network.Wai.Handler.Warp.Run where
913
10−#if __GLASGOW_HASKELL__ < 709
11−import Control.Applicative ((<$>))
12−#endif
14+import "iproute" Data.IP (toHostAddress, toHostAddress6)
1315import Control.Arrow (first)
14−import Control.Concurrent (threadDelay)
1516import qualified Control.Concurrent as Conc (yield)
1617import Control.Exception as E
17−import Control.Monad (when, unless, void)
18−import Data.ByteString (ByteString)
1918import qualified Data.ByteString as S
2019import Data.Char (chr)
21−import Data.IP (toHostAddress, toHostAddress6)
2220import Data.IORef (IORef, newIORef, readIORef, writeIORef)
2321import Data.Streaming.Network (bindPortTCP)
24−import Network (sClose, Socket)
25−import Network.Socket (accept, withSocketsDo, SockAddr(SockAddrInet, SockAddrInet6))
22+import Foreign.C.Error (Errno(..), eCONNABORTED)
23+import GHC.IO.Exception (IOException(..))
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)
28+#endif
2629import qualified Network.Socket.ByteString as Sock
2730import Network.Wai
28−import Network.Wai.HTTP2 (HTTP2Application, promoteApplication)
31+import Network.Wai.Internal (ResponseReceived (ResponseReceived))
32+import System.Environment (lookupEnv)
33+import qualified System.TimeManager as T
34+import System.Timeout (timeout)
35+
2936import Network.Wai.Handler.Warp.Buffer
3037import Network.Wai.Handler.Warp.Counter
3138import qualified Network.Wai.Handler.Warp.Date as D
3239import qualified Network.Wai.Handler.Warp.FdCache as F
3340import qualified Network.Wai.Handler.Warp.FileInfoCache as I
34−import Network.Wai.Handler.Warp.HTTP2 (http2, isHTTP2)
41+import Network.Wai.Handler.Warp.HTTP2 (http2)
42+import Network.Wai.Handler.Warp.HTTP2.Types (isHTTP2)
3543import Network.Wai.Handler.Warp.Header
44+import Network.Wai.Handler.Warp.Imports hiding (readInt)
3645import Network.Wai.Handler.Warp.ReadInt
3746import Network.Wai.Handler.Warp.Recv
3847import Network.Wai.Handler.Warp.Request
3948import Network.Wai.Handler.Warp.Response
4049import Network.Wai.Handler.Warp.SendFile
4150import Network.Wai.Handler.Warp.Settings
42−import qualified Network.Wai.Handler.Warp.Timeout as T
4351import Network.Wai.Handler.Warp.Types
44−import Network.Wai.Internal (ResponseReceived (ResponseReceived))
45−import System.Environment (getEnvironment)
46−import System.IO.Error (isFullErrorType, ioeGetErrorType)
52+
4753
4854#if WINDOWS
4955import Network.Wai.Handler.Warp.Windows
5056#else
51−import System.Posix.IO (FdOption(CloseOnExec), setFdOption)
5257import Network.Socket (fdSocket)
5358#endif
5459
5560-- | Creating 'Connection' for plain HTTP based on a given socket.
56−socketConnection :: Socket -> IO Connection
57−socketConnection s = do
61+socketConnection :: Settings -> Socket -> IO Connection
62+#if MIN_VERSION_network(3,1,1)
63+socketConnection set s = do
64+#else
65+socketConnection _ s = do
66+#endif
5867 bufferPool <- newBufferPool
5968 writeBuf <- allocateBuffer bufferSize
6069 let sendall = Sock.sendAll s
70+ isH2 <- newIORef False -- HTTP/1.x
6171 return Connection {
6272 connSendMany = Sock.sendMany s
6373 , connSendAll = sendall
6474 , connSendFile = sendFile s writeBuf bufferSize sendall
65− , connClose = sClose s >> freeBuffer writeBuf
75+#if MIN_VERSION_network(3,1,1)
76+ , connClose = do
77+ h2 <- readIORef isH2
78+ let tm = if h2 then settingsGracefulCloseTimeout2 set
79+ else settingsGracefulCloseTimeout1 set
80+ if tm == 0 then
81+ close s
82+ else
83+ gracefulClose s tm `E.catch` \(E.SomeException _) -> return ()
84+#else
85+ , connClose = close s
86+#endif
87+ , connFree = freeBuffer writeBuf
6688 , connRecv = receive s bufferPool
6789 , connRecvBuf = receiveBuf s
6890 , connWriteBuffer = writeBuf
6991 , connBufferSize = bufferSize
92+ , connHTTP2 = isH2
7093 }
7194
72−#if __GLASGOW_HASKELL__ < 702
73−allowInterrupt :: IO ()
74−allowInterrupt = unblock $ return ()
75−#endif
76−
77−-- Composition over two arguments at once; used for runHTTP2\*.
