b1a6d88845
We've previously used functions in the Router type to provide information for subrouters. But this accesses the Requests too early, and breaks sharing of the router structure in general, causing the Router or large parts of the Router to be recomputed on every request. We now do not use functions anymore, and properly compute all static parts of the router first, and gain access to the request only in Delayed. This also turns the code used within Delayed into a proper monad now called DelayedIO, making some of the code using it a bit nicer.
633 lines
23 KiB
Haskell
633 lines
23 KiB
Haskell
{-# 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 FlexibleInstances #-}
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{-# LANGUAGE FlexibleInstances #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE PolyKinds #-}
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{-# LANGUAGE ScopedTypeVariables #-}
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{-# LANGUAGE TypeFamilies #-}
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{-# LANGUAGE TypeOperators #-}
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{-# LANGUAGE TypeSynonymInstances #-}
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module Servant.ServerSpec where
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import Control.Monad (forM_, when, unless)
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import Control.Monad.Trans.Except (throwE)
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import Data.Aeson (FromJSON, ToJSON, decode', encode)
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import qualified Data.ByteString.Base64 as Base64
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import Data.ByteString.Conversion ()
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import Data.Char (toUpper)
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import Data.Monoid
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import Data.Proxy (Proxy (Proxy))
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import Data.String (fromString)
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import Data.String.Conversions (cs)
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import qualified Data.Text as T
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import GHC.Generics (Generic)
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import Network.HTTP.Types (Status (..), hAccept, hContentType,
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methodDelete, methodGet,
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methodHead, methodPatch,
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methodPost, methodPut, ok200,
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imATeaPot418,
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parseQuery)
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import Network.Wai (Application, Request, requestHeaders, pathInfo,
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queryString, rawQueryString,
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responseLBS)
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import Network.Wai.Test (defaultRequest, request,
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runSession, simpleBody,
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simpleHeaders, simpleStatus)
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import Servant.API ((:<|>) (..), (:>), AuthProtect,
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BasicAuth, BasicAuthData(BasicAuthData),
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Capture, Delete, Get, Header (..),
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Headers, HttpVersion,
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IsSecure (..), JSON,
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NoContent (..), Patch, PlainText,
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Post, Put,
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QueryFlag, QueryParam, QueryParams,
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Raw, RemoteHost, ReqBody,
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StdMethod (..), Verb, addHeader)
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import Servant.API.Internal.Test.ComprehensiveAPI
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import Servant.Server (Server, Handler, err401, err403,
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err404, serve, serveWithContext,
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Context((:.), EmptyContext))
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import Test.Hspec (Spec, context, describe, it,
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shouldBe, shouldContain)
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import qualified Test.Hspec.Wai as THW
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import Test.Hspec.Wai (get, liftIO, matchHeaders,
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matchStatus, shouldRespondWith,
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with, (<:>))
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import Servant.Server.Internal.BasicAuth (BasicAuthCheck(BasicAuthCheck),
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BasicAuthResult(Authorized,Unauthorized))
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import Servant.Server.Experimental.Auth
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(AuthHandler, AuthServerData,
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mkAuthHandler)
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import Servant.Server.Internal.Context
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(NamedContext(..))
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-- * comprehensive api test
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-- This declaration simply checks that all instances are in place.
