@@ -1,145 +1,90 @@
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, forkIOWithUnmask)
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
19−import Data.Char (chr)
20import Data.IORef (IORef, newIORef, readIORef, writeIORef)
16import Data.IORef (IORef, newIORef, readIORef, writeIORef)
21import Data.Streaming.Network (bindPortTCP)
17import Data.Streaming.Network (bindPortTCP)
22−import Foreign.C.Error (Errno(..), eCONNABORTED)
18+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(..))
19+import Network.Socket (accept, withSocketsDo, SockAddr)
26−#if MIN_VERSION_network(3,1,1)
27−import Network.Socket (gracefulClose)
29import qualified Network.Socket.ByteString as Sock
20import qualified Network.Socket.ByteString as Sock
30import Network.Wai
21import 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
22import Network.Wai.Handler.Warp.Buffer
37−import Network.Wai.Handler.Warp.Counter
38import qualified Network.Wai.Handler.Warp.Date as D
23import qualified Network.Wai.Handler.Warp.Date as D
39import qualified Network.Wai.Handler.Warp.FdCache as F
24import 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
25import Network.Wai.Handler.Warp.Header
44−import Network.Wai.Handler.Warp.Imports hiding (readInt)
45−import Network.Wai.Handler.Warp.ReadInt
46import Network.Wai.Handler.Warp.Recv
26import Network.Wai.Handler.Warp.Recv
47import Network.Wai.Handler.Warp.Request
27import Network.Wai.Handler.Warp.Request
48import Network.Wai.Handler.Warp.Response
28import Network.Wai.Handler.Warp.Response
49import Network.Wai.Handler.Warp.SendFile
29import Network.Wai.Handler.Warp.SendFile
50import Network.Wai.Handler.Warp.Settings
30import Network.Wai.Handler.Warp.Settings
31+import qualified Network.Wai.Handler.Warp.Timeout as T
51import Network.Wai.Handler.Warp.Types
32import Network.Wai.Handler.Warp.Types
52−
33+import Network.Wai.Internal (ResponseReceived (ResponseReceived))
34+import System.IO.Error (isFullErrorType, ioeGetErrorType)
54#if WINDOWS
36#if WINDOWS
55import Network.Wai.Handler.Warp.Windows
37import Network.Wai.Handler.Warp.Windows
39+import System.Posix.IO (FdOption(CloseOnExec), setFdOption)
57import Network.Socket (fdSocket)
40import Network.Socket (fdSocket)
60−-- | Creating 'Connection' for plain HTTP based on a given socket.
43+-- | Default action value for 'Connection'.
61−socketConnection :: Settings -> Socket -> IO Connection
44+socketConnection :: Socket -> IO Connection
62−#if MIN_VERSION_network(3,1,1)
63−socketConnection set s = do
65−socketConnection _ s = do
45+socketConnection s = do
66−#endif
46+ readBuf <- allocateBuffer bufferSize
67− bufferPool <- newBufferPool
68 writeBuf <- allocateBuffer bufferSize
47 writeBuf <- allocateBuffer bufferSize
69− let sendall = Sock.sendAll s
70− isH2 <- newIORef False -- HTTP/1.x
71 return Connection {
48 return Connection {
72 connSendMany = Sock.sendMany s
49 connSendMany = Sock.sendMany s
73− , connSendAll = sendall
50+ , connSendAll = Sock.sendAll s
74− , connSendFile = sendFile s writeBuf bufferSize sendall
51+ , connSendFile = defaultSendFile s
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
52+ , connClose = sClose s >> freeBuffer readBuf >> freeBuffer writeBuf
88− , connRecv = receive s bufferPool
53+ , connRecv = receive s readBuf bufferSize
89− , connRecvBuf = receiveBuf s
54+ , connReadBuffer = readBuf
90 , connWriteBuffer = writeBuf
55 , connWriteBuffer = writeBuf
91 , connBufferSize = bufferSize
56 , connBufferSize = bufferSize
92− , connHTTP2 = isH2
57+ , connSendFileOverride = Override s
60+#if __GLASGOW_HASKELL__ < 702
61+allowInterrupt :: IO ()
62+allowInterrupt = unblock $ return ()
95−-- | Run an 'Application' on the given port.
