Refactor RouteResult.

Fix rerouting tests
        Fix 405 > 404 issue with Capture.
        Remove ServantErrWithPriority and Monoid instance
        More tests
        Update auth-combinator for routing changes
This commit is contained in:
Julian K. Arni 2015-09-09 23:49:19 -07:00
parent 153de01a62
commit a3b5652ab9
9 changed files with 165 additions and 176 deletions

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@ -5,6 +5,7 @@
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE TypeOperators #-}
import Data.Aeson
import Data.ByteString (ByteString)
import Data.Text (Text)
@ -31,12 +32,12 @@ instance HasServer rest => HasServer (AuthProtected :> rest) where
route Proxy a = WithRequest $ \ request ->
route (Proxy :: Proxy rest) $ do
case lookup "Cookie" (requestHeaders request) of
Nothing -> return $ failWith $ HttpError status401 (Just "Missing auth header.")
Nothing -> return $! failFatallyWith err401 { errBody = "Missing auth header" }
Just v -> do
authGranted <- isGoodCookie v
if authGranted
then a
else return $ failWith $ HttpError status403 (Just "Invalid cookie.")
else return $! failFatallyWith err403 { errBody = "Invalid cookie" }
type PrivateAPI = Get '[JSON] [PrivateData]

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@ -103,7 +103,7 @@ import Servant.Server.Internal.Enter
-- > main = Network.Wai.Handler.Warp.run 8080 app
--
serve :: HasServer layout => Proxy layout -> Server layout -> Application
serve p server = toApplication (runRouter (route p (return (RR (Right server)))))
serve p server = toApplication (runRouter (route p (return (HandlerVal server))))
-- Documentation

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@ -113,11 +113,10 @@ instance (KnownSymbol capture, FromHttpApiData a, HasServer sublayout)
a -> ServerT sublayout m
route Proxy subserver =
DynamicRouter $ \ first ->
route (Proxy :: Proxy sublayout)
(case captured captureProxy first of
Nothing -> return $ failWith NotFound
Just v -> feedTo subserver v)
DynamicRouter $ \ first -> case captured captureProxy first of
Nothing -> LeafRouter (\_ r -> r $ failWith err404)
Just v -> route (Proxy :: Proxy sublayout) (feedTo subserver v)
where captureProxy = Proxy :: Proxy (Capture capture a)
allowedMethodHead :: Method -> Request -> Bool
@ -131,7 +130,7 @@ processMethodRouter :: forall a. ConvertibleStrings a B.ByteString
-> Maybe [(HeaderName, B.ByteString)]
-> Request -> RouteResult Response
processMethodRouter handleA status method headers request = case handleA of
Nothing -> failWith UnsupportedMediaType
Nothing -> failFatallyWith err406
Just (contentT, body) -> succeedWith $ responseLBS status hdrs bdy
where
bdy = if allowedMethodHead method request then "" else body
@ -150,8 +149,8 @@ methodRouter method proxy status action = LeafRouter route'
handleA = handleAcceptH proxy (AcceptHeader accH) output
processMethodRouter handleA status method Nothing request
| pathIsEmpty request && requestMethod request /= method =
respond $ failWith WrongMethod
| otherwise = respond $ failWith NotFound
respond $ failWith err405
| otherwise = respond $ failWith err404
methodRouterHeaders :: (GetHeaders (Headers h v), AllCTRender ctypes v)
=> Method -> Proxy ctypes -> Status
@ -167,8 +166,8 @@ methodRouterHeaders method proxy status action = LeafRouter route'
handleA = handleAcceptH proxy (AcceptHeader accH) (getResponse output)
processMethodRouter handleA status method (Just headers) request
| pathIsEmpty request && requestMethod request /= method =
respond $ failWith WrongMethod
| otherwise = respond $ failWith NotFound
respond $ failWith err405
| otherwise = respond $ failWith err404
methodRouterEmpty :: Method
-> IO (RouteResult (ExceptT ServantErr IO ()))
@ -180,8 +179,8 @@ methodRouterEmpty method action = LeafRouter route'
runAction action respond $ \ () ->
succeedWith $ responseLBS noContent204 [] ""
| pathIsEmpty request && requestMethod request /= method =
respond $ failWith WrongMethod
| otherwise = respond $ failWith NotFound
respond $ failWith err405
| otherwise = respond $ failWith err404
-- | If you have a 'Delete' endpoint in your API,
-- the handler for this endpoint is meant to delete
@ -558,8 +557,9 @@ instance HasServer Raw where
route Proxy rawApplication = LeafRouter $ \ request respond -> do
r <- rawApplication
case r of
RR (Left err) -> respond $ failWith err
RR (Right app) -> app request (respond . succeedWith)
HandlerVal app -> app request (respond . succeedWith)
Retriable e -> respond $ failWith e
NonRetriable e -> respond $! failFatallyWith e
-- | If you use 'ReqBody' in one of the endpoints for your API,
-- this automatically requires your server-side handler to be a function
@ -599,8 +599,8 @@ instance ( AllCTUnrender list a, HasServer sublayout
mrqbody <- handleCTypeH (Proxy :: Proxy list) (cs contentTypeH)
<$> lazyRequestBody request
case mrqbody of
Nothing -> return $ failWith $ UnsupportedMediaType
Just (Left e) -> return $ failWith $ InvalidBody e
Nothing -> return $! failFatallyWith err415
Just (Left e) -> return $! failFatallyWith err400 { errBody = cs e }
Just (Right v) -> feedTo subserver v
-- | Make sure the incoming request starts with @"/path"@, strip it and

