111 lines
3.9 KiB
Haskell
111 lines
3.9 KiB
Haskell
{-# LANGUAGE CPP #-}
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{-# LANGUAGE ConstraintKinds #-}
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{-# LANGUAGE DataKinds #-}
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{-# LANGUAGE DeriveGeneric #-}
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{-# LANGUAGE FlexibleContexts #-}
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{-# LANGUAGE FlexibleInstances #-}
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{-# LANGUAGE FunctionalDependencies #-}
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{-# LANGUAGE GADTs #-}
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{-# LANGUAGE MultiParamTypeClasses #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE PolyKinds #-}
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{-# LANGUAGE RecordWildCards #-}
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{-# LANGUAGE ScopedTypeVariables #-}
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{-# LANGUAGE StandaloneDeriving #-}
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{-# LANGUAGE TypeFamilies #-}
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{-# LANGUAGE TypeOperators #-}
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{-# LANGUAGE UndecidableInstances #-}
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{-# OPTIONS_GHC -freduction-depth=100 #-}
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{-# OPTIONS_GHC -fno-warn-orphans #-}
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{-# OPTIONS_GHC -fno-warn-name-shadowing #-}
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module Servant.StreamSpec (spec) where
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import Control.Monad.Trans.Except
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import qualified Data.ByteString as BS
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import Data.Proxy
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import Prelude ()
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import Prelude.Compat
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import Servant.API
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((:<|>) ((:<|>)), (:>), JSON, NetstringFraming,
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NewlineFraming, NoFraming, OctetStream, SourceIO, StreamBody,
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StreamGet)
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import Servant.ClientSpec
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(Person (..))
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import qualified Servant.ClientSpec as CS
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import Servant.HttpStreams
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import Servant.Server
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import Servant.Types.SourceT
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import System.Entropy
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(getEntropy, getHardwareEntropy)
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import Test.Hspec
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spec :: Spec
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spec = describe "Servant.HttpStreams streaming" $ do
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streamSpec
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type StreamApi =
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"streamGetNewline" :> StreamGet NewlineFraming JSON (SourceIO Person)
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:<|> "streamGetNetstring" :> StreamGet NetstringFraming JSON (SourceIO Person)
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:<|> "streamALot" :> StreamGet NoFraming OctetStream (SourceIO BS.ByteString)
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:<|> "streamBody" :> StreamBody NoFraming OctetStream (SourceIO BS.ByteString) :> StreamGet NoFraming OctetStream (SourceIO BS.ByteString)
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api :: Proxy StreamApi
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api = Proxy
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getGetNL, getGetNS :: ClientM (SourceIO Person)
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_getGetALot :: ClientM (SourceIO BS.ByteString)
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getStreamBody :: SourceT IO BS.ByteString -> ClientM (SourceIO BS.ByteString)
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getGetNL :<|> getGetNS :<|> _getGetALot :<|> getStreamBody = client api
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alice :: Person
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alice = Person "Alice" 42
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bob :: Person
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bob = Person "Bob" 25
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server :: Application
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server = serve api
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$ return (source [alice, bob, alice])
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:<|> return (source [alice, bob, alice])
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-- 2 ^ (18 + 10) = 256M
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:<|> return (SourceT ($ lots (powerOfTwo 18)))
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:<|> return
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where
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lots n
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| n < 0 = Stop
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| otherwise = Effect $ do
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let size = powerOfTwo 10
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mbs <- getHardwareEntropy size
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bs <- maybe (getEntropy size) pure mbs
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return (Yield bs (lots (n - 1)))
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powerOfTwo :: Int -> Int
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powerOfTwo = (2 ^)
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withClient :: ClientM a -> BaseUrl -> (Either ServantError a -> IO r) -> IO r
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withClient x burl k = do
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withClientEnvIO burl $ \env -> withClientM x env k
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testRunSourceIO :: SourceIO a
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-> IO (Either String [a])
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testRunSourceIO = runExceptT . runSourceT
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streamSpec :: Spec
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streamSpec = beforeAll (CS.startWaiApp server) $ afterAll CS.endWaiApp $ do
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it "works with Servant.API.StreamGet.Newline" $ \(_, baseUrl) -> do
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withClient getGetNL baseUrl $ \(Right res) ->
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testRunSourceIO res `shouldReturn` Right [alice, bob, alice]
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it "works with Servant.API.StreamGet.Netstring" $ \(_, baseUrl) -> do
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withClient getGetNS baseUrl $ \(Right res) ->
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testRunSourceIO res `shouldReturn` Right [alice, bob, alice]
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it "works with Servant.API.StreamBody" $ \(_, baseUrl) -> do
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withClient (getStreamBody (source input)) baseUrl $ \(Right res) ->
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testRunSourceIO res `shouldReturn` Right output
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where
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input = ["foo", "", "bar"]
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output = ["foo", "bar"]
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