stackage-server/Application.hs

{-# OPTIONS_GHC -fno-warn-orphans #-}
module Application
    ( makeApplication
    , getApplicationDev
    , makeFoundation
    ) where

import Import
import Settings
import Yesod.Default.Config
import Yesod.Default.Main
import Yesod.Default.Handlers
import Network.Wai.Middleware.RequestLogger
    ( mkRequestLogger, outputFormat, OutputFormat (..), IPAddrSource (..), destination
    )
import qualified Network.Wai.Middleware.RequestLogger as RequestLogger
import qualified Database.Persist
import Control.Monad.Logger (runLoggingT)
import Control.Monad.Reader (runReaderT)
import Control.Concurrent (forkIO, threadDelay)
import System.Log.FastLogger (newStdoutLoggerSet, defaultBufSize, flushLogStr)
import Network.Wai.Logger (clockDateCacher)
import Yesod.Core.Types (loggerSet, Logger (Logger))
import qualified System.Random.MWC as MWC
import qualified Network.Wai as Wai
import Network.Wai.Middleware.MethodOverride (methodOverride)
import Data.BlobStore (fileStore)
import Data.Hackage

-- Import all relevant handler modules here.
-- Don't forget to add new modules to your cabal file!
import Handler.Home
import Handler.Profile
import Handler.Email
import Handler.ResetToken
import Handler.HackageSdist

-- This line actually creates our YesodDispatch instance. It is the second half
-- of the call to mkYesodData which occurs in Foundation.hs. Please see the
-- comments there for more details.
mkYesodDispatch "App" resourcesApp

-- This function allocates resources (such as a database connection pool),
-- performs initialization and creates a WAI application. This is also the
-- place to put your migrate statements to have automatic database
-- migrations handled by Yesod.
makeApplication :: AppConfig DefaultEnv Extra -> IO (Application, LogFunc)
makeApplication conf = do
    foundation <- makeFoundation conf

    -- Initialize the logging middleware
    logWare <- mkRequestLogger def
        { outputFormat =
            if development
                then Detailed True
                else Apache FromSocket
        , destination = RequestLogger.Logger $ loggerSet $ appLogger foundation
        }

    -- Create the WAI application and apply middlewares
    app <- toWaiAppPlain foundation
    let logFunc = messageLoggerSource foundation (appLogger foundation)
        middleware = logWare . defaultWAIMiddleware
    return (middleware app, logFunc)

defaultWAIMiddleware :: Wai.Middleware -- FIXME move upstream
defaultWAIMiddleware = methodOverride

-- | Loads up any necessary settings, creates your foundation datatype, and
-- performs some initialization.
makeFoundation :: AppConfig DefaultEnv Extra -> IO App
makeFoundation conf = do
    manager <- newManager
    s <- staticSite
    dbconf <- withYamlEnvironment "config/postgresql.yml" (appEnv conf)
              Database.Persist.loadConfig >>=
              Database.Persist.applyEnv
    p <- Database.Persist.createPoolConfig (dbconf :: Settings.PersistConf)

    loggerSet' <- newStdoutLoggerSet defaultBufSize
    (getter, updater) <- clockDateCacher

    -- If the Yesod logger (as opposed to the request logger middleware) is
    -- used less than once a second on average, you may prefer to omit this
    -- thread and use "(updater >> getter)" in place of "getter" below.  That
    -- would update the cache every time it is used, instead of every second.
    let updateLoop = do
            threadDelay 1000000
            updater
            flushLogStr loggerSet' -- FIXME include upstream!
            updateLoop
    _ <- forkIO updateLoop

    gen <- MWC.createSystemRandom

    let logger = Yesod.Core.Types.Logger loggerSet' getter
        foundation = App
            { settings = conf
            , getStatic = s
            , connPool = p
            , httpManager = manager
            , persistConfig = dbconf
            , appLogger = logger
            , genIO = gen
            , blobStore =
                case storeConfig $ appExtra conf of
                    BSCFile root -> fileStore root
            }

    -- Perform database migration using our application's logging settings.
    runLoggingT
        (Database.Persist.runPool dbconf (runMigration migrateAll) p)
        (messageLoggerSource foundation logger)

    -- Start the cabal file loader
    void $ forkIO $ forever $ flip runLoggingT (messageLoggerSource foundation logger) $ do
        when development $ liftIO $ threadDelay $ 5 * 60 * 1000000
        eres <- tryAny $ runReaderT loadCabalFiles foundation
        case eres of
            Left e -> $logError $ tshow e
            Right () -> return ()
        liftIO $ threadDelay $ 30 * 60 * 1000000

    return foundation

-- for yesod devel
getApplicationDev :: IO (Int, Application)
getApplicationDev =
    defaultDevelApp loader (fmap fst . makeApplication)
  where
    loader = Yesod.Default.Config.loadConfig (configSettings Development)
        { csParseExtra = parseExtra
        }