@@ -1,55 +1,48 @@
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 #-}
5+{-# LANGUAGE PatternGuards #-}
10{-# OPTIONS_GHC -fno-warn-deprecations #-}
6{-# OPTIONS_GHC -fno-warn-deprecations #-}
12module Network.Wai.Handler.Warp.Run where
8module Network.Wai.Handler.Warp.Run where
14−import "iproute" Data.IP (toHostAddress, toHostAddress6)
10+#if __GLASGOW_HASKELL__ < 709
11+import Control.Applicative ((<$>))
15import Control.Arrow (first)
13import Control.Arrow (first)
14+import Control.Concurrent (threadDelay)
16import qualified Control.Concurrent as Conc (yield)
15import qualified Control.Concurrent as Conc (yield)
17import Control.Exception as E
16import Control.Exception as E
17+import Control.Monad (when, unless, void)
18+import Data.ByteString (ByteString)
18import qualified Data.ByteString as S
19import qualified Data.ByteString as S
19import Data.Char (chr)
20import Data.Char (chr)
21+import Data.IP (toHostAddress, toHostAddress6)
20import Data.IORef (IORef, newIORef, readIORef, writeIORef)
22import Data.IORef (IORef, newIORef, readIORef, writeIORef)
21import Data.Streaming.Network (bindPortTCP)
23import Data.Streaming.Network (bindPortTCP)
22−import Foreign.C.Error (Errno(..), eCONNABORTED)
24+import Network (sClose, Socket)
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(..))
25+import Network.Socket (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
26import qualified Network.Socket.ByteString as Sock
30import Network.Wai
27import 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
28import Network.Wai.Handler.Warp.Buffer
37import Network.Wai.Handler.Warp.Counter
29import Network.Wai.Handler.Warp.Counter
38import qualified Network.Wai.Handler.Warp.Date as D
30import qualified Network.Wai.Handler.Warp.Date as D
39import qualified Network.Wai.Handler.Warp.FdCache as F
31import qualified Network.Wai.Handler.Warp.FdCache as F
40import qualified Network.Wai.Handler.Warp.FileInfoCache as I
32import qualified Network.Wai.Handler.Warp.FileInfoCache as I
41−import Network.Wai.Handler.Warp.HTTP2 (http2)
33+import Network.Wai.Handler.Warp.HTTP2 (http2, isHTTP2)
42−import Network.Wai.Handler.Warp.HTTP2.Types (isHTTP2)
43import Network.Wai.Handler.Warp.Header
34import Network.Wai.Handler.Warp.Header
44−import Network.Wai.Handler.Warp.Imports hiding (readInt)
45import Network.Wai.Handler.Warp.ReadInt
35import Network.Wai.Handler.Warp.ReadInt
46import Network.Wai.Handler.Warp.Recv
36import Network.Wai.Handler.Warp.Recv
47import Network.Wai.Handler.Warp.Request
37import Network.Wai.Handler.Warp.Request
48import Network.Wai.Handler.Warp.Response
38import Network.Wai.Handler.Warp.Response
49import Network.Wai.Handler.Warp.SendFile
39import Network.Wai.Handler.Warp.SendFile
50import Network.Wai.Handler.Warp.Settings
40import Network.Wai.Handler.Warp.Settings
41+import qualified Network.Wai.Handler.Warp.Timeout as T
51import Network.Wai.Handler.Warp.Types
42import Network.Wai.Handler.Warp.Types
52−
43+import Network.Wai.Internal (ResponseReceived (ResponseReceived))
44+import System.Environment (getEnvironment)
45+import System.IO.Error (isFullErrorType, ioeGetErrorType)
54#if WINDOWS
47#if WINDOWS
55import Network.Wai.Handler.Warp.Windows
48import Network.Wai.Handler.Warp.Windows
@@ -58,40 +51,27 @@ import Network.Socket (fdSocket)
60-- | Creating 'Connection' for plain HTTP based on a given socket.
53-- | Creating 'Connection' for plain HTTP based on a given socket.