65+-- | Run an 'Application' on the given port. This calls 'runSettings' with
96−-- This calls 'runSettings' with 'defaultSettings'.
66+-- 'defaultSettings'.
97run :: Port -> Application -> IO ()
67run :: Port -> Application -> IO ()
98run p = runSettings defaultSettings { settingsPort = p }
68run p = runSettings defaultSettings { settingsPort = p }
100−-- | Run an 'Application' on the port present in the @PORT@
101−-- environment variable. Uses the 'Port' given when the variable is unset.
102−-- This calls 'runSettings' with 'defaultSettings'.
105−runEnv :: Port -> Application -> IO ()
107− mp <- lookupEnv "PORT"
109− maybe (run p app) runReadPort mp
112− runReadPort :: String -> IO ()
113− runReadPort sp = case reads sp of
114− ((p', _):_) -> run p' app
115− _ -> fail $ "Invalid value in $PORT: " ++ sp
117-- | Run an 'Application' with the given 'Settings'.
70-- | Run an 'Application' with the given 'Settings'.
118−-- This opens a listen socket on the port defined in 'Settings' and
119−-- calls 'runSettingsSocket'.
120runSettings :: Settings -> Application -> IO ()
71runSettings :: Settings -> Application -> IO ()
121runSettings set app = withSocketsDo $
72runSettings set app = withSocketsDo $
123 (bindPortTCP (settingsPort set) (settingsHost set))
74 (bindPortTCP (settingsPort set) (settingsHost set))
125 (\socket -> do
76 (\socket -> do
126 setSocketCloseOnExec socket
77 setSocketCloseOnExec socket
127 runSettingsSocket set socket app)
78 runSettingsSocket set socket app)
129−-- | This installs a shutdown handler for the given socket and
80+-- | Same as 'runSettings', but uses a user-supplied socket instead of opening
130−-- calls 'runSettingsConnection' with the default connection setup action
81+-- one. This allows the user to provide, for example, Unix named socket, which
131−-- which handles plain (non-cipher) HTTP.
132−-- When the listen socket in the second argument is closed, all live
133−-- connections are gracefully shut down.
135−-- The supplied socket can be a Unix named socket, which
136-- can be used when reverse HTTP proxying into your application.
82-- can be used when reverse HTTP proxying into your application.
138-- Note that the 'settingsPort' will still be passed to 'Application's via the
84-- Note that the 'settingsPort' will still be passed to 'Application's via the
139-- 'serverPort' record.
85-- 'serverPort' record.
140runSettingsSocket :: Settings -> Socket -> Application -> IO ()
86runSettingsSocket :: Settings -> Socket -> Application -> IO ()
141−runSettingsSocket set socket app = do
87+runSettingsSocket set socket app =
142− settingsInstallShutdownHandler set closeListenSocket
143 runSettingsConnection set getConn app
88 runSettingsConnection set getConn app
145 getConn = do
90 getConn = do
@@ -149,20 +94,13 @@ runSettingsSocket set socket app = do
149 (s, sa) <- accept socket
94 (s, sa) <- accept socket
151 setSocketCloseOnExec s
96 setSocketCloseOnExec s
152− -- NoDelay causes an error for AF_UNIX.
153− setSocketOption s NoDelay 1 `E.catch` \(E.SomeException _) -> return ()
154− conn <- socketConnection set s
97+ conn <- socketConnection s
155 return (conn, sa)
98 return (conn, sa)
157− closeListenSocket = close socket
100+-- | Allows you to provide a function which will return a 'Connection'. In
158−
101+-- cases where creating the @Connection@ can be expensive, this allows the
159−-- | The connection setup action would be expensive. A good example
160−-- is initialization of TLS.
161−-- So, this converts the connection setup action to the connection maker
162−-- which will be executed after forking a new worker thread.
163−-- Then this calls 'runSettingsConnectionMaker' with the connection maker.