78−(.:) :: (c -> d) -> (a -> b -> c) -> a -> b -> d
79−f .: g = curry $ f . uncurry g
80−
8195-- | Run an 'Application' on the given port.
8296-- This calls 'runSettings' with 'defaultSettings'.
8397run :: Port -> Application -> IO ()
84−run port = runServe port . serveDefault
85−
86−-- | Serve an 'HTTP2Application' and an 'Application' together on the given
87−-- port.
88−runHTTP2 :: Port -> HTTP2Application -> Application -> IO ()
89−runHTTP2 port = runServe port .: serveHTTP2
90−
91−-- | The generalized form of 'run'.
92−runServe :: Port -> ServeConnection -> IO ()
93−runServe p = runServeSettings defaultSettings { settingsPort = p }
98+run p = runSettings defaultSettings { settingsPort = p }
9499
95100-- | Run an 'Application' on the port present in the @PORT@
96101-- environment variable. Uses the 'Port' given when the variable is unset.
@@ -98,44 +103,28 @@ runServe p = runServeSettings defaultSettings { settingsPort = p }
98103--
99104-- Since 3.0.9
100105runEnv :: Port -> Application -> IO ()
101−runEnv port = runServeEnv port . serveDefault
102−
103−-- | The HTTP\/2-aware form of 'runEnv'.
104−runHTTP2Env :: Port -> HTTP2Application -> Application -> IO ()
105−runHTTP2Env port = runServeEnv port .: serveHTTP2
106+runEnv p app = do
107+ mp <- lookupEnv "PORT"
106108
107−-- | The generalized form of 'runEnv'.
108−runServeEnv :: Port -> ServeConnection -> IO ()
109−runServeEnv p serveConn = do
110− mp <- lookup "PORT" <$> getEnvironment
111−
112− maybe (runServe p serveConn) runReadPort mp
109+ maybe (run p app) runReadPort mp
113110
114111 where
115112 runReadPort :: String -> IO ()
116113 runReadPort sp = case reads sp of
117− ((p', _):_) -> runServe p' serveConn
114+ ((p', _):_) -> run p' app
118115 _ -> fail $ "Invalid value in $PORT: " ++ sp
119116
120117-- | Run an 'Application' with the given 'Settings'.
121118-- This opens a listen socket on the port defined in 'Settings' and
122119-- calls 'runSettingsSocket'.
123120runSettings :: Settings -> Application -> IO ()
124−runSettings set = runServeSettings set . serveDefault
125−
126−-- | The HTTP\/2-aware form of 'runSettings'.
127−runHTTP2Settings :: Settings -> HTTP2Application -> Application -> IO ()
128−runHTTP2Settings set = runServeSettings set .: serveHTTP2
129−
130−-- | The generalized form of 'runSettings'.
131−runServeSettings :: Settings -> ServeConnection -> IO ()
132−runServeSettings set serveConn = withSocketsDo $
121+runSettings set app = withSocketsDo $
133122 bracket
134123 (bindPortTCP (settingsPort set) (settingsHost set))
135− sClose
124+ close
136125 (\socket -> do
137126 setSocketCloseOnExec socket
138− runServeSettingsSocket set socket serveConn)
127+ runSettingsSocket set socket app)
139128
140129-- | This installs a shutdown handler for the given socket and
141130-- calls 'runSettingsConnection' with the default connection setup action
@@ -149,22 +138,9 @@ runServeSettings set serveConn = withSocketsDo $
149138-- Note that the 'settingsPort' will still be passed to 'Application's via the
150139-- 'serverPort' record.
