blob: 369bd5383a7a0d5e4c4cfd714f7cc321ebbbcd13 (
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
|
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE TypeOperators #-}
{-# LANGUAGE OverloadedStrings #-}
module Server where
import Network.Socket
import Data.ByteString.Lazy.Char8 as L
( fromChunks
, putStrLn )
import Data.ByteString.Char8
( hGetNonBlocking
)
import System.IO
( IOMode(..)
, hSetBuffering
, BufferMode(..)
, hWaitForInput
, hClose
, hIsEOF
)
import Control.Monad
import Control.Concurrent (forkIO)
import Control.Exception (handle,SomeException(..))
import Data.HList
import Data.HList.TypeEqGeneric1()
import Data.HList.TypeCastGeneric1()
import System.IO.Error
import ByteStringOperators
newtype ConnId = ConnId Int
deriving Eq
newtype ConnectionFinalizer = ConnectionFinalizer (IO ())
getPacket h = do { hWaitForInput h (-1) ; fmap (fromChunks . (:[])) $ hGetNonBlocking h 1024 }
{-
doServer ::
HList st
=> PortNumber :*: st
-> ( Handle :*: ConnId :*: PortNumber :*: st
-> S.ByteString
-> (() -> IO ())
-> IO () )
-> IO b
-}
{-
doServer
:: (HOccursFst ConnectionFinalizer l, HList t) =>
HCons PortNumber t
-> (l
-> ByteString
-> (() -> IO ())
-> IO ())
-> (Socket
-> HCons
Handle (HCons ConnId (HCons PortNumber t))
-> IO l)
-> IO Socket
-}
doServer port g startCon = runServer2 port (runConn2 g)
where
runConn2 g st (sock,_) = do
h <- socketToHandle sock ReadWriteMode
hSetBuffering h NoBuffering
st'' <- startCon sock (h .*. st)
let doException (SomeException e) = Prelude.putStrLn ("\n\nexception: " ++ show e ++ "\n\n")
handle doException $ fix $ \loop -> do
let continue () = hIsEOF h >>= flip when loop . not
packet <- getPacket h
g st'' packet continue
let ConnectionFinalizer cleanup = hOccursFst st''
cleanup
hClose h
{-
runServer2 ::
Num num =>
PortNumber -> (num -> (Socket, SockAddr) -> IO b -> IO b) -> IO b
-}
runServer2 st@(HCons port _) go = do
sock <- socket AF_INET Stream 0
setSocketOption sock ReuseAddr 1
bindSocket sock (SockAddrInet port iNADDR_ANY)
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
if -- typ == InvalidArgument
-- but the symbol is not exported :/
bshow typ=="invalid argument"
then do
L.putStrLn $ "quit accept-loop."
else do
L.putStrLn ("accept-loop exception: " <++> bshow ioerror <++> "\n")
return Nothing
mcon <- handle doException $ fix $ \loop -> do
con <- accept sock
return $ Just con
case mcon of
Just con -> do
forkIO $ go (idnum .*. st) con
mainLoop sock (ConnId (n+1)) go
Nothing -> return ()
|