164−-- This allows the expensive computations to be performed
102+-- expensive computations to be performed in a separate thread instead of the
165−-- in a separate worker thread instead of the main server loop.
103+-- main server loop.
167-- Since 1.3.5
105-- Since 1.3.5
168runSettingsConnection :: Settings -> IO (Connection, SockAddr) -> Application -> IO ()
106runSettingsConnection :: Settings -> IO (Connection, SockAddr) -> Application -> IO ()
@@ -172,46 +110,40 @@ runSettingsConnection set getConn app = runSettingsConnectionMaker set getConnMa
172 (conn, sa) <- getConn
110 (conn, sa) <- getConn
173 return (return conn, sa)
111 return (return conn, sa)
175−-- | This modifies the connection maker so that it returns 'TCP' for 'Transport'
176−-- (i.e. plain HTTP) then calls 'runSettingsConnectionMakerSecure'.
177runSettingsConnectionMaker :: Settings -> IO (IO Connection, SockAddr) -> Application -> IO ()
113runSettingsConnectionMaker :: Settings -> IO (IO Connection, SockAddr) -> Application -> IO ()
178runSettingsConnectionMaker x y =
114runSettingsConnectionMaker x y =
179− runSettingsConnectionMakerSecure x (toTCP <$> y)
115+ runSettingsConnectionMakerSecure x (go y)
181− toTCP = first ((, TCP) <$>)
117+ go = fmap (first (fmap (, False)))
183----------------------------------------------------------------
119----------------------------------------------------------------
185−-- | The core run function which takes 'Settings',
121+-- | Allows you to provide a function which will return a function
186−-- a connection maker and 'Application'.
122+-- which will return 'Connection'.
187−-- The connection maker can return a connection of either plain HTTP
190-- Since 2.1.4
124-- Since 2.1.4
191−runSettingsConnectionMakerSecure :: Settings -> IO (IO (Connection, Transport), SockAddr) -> Application -> IO ()
125+runSettingsConnectionMakerSecure :: Settings -> IO (IO (Connection, Bool), SockAddr) -> Application -> IO ()
192runSettingsConnectionMakerSecure set getConnMaker app = do
126runSettingsConnectionMakerSecure set getConnMaker app = do
193 settingsBeforeMainLoop set
127 settingsBeforeMainLoop set
194− counter <- newCounter
128+
129+ D.withDateCache $ \dc ->
130+ F.withFdCache fdCacheDurationInSeconds $ \fc ->
131+ withTimeoutManager $ \tm ->
195− withII $ acceptConnection set getConnMaker app counter
132+ acceptConnection set getConnMaker app dc fc tm
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
134+ fdCacheDurationInSeconds = settingsFdCacheDuration set * 1000000
206− !fdFileInfoDurationInSeconds = settingsFileInfoCacheDuration set * 1000000
207− !timeoutInSeconds = settingsTimeout set * 1000000
208 withTimeoutManager f = case settingsManager set of
135 withTimeoutManager f = case settingsManager set of
209 Just tm -> f tm
136 Just tm -> f tm
210 Nothing -> bracket
137 Nothing -> bracket
211− (T.initialize timeoutInSeconds)
138+ (T.initialize $ settingsTimeout set * 1000000)
212 T.stopManager
139 T.stopManager
142+onE :: Settings -> Maybe Request -> SomeException -> IO ()
143+onE set mreq e = case fromException e of
144+ Just (NotEnoughLines []) -> return ()
145+ _ -> settingsOnException set mreq e
215-- Note that there is a thorough discussion of the exception safety of the
147-- Note that there is a thorough discussion of the exception safety of the
216-- following code at: https://github.com/yesodweb/wai/issues/146
148-- following code at: https://github.com/yesodweb/wai/issues/146
@@ -220,233 +152,134 @@ runSettingsConnectionMakerSecure set getConnMaker app = do
220-- 1. Asynchronous exceptions are not blocked entirely in the main loop.
152-- 1. Asynchronous exceptions are not blocked entirely in the main loop.
221-- Doing so would make it impossible to kill the Warp thread.