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_ = serveWithContext comprehensiveAPI comprehensiveApiContext
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comprehensiveApiContext :: Context '[NamedContext "foo" '[]]
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comprehensiveApiContext = NamedContext EmptyContext :. EmptyContext
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-- * Specs
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spec :: Spec
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spec = do
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verbSpec
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captureSpec
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queryParamSpec
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reqBodySpec
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headerSpec
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rawSpec
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alternativeSpec
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responseHeadersSpec
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miscCombinatorSpec
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basicAuthSpec
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genAuthSpec
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------------------------------------------------------------------------------
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-- * verbSpec {{{
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------------------------------------------------------------------------------
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type VerbApi method status
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= Verb method status '[JSON] Person
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:<|> "noContent" :> Verb method status '[JSON] NoContent
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:<|> "header" :> Verb method status '[JSON] (Headers '[Header "H" Int] Person)
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:<|> "headerNC" :> Verb method status '[JSON] (Headers '[Header "H" Int] NoContent)
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verbSpec :: Spec
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verbSpec = describe "Servant.API.Verb" $ do
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let server :: Server (VerbApi method status)
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server = return alice
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:<|> return NoContent
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:<|> return (addHeader 5 alice)
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:<|> return (addHeader 10 NoContent)
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get200 = Proxy :: Proxy (VerbApi 'GET 200)
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post210 = Proxy :: Proxy (VerbApi 'POST 210)
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put203 = Proxy :: Proxy (VerbApi 'PUT 203)
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delete280 = Proxy :: Proxy (VerbApi 'DELETE 280)
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patch214 = Proxy :: Proxy (VerbApi 'PATCH 214)
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wrongMethod m = if m == methodPatch then methodPost else methodPatch
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test desc api method (status :: Int) = context desc $
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with (return $ serve api server) $ do
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-- HEAD and 214/215 need not return bodies
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unless (status `elem` [214, 215] || method == methodHead) $
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it "returns the person" $ do
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response <- THW.request method "/" [] ""
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liftIO $ statusCode (simpleStatus response) `shouldBe` status
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liftIO $ decode' (simpleBody response) `shouldBe` Just alice
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it "returns no content on NoContent" $ do
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response <- THW.request method "/noContent" [] ""
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liftIO $ statusCode (simpleStatus response) `shouldBe` status
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liftIO $ simpleBody response `shouldBe` ""
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-- HEAD should not return body
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when (method == methodHead) $
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it "HEAD returns no content body" $ do
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response <- THW.request method "/" [] ""
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liftIO $ simpleBody response `shouldBe` ""
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it "throws 405 on wrong method " $ do
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THW.request (wrongMethod method) "/" [] ""
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`shouldRespondWith` 405
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it "returns headers" $ do
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response1 <- THW.request method "/header" [] ""
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liftIO $ statusCode (simpleStatus response1) `shouldBe` status
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liftIO $ simpleHeaders response1 `shouldContain` [("H", "5")]
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response2 <- THW.request method "/header" [] ""
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liftIO $ statusCode (simpleStatus response2) `shouldBe` status
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liftIO $ simpleHeaders response2 `shouldContain` [("H", "5")]
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it "handles trailing '/' gracefully" $ do
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response <- THW.request method "/headerNC/" [] ""
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liftIO $ statusCode (simpleStatus response) `shouldBe` status
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it "returns 406 if the Accept header is not supported" $ do
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THW.request method "" [(hAccept, "crazy/mime")] ""
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`shouldRespondWith` 406
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it "responds if the Accept header is supported" $ do
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response <- THW.request method ""
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[(hAccept, "application/json")] ""
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liftIO $ statusCode (simpleStatus response) `shouldBe` status
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it "sets the Content-Type header" $ do
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response <- THW.request method "" [] ""
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liftIO $ simpleHeaders response `shouldContain`