61−socketConnection :: Settings -> Socket -> IO Connection
54+socketConnection :: Socket -> IO Connection
62−#if MIN_VERSION_network(3,1,1)
63−socketConnection set s = do
65−socketConnection _ s = do
55+socketConnection s = do
67 bufferPool <- newBufferPool
56 bufferPool <- newBufferPool
68 writeBuf <- allocateBuffer bufferSize
57 writeBuf <- allocateBuffer bufferSize
69 let sendall = Sock.sendAll s
58 let sendall = Sock.sendAll s
70− isH2 <- newIORef False -- HTTP/1.x
71 return Connection {
59 return Connection {
72 connSendMany = Sock.sendMany s
60 connSendMany = Sock.sendMany s
73 , connSendAll = sendall
61 , connSendAll = sendall
74 , connSendFile = sendFile s writeBuf bufferSize sendall
62 , connSendFile = sendFile s writeBuf bufferSize sendall
75−#if MIN_VERSION_network(3,1,1)
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
63+ , connClose = sClose s >> freeBuffer writeBuf
88 , connRecv = receive s bufferPool
64 , connRecv = receive s bufferPool
89 , connRecvBuf = receiveBuf s
65 , connRecvBuf = receiveBuf s
90 , connWriteBuffer = writeBuf
66 , connWriteBuffer = writeBuf
91 , connBufferSize = bufferSize
67 , connBufferSize = bufferSize
70+#if __GLASGOW_HASKELL__ < 702
71+allowInterrupt :: IO ()
72+allowInterrupt = unblock $ return ()
95-- | Run an 'Application' on the given port.
75-- | Run an 'Application' on the given port.
96-- This calls 'runSettings' with 'defaultSettings'.
76-- This calls 'runSettings' with 'defaultSettings'.
97run :: Port -> Application -> IO ()
77run :: Port -> Application -> IO ()
@@ -104,7 +84,7 @@ run p = runSettings defaultSettings { settingsPort = p }
104-- Since 3.0.9
84-- Since 3.0.9
105runEnv :: Port -> Application -> IO ()
85runEnv :: Port -> Application -> IO ()
106runEnv p app = do
86runEnv p app = do
107− mp <- lookupEnv "PORT"
87+ mp <- lookup "PORT" <$> getEnvironment
109 maybe (run p app) runReadPort mp
89 maybe (run p app) runReadPort mp
@@ -121,7 +101,7 @@ runSettings :: Settings -> Application -> IO ()
121runSettings set app = withSocketsDo $
101runSettings set app = withSocketsDo $
123 (bindPortTCP (settingsPort set) (settingsHost set))
103 (bindPortTCP (settingsPort set) (settingsHost set))
125 (\socket -> do
105 (\socket -> do
126 setSocketCloseOnExec socket
106 setSocketCloseOnExec socket
127 runSettingsSocket set socket app)
107 runSettingsSocket set socket app)
@@ -149,12 +129,11 @@ runSettingsSocket set socket app = do
149 (s, sa) <- accept socket
129 (s, sa) <- accept socket
151 setSocketCloseOnExec s
131 setSocketCloseOnExec s
152− -- NoDelay causes an error for AF_UNIX.
153− setSocketOption s NoDelay 1 `E.catch` \(E.SomeException _) -> return ()
132+ setSocketOption s NoDelay 1
154− conn <- socketConnection set s
133+ conn <- socketConnection s
155 return (conn, sa)
134 return (conn, sa)
157− closeListenSocket = close socket
136+ closeListenSocket = sClose socket
159-- | The connection setup action would be expensive. A good example
138-- | The connection setup action would be expensive. A good example
160-- is initialization of TLS.
139-- is initialization of TLS.