153-- Doing so would make it impossible to kill the Warp thread.
223−-- 2. Once a connection maker is received via acceptNewConnection, the
155+-- 2. Once a connection maker is received via getConnLoop, the connection
224−-- connection is guaranteed to be closed, even in the presence of
156+-- is guaranteed to be closed, even in the presence of async exceptions.
227-- Our approach is explained in the comments below.
158-- Our approach is explained in the comments below.
228acceptConnection :: Settings
159acceptConnection :: Settings
229− -> IO (IO (Connection, Transport), SockAddr)
160+ -> IO (IO (Connection, Bool), SockAddr)
230 -> Application
161 -> Application
231− -> Counter
162+ -> D.DateCache
232− -> InternalInfo
163+ -> Maybe F.MutableFdCache
234−acceptConnection set getConnMaker app counter ii = do
235− -- First mask all exceptions in acceptLoop. This is necessary to
166+-- First mask all exceptions in the main loop. This is necessary to ensure
236− -- ensure that no async exception is throw between the call to
167+-- that no async exception is throw between the call to getConnLoop and the
237− -- acceptNewConnection and the registering of connClose.
168+-- registering of connClose.
238− --
169+acceptConnection set getConnMaker app dc fc tm = do
239− -- acceptLoop can be broken by closing the listing socket.
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
247− -- Allow async exceptions before receiving the next connection maker.
170+ -- Allow async exceptions before receiving the next connection maker.
248− allowInterrupt
171+ shutdown <- mask_ $ do
250− -- acceptNewConnection will try to receive the next incoming
172+ -- getConnLoop will try to receive the next incoming
251 -- request. It returns a /connection maker/, not a connection,
173 -- request. It returns a /connection maker/, not a connection,
252 -- since in some circumstances creating a working connection
174 -- since in some circumstances creating a working connection
253 -- from a raw socket may be an expensive operation, and this
175 -- from a raw socket may be an expensive operation, and this
254 -- expensive work should not be performed in the main event
176 -- expensive work should not be performed in the main event
255 -- loop. An example of something expensive would be TLS
177 -- loop. An example of something expensive would be TLS
256 -- negotiation.
178 -- negotiation.
257− mx <- acceptNewConnection
179+ mx <- getConnLoop
258 case mx of
180 case mx of
259− Nothing -> return ()
181+ Nothing -> return True
260 Just (mkConn, addr) -> do
182 Just (mkConn, addr) -> do
261− fork set mkConn addr app counter ii
183+ fork set mkConn addr app dc fc tm
262− acceptLoop
184+ return False
263−
185+ if shutdown then
264− acceptNewConnection = do
186+ gracefulShutdown
188+ acceptConnection set getConnMaker app dc fc tm
265 ex <- try getConnMaker
191 ex <- try getConnMaker
266 case ex of
192 case ex of
267 Right x -> return $ Just x
193 Right x -> return $ Just x
268− Left e -> do
194+ Left e -> do
269− let eConnAborted = getErrno eCONNABORTED
195+ onE set Nothing $ toException e
270− getErrno (Errno cInt) = cInt
196+ if isFullErrorType (ioeGetErrorType e) then do
271− if ioe_errno e == Just eConnAborted
197+ -- "resource exhausted (Too many open files)" may
272− then acceptNewConnection
198+ -- happen by accept(). Wait a second hoping that
199+ -- resource will be available.
274− settingsOnException set Nothing $ toException e
275− return Nothing
203+ return Nothing
277-- Fork a new worker thread for this connection maker, and ask for a
205-- 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).
206-- function to unmask (i.e., allow async exceptions to be thrown).
