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|
{-# LANGUAGE OverloadedStrings #-}
-- | Simple functions to run TCP clients and servers.
module Network.Run.TCP.Timeout (
runTCPServer,
TimeoutServer,
-- * Generalized API
runTCPServerWithSocket,
openClientSocket,
openServerSocket,
) where
import Control.Concurrent (forkFinally)
import qualified Control.Exception as E
import Control.Monad (forever, void)
import Network.Socket
import qualified System.TimeManager as T
import Network.Run.Core
-- | A server type
type TimeoutServer a =
T.Manager
-- ^ A global timeout manager
-> T.Handle
-- ^ A thread-local timeout handler
-> Socket
-- ^ A connected socket
-> IO a
-- | Running a TCP server with an accepted socket and its peer name.
runTCPServer
:: Int
-- ^ Timeout in second.
-> Maybe HostName
-> ServiceName
-> TimeoutServer a
-> IO a
runTCPServer = runTCPServerWithSocket openServerSocket
----------------------------------------------------------------
-- Generalized API
-- | Generalization of 'runTCPServer'
--
-- See 'Network.Run.TCP.runTCPServerWithSocket' for additional discussion.
runTCPServerWithSocket
:: (AddrInfo -> IO Socket)
-> Int
-- ^ Timeout in second.
-> Maybe HostName
-> ServiceName
-> TimeoutServer a
-> IO a
runTCPServerWithSocket initSocket tm mhost port server = withSocketsDo $ do
T.withManager (tm * 1000000) $ \mgr -> do
addr <- resolve Stream mhost port [AI_PASSIVE]
E.bracket (open addr) close $ loop mgr
where
open addr = E.bracketOnError (initSocket addr) close $ \sock -> do
listen sock 1024
return sock
loop mgr sock = forever $
E.bracketOnError (accept sock) (close . fst) $
\(conn, _peer) ->
void $ forkFinally (server' mgr conn) (const $ gclose conn)
server' mgr conn = do
th <- T.registerKillThread mgr $ return ()
server mgr th conn
|