151140runSettingsSocket :: Settings -> Socket -> Application -> IO ()
152−runSettingsSocket set socket = runServeSettingsSocket set socket . serveDefault
153−
154−-- | The HTTP\/2-aware form of 'runSettingsSocket'.
155−runHTTP2SettingsSocket :: Settings
156− -> Socket
157− -> HTTP2Application
158− -> Application
159− -> IO ()
160−runHTTP2SettingsSocket set socket =
161− runServeSettingsSocket set socket .: serveHTTP2
162−
163−-- | The generalized form of 'runSettingsSocket'.
164−runServeSettingsSocket :: Settings -> Socket -> ServeConnection -> IO ()
165−runServeSettingsSocket set socket serveConn = do
141+runSettingsSocket set socket app = do
166142 settingsInstallShutdownHandler set closeListenSocket
167− runServeSettingsConnection set getConn serveConn
143+ runSettingsConnection set getConn app
168144 where
169145 getConn = do
170146#if WINDOWS
@@ -173,10 +149,12 @@ runServeSettingsSocket set socket serveConn = do
173149 (s, sa) <- accept socket
174150#endif
175151 setSocketCloseOnExec s
176− conn <- socketConnection s
152+ -- NoDelay causes an error for AF_UNIX.
153+ setSocketOption s NoDelay 1 `E.catch` \(E.SomeException _) -> return ()
154+ conn <- socketConnection set s
177155 return (conn, sa)
178156
179− closeListenSocket = sClose socket
157+ closeListenSocket = close socket
180158
181159-- | The connection setup action would be expensive. A good example
182160-- is initialization of TLS.
@@ -188,16 +166,7 @@ runServeSettingsSocket set socket serveConn = do
188166--
189167-- Since 1.3.5
190168runSettingsConnection :: Settings -> IO (Connection, SockAddr) -> Application -> IO ()
191−runSettingsConnection set getConn =
192− runServeSettingsConnection set getConn . serveDefault
193−
194−-- | The generalized form of 'runSettingsConnection'.
195−runServeSettingsConnection :: Settings
196− -> IO (Connection, SockAddr)
197− -> ServeConnection
198− -> IO ()
199−runServeSettingsConnection set getConn serveConn =
200− runServeSettingsConnectionMaker set getConnMaker serveConn
169+runSettingsConnection set getConn app = runSettingsConnectionMaker set getConnMaker app
201170 where
202171 getConnMaker = do
203172 (conn, sa) <- getConn
@@ -206,16 +175,8 @@ runServeSettingsConnection set getConn serveConn =
206175-- | This modifies the connection maker so that it returns 'TCP' for 'Transport'
207176-- (i.e. plain HTTP) then calls 'runSettingsConnectionMakerSecure'.
208177runSettingsConnectionMaker :: Settings -> IO (IO Connection, SockAddr) -> Application -> IO ()
209−runSettingsConnectionMaker set getConnMaker =
210− runServeSettingsConnectionMaker set getConnMaker . serveDefault
211−
212−-- | The generalized form of 'runSettingsConnectionMaker'.
213−runServeSettingsConnectionMaker :: Settings
214− -> IO (IO Connection, SockAddr)
215− -> ServeConnection
216− -> IO ()
217−runServeSettingsConnectionMaker x y =
218− runServeSettingsConnectionMakerSecure x (toTCP <$> y)
178+runSettingsConnectionMaker x y =
179+ runSettingsConnectionMakerSecure x (toTCP <$> y)
219180 where
220181 toTCP = first ((, TCP) <$>)
221182
@@ -228,33 +189,26 @@ runServeSettingsConnectionMaker x y =
228189--
229190-- Since 2.1.4
230191runSettingsConnectionMakerSecure :: Settings -> IO (IO (Connection, Transport), SockAddr) -> Application -> IO ()
231−runSettingsConnectionMakerSecure set getConnMaker =
232− runServeSettingsConnectionMakerSecure set getConnMaker . serveDefault
233−
234−-- | The generalized form of 'runSettingsConnectionMakerSecure'.
