Use http-client-openssl for internal downloader
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ghcup.cabal
27
ghcup.cabal
@ -105,11 +105,14 @@ common hpath-io
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common hpath-posix
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build-depends: hpath-posix >=0.13.2
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common http-io-streams
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build-depends: http-io-streams >=0.1.2.0
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common http-client
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build-depends: http-client >=0.7.1
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common io-streams
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build-depends: io-streams >=1.5
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common http-client-openssl
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build-depends: http-client-openssl >=0.3.1.0
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common http-types
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build-depends: http-types >=0.12.3
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common libarchive
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build-depends: libarchive >= 2.2.5.0
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@ -120,6 +123,9 @@ common lzma
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common megaparsec
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build-depends: megaparsec >=8.0.0
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common monad-control
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build-depends: monad-control >=1.0.2.3
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common monad-logger
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build-depends: monad-logger >=0.3.31
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@ -189,6 +195,9 @@ common time
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common transformers
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build-depends: transformers >=0.5
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common transformers-base
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build-depends: transformers-base >=0.4.4
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common os-release
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build-depends: os-release >=1.0.0
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@ -263,6 +272,7 @@ library
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, hpath-posix
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, lzma
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, megaparsec
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, monad-control
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, monad-logger
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, mtl
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, optics
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@ -282,6 +292,7 @@ library
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, text
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, time
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, transformers
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, transformers-base
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, os-release
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, unix
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, unix-bytestring
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@ -299,7 +310,6 @@ library
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GHCup.Data.GHCupInfo
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GHCup.Data.ToolRequirements
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GHCup.Download
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GHCup.Download.Utils
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GHCup.Errors
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GHCup.Platform
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GHCup.Requirements
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@ -323,10 +333,11 @@ library
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if flag(internal-downloader)
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import:
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HsOpenSSL
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, http-io-streams
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, io-streams
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, http-client
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, http-client-openssl
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, http-types
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, terminal-progress-bar
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exposed-modules: GHCup.Download.IOStreams
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exposed-modules: GHCup.Download.Internal
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cpp-options: -DINTERNAL_DOWNLOADER
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if flag(tar)
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@ -12,8 +12,7 @@
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module GHCup.Download where
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#if defined(INTERNAL_DOWNLOADER)
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import GHCup.Download.IOStreams
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import GHCup.Download.Utils
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import GHCup.Download.Internal
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#endif
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import GHCup.Errors
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import GHCup.Types
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@ -233,6 +232,9 @@ getDownloads urlSource = do
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#if !defined(INTERNAL_DOWNLOADER)
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pure Nothing
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#else
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Settings{..} <- lift ask
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case downloader of
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Internal -> do
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headers <-
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handleIO (\_ -> pure mempty)
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$ liftE
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@ -243,6 +245,7 @@ getDownloads urlSource = do
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$ getHead uri'
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)
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pure $ parseModifiedHeader headers
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_ -> pure Nothing
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parseModifiedHeader :: (M.Map (CI ByteString) ByteString) -> Maybe UTCTime
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parseModifiedHeader headers =
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@ -339,9 +342,7 @@ download dli dest mfn
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liftE $ lEM @_ @'[ProcessError] $ liftIO $ exec "wget" True
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(o' ++ ["-O", toFilePath destFile , serializeURIRef' $ view dlUri dli]) Nothing Nothing
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#if defined(INTERNAL_DOWNLOADER)
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Internal -> do
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(https, host, fullPath, port) <- liftE $ uriToQuadruple (view dlUri dli)
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liftE $ downloadToFile https host fullPath port destFile
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Internal -> liftE $ downloadToFile (_dlUri dli) destFile
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#endif
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liftE $ checkDigest dli destFile
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@ -408,10 +409,8 @@ downloadBS :: (MonadReader Settings m, MonadCatch m, MonadIO m, MonadLogger m)
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m
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L.ByteString
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downloadBS uri'
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| scheme == "https"
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= dl True
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| scheme == "http"
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= dl False
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| scheme == "https" || scheme == "http"
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= dl
