blob: 881ce5d2f3c397dab11ff927600dc60bac09e82d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE TypeOperators #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RankNTypes #-}
module ServerC
( doServer
, ConnId(..)
) where
import Network.Socket as Socket
import Data.ByteString.Lazy.Char8 as L
( putStrLn )
import Data.ByteString.Char8
( hGetNonBlocking
)
import qualified Data.ByteString.Char8 as S
( hPutStr
)
import System.IO
( IOMode(..)
, hSetBuffering
, BufferMode(..)
, hWaitForInput
, hClose
, hIsEOF
)
import Control.Monad
import Control.Concurrent (forkIO,threadDelay)
import Control.Exception (handle,SomeException(..))
import Data.HList
import Data.HList.TypeEqGeneric1()
import Data.HList.TypeCastGeneric1()
import System.IO.Error
import Data.Conduit
import Control.Monad.Trans.Class (lift)
import Control.Monad.IO.Class (MonadIO (liftIO))
import qualified Data.ByteString as S (ByteString)
import System.IO (Handle)
import ByteStringOperators
import SocketLike
newtype ConnId = ConnId Int
deriving Eq
data AcceptResult =
GotConnection (Socket,SockAddr)
| Retry
| QuitOnException
doServer ::
MonadIO m =>
HCons Socket.Family (HCons PortNumber l)
-> (HCons RestrictedSocket (HCons ConnId l)
-> Source m S.ByteString
-> Sink S.ByteString m ()
-> IO ())
-> IO Socket
doServer (HCons family port) g = runServer port (runConn g)
where
runServer (HCons port st) go = do
sock <- socket family Stream 0
setSocketOption sock ReuseAddr 1
case family of
AF_INET -> bindSocket sock (SockAddrInet port iNADDR_ANY)
AF_INET6 -> bindSocket sock (SockAddrInet6 port 0 iN6ADDR_ANY 0)
listen sock 2
forkIO $ do
mainLoop sock (ConnId 0) go
-- L.putStrLn $ "quit accept loop"
return sock
where
mainLoop sock idnum@(ConnId n) go = do
let doException ioerror = do
let typ = ioeGetErrorType ioerror
case bshow typ of
-- ResourceExhausted
"resource exhausted" -> return Retry
-- InvalidArgument
"invalid argument" -> L.putStrLn "quit accept-loop." >> return QuitOnException
_ -> do
L.putStrLn ("accept-loop exception: " <++> bshow ioerror <++> "\n")
return QuitOnException
mcon <- handle doException $ fix $ \loop -> do
con <- accept sock
return $ GotConnection con
case mcon of
GotConnection con -> do
forkIO $ go (idnum `HCons` st) con
mainLoop sock (ConnId (n+1)) go
Retry -> threadDelay 500000 >> mainLoop sock idnum go
QuitOnException -> return ()
packets :: MonadIO m => Handle -> Source m S.ByteString
packets h = do
packet <- lift $ liftIO $ getPacket h
yield packet
isEof <- lift $ liftIO $ hIsEOF h
when (not isEof) (packets h)
where
getPacket h = do { hWaitForInput h (-1) ; hGetNonBlocking h 1024 }
outgoing :: MonadIO m => Handle -> Sink S.ByteString m ()
outgoing h = do
mpacket <- await
maybe (return ())
(\r -> (lift . liftIO . S.hPutStr h $ r) >> outgoing h)
mpacket
runConn ::
MonadIO m =>
(HCons RestrictedSocket st
-> Source m S.ByteString
-> Sink S.ByteString m ()
-> IO ())
-> st
-> (Socket, t)
-> IO ()
runConn g st (sock,_) = do
h <- socketToHandle sock ReadWriteMode
hSetBuffering h NoBuffering
let doException (SomeException e) = Prelude.putStrLn ("\n\nexception: " ++ show e ++ "\n\n")
handle doException (g (restrictSocket sock `HCons` st) (packets h) (outgoing h))
hClose h
|