235−runServeSettingsConnectionMakerSecure :: Settings
236− -> IO (IO (Connection, Transport), SockAddr)
237− -> ServeConnection
238− -> IO ()
239−runServeSettingsConnectionMakerSecure set getConnMaker serveConn = do
192+runSettingsConnectionMakerSecure set getConnMaker app = do
240193 settingsBeforeMainLoop set
241194 counter <- newCounter
242− withII $ acceptConnection set getConnMaker serveConn counter
195+ withII $ acceptConnection set getConnMaker app counter
243196 where
244197 withII action =
198+ withTimeoutManager $ \tm ->
245199 D.withDateCache $ \dc ->
246− F.withFdCache fdCacheDurationInSeconds $ \fc ->
247− I.withFileInfoCache fdFileInfoDurationInSeconds $ \get ->
248− withTimeoutManager $ \tm -> do
249− let ii0 = InternalInfo undefined tm fc get dc -- fixme: undefined
250− action ii0
251−
252− fdCacheDurationInSeconds = settingsFdCacheDuration set * 1000000
253− fdFileInfoDurationInSeconds = settingsFileInfoCacheDuration set * 1000000
200+ F.withFdCache fdCacheDurationInSeconds $ \fdc ->
201+ I.withFileInfoCache fdFileInfoDurationInSeconds $ \fic -> do
202+ let ii = InternalInfo tm dc fdc fic
203+ action ii
204+
205+ !fdCacheDurationInSeconds = settingsFdCacheDuration set * 1000000
206+ !fdFileInfoDurationInSeconds = settingsFileInfoCacheDuration set * 1000000
207+ !timeoutInSeconds = settingsTimeout set * 1000000
254208 withTimeoutManager f = case settingsManager set of
255209 Just tm -> f tm
256210 Nothing -> bracket
257− (T.initialize $ settingsTimeout set * 1000000)
211+ (T.initialize timeoutInSeconds)
258212 T.stopManager
259213 f
260214
@@ -273,16 +227,21 @@ runServeSettingsConnectionMakerSecure set getConnMaker serveConn = do
273227-- Our approach is explained in the comments below.
274228acceptConnection :: Settings
275229 -> IO (IO (Connection, Transport), SockAddr)
276− -> ServeConnection
230+ -> Application
277231 -> Counter
278232 -> InternalInfo
279233 -> IO ()
280−acceptConnection set getConnMaker serveConn counter ii0 = do
234+acceptConnection set getConnMaker app counter ii = do
281235 -- First mask all exceptions in acceptLoop. This is necessary to
282236 -- ensure that no async exception is throw between the call to
283237 -- acceptNewConnection and the registering of connClose.
238+ --
239+ -- acceptLoop can be broken by closing the listing socket.
284240 void $ mask_ acceptLoop
285− gracefulShutdown counter
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
286245 where
287246 acceptLoop = do
288247 -- Allow async exceptions before receiving the next connection maker.
@@ -299,88 +258,78 @@ acceptConnection set getConnMaker serveConn counter ii0 = do
299258 case mx of
300259 Nothing -> return ()
301260 Just (mkConn, addr) -> do
302− fork set mkConn addr serveConn counter ii0
261+ fork set mkConn addr app counter ii
303262 acceptLoop
304263
305264 acceptNewConnection = do
306265 ex <- try getConnMaker
307266 case ex of
308267 Right x -> return $ Just x
309− Left e -> do
310− settingsOnException set Nothing $ toException e
311− if isFullErrorType (ioeGetErrorType e) then do
312− -- "resource exhausted (Too many open files)" may
313− -- happen by accept(). Wait a second hoping that
314− -- resource will be available.
315− threadDelay 1000000
316− acceptNewConnection
317− else
318− -- Assuming the listen socket is closed.
319− return Nothing
268+ Left e -> do
269+ let eConnAborted = getErrno eCONNABORTED
270+ getErrno (Errno cInt) = cInt
271+ if ioe_errno e == Just eConnAborted
272+ then acceptNewConnection
273+ else do
274+ settingsOnException set Nothing $ toException e
275+ return Nothing
320276
321277-- Fork a new worker thread for this connection maker, and ask for a
322278-- function to unmask (i.e., allow async exceptions to be thrown).