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| scheme == "file"
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= liftIOException doesNotExistErrorType (FileDoesNotExistError path)
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$ (liftIO $ RD.readFile path)
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@ -421,11 +420,7 @@ downloadBS uri'
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where
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scheme = view (uriSchemeL' % schemeBSL') uri'
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path = view pathL' uri'
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#if defined(INTERNAL_DOWNLOADER)
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dl https = do
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#else
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dl _ = do
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#endif
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dl = do
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lift $ $(logDebug) [i|downloading: #{serializeURIRef' uri'}|]
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lift getDownloader >>= \case
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Curl -> do
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@ -445,9 +440,7 @@ downloadBS uri'
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pure $ L.fromStrict stdout
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CapturedProcess (ExitFailure i') _ _ -> throwE $ NonZeroExit i' (toFilePath exe) args
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#if defined(INTERNAL_DOWNLOADER)
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Internal -> do
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(_, host', fullPath', port') <- liftE $ uriToQuadruple uri'
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liftE $ downloadBS' https host' fullPath' port'
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Internal -> liftE $ downloadBS' uri'
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#endif
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@ -1,253 +0,0 @@
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{-# LANGUAGE DataKinds #-}
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{-# LANGUAGE DeriveGeneric #-}
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{-# LANGUAGE FlexibleContexts #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE QuasiQuotes #-}
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{-# LANGUAGE TemplateHaskell #-}
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{-# LANGUAGE TypeApplications #-}
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{-# LANGUAGE TypeFamilies #-}
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module GHCup.Download.IOStreams where
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import GHCup.Download.Utils
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import GHCup.Errors
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import GHCup.Types.Optics
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import GHCup.Types.JSON ( )
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import GHCup.Utils.File
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import GHCup.Utils.Prelude
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import Control.Applicative
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import Control.Exception.Safe
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import Control.Monad
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import Control.Monad.Reader
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import Data.ByteString ( ByteString )
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import Data.ByteString.Builder
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import Data.CaseInsensitive ( CI )
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import Data.IORef
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import Data.Maybe
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import Data.Text.Read
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import HPath
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import HPath.IO as HIO
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import Haskus.Utils.Variant.Excepts
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import Network.Http.Client hiding ( URL )
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import Optics
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import Prelude hiding ( abs
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, readFile
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, writeFile
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)
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import "unix" System.Posix.IO.ByteString
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hiding ( fdWrite )
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import "unix-bytestring" System.Posix.IO.ByteString
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( fdWrite )
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import System.ProgressBar
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import URI.ByteString
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import qualified Data.ByteString as BS
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import qualified Data.ByteString.Lazy as L
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import qualified Data.Map.Strict as M
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import qualified System.IO.Streams as Streams
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----------------------------
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--[ Low-level (non-curl) ]--
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----------------------------
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-- | Load the result of this download into memory at once.
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downloadBS' :: MonadIO m
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=> Bool -- ^ https?
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-> ByteString -- ^ host (e.g. "www.example.com")
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-> ByteString -- ^ path (e.g. "/my/file") including query
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-> Maybe Int -- ^ optional port (e.g. 3000)
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-> Excepts
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'[ HTTPStatusError
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, URIParseError
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, UnsupportedScheme
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, NoLocationHeader
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, TooManyRedirs
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]
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m
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(L.ByteString)
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downloadBS' https host path port = do
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bref <- liftIO $ newIORef (mempty :: Builder)
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let stepper bs = modifyIORef bref (<> byteString bs)
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downloadInternal False https host path port stepper
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liftIO (readIORef bref <&> toLazyByteString)
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downloadToFile :: (MonadMask m, MonadIO m)
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=> Bool -- ^ https?
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-> ByteString -- ^ host (e.g. "www.example.com")
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-> ByteString -- ^ path (e.g. "/my/file") including query
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-> Maybe Int -- ^ optional port (e.g. 3000)
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-> Path Abs -- ^ destination file to create and write to
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-> Excepts '[DownloadFailed] m ()
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downloadToFile https host fullPath port destFile = do
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fd <- liftIO $ createRegularFileFd newFilePerms destFile
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let stepper = fdWrite fd
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flip finally (liftIO $ closeFd fd)
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$ reThrowAll DownloadFailed $ downloadInternal True https host fullPath port stepper
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downloadInternal :: MonadIO m
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=> Bool -- ^ whether to show a progress bar
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-> Bool -- ^ https?
