75 lines
2.0 KiB
Haskell
75 lines
2.0 KiB
Haskell
{-# LANGUAGE RecordWildCards #-}
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{-|
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This is the main module, which actually
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run the Breve webserver.
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-}
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module Main where
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-- Breve modules
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import Application
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import Breve.Settings
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import Breve.UrlTable
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import Paths_breve (getDataFileName)
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-- Data conversions
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import Data.Text (Text, unpack)
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import Data.String (IsString(..))
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import Data.Maybe (listToMaybe)
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-- IO
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import Control.Monad (when, void)
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import Control.Exception as E
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import Control.Concurrent (forkIO)
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import System.Environment (getArgs)
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import Data.Text.IO as T
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-- Web server
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import Servant (Application)
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import Network.Wai.Handler.Warp (run, defaultSettings, setPort, setHost)
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import Network.Wai.Handler.WarpTLS (runTLS, TLSSettings)
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-- Middlewares
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import Network.Wai.Middleware.RequestLogger (logStdout)
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import Network.Wai.Middleware.ForceSSL (forceSSL)
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-- * Helpers
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-- | Runs Breve on the Warp webserver
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runApp :: AppSettings -> Application -> IO ()
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runApp (AppSettings{..}) =
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runTLS tlsSettings warpSettings
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where
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host = unpack bindHost
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warpSettings = setPort bindPort $
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setHost (fromString host) defaultSettings
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-- | Main
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--
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-- Reads the configuration (given as the unique cli argument),
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-- sets things accordingly and runs the webserver.
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main :: IO ()
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main = do
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configPath <- fmap listToMaybe getArgs
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config@(AppSettings{..}) <- settings configPath
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table <- load urlTable
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static <- getDataFileName "static/"
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-- Redirect from HTTP to HTTPS when listening
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-- on the standard port
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when (bindPort == 443) $ void $
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forkIO (run 80 $ forceSSL emptyApp)
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-- Save the table just before exiting
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let exit E.UserInterrupt = save table urlTable
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exit e = throwIO e
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-- Middlewares are functions (Application -> Application).
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-- We use one here to add requests
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let middlewares = logStdout
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handle exit $ do
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T.putStrLn ("Serving on " <> bindUrl)
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runApp config (middlewares $ breve static bindUrl table)
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