323279fork :: Settings
324280 -> IO (Connection, Transport)
325281 -> SockAddr
326− -> ServeConnection
282+ -> Application
327283 -> Counter
328284 -> InternalInfo
329285 -> IO ()
330−fork set mkConn addr serveConn counter ii0 = settingsFork set $ \ unmask ->
331− -- Run the connection maker to get a new connection, and ensure
332− -- that the connection is closed. If the mkConn call throws an
333− -- exception, we will leak the connection. If the mkConn call is
334− -- vulnerable to attacks (e.g., Slowloris), we do nothing to
335− -- protect the server. It is therefore vital that mkConn is well
336− -- vetted.
337− --
338− -- We grab the connection before registering timeouts since the
339− -- timeouts will be useless during connection creation, due to the
340− -- fact that async exceptions are still masked.
341− bracket mkConn closeConn $ \(conn, transport) ->
286+fork set mkConn addr app counter ii = settingsFork set $ \unmask ->
287+ -- Call the user-supplied on exception code if any
288+ -- exceptions are thrown.
289+ handle (settingsOnException set Nothing) $
290+ -- Run the connection maker to get a new connection, and ensure
291+ -- that the connection is closed. If the mkConn call throws an
292+ -- exception, we will leak the connection. If the mkConn call is
293+ -- vulnerable to attacks (e.g., Slowloris), we do nothing to
294+ -- protect the server. It is therefore vital that mkConn is well
295+ -- vetted.
296+ --
297+ -- We grab the connection before registering timeouts since the
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)
301+ where
302+ cleanUp (conn, _) = connClose conn `finally` connFree conn
342303
343304 -- We need to register a timeout handler for this thread, and
344305 -- cancel that handler as soon as we exit.
345− bracket (T.registerKillThread (timeoutManager ii0)) T.cancel $ \th ->
346−
347− let ii = ii0 { threadHandle = th }
348− -- We now have fully registered a connection close handler
349− -- in the case of all exceptions, so it is safe to one
350− -- again allow async exceptions.
351− in unmask .
352− -- Call the user-supplied on exception code if any
353− -- exceptions are thrown.
354− handle (settingsOnException set Nothing) .
355−
356− -- Call the user-supplied code for connection open and close events
357− bracket (onOpen addr) (onClose addr) $ \goingon ->
358−
359− -- Actually serve this connection.
360− -- bracket with closeConn above ensures the connection is closed.
361− when goingon $ serveConn conn ii addr transport set
362− where
363− closeConn (conn, _transport) = connClose conn
306+ serve unmask (conn, transport) = bracket register cancel $ \th -> do
307+ -- We now have fully registered a connection close handler in
308+ -- the case of all exceptions, so it is safe to once again
309+ -- allow async exceptions.
310+ unmask .
311+ -- Call the user-supplied code for connection open and
312+ -- close events
313+ bracket (onOpen addr) (onClose addr) $ \goingon ->
314+ -- Actually serve this connection. bracket with closeConn
315+ -- above ensures the connection is closed.
316+ when goingon $ serveConnection conn ii th addr transport set app
317+ where
318+ register = T.registerKillThread (timeoutManager ii) (connClose conn)
319+ cancel = T.cancel
364320
365321 onOpen adr = increase counter >> settingsOnOpen set adr
366322 onClose adr _ = decrease counter >> settingsOnClose set adr
367323
368−-- The type of a function to serve a fully-prepared connection.
369−type ServeConnection = Connection
370− -> InternalInfo
371− -> SockAddr
372− -> Transport
373− -> Settings
374− -> IO ()
375−
376−-- Serve an HTTP\/2-unaware Application to a connection over any HTTP version.
377−serveDefault :: Application -> ServeConnection
378−serveDefault app = serveHTTP2 (promoteApplication app) app
379−
380−-- Serve an HTTP\/2-aware application over HTTP\/2 or a backup 'Application'
381−-- over HTTP\/1.1 or HTTP\/1.
382−serveHTTP2 :: HTTP2Application -> Application -> ServeConnection
383−serveHTTP2 app2 app conn ii origAddr transport settings = do
324+serveConnection :: Connection
325+ -> InternalInfo
326+ -> T.Handle
327+ -> SockAddr
328+ -> Transport
329+ -> Settings
330+ -> Application
331+ -> IO ()
332+serveConnection conn ii th origAddr transport settings app = do
384333 -- fixme: Upgrading to HTTP/2 should be supported.