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-> ByteString -- ^ host
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-> ByteString -- ^ path with query
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-> Maybe Int -- ^ optional port
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-> (ByteString -> IO a) -- ^ the consuming step function
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-> Excepts
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'[ HTTPStatusError
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, URIParseError
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, UnsupportedScheme
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, NoLocationHeader
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, TooManyRedirs
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]
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m
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()
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downloadInternal = go (5 :: Int)
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where
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go redirs progressBar https host path port consumer = do
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r <- liftIO $ withConnection' https host port action
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veitherToExcepts r >>= \case
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Just r' ->
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if redirs > 0 then followRedirectURL r' else throwE TooManyRedirs
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Nothing -> pure ()
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where
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action c = do
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let q = buildRequest1 $ http GET path
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sendRequest c q emptyBody
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receiveResponse
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c
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(\r i' -> runE $ do
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let scode = getStatusCode r
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if
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| scode >= 200 && scode < 300 -> downloadStream r i' >> pure Nothing
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| scode >= 300 && scode < 400 -> case getHeader r "Location" of
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Just r' -> pure $ Just $ r'
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Nothing -> throwE NoLocationHeader
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| otherwise -> throwE $ HTTPStatusError scode
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)
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followRedirectURL bs = case parseURI strictURIParserOptions bs of
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Right uri' -> do
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(https', host', fullPath', port') <- liftE $ uriToQuadruple uri'
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go (redirs - 1) progressBar https' host' fullPath' port' consumer
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Left e -> throwE e
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downloadStream r i' = do
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let size = case getHeader r "Content-Length" of
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Just x' -> case decimal $ decUTF8Safe x' of
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Left _ -> 0
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Right (r', _) -> r'
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Nothing -> 0
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mpb <- if progressBar
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then Just <$> (liftIO $ newProgressBar defStyle 10 (Progress 0 size ()))
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else pure Nothing
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outStream <- liftIO $ Streams.makeOutputStream
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(\case
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Just bs -> do
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forM_ mpb $ \pb -> incProgress pb (BS.length bs)
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void $ consumer bs
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Nothing -> pure ()
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)
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liftIO $ Streams.connect i' outStream
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getHead :: (MonadCatch m, MonadIO m)
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=> URI
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-> Excepts
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'[ HTTPStatusError
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, URIParseError
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, UnsupportedScheme
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, NoLocationHeader
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, TooManyRedirs
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, ProcessError
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]
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m
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(M.Map (CI ByteString) ByteString)
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getHead uri' | scheme == "https" = head' True
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| scheme == "http" = head' False
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| otherwise = throwE UnsupportedScheme
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where
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scheme = view (uriSchemeL' % schemeBSL') uri'
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head' https = do
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(_, host', fullPath', port') <- liftE $ uriToQuadruple uri'
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liftE $ headInternal https host' fullPath' port'
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headInternal :: MonadIO m
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=> Bool -- ^ https?