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@ -7,6 +7,8 @@ import qualified Data.Map as M
import Data.Monoid ((<>))
import Data.Text (Text)
import Network.Wai (Request, Response, pathInfo)
import Servant.Server.Internal.ServantErr
import Servant.Server.Internal.PathInfo
import Servant.Server.Internal.RoutingApplication
type Router = Router' RoutingApplication
@ -63,17 +65,24 @@ runRouter (StaticRouter table) request respond =
| Just router <- M.lookup first table
-> let request' = request { pathInfo = rest }
in runRouter router request' respond
_ -> respond $ failWith NotFound
_ -> respond $ failWith err404
runRouter (DynamicRouter fun) request respond =
case pathInfo request of
first : rest
-> let request' = request { pathInfo = rest }
in runRouter (fun first) request' respond
_ -> respond $ failWith NotFound
_ -> respond $ failWith err404
runRouter (LeafRouter app) request respond = app request respond
runRouter (Choice r1 r2) request respond =
runRouter r1 request $ \ mResponse1 ->
if isMismatch mResponse1
then runRouter r2 request $ \ mResponse2 ->
respond (mResponse1 <> mResponse2)
respond (highestPri mResponse1 mResponse2)
else respond mResponse1
where
highestPri (Retriable r1) (Retriable r2) =
if errHTTPCode r1 == 404 && errHTTPCode r2 /= 404
then (Retriable r2)
else (Retriable r1)
highestPri (Retriable _) y = y
highestPri x _ = x

