mirror of
https://github.com/hasura/graphql-engine.git
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63 lines
2.0 KiB
Haskell
63 lines
2.0 KiB
Haskell
{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE TemplateHaskell #-}
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module Hasura.Server.CheckUpdates
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( checkForUpdates
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) where
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import Control.Exception (try)
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import Control.Lens
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import Control.Monad (forever)
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import qualified Control.Concurrent as C
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import qualified Data.Aeson as A
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import qualified Data.Aeson.Casing as A
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import qualified Data.Aeson.TH as A
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import qualified Data.Text as T
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import qualified Network.HTTP.Client as H
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import qualified Network.Wreq as Wreq
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import qualified System.Log.FastLogger as FL
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import Hasura.Logging (LoggerCtx (..))
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import Hasura.Prelude
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import Hasura.Server.Version (currentVersion)
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newtype UpdateInfo
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= UpdateInfo
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{ uiLatest :: T.Text
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} deriving (Show, Eq)
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$(A.deriveJSON (A.aesonDrop 2 A.snakeCase) ''UpdateInfo)
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checkForUpdates :: LoggerCtx -> H.Manager -> IO ()
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checkForUpdates (LoggerCtx loggerSet _ _) manager = do
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let options = Wreq.defaults
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& Wreq.checkResponse ?~ (\_ _ -> return ())
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& Wreq.manager .~ Right manager
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forever $ do
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resp <- try $ Wreq.getWith options $ T.unpack url
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case resp of
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Left ex -> ignoreHttpErr ex
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Right bs -> do
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UpdateInfo latestVersion <- decodeResp $ bs ^. Wreq.responseBody
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when (latestVersion /= currentVersion) $
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FL.pushLogStrLn loggerSet $ FL.toLogStr $ updateMsg latestVersion
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C.threadDelay aDay
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where
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updateMsg v = "Update: A new version is available: " <> v
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url = "https://releases.hasura.io/graphql-engine?agent=server&version="
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<> currentVersion
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aDay = 86400 * 1000 * 1000
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-- ignoring if there is any error in response and returning the current version
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decodeResp bs = case A.eitherDecode bs of
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Left _ -> return $ UpdateInfo currentVersion
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Right a -> return a
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ignoreHttpErr :: H.HttpException -> IO ()
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ignoreHttpErr _ = return ()
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