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[("Content-Type", "application/json")]
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test "GET 200" get200 methodGet 200
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test "POST 210" post210 methodPost 210
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test "PUT 203" put203 methodPut 203
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test "DELETE 280" delete280 methodDelete 280
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test "PATCH 214" patch214 methodPatch 214
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test "GET 200 with HEAD" get200 methodHead 200
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-- }}}
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------------------------------------------------------------------------------
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-- * captureSpec {{{
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------------------------------------------------------------------------------
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type CaptureApi = Capture "legs" Integer :> Get '[JSON] Animal
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captureApi :: Proxy CaptureApi
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captureApi = Proxy
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captureServer :: Integer -> Handler Animal
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captureServer legs = case legs of
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4 -> return jerry
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2 -> return tweety
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_ -> throwE err404
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captureSpec :: Spec
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captureSpec = do
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describe "Servant.API.Capture" $ do
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with (return (serve captureApi captureServer)) $ do
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it "can capture parts of the 'pathInfo'" $ do
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response <- get "/2"
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liftIO $ decode' (simpleBody response) `shouldBe` Just tweety
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it "returns 400 if the decoding fails" $ do
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get "/notAnInt" `shouldRespondWith` 400
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with (return (serve
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(Proxy :: Proxy (Capture "captured" String :> Raw))
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(\ "captured" request_ respond ->
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respond $ responseLBS ok200 [] (cs $ show $ pathInfo request_)))) $ do
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it "strips the captured path snippet from pathInfo" $ do
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get "/captured/foo" `shouldRespondWith` (fromString (show ["foo" :: String]))
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-- }}}
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------------------------------------------------------------------------------
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-- * queryParamSpec {{{
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------------------------------------------------------------------------------
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type QueryParamApi = QueryParam "name" String :> Get '[JSON] Person
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:<|> "a" :> QueryParams "names" String :> Get '[JSON] Person
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:<|> "b" :> QueryFlag "capitalize" :> Get '[JSON] Person
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queryParamApi :: Proxy QueryParamApi
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queryParamApi = Proxy
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qpServer :: Server QueryParamApi
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qpServer = queryParamServer :<|> qpNames :<|> qpCapitalize
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where qpNames (_:name2:_) = return alice { name = name2 }
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qpNames _ = return alice
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qpCapitalize False = return alice
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qpCapitalize True = return alice { name = map toUpper (name alice) }
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queryParamServer (Just name_) = return alice{name = name_}
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queryParamServer Nothing = return alice
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queryParamSpec :: Spec
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queryParamSpec = do
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describe "Servant.API.QueryParam" $ do
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it "allows retrieving simple GET parameters" $
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(flip runSession) (serve queryParamApi qpServer) $ do
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let params1 = "?name=bob"
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response1 <- Network.Wai.Test.request defaultRequest{
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rawQueryString = params1,
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queryString = parseQuery params1
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}
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liftIO $ do
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decode' (simpleBody response1) `shouldBe` Just alice{
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name = "bob"
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}
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it "allows retrieving lists in GET parameters" $
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(flip runSession) (serve queryParamApi qpServer) $ do
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let params2 = "?names[]=bob&names[]=john"
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response2 <- Network.Wai.Test.request defaultRequest{
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rawQueryString = params2,
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queryString = parseQuery params2,
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pathInfo = ["a"]
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}
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liftIO $
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decode' (simpleBody response2) `shouldBe` Just alice{
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name = "john"
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}
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it "allows retrieving value-less GET parameters" $
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(flip runSession) (serve queryParamApi qpServer) $ do
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let params3 = "?capitalize"