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-> ByteString -- ^ host
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-> ByteString -- ^ path with query
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-> Maybe Int -- ^ optional port
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-> Excepts
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'[ HTTPStatusError
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, URIParseError
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, UnsupportedScheme
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, TooManyRedirs
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, NoLocationHeader
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]
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m
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(M.Map (CI ByteString) ByteString)
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headInternal = go (5 :: Int)
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where
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go redirs https host path port = do
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r <- liftIO $ withConnection' https host port action
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veitherToExcepts r >>= \case
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Left r' ->
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if redirs > 0 then followRedirectURL r' else throwE TooManyRedirs
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Right hs -> pure hs
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where
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action c = do
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let q = buildRequest1 $ http HEAD path
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sendRequest c q emptyBody
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unsafeReceiveResponse
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c
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(\r _ -> runE $ do
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let scode = getStatusCode r
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if
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| scode >= 200 && scode < 300 -> do
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let headers = getHeaderMap r
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pure $ Right $ headers
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| scode >= 300 && scode < 400 -> case getHeader r "Location" of
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Just r' -> pure $ Left $ r'
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Nothing -> throwE NoLocationHeader
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| otherwise -> throwE $ HTTPStatusError scode
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)
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followRedirectURL bs = case parseURI strictURIParserOptions bs of
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Right uri' -> do
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(https', host', fullPath', port') <- liftE $ uriToQuadruple uri'
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go (redirs - 1) https' host' fullPath' port'
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Left e -> throwE e
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withConnection' :: Bool
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-> ByteString
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-> Maybe Int
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-> (Connection -> IO a)
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-> IO a
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withConnection' https host port action = bracket acquire closeConnection action
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where
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acquire = case https of
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True -> do
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ctx <- baselineContextSSL
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openConnectionSSL ctx host (fromIntegral $ fromMaybe 443 port)
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False -> openConnection host (fromIntegral $ fromMaybe 80 port)
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213
lib/GHCup/Download/Internal.hs
Normal file
213
lib/GHCup/Download/Internal.hs
Normal file
@ -0,0 +1,213 @@
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{-# LANGUAGE CPP #-}
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{-# LANGUAGE DataKinds #-}
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{-# LANGUAGE DeriveGeneric #-}
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{-# LANGUAGE FlexibleContexts #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE QuasiQuotes #-}
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{-# LANGUAGE TemplateHaskell #-}
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{-# LANGUAGE TypeApplications #-}
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{-# LANGUAGE TypeFamilies #-}
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|
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module GHCup.Download.Internal where
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|
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import GHCup.Errors
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import GHCup.Types.Optics
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import GHCup.Types.JSON ( )
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import GHCup.Utils.File
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import GHCup.Utils.Prelude
|
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|
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import Control.Applicative
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import Control.Exception.Safe
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import Control.Monad
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import Control.Monad.Reader
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import Data.ByteString ( ByteString )
|
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import Data.ByteString.Builder
|
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import Data.CaseInsensitive ( CI )
|
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import Data.IORef
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import Data.Maybe
|
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import Data.Text.Read
|
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import HPath
|
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import HPath.IO as HIO
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import Haskus.Utils.Variant.Excepts
|
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import Network.HTTP.Client
|
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import Network.HTTP.Client.OpenSSL
|
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import Network.HTTP.Types.Status
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import Network.HTTP.Types.Header
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import Optics
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import Prelude hiding ( abs
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, readFile
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, writeFile
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)
|
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import "unix" System.Posix.IO.ByteString
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hiding ( fdWrite )
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import "unix-bytestring" System.Posix.IO.ByteString
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( fdWrite )
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import System.ProgressBar
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import URI.ByteString
|
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|
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import qualified Data.ByteString as BS
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import qualified Data.ByteString.Lazy as L
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import qualified Data.Map.Strict as M
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import qualified Data.Text as T
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import qualified OpenSSL.Session as SSL
|
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|
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|
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|
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|
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|
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----------------------------
|
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--[ Low-level (non-curl) ]--
|
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----------------------------
|
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|
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|
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-- | Load the result of this download into memory at once.