279fork :: Settings
207fork :: Settings
280− -> IO (Connection, Transport)
208+ -> IO (Connection, Bool)
281 -> SockAddr
209 -> SockAddr
282 -> Application
210 -> Application
283− -> Counter
211+ -> D.DateCache
284− -> InternalInfo
212+ -> Maybe F.MutableFdCache
286−fork set mkConn addr app counter ii = settingsFork set $ \unmask ->
215+fork set mkConn addr app dc fc tm = void $ forkIOWithUnmask $ \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
216+ -- Run the connection maker to get a new connection, and ensure
291− -- that the connection is closed. If the mkConn call throws an
217+ -- that the connection is closed. If the mkConn call throws an
292− -- exception, we will leak the connection. If the mkConn call is
218+ -- exception, we will leak the connection. If the mkConn call is
293− -- vulnerable to attacks (e.g., Slowloris), we do nothing to
219+ -- vulnerable to attacks (e.g., Slowloris), we do nothing to
294− -- protect the server. It is therefore vital that mkConn is well
220+ -- protect the server. It is therefore vital that mkConn is well
295− -- vetted.
221+ -- vetted.
297− -- We grab the connection before registering timeouts since the
223+ -- We grab the connection before registering timeouts since the
298− -- timeouts will be useless during connection creation, due to the
224+ -- timeouts will be useless during connection creation, due to the
299− -- fact that async exceptions are still masked.
225+ -- fact that async exceptions are still masked.
300− bracket mkConn cleanUp (serve unmask)
226+ bracket mkConn closeConn $ \(conn0, isSecure') ->
302− cleanUp (conn, _) = connClose conn `finally` connFree conn
304 -- We need to register a timeout handler for this thread, and
228 -- We need to register a timeout handler for this thread, and
305 -- cancel that handler as soon as we exit.
229 -- cancel that handler as soon as we exit.
306− serve unmask (conn, transport) = bracket register cancel $ \th -> do
230+ bracket (T.registerKillThread tm) T.cancel $ \th ->
232+ let ii = InternalInfo th fc dc
233+ conn = setSendFile conn0 fc
307− -- We now have fully registered a connection close handler in
234+ -- We now have fully registered a connection close handler
308− -- the case of all exceptions, so it is safe to once again
235+ -- in the case of all exceptions, so it is safe to one
309− -- allow async exceptions.
236+ -- again allow async exceptions.
310− unmask .
237+ in unmask .
238+ -- Call the user-supplied on exception code if any
239+ -- exceptions are thrown.
240+ handle (onE set Nothing) .
311− -- Call the user-supplied code for connection open and
242+ -- Call the user-supplied code for connection open and close events
313− bracket (onOpen addr) (onClose addr) $ \goingon ->
243+ bracket (onOpen addr) (onClose addr) $ \goingon ->
314− -- Actually serve this connection. bracket with closeConn
245+ -- Actually serve this connection.
315− -- above ensures the connection is closed.
246+ -- onnClose above ensures the termination of the connection.
316− when goingon $ serveConnection conn ii th addr transport set app
247+ when goingon $ serveConnection conn ii addr isSecure' set app
318− register = T.registerKillThread (timeoutManager ii) (connClose conn)
249+ closeConn (conn, _isSecure) = connClose conn
319− cancel = T.cancel
250+
321− onOpen adr = increase counter >> settingsOnOpen set adr
251+ onOpen = settingsOnOpen set
322− onClose adr _ = decrease counter >> settingsOnClose set adr
252+ onClose adr _ = settingsOnClose set adr
324serveConnection :: Connection
254serveConnection :: Connection
325 -> InternalInfo
255 -> InternalInfo
327 -> SockAddr
256 -> SockAddr
328− -> Transport
257+ -> Bool -- ^ is secure?