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@ -1,4 +1,5 @@
{-# LANGUAGE CPP #-}
{-# LANGUAGE DeriveFunctor #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE TypeOperators #-}
@ -6,21 +7,17 @@ module Servant.Server.Internal.RoutingApplication where
#if !MIN_VERSION_base(4,8,0)
import Control.Applicative (Applicative, (<$>))
import Data.Monoid (Monoid, mappend, mempty)
import Data.Monoid (Monoid, mappend, mempty,
(<>))
#endif
import Control.Monad.Trans.Except (ExceptT, runExceptT)
import qualified Data.ByteString as B
import qualified Data.ByteString.Lazy as BL
import Data.IORef (newIORef, readIORef,
writeIORef)
import Data.Maybe (fromMaybe)
import Data.Monoid ((<>))
import Data.String (fromString)
import Network.HTTP.Types hiding (Header,
ResponseHeaders)
import Network.Wai (Application, Request,
Response, ResponseReceived,
requestBody, responseLBS,
requestBody,
strictRequestBody)
import Servant.API ((:<|>) (..))
import Servant.Server.Internal.ServantErr
@ -30,39 +27,12 @@ type RoutingApplication =
-> (RouteResult Response -> IO ResponseReceived) -> IO ResponseReceived
-- | A wrapper around @'Either' 'RouteMismatch' a@.
newtype RouteResult a =
RR { routeResult :: Either RouteMismatch a }
deriving (Eq, Show, Functor, Applicative)
-- | If we get a `Right`, it has precedence over everything else.
--
-- This in particular means that if we could get several 'Right's,
-- only the first we encounter would be taken into account.
instance Monoid (RouteResult a) where
mempty = RR $ Left mempty
RR (Left x) `mappend` RR (Left y) = RR $ Left (x <> y)
RR (Left _) `mappend` RR (Right y) = RR $ Right y
r `mappend` _ = r
-- Note that the ordering of the constructors has great significance! It
-- determines the Ord instance and, consequently, the monoid instance.
data RouteMismatch =
NotFound -- ^ the usual "not found" error
| WrongMethod -- ^ a more informative "you just got the HTTP method wrong" error
| UnsupportedMediaType -- ^ request body has unsupported media type
| InvalidBody String -- ^ an even more informative "your json request body wasn't valid" error
| HttpError Status (Maybe BL.ByteString) -- ^ an even even more informative arbitrary HTTP response code error.
deriving (Eq, Ord, Show)
instance Monoid RouteMismatch where
mempty = NotFound
-- The following isn't great, since it picks @InvalidBody@ based on
-- alphabetical ordering, but any choice would be arbitrary.
--
-- "As one judge said to the other, 'Be just and if you can't be just, be
-- arbitrary'" -- William Burroughs
mappend = max
data RouteResult a =
Retriable ServantErr -- ^ Keep trying other paths. The @ServantErr@
-- should only be 404 or 405.
| NonRetriable ServantErr -- ^ Stop trying.
| HandlerVal a
deriving (Eq, Show, Read, Functor)
data ReqBodyState = Uncalled
| Called !B.ByteString
@ -91,55 +61,52 @@ toApplication ra request respond = do
writeIORef reqBodyRef $ Called bs
return B.empty
ra request{ requestBody = memoReqBody } (routingRespond . routeResult)
ra request{ requestBody = memoReqBody } routingRespond
where
routingRespond :: Either RouteMismatch Response -> IO ResponseReceived
routingRespond (Left NotFound) =
respond $ responseLBS notFound404 [] "not found"
routingRespond (Left WrongMethod) =
respond $ responseLBS methodNotAllowed405 [] "method not allowed"
routingRespond (Left (InvalidBody err)) =
respond $ responseLBS badRequest400 [] $ fromString $ "invalid request body: " ++ err
routingRespond (Left UnsupportedMediaType) =
respond $ responseLBS unsupportedMediaType415 [] "unsupported media type"
routingRespond (Left (HttpError status body)) =
respond $ responseLBS status [] $ fromMaybe (BL.fromStrict $ statusMessage status) body
routingRespond (Right response) =
respond response
routingRespond :: RouteResult Response -> IO ResponseReceived
routingRespond (Retriable err) = respond $! responseServantErr err
routingRespond (NonRetriable err) = respond $! responseServantErr err
routingRespond (HandlerVal v) = respond v
runAction :: IO (RouteResult (ExceptT ServantErr IO a))
-> (RouteResult Response -> IO r)
-> (a -> RouteResult Response)
-> IO r
runAction action respond k = do
r <- action
go r
runAction action respond k = action >>= go >>= respond
where
go (RR (Right a)) = do
go (Retriable e) = return $! Retriable e
go (NonRetriable e) = return . succeedWith $! responseServantErr e
go (HandlerVal a) = do
e <- runExceptT a
respond $ case e of
Right x -> k x
Left err -> succeedWith $ responseServantErr err
go (RR (Left err)) = respond $ failWith err
case e of
Left err -> return . succeedWith $! responseServantErr err
Right x -> return $! k x
feedTo :: IO (RouteResult (a -> b)) -> a -> IO (RouteResult b)
feedTo f x = (($ x) <$>) <$> f
extractL :: RouteResult (a :<|> b) -> RouteResult a
extractL (RR (Right (a :<|> _))) = RR (Right a)
extractL (RR (Left err)) = RR (Left err)
extractL (HandlerVal (a :<|> _)) = HandlerVal a
extractL (Retriable x) = Retriable x
extractL (NonRetriable x) = NonRetriable x
extractR :: RouteResult (a :<|> b) -> RouteResult b
extractR (RR (Right (_ :<|> b))) = RR (Right b)
extractR (RR (Left err)) = RR (Left err)
extractR (HandlerVal (_ :<|> b)) = HandlerVal b
extractR (Retriable x) = Retriable x
extractR (NonRetriable x) = NonRetriable x
failWith :: RouteMismatch -> RouteResult a
failWith = RR . Left
-- | Fail with a @ServantErr@, but keep trying other paths and.
failWith :: ServantErr -> RouteResult a
failWith = Retriable
-- | Fail with immediately @ServantErr@.
failFatallyWith :: ServantErr -> RouteResult a
failFatallyWith = NonRetriable
-- | Return a value, and don't try other paths.
succeedWith :: a -> RouteResult a
succeedWith = RR . Right
succeedWith = HandlerVal
isMismatch :: RouteResult a -> Bool
isMismatch (RR (Left _)) = True
isMismatch (Retriable _) = True
isMismatch _ = False