|
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downloadBS' :: (MonadThrow m, MonadIO m)
|
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=> URI
|
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-> Excepts
|
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'[HTTPStatusError]
|
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m
|
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(L.ByteString)
|
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downloadBS' uri' = do
|
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bref <- liftIO $ newIORef (mempty :: Builder)
|
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let stepper bs = modifyIORef bref (<> byteString bs)
|
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downloadInternal False
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(T.unpack . decUTF8Safe . serializeURIRef' $ uri')
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stepper
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liftIO (readIORef bref <&> toLazyByteString)
|
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|
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|
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downloadToFile :: (MonadMask m, MonadIO m)
|
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=> URI
|
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-> Path Abs -- ^ destination file to create and write to
|
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-> Excepts '[DownloadFailed] m ()
|
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downloadToFile uri' destFile = do
|
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fd <- liftIO $ createRegularFileFd newFilePerms destFile
|
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let stepper = fdWrite fd
|
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flip finally (liftIO $ closeFd fd)
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$ reThrowAll DownloadFailed
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$ downloadInternal True
|
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(T.unpack . decUTF8Safe . serializeURIRef' $ uri')
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stepper
|
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|
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|
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downloadInternal :: (MonadThrow m, MonadIO m)
|
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=> Bool -- ^ whether to show a progress bar
|
||||
-> String
|
||||
-> (ByteString -> IO a) -- ^ the consuming step function
|
||||
-> Excepts
|
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'[HTTPStatusError]
|
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m
|
||||
()
|
||||
downloadInternal progressBar uri' consumer = lEM $ liftIO $ withConnection' action
|
||||
where
|
||||
action :: (MonadThrow m, MonadIO m) => Manager -> m (Either HTTPStatusError ())
|
||||
action m = do
|
||||
request <- parseRequest ("GET " <> uri')
|
||||
liftIO $ withResponse
|
||||
request
|
||||
m
|
||||
(\r -> do
|
||||
let scode = statusCode . responseStatus $ r
|
||||
if
|
||||
| scode >= 200 && scode < 300 ->
|
||||
let headers = M.fromList . responseHeaders $ r
|
||||
in fmap Right $ liftIO $ downloadStream (responseBody r) headers
|
||||
| otherwise -> pure $ Left $ HTTPStatusError scode
|
||||
)
|
||||
|
||||
downloadStream :: BodyReader -> M.Map HeaderName ByteString -> IO ()
|
||||
downloadStream br headers = do
|
||||
let size = case M.lookup "Content-Length" headers of
|
||||
Just x' -> case decimal $ decUTF8Safe x' of
|
||||
Left _ -> 0
|
||||