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response3 <- Network.Wai.Test.request defaultRequest{
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rawQueryString = params3,
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queryString = parseQuery params3,
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pathInfo = ["b"]
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}
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liftIO $
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decode' (simpleBody response3) `shouldBe` Just alice{
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name = "ALICE"
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}
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let params3' = "?capitalize="
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response3' <- Network.Wai.Test.request defaultRequest{
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rawQueryString = params3',
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queryString = parseQuery params3',
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pathInfo = ["b"]
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}
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liftIO $
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decode' (simpleBody response3') `shouldBe` Just alice{
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name = "ALICE"
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}
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let params3'' = "?unknown="
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response3'' <- Network.Wai.Test.request defaultRequest{
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rawQueryString = params3'',
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queryString = parseQuery params3'',
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pathInfo = ["b"]
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}
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liftIO $
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decode' (simpleBody response3'') `shouldBe` Just alice{
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name = "Alice"
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}
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-- }}}
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------------------------------------------------------------------------------
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-- * reqBodySpec {{{
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------------------------------------------------------------------------------
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type ReqBodyApi = ReqBody '[JSON] Person :> Post '[JSON] Person
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:<|> "blah" :> ReqBody '[JSON] Person :> Put '[JSON] Integer
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reqBodyApi :: Proxy ReqBodyApi
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reqBodyApi = Proxy
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reqBodySpec :: Spec
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reqBodySpec = describe "Servant.API.ReqBody" $ do
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let server :: Server ReqBodyApi
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server = return :<|> return . age
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mkReq method x = THW.request method x
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[(hContentType, "application/json;charset=utf-8")]
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with (return $ serve reqBodyApi server) $ do
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it "passes the argument to the handler" $ do
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response <- mkReq methodPost "" (encode alice)
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liftIO $ decode' (simpleBody response) `shouldBe` Just alice
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it "rejects invalid request bodies with status 400" $ do
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mkReq methodPut "/blah" "some invalid body" `shouldRespondWith` 400
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it "responds with 415 if the request body media type is unsupported" $ do
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THW.request methodPost "/"
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[(hContentType, "application/nonsense")] "" `shouldRespondWith` 415
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-- }}}
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------------------------------------------------------------------------------
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-- * headerSpec {{{
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------------------------------------------------------------------------------
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type HeaderApi a = Header "MyHeader" a :> Delete '[JSON] ()
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headerApi :: Proxy (HeaderApi a)
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headerApi = Proxy
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headerSpec :: Spec
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headerSpec = describe "Servant.API.Header" $ do
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let expectsInt :: Maybe Int -> Handler ()
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expectsInt (Just x) = when (x /= 5) $ error "Expected 5"
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expectsInt Nothing = error "Expected an int"
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let expectsString :: Maybe String -> Handler ()
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expectsString (Just x) = when (x /= "more from you") $ error "Expected more from you"
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expectsString Nothing = error "Expected a string"
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with (return (serve headerApi expectsInt)) $ do
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let delete' x = THW.request methodDelete x [("MyHeader", "5")]
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it "passes the header to the handler (Int)" $
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delete' "/" "" `shouldRespondWith` 200
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with (return (serve headerApi expectsString)) $ do
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let delete' x = THW.request methodDelete x [("MyHeader", "more from you")]
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it "passes the header to the handler (String)" $
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delete' "/" "" `shouldRespondWith` 200
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-- }}}
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------------------------------------------------------------------------------
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-- * rawSpec {{{
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------------------------------------------------------------------------------
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type RawApi = "foo" :> Raw