329 -> Settings
258 -> Settings
330 -> Application
259 -> Application
332−serveConnection conn ii th origAddr transport settings app = do
261+serveConnection conn ii addr isSecure' 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
262 istatus <- newIORef False
343− if settingsHTTP2Enabled settings && h2 then do
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
356− setConnHTTP2 conn True
357− http2 conn transport ii origAddr settings recvN sendBS app
359− src <- mkSource (wrappedRecv conn th istatus (settingsSlowlorisSize settings))
263+ src <- mkSource (connSource conn th istatus)
360− writeIORef istatus True
361− leftoverSource src bs
362− addr <- getProxyProtocolAddr src
363− http1 True addr istatus src `E.catch` \e ->
264+ recvSendLoop 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
265+ sendErrorResponse istatus e
373− throwIO e
266+ throwIO (e :: SomeException)
376− getProxyProtocolAddr src =
269+ th = threadHandle ii
377− case settingsProxyProtocol settings of
270+
378− ProxyProtocolNone ->
380− ProxyProtocolRequired -> do
381− seg <- readSource src
382− parseProxyProtocolHeader src seg
383− ProxyProtocolOptional -> do
384− seg <- readSource src
385− if S.isPrefixOf "PROXY " seg
386− then parseProxyProtocolHeader src seg
387− else do leftoverSource src seg
390− parseProxyProtocolHeader src seg = do
391− let (header,seg') = S.break (== 0x0d) seg -- 0x0d == CR
392− maybeAddr = case S.split 0x20 header of -- 0x20 == space
393− ["PROXY","TCP4",clientAddr,_,clientPort,_] ->
394− case [x | (x, t) <- reads (decodeAscii clientAddr), null t] of
395− [a] -> Just (SockAddrInet (readInt clientPort)
398− ["PROXY","TCP6",clientAddr,_,clientPort,_] ->
399− case [x | (x, t) <- reads (decodeAscii clientAddr), null t] of
400− [a] -> Just (SockAddrInet6 (readInt clientPort)
405− ("PROXY":"UNKNOWN":_) ->
410− Nothing -> throwIO (BadProxyHeader (decodeAscii header))
411− Just a -> do leftoverSource src (S.drop 2 seg') -- drop CRLF
414− decodeAscii = map (chr . fromEnum) . S.unpack
416− shouldSendErrorResponse se
417− | Just ConnectionClosedByPeer <- fromException se = False
420− sendErrorResponse req istatus e = do
271+ sendErrorResponse istatus e = do
421 status <- readIORef istatus
272 status <- readIORef istatus
422− if shouldSendErrorResponse e && status
273+ when status $ void $
424− sendResponse settings conn ii th req defaultIndexRequestHeader (return S.empty) (errorResponse e)
274+ sendResponse conn ii dummyreq defaultIndexRequestHeader (return S.empty) (errorResponse e)
427− dummyreq addr = defaultRequest { remoteHost = addr }
276+ dummyreq = defaultRequest { remoteHost = addr }
429 errorResponse e = settingsOnExceptionResponse settings e
278 errorResponse e = settingsOnExceptionResponse settings e
431− http1 firstRequest addr istatus src = do
280+ recvSendLoop istatus fromClient = do
432− (req, mremainingRef, idxhdr, nextBodyFlush) <- recvRequest firstRequest settings conn ii th addr src transport
281+ (req', idxhdr) <- recvRequest settings conn ii addr fromClient
433− keepAlive <- processRequest istatus src req mremainingRef idxhdr nextBodyFlush
282+ let req = req' { isSecure = isSecure' }
435− settingsOnException settings (Just req) e
436− -- Don't throw the error again to prevent calling settingsOnException twice.
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
450 -- Let the application run for as long as it wants
283 -- Let the application run for as long as it wants
451 T.pause th
284 T.pause th
@@ -454,146 +287,57 @@ serveConnection conn ii th origAddr transport settings app = do
454 -- creating the request, we need to make sure that we don't get
287 -- creating the request, we need to make sure that we don't get
455 -- an async exception before calling the ResponseSource.
288 -- an async exception before calling the ResponseSource.
456 keepAliveRef <- newIORef $ error "keepAliveRef not filled"
289 keepAliveRef <- newIORef $ error "keepAliveRef not filled"
457− r <- E.try $ app req $ \res -> do
290+ _ <- app req $ \res -> do
458 T.resume th
291 T.resume th
459 -- FIXME consider forcing evaluation of the res here to
292 -- FIXME consider forcing evaluation of the res here to
460 -- send more meaningful error messages to the user.
293 -- send more meaningful error messages to the user.
461 -- However, it may affect performance.
294 -- However, it may affect performance.