385334 (h2,bs) <- if isHTTP2 transport then
386335 return (True, "")
@@ -390,19 +339,39 @@ serveHTTP2 app2 app conn ii origAddr transport settings = do
390339 return (True, bs0)
391340 else
392341 return (False, bs0)
342+ istatus <- newIORef False
393343 if settingsHTTP2Enabled settings && h2 then do
394− recvN <- makeReceiveN bs (connRecv conn) (connRecvBuf conn)
344+ rawRecvN <- makeReceiveN bs (connRecv conn) (connRecvBuf conn)
345+ -- This thread becomes the sender in http2 library.
346+ -- In the case of event source, one request comes and one
347+ -- worker gets busy. But it is likely that the receiver does
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
395354 -- fixme: origAddr
396− http2 conn ii origAddr transport settings recvN app2
355+ checkTLS
356+ setConnHTTP2 conn True
357+ http2 conn transport ii origAddr settings recvN sendBS app
397358 else do
398− istatus <- newIORef False
399359 src <- mkSource (wrappedRecv conn th istatus (settingsSlowlorisSize settings))
400360 writeIORef istatus True
401361 leftoverSource src bs
402362 addr <- getProxyProtocolAddr src
403− http1 addr istatus src `E.catch` \e -> do
404− sendErrorResponse addr istatus e
405− throwIO (e :: SomeException)
363+ http1 True addr istatus src `E.catch` \e ->
364+ case () of
365+ ()
366+ -- See comment below referencing
367+ -- https://github.com/yesodweb/wai/issues/618
368+ | Just NoKeepAliveRequest <- fromException e -> return ()
369+ -- No valid request
370+ | Just (BadFirstLine _) <- fromException e -> return ()
371+ | otherwise -> do
372+ _ <- sendErrorResponse (dummyreq addr) istatus e
373+ throwIO e
374+
406375 where
407376 getProxyProtocolAddr src =
408377 case settingsProxyProtocol settings of
@@ -444,32 +413,38 @@ serveHTTP2 app2 app conn ii origAddr transport settings = do
444413
445414 decodeAscii = map (chr . fromEnum) . S.unpack
446415
447− th = threadHandle ii
448−
449416 shouldSendErrorResponse se
450417 | Just ConnectionClosedByPeer <- fromException se = False
451418 | otherwise = True
452419
453− sendErrorResponse addr istatus e = do
420+ sendErrorResponse req istatus e = do
454421 status <- readIORef istatus
455− when (shouldSendErrorResponse e && status) $ void $
456− sendResponse settings conn ii (dummyreq addr) defaultIndexRequestHeader (return S.empty) (errorResponse e)
422+ if shouldSendErrorResponse e && status
423+ then do
424+ sendResponse settings conn ii th req defaultIndexRequestHeader (return S.empty) (errorResponse e)
425+ else return False
457426
458427 dummyreq addr = defaultRequest { remoteHost = addr }
459428
460429 errorResponse e = settingsOnExceptionResponse settings e
461430
462− http1 addr istatus src = do
463− (req', mremainingRef, idxhdr, nextBodyFlush) <- recvRequest settings conn ii addr src
464− let req = req' { isSecure = isTransportSecure transport }
431+ http1 firstRequest addr istatus src = do
432+ (req, mremainingRef, idxhdr, nextBodyFlush) <- recvRequest firstRequest settings conn ii th addr src transport
465433 keepAlive <- processRequest istatus src req mremainingRef idxhdr nextBodyFlush
466434 `E.catch` \e -> do
467− -- Call the user-supplied exception handlers, passing the request.
468− sendErrorResponse addr istatus e
469435 settingsOnException settings (Just req) e
470436 -- Don't throw the error again to prevent calling settingsOnException twice.
471437 return False
472− when keepAlive $ http1 addr istatus src
438+
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
473448
474449 processRequest istatus src req mremainingRef idxhdr nextBodyFlush = do
475450 -- Let the application run for as long as it wants
@@ -479,30 +454,38 @@ serveHTTP2 app2 app conn ii origAddr transport settings = do
479454 -- creating the request, we need to make sure that we don't get
480455 -- an async exception before calling the ResponseSource.
