89 lines
3.1 KiB
Haskell
89 lines
3.1 KiB
Haskell
{-# LANGUAGE CPP #-}
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module Main where
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import Protolude
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import PostgREST.App
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import PostgREST.Config (AppConfig (..),
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minimumPgVersion,
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prettyVersion,
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readOptions)
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import PostgREST.OpenAPI (isMalformedProxyUri)
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import PostgREST.DbStructure
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import Data.String (IsString (..))
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import Data.Function (id)
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import qualified Hasql.Query as H
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import qualified Hasql.Session as H
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import qualified Hasql.Decoders as HD
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import qualified Hasql.Encoders as HE
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import qualified Hasql.Pool as P
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import Network.Wai.Handler.Warp
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import System.IO (BufferMode (..),
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hSetBuffering)
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import Web.JWT (secret)
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import Data.IORef
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#ifndef mingw32_HOST_OS
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import System.Posix.Signals
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#endif
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isServerVersionSupported :: H.Session Bool
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isServerVersionSupported = do
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ver <- H.query () pgVersion
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return $ toInteger ver >= minimumPgVersion
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where
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pgVersion =
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H.statement "SHOW server_version_num"
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HE.unit (HD.singleRow $ HD.value HD.int4) True
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main :: IO ()
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main = do
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hSetBuffering stdout LineBuffering
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hSetBuffering stdin LineBuffering
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hSetBuffering stderr NoBuffering
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conf <- readOptions
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let host = configHost conf
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port = configPort conf
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proxy = configProxyUri conf
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pgSettings = toS (configDatabase conf)
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appSettings = setHost ((fromString . toS) host)
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. setPort port
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. setServerName (toS $ "postgrest/" <> prettyVersion)
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$ defaultSettings
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when (isMalformedProxyUri $ toS <$> proxy) $ panic
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"Malformed proxy uri, a correct example: https://example.com:8443/basePath"
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unless (secret "secret" /= configJwtSecret conf) $
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putStrLn ("WARNING, running in insecure mode, JWT secret is the default value" :: Text)
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putStrLn $ ("Listening on port " :: Text) <> show (configPort conf)
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pool <- P.acquire (configPool conf, 10, pgSettings)
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result <- P.use pool $ do
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supported <- isServerVersionSupported
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unless supported $ panic (
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"Cannot run in this PostgreSQL version, PostgREST needs at least "
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<> show minimumPgVersion)
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getDbStructure (toS $ configSchema conf)
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refDbStructure <- newIORef $ either (panic . show) id result
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#ifndef mingw32_HOST_OS
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tid <- myThreadId
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forM_ [sigINT, sigTERM] $ \sig ->
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void $ installHandler sig (Catch $ do
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P.release pool
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throwTo tid UserInterrupt
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) Nothing
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void $ installHandler sigHUP (
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Catch . void . P.use pool $ do
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s <- getDbStructure (toS $ configSchema conf)
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liftIO $ atomicWriteIORef refDbStructure s
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) Nothing
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#endif
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runSettings appSettings $ postgrest conf refDbStructure pool
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