462 writeIORef istatus False
295 writeIORef istatus False
463− keepAlive <- sendResponse settings conn ii th req idxhdr (readSource src) res
296+ keepAlive <- sendResponse conn ii req idxhdr (readSource fromClient) res
464 writeIORef keepAliveRef keepAlive
297 writeIORef keepAliveRef keepAlive
465 return ResponseReceived
298 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
299 keepAlive <- readIORef keepAliveRef
477 -- We just send a Response and it takes a time to
301 -- We just send a Response and it takes a time to
478 -- receive a Request again. If we immediately call recv,
302 -- receive a Request again. If we immediately call recv,
479− -- it is likely to fail and cause the IO manager to do some work.
303+ -- it is likely to fail and the IO manager works.
480− -- It is very costly, so we yield to another Haskell
304+ -- It is very costy. So, we yield to another Haskell
481− -- thread hoping that the next Request will arrive
305+ -- thread hoping that the next Request will arraive
482 -- when this Haskell thread will be re-scheduled.
306 -- when this Haskell thread will be re-scheduled.
483 -- This improves performance at least when
307 -- This improves performance at least when
484 -- the number of cores is small.
308 -- the number of cores is small.
485 Conc.yield
309 Conc.yield
487− if keepAlive
311+ when keepAlive $ do
489− -- 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
491− -- reading it all in to satisfy a keep-alive request.
492− case settingsMaximumBodyFlush settings of
494− flushEntireBody nextBodyFlush
497− Just maxToRead -> do
498− let tryKeepAlive = do
499− -- flush the rest of the request body
312+ -- flush the rest of the request body
500− isComplete <- flushBody nextBodyFlush maxToRead
313+ flushBody $ requestBody req
501− if isComplete then do
502− T.resume th
314+ T.resume th
503− return True
315+ recvSendLoop istatus fromClient
506− case mremainingRef of
508− remaining <- readIORef ref
509− if remaining <= maxToRead then
513− 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
530−flushEntireBody :: IO ByteString -> IO ()
317+flushBody :: IO ByteString -> IO ()
531−flushEntireBody src =
318+flushBody src =
534 loop = do
321 loop = do
535 bs <- src
322 bs <- src
536 unless (S.null bs) loop
323 unless (S.null bs) loop
538−flushBody :: IO ByteString -- ^ get next chunk
539− -> Int -- ^ maximum to flush
540− -> IO Bool -- ^ True == flushed the entire body, False == we didn't
546− let toRead' = toRead - S.length bs
549− | S.null bs -> return True
550− | toRead' >= 0 -> loop toRead'
551− | otherwise -> return False
553−wrappedRecv :: Connection -> T.Handle -> IORef Bool -> Int -> IO ByteString
325+connSource :: Connection -> T.Handle -> IORef Bool -> IO ByteString
554−wrappedRecv Connection { connRecv = recv } th istatus slowlorisSize = do
326+connSource Connection { connRecv = recv } th istatus = do
555 bs <- recv
327 bs <- recv
556 unless (S.null bs) $ do
328 unless (S.null bs) $ do
557 writeIORef istatus True
329 writeIORef istatus True
558− when (S.length bs >= slowlorisSize) $ T.tickle th
330+ when (S.length bs >= 2048) $ T.tickle th
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
572 return bs
331 return bs
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
333-- Copied from: https://github.com/mzero/plush/blob/master/src/Plush/Server/Warp.hs
579setSocketCloseOnExec :: Socket -> IO ()
334setSocketCloseOnExec :: Socket -> IO ()
580#if WINDOWS
335#if WINDOWS
581setSocketCloseOnExec _ = return ()
336setSocketCloseOnExec _ = return ()
583−setSocketCloseOnExec socket = do
338+setSocketCloseOnExec socket =
584−#if MIN_VERSION_network(3,0,0)
339+ 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 ()
342+gracefulShutdown :: IO ()
593−gracefulShutdown set counter =
343+gracefulShutdown = return ()
594− case settingsGracefulShutdownTimeout set of
598− void (timeout (seconds * microsPerSecond) (waitForZero counter))
599− where microsPerSecond = 1000000