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rawApi :: Proxy RawApi
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rawApi = Proxy
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rawApplication :: Show a => (Request -> a) -> Application
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rawApplication f request_ respond = respond $ responseLBS ok200 []
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(cs $ show $ f request_)
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rawSpec :: Spec
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rawSpec = do
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describe "Servant.API.Raw" $ do
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it "runs applications" $ do
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(flip runSession) (serve rawApi (rawApplication (const (42 :: Integer)))) $ do
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response <- Network.Wai.Test.request defaultRequest{
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pathInfo = ["foo"]
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}
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liftIO $ do
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simpleBody response `shouldBe` "42"
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it "gets the pathInfo modified" $ do
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(flip runSession) (serve rawApi (rawApplication pathInfo)) $ do
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response <- Network.Wai.Test.request defaultRequest{
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pathInfo = ["foo", "bar"]
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}
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liftIO $ do
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simpleBody response `shouldBe` cs (show ["bar" :: String])
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-- }}}
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------------------------------------------------------------------------------
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-- * alternativeSpec {{{
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------------------------------------------------------------------------------
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type AlternativeApi =
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"foo" :> Get '[JSON] Person
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:<|> "bar" :> Get '[JSON] Animal
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:<|> "foo" :> Get '[PlainText] T.Text
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:<|> "bar" :> Post '[JSON] Animal
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:<|> "bar" :> Put '[JSON] Animal
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:<|> "bar" :> Delete '[JSON] ()
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alternativeApi :: Proxy AlternativeApi
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alternativeApi = Proxy
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alternativeServer :: Server AlternativeApi
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alternativeServer =
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return alice
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:<|> return jerry
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:<|> return "a string"
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:<|> return jerry
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:<|> return jerry
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:<|> return ()
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alternativeSpec :: Spec
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alternativeSpec = do
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describe "Servant.API.Alternative" $ do
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with (return $ serve alternativeApi alternativeServer) $ do
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it "unions endpoints" $ do
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response <- get "/foo"
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liftIO $ do
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decode' (simpleBody response) `shouldBe`
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Just alice
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response_ <- get "/bar"
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liftIO $ do
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decode' (simpleBody response_) `shouldBe`
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Just jerry
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it "checks all endpoints before returning 415" $ do
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get "/foo" `shouldRespondWith` 200
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it "returns 404 if the path does not exist" $ do
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get "/nonexistent" `shouldRespondWith` 404
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-- }}}
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------------------------------------------------------------------------------
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-- * responseHeaderSpec {{{
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------------------------------------------------------------------------------
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type ResponseHeadersApi =
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Get '[JSON] (Headers '[Header "H1" Int, Header "H2" String] String)
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:<|> Post '[JSON] (Headers '[Header "H1" Int, Header "H2" String] String)
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:<|> Put '[JSON] (Headers '[Header "H1" Int, Header "H2" String] String)
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:<|> Patch '[JSON] (Headers '[Header "H1" Int, Header "H2" String] String)
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responseHeadersServer :: Server ResponseHeadersApi
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responseHeadersServer = let h = return $ addHeader 5 $ addHeader "kilroy" "hi"
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in h :<|> h :<|> h :<|> h
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responseHeadersSpec :: Spec
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responseHeadersSpec = describe "ResponseHeaders" $ do
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with (return $ serve (Proxy :: Proxy ResponseHeadersApi) responseHeadersServer) $ do
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let methods = [methodGet, methodPost, methodPut, methodPatch]
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it "includes the headers in the response" $
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forM_ methods $ \method ->
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THW.request method "/" [] ""
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`shouldRespondWith` "\"hi\""{ matchHeaders = ["H1" <:> "5", "H2" <:> "kilroy"]
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, matchStatus = 200