@@ -192,23 +171,22 @@ runSettingsConnectionMakerSecure :: Settings -> IO (IO (Connection, Transport),
192runSettingsConnectionMakerSecure set getConnMaker app = do
171runSettingsConnectionMakerSecure set getConnMaker app = do
193 settingsBeforeMainLoop set
172 settingsBeforeMainLoop set
194 counter <- newCounter
173 counter <- newCounter
195− withII $ acceptConnection set getConnMaker app counter
174+ withII0 $ acceptConnection set getConnMaker app counter
197− withII action =
176+ withII0 action =
198 withTimeoutManager $ \tm ->
177 withTimeoutManager $ \tm ->
199 D.withDateCache $ \dc ->
178 D.withDateCache $ \dc ->
200 F.withFdCache fdCacheDurationInSeconds $ \fdc ->
179 F.withFdCache fdCacheDurationInSeconds $ \fdc ->
201 I.withFileInfoCache fdFileInfoDurationInSeconds $ \fic -> do
180 I.withFileInfoCache fdFileInfoDurationInSeconds $ \fic -> do
202− let ii = InternalInfo tm dc fdc fic
181+ let ii0 = InternalInfo0 tm dc fdc fic
203− action ii
182+ action ii0
205− !fdCacheDurationInSeconds = settingsFdCacheDuration set * 1000000
184+ fdCacheDurationInSeconds = settingsFdCacheDuration set * 1000000
206− !fdFileInfoDurationInSeconds = settingsFileInfoCacheDuration set * 1000000
185+ fdFileInfoDurationInSeconds = settingsFileInfoCacheDuration set * 1000000
207− !timeoutInSeconds = settingsTimeout set * 1000000
208 withTimeoutManager f = case settingsManager set of
186 withTimeoutManager f = case settingsManager set of
209 Just tm -> f tm
187 Just tm -> f tm
210 Nothing -> bracket
188 Nothing -> bracket
211− (T.initialize timeoutInSeconds)
189+ (T.initialize $ settingsTimeout set * 1000000)
212 T.stopManager
190 T.stopManager
@@ -229,19 +207,14 @@ acceptConnection :: Settings
229 -> IO (IO (Connection, Transport), SockAddr)
207 -> IO (IO (Connection, Transport), SockAddr)
230 -> Application
208 -> Application
231 -> Counter
209 -> Counter
232− -> InternalInfo
210+ -> InternalInfo0
234−acceptConnection set getConnMaker app counter ii = do
212+acceptConnection set getConnMaker app counter ii0 = do
235 -- First mask all exceptions in acceptLoop. This is necessary to
213 -- First mask all exceptions in acceptLoop. This is necessary to
236 -- ensure that no async exception is throw between the call to
214 -- ensure that no async exception is throw between the call to
237 -- acceptNewConnection and the registering of connClose.
215 -- acceptNewConnection and the registering of connClose.
239− -- acceptLoop can be broken by closing the listing socket.
240 void $ mask_ acceptLoop
216 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
217+ gracefulShutdown counter
246 acceptLoop = do
219 acceptLoop = do
247 -- Allow async exceptions before receiving the next connection maker.
220 -- Allow async exceptions before receiving the next connection maker.
@@ -258,21 +231,24 @@ acceptConnection set getConnMaker app counter ii = do
258 case mx of
231 case mx of
259 Nothing -> return ()
232 Nothing -> return ()
260 Just (mkConn, addr) -> do
233 Just (mkConn, addr) -> do
261− fork set mkConn addr app counter ii
234+ fork set mkConn addr app counter ii0
262 acceptLoop
235 acceptLoop
264 acceptNewConnection = do
237 acceptNewConnection = do
265 ex <- try getConnMaker
238 ex <- try getConnMaker
266 case ex of
239 case ex of
267 Right x -> return $ Just x
240 Right x -> return $ Just x
268− Left e -> do
241+ Left e -> do
269− let eConnAborted = getErrno eCONNABORTED
242+ settingsOnException set Nothing $ toException e
270− getErrno (Errno cInt) = cInt
243+ if isFullErrorType (ioeGetErrorType e) then do
271− if ioe_errno e == Just eConnAborted
244+ -- "resource exhausted (Too many open files)" may
245+ -- happen by accept(). Wait a second hoping that
246+ -- resource will be available.
272− then acceptNewConnection
248+ acceptNewConnection
274− settingsOnException set Nothing $ toException e
250+ -- Assuming the listen socket is closed.
275− return Nothing
251+ return Nothing
277-- Fork a new worker thread for this connection maker, and ask for a
253-- 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).
254-- function to unmask (i.e., allow async exceptions to be thrown).