Right (r', _) -> r'
|
||||
Nothing -> 0
|
||||
|
||||
mpb <- if progressBar
|
||||
then Just <$> (liftIO $ newProgressBar defStyle 10 (Progress 0 size ()))
|
||||
else pure Nothing
|
||||
|
||||
loop mpb
|
||||
|
||||
where
|
||||
loop mpb = do
|
||||
bs <- brRead br
|
||||
if BS.length bs == 0 then pure () else do
|
||||
void $ consumer bs
|
||||
forM_ mpb $ \pb -> incProgress pb (BS.length bs)
|
||||
loop mpb
|
||||
|
||||
|
||||
getHead :: (MonadCatch m, MonadIO m)
|
||||
=> URI
|
||||
-> Excepts
|
||||
'[HTTPStatusError, UnsupportedScheme]
|
||||
m
|
||||
(M.Map (CI ByteString) ByteString)
|
||||
getHead uri' | scheme == "https" || scheme == "http" = head'
|
||||
| otherwise = throwE UnsupportedScheme
|
||||
|
||||
where
|
||||
scheme = view (uriSchemeL' % schemeBSL') uri'
|
||||
head' =
|
||||
liftE $ headInternal (T.unpack . decUTF8Safe . serializeURIRef' $ uri')
|
||||
|
||||
|
||||
headInternal :: (MonadThrow m, MonadIO m)
|
||||
=> String
|
||||
-> Excepts
|
||||
'[HTTPStatusError]
|
||||
m
|
||||
(M.Map (CI ByteString) ByteString)
|
||||
headInternal uri' = lEM $ liftIO $ withConnection' action
|
||||
where
|
||||
action :: (MonadThrow m, MonadIO m)
|
||||
=> Manager
|
||||
-> m (Either HTTPStatusError (M.Map (CI ByteString) ByteString))
|
||||
action m = do
|
||||
request <- parseRequest ("HEAD " <> uri')
|
||||
liftIO $ withResponse
|
||||
request
|
||||
m
|
||||
(\r -> do
|
||||
let scode = statusCode . responseStatus $ r
|
||||
if
|
||||
| scode >= 200 && scode < 300 -> do
|
||||
let headers = responseHeaders r
|
||||
pure $ Right $ M.fromList $ headers
|
||||
| otherwise -> pure $ Left (HTTPStatusError scode)
|
||||
)
|
||||
|
||||
|
||||
withConnection' :: (Manager -> IO a) -> IO a
|
||||
withConnection' action = do
|
||||
mg <- newManager $ opensslManagerSettings baselineContextSSL
|
||||
withOpenSSL (action mg)
|
||||
|
||||
|
||||
baselineContextSSL :: IO SSL.SSLContext
|
||||
baselineContextSSL = withOpenSSL $ do
|
||||
ctx <- SSL.context
|
||||
SSL.contextSetDefaultCiphers ctx
|
||||
#if defined(darwin_HOST_OS)
|
||||
SSL.contextSetVerificationMode ctx SSL.VerifyNone
|
||||
#elif defined(mingw32_HOST_OS)
|
||||
SSL.contextSetVerificationMode ctx SSL.VerifyNone
|
||||
#elif defined(freebsd_HOST_OS)
|
||||
SSL.contextSetCAFile ctx "/usr/local/etc/ssl/cert.pem"
|
||||
SSL.contextSetVerificationMode ctx $ SSL.VerifyPeer True True Nothing
|
||||
#elif defined(openbsd_HOST_OS)
|
||||
SSL.contextSetCAFile ctx "/etc/ssl/cert.pem"
|
||||
SSL.contextSetVerificationMode ctx $ SSL.VerifyPeer True True Nothing
|
||||
#else
|
||||
fedora <- doesDirectoryExist [abs|/etc/pki/tls|]
|
||||
if fedora
|
||||
then do
|
||||
SSL.contextSetCAFile ctx "/etc/pki/tls/certs/ca-bundle.crt"
|
||||
else do
|
||||
SSL.contextSetCADirectory ctx "/etc/ssl/certs"
|
||||
SSL.contextSetVerificationMode ctx $ SSL.VerifyPeer True True Nothing
|
||||
#endif
|
||||
return ctx
|
||||
@ -1,64 +0,0 @@
|
||||
{-# LANGUAGE DataKinds #-}
|
||||
{-# LANGUAGE DeriveGeneric #-}
|
||||
{-# LANGUAGE FlexibleContexts #-}
|
||||
{-# LANGUAGE OverloadedStrings #-}
|
||||
{-# LANGUAGE QuasiQuotes #-}
|
||||
{-# LANGUAGE TemplateHaskell #-}
|
||||
{-# LANGUAGE TypeApplications #-}
|
||||
{-# LANGUAGE TypeFamilies #-}
|
||||
|
||||
|
||||
module GHCup.Download.Utils where
|
||||
|
||||
|
||||
import GHCup.Errors
|
||||
import GHCup.Types.Optics
|
||||
import GHCup.Types.JSON ( )
|
||||
import GHCup.Utils.Prelude
|
||||
|
||||
import Control.Applicative
|
||||
import Control.Monad
|
||||
import Data.ByteString ( ByteString )
|
||||
import Data.Maybe
|
||||
import Haskus.Utils.Variant.Excepts
|
||||
import Optics
|
||||
