| MissingH-1.1.0.3: Large utility library | Contents | Index
Network.SocketServer |
Portability | systems with networking
Stability | experimental
Maintainer | John Goerzen <jgoerzen@complete.org>
Contents
Generic Options and Types TCP server convenient setup Lower-Level Processing Combinators
Description
This module provides an infrastructure to simplify server design. Written by John Goerzen, jgoerzen@complete.org Please note: this module is designed to work with TCP, UDP, and Unix domain sockets, but only TCP sockets have been tested to date. This module is presently under-documented. For an example of usage, please see the description of Network.FTP.Server.
Synopsis
data InetServerOptions = InetServerOptions {
listenQueueSize :: Int
portNumber :: PortNumber
interface :: HostAddress
reuse :: Bool
family :: Family
sockType :: SocketType
protoStr :: String
}
simpleTCPOptions :: Int -> InetServerOptions
data SocketServer = SocketServer {
optionsSS :: InetServerOptions
sockSS :: Socket
}
type HandlerT = Socket -> SockAddr -> SockAddr -> IO ()
serveTCPforever :: InetServerOptions -> HandlerT -> IO ()
setupSocketServer :: InetServerOptions -> IO SocketServer
handleOne :: SocketServer -> HandlerT -> IO ()
serveForever :: SocketServer -> HandlerT -> IO ()
closeSocketServer :: SocketServer -> IO ()
loggingHandler :: String -> Priority -> HandlerT -> HandlerT
threadedHandler :: HandlerT -> HandlerT
handleHandler :: (Handle -> SockAddr -> SockAddr -> IO ()) -> HandlerT
Generic Options and Types
data InetServerOptions
Options for your server.
Constructors
InetServerOptions |
listenQueueSize :: Int |
portNumber :: PortNumber |
interface :: HostAddress |
reuse :: Bool |
family :: Family |
sockType :: SocketType |
protoStr :: String |
Instances
Eq InetServerOptions |
Show InetServerOptions |
simpleTCPOptions
:: Int | Port Number
-> InetServerOptions |
Get Default options. You can always modify it later.
data SocketServer
Constructors
SocketServer |
optionsSS :: InetServerOptions |
sockSS :: Socket |
Instances
Eq SocketServer |
Show SocketServer |
type HandlerT = Socket -> SockAddr -> SockAddr -> IO ()
The main handler type. The first parameter is the socket itself. The second is the address of the remote endpoint. The third is the address of the local endpoint.
TCP server convenient setup
serveTCPforever
:: InetServerOptions | Server options
-> HandlerT | Handler function
-> IO () |
Convenience function to completely set up a TCP `SocketServer` and handle all incoming requests. This function is literally this:
    serveTCPforever options func =
        do sockserv <- setupSocketServer options
           serveForever sockserv func
Lower-Level Processing
setupSocketServer :: InetServerOptions -> IO SocketServer
Takes some options and sets up the `SocketServer`. I will bind and begin listening, but will not accept any connections itself.
handleOne :: SocketServer -> HandlerT -> IO ()
Handle one incoming request from the given `SocketServer`.
serveForever :: SocketServer -> HandlerT -> IO ()
Handle all incoming requests from the given `SocketServer`.
closeSocketServer :: SocketServer -> IO ()
Close the socket server. Does not terminate active handlers, if any.
Combinators
loggingHandler
:: String | Name of logger to use
-> Priority | Priority of logged messages
-> HandlerT | Handler to call after logging
-> HandlerT | Resulting handler
Log each incoming connection using the interface in System.Log.Logger. Log when the incoming connection disconnects. Also, log any failures that may occur in the child handler.
threadedHandler
:: HandlerT | Handler to call in the new thread
-> HandlerT | Resulting handler
Handle each incoming connection in its own thread to make the server multi-tasking.
handleHandler
:: (Handle -> SockAddr -> SockAddr -> IO ()) | Handler to call
-> HandlerT |
Give your handler function a Handle instead of a Socket. The Handle will be opened with ReadWriteMode (you use one handle for both directions of the Socket). Also, it will be initialized with LineBuffering. Unlike other handlers, the handle will be closed when the function returns. Therefore, if you are doing threading, you should to it before you call this handler.
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