geniserver-0.8: Main.hs

{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE DeriveDataTypeable #-}
{-
geniserver
Copyright (C) 2011 Eric Kow (on behalf of SRI)

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
-}

module Main (main) where

import Data.Maybe ( fromMaybe )
import System.Environment

import Snap.Http.Server

import NLP.GenI.General ( ePutStrLn )
import NLP.GenI
import NLP.GenI.Configuration
import NLP.GenI.Server
import NLP.GenI.Server.Flag
import qualified NLP.GenI.Configuration as G

main :: IO ()
main = do
    pname    <- getProgName
    confArgs <- treatArgs serverOptions =<< getArgs
    let has = flip hasFlag confArgs
    case () of
        _ | has HelpFlg -> putStrLn (usage serverOptionsSections pname)
          | otherwise   -> startServer confArgs

startServer :: G.Params -> IO ()
startServer confArgs = do
    pst <- initialise confArgs
    wrangler <- defaultCustomSem pst
    ePutStrLn ("Listening on port: " ++ show port)
    httpServe (setPort port defaultConfig) $
        application reqMaxSz pst wrangler
  where
    port     = fromMaybe defaultPort       (getFlag PortFlg confArgs)
    reqMaxSz = fromMaybe defaultReqMaxSize (getFlag ReqMaxSizeFlg confArgs)