import Prelude hiding ( abs
|
||||
, readFile
|
||||
, writeFile
|
||||
)
|
||||
import URI.ByteString
|
||||
|
||||
import qualified Data.Binary.Builder as B
|
||||
import qualified Data.ByteString as BS
|
||||
import qualified Data.ByteString.Lazy as L
|
||||
|
||||
|
||||
-- | Extracts from a URI type: (https?, host, path+query, port)
|
||||
uriToQuadruple :: Monad m
|
||||
=> URI
|
||||
-> Excepts
|
||||
'[UnsupportedScheme]
|
||||
m
|
||||
(Bool, ByteString, ByteString, Maybe Int)
|
||||
uriToQuadruple URI {..} = do
|
||||
let scheme = view schemeBSL' uriScheme
|
||||
|
||||
host <-
|
||||
preview (_Just % authorityHostL' % hostBSL') uriAuthority
|
||||
?? UnsupportedScheme
|
||||
|
||||
https <- if
|
||||
| scheme == "https" -> pure True
|
||||
| scheme == "http" -> pure False
|
||||
| otherwise -> throwE UnsupportedScheme
|
||||
|
||||
let queryBS =
|
||||
BS.intercalate "&"
|
||||
. fmap (\(x, y) -> encodeQuery x <> "=" <> encodeQuery y)
|
||||
$ (queryPairs uriQuery)
|
||||
port =
|
||||
preview (_Just % authorityPortL' % _Just % portNumberL') uriAuthority
|
||||
fullpath = if BS.null queryBS then uriPath else uriPath <> "?" <> queryBS
|
||||
pure (https, host, fullpath, port)
|
||||
where encodeQuery = L.toStrict . B.toLazyByteString . urlEncodeQuery
|
||||
|
||||
@ -1,8 +1,12 @@
|
||||
{-# OPTIONS_GHC -Wno-orphans #-}
|
||||
|
||||
{-# LANGUAGE DataKinds #-}
|
||||
{-# LANGUAGE DeriveLift #-}
|
||||
{-# LANGUAGE FlexibleContexts #-}
|
||||
{-# LANGUAGE FlexibleInstances #-}
|
||||
{-# LANGUAGE QuasiQuotes #-}
|
||||
{-# LANGUAGE MultiParamTypeClasses #-}
|
||||
{-# LANGUAGE UndecidableInstances #-}
|
||||
{-# LANGUAGE ScopedTypeVariables #-}
|
||||
{-# LANGUAGE TypeApplications #-}
|
||||
{-# LANGUAGE TypeFamilies #-}
|
||||
@ -13,8 +17,10 @@ module GHCup.Utils.Prelude where
|
||||
import Control.Applicative
|
||||
import Control.Exception.Safe
|
||||
import Control.Monad
|
||||
import Control.Monad.Base
|
||||
import Control.Monad.IO.Class
|
||||
import Control.Monad.Trans.Class ( lift )
|
||||
import Control.Monad.Trans.Control
|
||||
import Data.Bifunctor
|
||||
import Data.ByteString ( ByteString )
|
||||
import Data.String
|
||||
@ -264,3 +270,40 @@ decUTF8Safe = E.decodeUtf8With E.lenientDecode
|
||||
|
||||
decUTF8Safe' :: L.ByteString -> Text
|
||||
decUTF8Safe' = TL.toStrict . TLE.decodeUtf8With E.lenientDecode
|
||||
|
||||
|
||||
instance MonadBaseControl b m => MonadBaseControl b (Excepts e m) where
|
||||
type StM (Excepts e m) a = ComposeSt (Excepts e) m a
|
||||
liftBaseWith = defaultLiftBaseWith
|
||||
restoreM = defaultRestoreM
|
||||
{-# INLINABLE liftBaseWith #-}
|
||||
{-# INLINABLE restoreM #-}
|
||||
|
||||
instance MonadTransControl (Excepts e) where
|
||||
type StT (Excepts e) a = VEither e a
|
||||
liftWith f = veitherMToExcepts <$> liftM return $ f $ runE
|
||||
restoreT = veitherMToExcepts
|
||||
{-# INLINABLE liftWith #-}
|
||||
{-# INLINABLE restoreT #-}
|
||||
|
||||
instance MonadBase b m => MonadBase b (Excepts e m) where
|
||||
liftBase = liftBaseDefault
|
||||
{-# INLINABLE liftBase #-}
|
||||
|
||||
instance MonadBaseControl (VEither e) (VEither e) where
|
||||
type StM (VEither e) a = a
|
||||
liftBaseWith f = f id
|
||||
restoreM = return
|
||||
{-# INLINABLE liftBaseWith #-}
|
||||
{-# INLINABLE restoreM #-}
|
||||
|
||||
instance MonadBase (VEither e) (VEither e) where
|
||||
liftBase = id
|
||||
{-# INLINABLE liftBase #-}
|
||||
|
||||
|
||||
veitherMToExcepts :: Monad m => m (VEither es a) -> Excepts es m a
|
||||
veitherMToExcepts ma = do
|
||||
ve <- lift ma
|
||||
veitherToExcepts ve
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user