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|
{-# LANGUAGE OverloadedStrings #-}
-- | Simple functions to run TCP clients and servers.
module Network.Run.TCP.Timeout (
runTCPServer,
TimeoutServer,
-- * Generalized API
runTCPServerWithSocket,
openServerSocket,
openServerSocketWithOptions,
openServerSocketWithOpts,
) where
import Control.Concurrent (forkFinally)
import qualified Control.Exception as E
import Control.Monad (forever, void)
import qualified Data.List.NonEmpty as NE
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 a connected socket.
runTCPServer
:: Int
-- ^ Timeout in second.
-> Maybe HostName
-> ServiceName
-> TimeoutServer a
-> IO a
runTCPServer tm mhost port server = do
addr <- resolve Stream mhost port [AI_PASSIVE] NE.head
E.bracket (openTCPServerSocket addr) close $ \sock ->
runTCPServerWithSocket tm sock server
-- | Running a TCP client with a connected socket for a given listen
-- socket.
runTCPServerWithSocket
:: Int
-- ^ Timeout in second.
-> Socket
-> TimeoutServer a
-> IO a
runTCPServerWithSocket tm sock server = do
T.withManager (tm * 1000000) $ \mgr -> forever $
E.bracketOnError (accept sock) (close . fst) $ \(conn, _peer) ->
void $ forkFinally (server' mgr conn) (const $ gclose conn)
where
server' mgr conn = do
labelMe "TCP timeout server"
T.withHandle mgr (return ()) $ \th -> server mgr th conn
|