@@ -281,55 +257,54 @@ fork :: Settings
281 -> SockAddr
257 -> SockAddr
282 -> Application
258 -> Application
283 -> Counter
259 -> Counter
284− -> InternalInfo
260+ -> InternalInfo0
286−fork set mkConn addr app counter ii = settingsFork set $ \unmask ->
262+fork set mkConn addr app counter ii0 = 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
263+ -- Run the connection maker to get a new connection, and ensure
291− -- that the connection is closed. If the mkConn call throws an
264+ -- that the connection is closed. If the mkConn call throws an
292− -- exception, we will leak the connection. If the mkConn call is
265+ -- exception, we will leak the connection. If the mkConn call is
293− -- vulnerable to attacks (e.g., Slowloris), we do nothing to
266+ -- vulnerable to attacks (e.g., Slowloris), we do nothing to
294− -- protect the server. It is therefore vital that mkConn is well
267+ -- protect the server. It is therefore vital that mkConn is well
295− -- vetted.
268+ -- vetted.
297− -- We grab the connection before registering timeouts since the
270+ -- We grab the connection before registering timeouts since the
298− -- timeouts will be useless during connection creation, due to the
271+ -- timeouts will be useless during connection creation, due to the
299− -- fact that async exceptions are still masked.
272+ -- fact that async exceptions are still masked.
300− bracket mkConn cleanUp (serve unmask)
273+ bracket mkConn closeConn $ \(conn, transport) ->
302− cleanUp (conn, _) = connClose conn `finally` connFree conn
304 -- We need to register a timeout handler for this thread, and
275 -- We need to register a timeout handler for this thread, and
305 -- cancel that handler as soon as we exit.
276 -- cancel that handler as soon as we exit.
306− serve unmask (conn, transport) = bracket register cancel $ \th -> do
277+ bracket (T.registerKillThread (timeoutManager0 ii0)) T.cancel $ \th ->
279+ let ii1 = toInternalInfo1 ii0 th
307− -- We now have fully registered a connection close handler in
280+ -- We now have fully registered a connection close handler
308− -- the case of all exceptions, so it is safe to once again
281+ -- in the case of all exceptions, so it is safe to one
309− -- allow async exceptions.
282+ -- again allow async exceptions.
310− unmask .
283+ in unmask .
284+ -- Call the user-supplied on exception code if any
285+ -- exceptions are thrown.
286+ handle (settingsOnException set Nothing) .
311− -- Call the user-supplied code for connection open and
288+ -- Call the user-supplied code for connection open and close events
313− bracket (onOpen addr) (onClose addr) $ \goingon ->
289+ bracket (onOpen addr) (onClose addr) $ \goingon ->
314− -- Actually serve this connection. bracket with closeConn
291+ -- Actually serve this connection.
315− -- above ensures the connection is closed.
292+ -- bracket with closeConn above ensures the connection is closed.
316− when goingon $ serveConnection conn ii th addr transport set app
293+ when goingon $ serveConnection conn ii1 addr transport set app
318− register = T.registerKillThread (timeoutManager ii) (connClose conn)
295+ closeConn (conn, _transport) = connClose conn
321 onOpen adr = increase counter >> settingsOnOpen set adr
297 onOpen adr = increase counter >> settingsOnOpen set adr
322 onClose adr _ = decrease counter >> settingsOnClose set adr
298 onClose adr _ = decrease counter >> settingsOnClose set adr
324serveConnection :: Connection
300serveConnection :: Connection
325− -> InternalInfo
301+ -> InternalInfo1
327 -> SockAddr
302 -> SockAddr
328 -> Transport
303 -> Transport
329 -> Settings
304 -> Settings
330 -> Application
305 -> Application
332−serveConnection conn ii th origAddr transport settings app = do
307+serveConnection conn ii1 origAddr transport settings app = do
333 -- fixme: Upgrading to HTTP/2 should be supported.
308 -- fixme: Upgrading to HTTP/2 should be supported.