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}
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it "responds with not found for non-existent endpoints" $
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forM_ methods $ \method ->
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THW.request method "blahblah" [] ""
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`shouldRespondWith` 404
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it "returns 406 if the Accept header is not supported" $
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forM_ methods $ \method ->
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THW.request method "" [(hAccept, "crazy/mime")] ""
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`shouldRespondWith` 406
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-- }}}
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------------------------------------------------------------------------------
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-- * miscCombinatorSpec {{{
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------------------------------------------------------------------------------
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type MiscCombinatorsAPI
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= "version" :> HttpVersion :> Get '[JSON] String
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:<|> "secure" :> IsSecure :> Get '[JSON] String
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:<|> "host" :> RemoteHost :> Get '[JSON] String
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miscApi :: Proxy MiscCombinatorsAPI
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miscApi = Proxy
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miscServ :: Server MiscCombinatorsAPI
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miscServ = versionHandler
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:<|> secureHandler
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:<|> hostHandler
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where versionHandler = return . show
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secureHandler Secure = return "secure"
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secureHandler NotSecure = return "not secure"
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hostHandler = return . show
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miscCombinatorSpec :: Spec
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miscCombinatorSpec = with (return $ serve miscApi miscServ) $
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describe "Misc. combinators for request inspection" $ do
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it "Successfully gets the HTTP version specified in the request" $
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go "/version" "\"HTTP/1.0\""
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it "Checks that hspec-wai uses HTTP, not HTTPS" $
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go "/secure" "\"not secure\""
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it "Checks that hspec-wai issues request from 0.0.0.0" $
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go "/host" "\"0.0.0.0:0\""
|
|
|
|
where go path res = Test.Hspec.Wai.get path `shouldRespondWith` res
|
|
|
|
-- }}}
|
|
------------------------------------------------------------------------------
|
|
-- * Basic Authentication {{{
|
|
------------------------------------------------------------------------------
|
|
|
|
type BasicAuthAPI =
|
|
BasicAuth "foo" () :> "basic" :> Get '[JSON] Animal
|
|
:<|> Raw
|
|
|
|
basicAuthApi :: Proxy BasicAuthAPI
|
|
basicAuthApi = Proxy
|
|
|
|
basicAuthServer :: Server BasicAuthAPI
|
|
basicAuthServer =
|
|
const (return jerry) :<|>
|
|
(\ _ respond -> respond $ responseLBS imATeaPot418 [] "")
|
|
|
|
basicAuthContext :: Context '[ BasicAuthCheck () ]
|
|
basicAuthContext =
|
|
let basicHandler = BasicAuthCheck $ \(BasicAuthData usr pass) ->
|
|
if usr == "servant" && pass == "server"
|
|
then return (Authorized ())
|
|
else return Unauthorized
|
|
in basicHandler :. EmptyContext
|
|
|
|
basicAuthSpec :: Spec
|
|
basicAuthSpec = do
|
|
describe "Servant.API.BasicAuth" $ do
|
|
with (return (serveWithContext basicAuthApi basicAuthContext basicAuthServer)) $ do
|
|
|
|
context "Basic Authentication" $ do
|
|
let basicAuthHeaders user password =
|
|
[("Authorization", "Basic " <> Base64.encode (user <> ":" <> password))]
|
|
it "returns 401 when no credentials given" $ do
|
|
get "/basic" `shouldRespondWith` 401
|
|
|
|
it "returns 403 when invalid credentials given" $ do
|
|
THW.request methodGet "/basic" (basicAuthHeaders "servant" "wrong") ""
|
|
`shouldRespondWith` 403
|
|
|
|
it "returns 200 with the right password" $ do
|
|
THW.request methodGet "/basic" (basicAuthHeaders "servant" "server") ""
|
|
`shouldRespondWith` 200
|
|
|
|
it "plays nice with subsequent Raw endpoints" $ do
|
|
get "/foo" `shouldRespondWith` 418
|
|
|
|
-- }}}
|
|
------------------------------------------------------------------------------
|
|
-- * General Authentication {{{
|
|
------------------------------------------------------------------------------
|
|
|
|
type GenAuthAPI = AuthProtect "auth" :> "auth" :> Get '[JSON] Animal
|
|
:<|> Raw
|
|
|
|
genAuthApi :: Proxy GenAuthAPI
|
|
genAuthApi = Proxy
|
|
|
|
genAuthServer :: Server GenAuthAPI
|
|
genAuthServer = const (return tweety)
|
|
:<|> (\ _ respond -> respond $ responseLBS imATeaPot418 [] "")
|
|
|
|
type instance AuthServerData (AuthProtect "auth") = ()
|
|
|
|
genAuthContext :: Context '[AuthHandler Request ()]
|
|
genAuthContext =
|
|
let authHandler = \req -> case lookup "Auth" (requestHeaders req) of
|
|
Just "secret" -> return ()
|
|
Just _ -> throwE err403
|
|
Nothing -> throwE err401
|
|
in mkAuthHandler authHandler :. EmptyContext
|
|
|
|
genAuthSpec :: Spec
|
|
genAuthSpec = do
|
|
describe "Servant.API.Auth" $ do
|
|
with (return (serveWithContext genAuthApi genAuthContext genAuthServer)) $ do
|
|
|
|
context "Custom Auth Protection" $ do
|
|
it "returns 401 when missing headers" $ do
|
|
get "/auth" `shouldRespondWith` 401
|
|
|
|
it "returns 403 on wrong passwords" $ do
|
|
THW.request methodGet "/auth" [("Auth","wrong")] "" `shouldRespondWith` 403
|
|
|
|
it "returns 200 with the right header" $ do
|
|
THW.request methodGet "/auth" [("Auth","secret")] "" `shouldRespondWith` 200
|
|
|
|
it "plays nice with subsequent Raw endpoints" $ do
|
|
get "/foo" `shouldRespondWith` 418
|
|
|
|
-- }}}
|
|
------------------------------------------------------------------------------
|
|
-- * Test data types {{{
|
|
------------------------------------------------------------------------------
|
|
|
|
data Person = Person {
|
|
name :: String,
|
|
age :: Integer
|
|
}
|
|
deriving (Eq, Show, Generic)
|
|
|
|
instance ToJSON Person
|
|
instance FromJSON Person
|
|
|
|
alice :: Person
|
|
alice = Person "Alice" 42
|
|
|
|
data Animal = Animal {
|
|
species :: String,
|
|
numberOfLegs :: Integer
|
|
}
|
|
deriving (Eq, Show, Generic)
|
|
|
|
instance ToJSON Animal
|
|
instance FromJSON Animal
|
|
|
|
jerry :: Animal
|
|
jerry = Animal "Mouse" 4
|
|
|
|
tweety :: Animal
|
|
tweety = Animal "Bird" 2
|
|
-- }}}
|