662 lines
24 KiB
Haskell
662 lines
24 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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#if !MIN_VERSION_base(4,8,0)
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import Control.Applicative ((<$>))
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#endif
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import Control.Monad (forM_, when, unless)
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import Control.Monad.Trans.Except (ExceptT, 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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responseBuilder, responseLBS)
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import Network.Wai.Internal (Response (ResponseBuilder))
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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 (ServantErr (..), Server, err401, err404,
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serve, serveWithContext, 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.RoutingApplication
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(toApplication, RouteResult(..))
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import Servant.Server.Internal.Router
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(tweakResponse, runRouter,
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Router, Router'(LeafRouter))
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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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routerSpec
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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 -> ExceptT ServantErr IO 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 -> ExceptT ServantErr IO ()
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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 -> ExceptT ServantErr IO ()
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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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-- * routerSpec {{{
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------------------------------------------------------------------------------
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routerSpec :: Spec
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routerSpec = do
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describe "Servant.Server.Internal.Router" $ do
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let app' :: Application
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app' = toApplication $ runRouter router'
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router', router :: Router
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router' = tweakResponse (twk <$>) router
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router = LeafRouter $ \_ cont -> cont (Route $ responseBuilder (Status 201 "") [] "")
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twk :: Response -> Response
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twk (ResponseBuilder (Status i s) hs b) = ResponseBuilder (Status (i + 1) s) hs b
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twk b = b
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describe "tweakResponse" . with (return app') $ do
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it "calls f on route result" $ do
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get "" `shouldRespondWith` 202
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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
|
|
|
|
miscApi :: Proxy MiscCombinatorsAPI
|
|
miscApi = Proxy
|
|
|
|
miscServ :: Server MiscCombinatorsAPI
|
|
miscServ = versionHandler
|
|
:<|> secureHandler
|
|
:<|> hostHandler
|
|
|
|
where versionHandler = return . show
|
|
secureHandler Secure = return "secure"
|
|
secureHandler NotSecure = return "not secure"
|
|
hostHandler = return . show
|
|
|
|
miscCombinatorSpec :: Spec
|
|
miscCombinatorSpec = with (return $ serve miscApi miscServ) $
|
|
describe "Misc. combinators for request inspection" $ do
|
|
it "Successfully gets the HTTP version specified in the request" $
|
|
go "/version" "\"HTTP/1.0\""
|
|
|
|
it "Checks that hspec-wai uses HTTP, not HTTPS" $
|
|
go "/secure" "\"not secure\""
|
|
|
|
it "Checks that hspec-wai issues request from 0.0.0.0" $
|
|
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 ->
|
|
if elem ("Auth", "secret") (requestHeaders req)
|
|
then return ()
|
|
else 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 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
|
|
-- }}}
|