334 (h2,bs) <- if isHTTP2 transport then
309 (h2,bs) <- if isHTTP2 transport then
335 return (True, "")
310 return (True, "")
@@ -339,39 +314,19 @@ serveConnection conn ii th origAddr transport settings app = do
339 return (True, bs0)
314 return (True, bs0)
341 return (False, bs0)
316 return (False, bs0)
342− istatus <- newIORef False
343 if settingsHTTP2Enabled settings && h2 then do
317 if settingsHTTP2Enabled settings && h2 then do
344− rawRecvN <- makeReceiveN bs (connRecv conn) (connRecvBuf conn)
318+ recvN <- 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
354 -- fixme: origAddr
319 -- fixme: origAddr
356− setConnHTTP2 conn True
357− http2 conn transport ii origAddr settings recvN sendBS app
320+ http2 conn ii1 origAddr transport settings recvN app
322+ istatus <- newIORef False
359 src <- mkSource (wrappedRecv conn th istatus (settingsSlowlorisSize settings))
323 src <- mkSource (wrappedRecv conn th istatus (settingsSlowlorisSize settings))
360 writeIORef istatus True
324 writeIORef istatus True
361 leftoverSource src bs
325 leftoverSource src bs
362 addr <- getProxyProtocolAddr src
326 addr <- getProxyProtocolAddr src
363− http1 True addr istatus src `E.catch` \e ->
327+ http1 addr istatus src `E.catch` \e -> do
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
328+ sendErrorResponse addr istatus e
373− throwIO e
329+ throwIO (e :: SomeException)
376 getProxyProtocolAddr src =
331 getProxyProtocolAddr src =
377 case settingsProxyProtocol settings of
332 case settingsProxyProtocol settings of
@@ -413,40 +368,36 @@ serveConnection conn ii th origAddr transport settings app = do
414 decodeAscii = map (chr . fromEnum) . S.unpack
369 decodeAscii = map (chr . fromEnum) . S.unpack
371+ th = threadHandle1 ii1
416 shouldSendErrorResponse se
373 shouldSendErrorResponse se
417 | Just ConnectionClosedByPeer <- fromException se = False
374 | Just ConnectionClosedByPeer <- fromException se = False
418 | otherwise = True
375 | otherwise = True
420− sendErrorResponse req istatus e = do
377+ sendErrorResponse addr istatus e = do
421 status <- readIORef istatus
378 status <- readIORef istatus
422− if shouldSendErrorResponse e && status
379+ when (shouldSendErrorResponse e && status) $ do
423− then do
380+ let ii = toInternalInfo ii1 0 -- dummy
381+ dreq = dummyreq addr
424− sendResponse settings conn ii th req defaultIndexRequestHeader (return S.empty) (errorResponse e)
382+ void $ sendResponse settings conn ii dreq defaultIndexRequestHeader (return S.empty) (errorResponse e)
427 dummyreq addr = defaultRequest { remoteHost = addr }
384 dummyreq addr = defaultRequest { remoteHost = addr }
429 errorResponse e = settingsOnExceptionResponse settings e
386 errorResponse e = settingsOnExceptionResponse settings e
431− http1 firstRequest addr istatus src = do
388+ http1 addr istatus src = do
432− (req, mremainingRef, idxhdr, nextBodyFlush) <- recvRequest firstRequest settings conn ii th addr src transport
389+ (req', mremainingRef, idxhdr, nextBodyFlush, ii) <- recvRequest settings conn ii1 addr src
390+ let req = req' { isSecure = isTransportSecure transport }
433− keepAlive <- processRequest istatus src req mremainingRef idxhdr nextBodyFlush
391+ keepAlive <- processRequest istatus src req mremainingRef idxhdr nextBodyFlush ii
434 `E.catch` \e -> do
392 `E.catch` \e -> do
393+ -- Call the user-supplied exception handlers, passing the request.
394+ sendErrorResponse addr istatus e
435 settingsOnException settings (Just req) e
395 settingsOnException settings (Just req) e
436 -- Don't throw the error again to prevent calling settingsOnException twice.
396 -- Don't throw the error again to prevent calling settingsOnException twice.
