52 lines
1.2 KiB
Haskell
52 lines
1.2 KiB
Haskell
{-# LANGUAGE ImplicitPrelude #-}
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-- | Devel web server.
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--
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-- > :l DevelMain
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-- > DevelMain.update
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--
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-- To start/restart the server.
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module DevelMain where
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import Application (getApplicationDev)
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import Control.Concurrent
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import Data.IORef
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import Foreign.Store
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import Network.Wai.Handler.Warp
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import Yesod
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import Yesod.Static
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-- | Start the web server.
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main :: IO (Store (IORef Application))
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main =
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do s <- static "static"
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c <- newChan
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(port,app) <- getApplicationDev True
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ref <- newIORef app
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tid <- forkIO
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(runSettings
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(setPort port defaultSettings)
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(\req cont ->
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do handler <- readIORef ref
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handler req cont))
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_ <- newStore tid
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ref' <- newStore ref
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_ <- newStore c
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return ref'
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-- | Update the server, start it if not running.
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update :: IO (Store (IORef Application))
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update =
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do m <- lookupStore 1
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case m of
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Nothing -> main
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Just store ->
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do ref <- readStore store
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c <- readStore (Store 2)
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writeChan c ()
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s <- static "static"
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(port,app) <- getApplicationDev True
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writeIORef ref app
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return store
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