481456 keepAliveRef <- newIORef $ error "keepAliveRef not filled"
482− _ <- app req $ \res -> do
457+ r <- E.try $ app req $ \res -> do
483458 T.resume th
484459 -- FIXME consider forcing evaluation of the res here to
485460 -- send more meaningful error messages to the user.
486461 -- However, it may affect performance.
487462 writeIORef istatus False
488− keepAlive <- sendResponse settings conn ii req idxhdr (readSource src) res
463+ keepAlive <- sendResponse settings conn ii th req idxhdr (readSource src) res
489464 writeIORef keepAliveRef keepAlive
490465 return ResponseReceived
466+ case r of
467+ Right ResponseReceived -> return ()
468+ Left e@(SomeException _)
469+ | Just (ExceptionInsideResponseBody e') <- fromException e -> throwIO e'
470+ | otherwise -> do
471+ keepAlive <- sendErrorResponse req istatus e
472+ settingsOnException settings (Just req) e
473+ writeIORef keepAliveRef keepAlive
474+
491475 keepAlive <- readIORef keepAliveRef
492476
493477 -- We just send a Response and it takes a time to
494478 -- receive a Request again. If we immediately call recv,
495− -- it is likely to fail and the IO manager works.
496− -- It is very costly. So, we yield to another Haskell
479+ -- it is likely to fail and cause the IO manager to do some work.
480+ -- It is very costly, so we yield to another Haskell
497481 -- thread hoping that the next Request will arrive
498482 -- when this Haskell thread will be re-scheduled.
499483 -- This improves performance at least when
500484 -- the number of cores is small.
501485 Conc.yield
502486
503− if not keepAlive then
504− return False
505− else
487+ if keepAlive
488+ then
506489 -- If there is an unknown or large amount of data to still be read
507490 -- from the request body, simple drop this connection instead of
508491 -- reading it all in to satisfy a keep-alive request.
@@ -528,6 +511,21 @@ serveHTTP2 app2 app conn ii origAddr transport settings = do
528511 else
529512 return False
530513 Nothing -> tryKeepAlive
514+ else
515+ return False
516+
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
521+
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
525+ where
526+ einfo = H2.encodeInfo id 0
527+ frame = H2.GoAwayFrame 0 etype debugmsg
528+ bytestream = H2.encodeFrame einfo frame
531529
532530flushEntireBody :: IO ByteString -> IO ()
533531flushEntireBody src =
@@ -560,14 +558,42 @@ wrappedRecv Connection { connRecv = recv } th istatus slowlorisSize = do
560558 when (S.length bs >= slowlorisSize) $ T.tickle th
561559 return bs
562560
561+wrappedRecvN :: T.Handle -> IORef Bool -> Int -> (BufSize -> IO ByteString) -> (BufSize -> IO ByteString)
562+wrappedRecvN th istatus slowlorisSize readN bufsize = do
563+ bs <- readN bufsize
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
572+ return bs
573+
574+-- | Set flag FileCloseOnExec flag on a socket (on Unix)
575+--
563576-- Copied from: https://github.com/mzero/plush/blob/master/src/Plush/Server/Warp.hs
577+--
578+-- @since 3.2.17
564579setSocketCloseOnExec :: Socket -> IO ()
565580#if WINDOWS
566581setSocketCloseOnExec _ = return ()
567582#else
568−setSocketCloseOnExec socket =
569− setFdOption (fromIntegral $ fdSocket socket) CloseOnExec True
583+setSocketCloseOnExec socket = do
584+#if MIN_VERSION_network(3,0,0)
585+ fd <- fdSocket socket
586+#else
587+ let fd = fdSocket socket
588+#endif
589+ F.setFileCloseOnExec $ fromIntegral fd
570590#endif
571591
572−gracefulShutdown :: Counter -> IO ()
573−gracefulShutdown counter = waitForZero counter
592+gracefulShutdown :: Settings -> Counter -> IO ()
593+gracefulShutdown set counter =
594+ case settingsGracefulShutdownTimeout set of
595+ Nothing ->
596+ waitForZero counter
597+ (Just seconds) ->
598+ void (timeout (seconds * microsPerSecond) (waitForZero counter))
599+ where microsPerSecond = 1000000