437 return False
397 return False
398+ 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
400+ processRequest istatus src req mremainingRef idxhdr nextBodyFlush ii = do
450 -- Let the application run for as long as it wants
401 -- Let the application run for as long as it wants
451 T.pause th
402 T.pause th
@@ -454,38 +405,30 @@ serveConnection conn ii th origAddr transport settings app = do
454 -- creating the request, we need to make sure that we don't get
405 -- creating the request, we need to make sure that we don't get
455 -- an async exception before calling the ResponseSource.
406 -- an async exception before calling the ResponseSource.
456 keepAliveRef <- newIORef $ error "keepAliveRef not filled"
407 keepAliveRef <- newIORef $ error "keepAliveRef not filled"
457− r <- E.try $ app req $ \res -> do
408+ _ <- app req $ \res -> do
458 T.resume th
409 T.resume th
459 -- FIXME consider forcing evaluation of the res here to
410 -- FIXME consider forcing evaluation of the res here to
460 -- send more meaningful error messages to the user.
411 -- send more meaningful error messages to the user.
461 -- However, it may affect performance.
412 -- However, it may affect performance.
462 writeIORef istatus False
413 writeIORef istatus False
463− keepAlive <- sendResponse settings conn ii th req idxhdr (readSource src) res
414+ keepAlive <- sendResponse settings conn ii req idxhdr (readSource src) res
464 writeIORef keepAliveRef keepAlive
415 writeIORef keepAliveRef keepAlive
465 return ResponseReceived
416 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
417 keepAlive <- readIORef keepAliveRef
477 -- We just send a Response and it takes a time to
419 -- We just send a Response and it takes a time to
478 -- receive a Request again. If we immediately call recv,
420 -- receive a Request again. If we immediately call recv,
479− -- it is likely to fail and cause the IO manager to do some work.
421+ -- it is likely to fail and the IO manager works.
480− -- It is very costly, so we yield to another Haskell
422+ -- It is very costly. So, we yield to another Haskell
481 -- thread hoping that the next Request will arrive
423 -- thread hoping that the next Request will arrive
482 -- when this Haskell thread will be re-scheduled.
424 -- when this Haskell thread will be re-scheduled.
483 -- This improves performance at least when
425 -- This improves performance at least when
484 -- the number of cores is small.
426 -- the number of cores is small.
485 Conc.yield
427 Conc.yield
487− if keepAlive
429+ if not keepAlive then
488− then
430+ return False
489 -- If there is an unknown or large amount of data to still be read
432 -- 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
433 -- from the request body, simple drop this connection instead of
491 -- reading it all in to satisfy a keep-alive request.
434 -- reading it all in to satisfy a keep-alive request.
@@ -511,21 +454,6 @@ serveConnection conn ii th origAddr transport settings app = do
512 return False
455 return False
513 Nothing -> tryKeepAlive
456 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 ()
458flushEntireBody :: IO ByteString -> IO ()
531flushEntireBody src =
459flushEntireBody src =
@@ -558,42 +486,13 @@ wrappedRecv Connection { connRecv = recv } th istatus slowlorisSize = do
558 when (S.length bs >= slowlorisSize) $ T.tickle th
486 when (S.length bs >= slowlorisSize) $ T.tickle th
559 return bs
487 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
489-- Copied from: https://github.com/mzero/plush/blob/master/src/Plush/Server/Warp.hs
579setSocketCloseOnExec :: Socket -> IO ()
490setSocketCloseOnExec :: Socket -> IO ()
580#if WINDOWS
491#if WINDOWS
581setSocketCloseOnExec _ = return ()
492setSocketCloseOnExec _ = return ()
583−setSocketCloseOnExec socket = do
584−#if MIN_VERSION_network(3,0,0)
585− fd <- fdSocket socket
587− let fd = fdSocket socket
589− F.setFileCloseOnExec $ fromIntegral fd
494+setSocketCloseOnExec socket = F.setFileCloseOnExec $ fromIntegral $ fdSocket socket
592−gracefulShutdown :: Settings -> Counter -> IO ()
497+gracefulShutdown :: Counter -> IO ()
593−gracefulShutdown set counter =
498+gracefulShutdown counter = waitForZero counter
594− case settingsGracefulShutdownTimeout set of
598− void (timeout (seconds * microsPerSecond) (waitForZero counter))
599− where microsPerSecond = 1000000