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@ -11,7 +11,7 @@ data ServantErr = ServantErr { errHTTPCode :: Int
, errReasonPhrase :: String
, errBody :: LBS.ByteString
, errHeaders :: [HTTP.Header]
} deriving (Show, Eq)
} deriving (Show, Eq, Read)
responseServantErr :: ServantErr -> Response
responseServantErr ServantErr{..} = responseLBS status errHeaders errBody

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@ -7,9 +7,9 @@ module Servant.Server.ErrorSpec (spec) where
import Data.Aeson (encode)
import qualified Data.ByteString.Lazy.Char8 as BC
import Control.Monad.Trans.Either (left)
import Data.Proxy
import Network.HTTP.Types (methodGet, methodPost)
import Network.HTTP.Types (hAccept, hContentType, methodGet,
methodPost)
import Test.Hspec
import Test.Hspec.Wai
@ -31,8 +31,9 @@ import Servant
spec :: Spec
spec = describe "HTTP Errors" $ do
errorOrder
errorRetry
errorOrderSpec
errorRetrySpec
errorChoiceSpec
------------------------------------------------------------------------------
-- * Error Order {{{
@ -42,24 +43,24 @@ type ErrorOrderApi = "home"
:> Capture "t" Int
:> Post '[JSON] Int
errorOrderApi :: Proxy ErrorOrderApi
errorOrderApi = Proxy
errorOrderServer :: Server ErrorOrderApi
errorOrderServer = \_ _ -> left err402
errorOrderServer = \_ _ -> return 5
errorOrder :: Spec
errorOrder = describe "HTTP error order"
errorOrderSpec :: Spec
errorOrderSpec = describe "HTTP error order"
$ with (return $ serve errorOrderApi errorOrderServer) $ do
let badContentType = ("Content-Type", "text/plain")
badAccept = ("Accept", "text/plain")
let badContentType = (hContentType, "text/plain")
badAccept = (hAccept, "text/plain")
badMethod = methodGet
badUrl = "home/nonexistent"
badBody = "nonsense"
goodContentType = ("Content-Type", "application/json")
goodAccept = ("Accept", "application/json")
goodContentType = (hContentType, "application/json")
goodMethod = methodPost
goodUrl = "home/5"
goodUrl = "home/2"
goodBody = encode (5 :: Int)
it "has 404 as its highest priority error" $ do
@ -82,10 +83,6 @@ errorOrder = describe "HTTP error order"
request goodMethod goodUrl [goodContentType, badAccept] goodBody
`shouldRespondWith` 406
it "returns handler errors as its lower priority errors" $ do
request goodMethod goodUrl [goodContentType, goodAccept] goodBody
`shouldRespondWith` 402
-- }}}
------------------------------------------------------------------------------
-- * Error Retry {{{
@ -95,9 +92,10 @@ type ErrorRetryApi
:<|> "a" :> ReqBody '[PlainText] Int :> Post '[JSON] Int -- 1
:<|> "a" :> ReqBody '[JSON] Int :> Post '[PlainText] Int -- 2
:<|> "a" :> ReqBody '[JSON] String :> Post '[JSON] Int -- 3
:<|> "a" :> ReqBody '[JSON] Int :> Get '[PlainText] Int -- 4
:<|> ReqBody '[JSON] Int :> Get '[JSON] Int -- 5
:<|> "a" :> ReqBody '[JSON] Int :> Get '[JSON] Int -- 4
:<|> "a" :> ReqBody '[JSON] Int :> Get '[PlainText] Int -- 5
:<|> ReqBody '[JSON] Int :> Get '[JSON] Int -- 6
:<|> ReqBody '[JSON] Int :> Post '[JSON] Int -- 7
errorRetryApi :: Proxy ErrorRetryApi
errorRetryApi = Proxy
@ -111,19 +109,21 @@ errorRetryServer
:<|> (\_ -> return 4)
:<|> (\_ -> return 5)
:<|> (\_ -> return 6)
:<|> (\_ -> return 7)
errorRetry :: Spec
errorRetry = describe "Handler search"
errorRetrySpec :: Spec
errorRetrySpec = describe "Handler search"
$ with (return $ serve errorRetryApi errorRetryServer) $ do
let plainCT = ("Content-Type", "text/plain")
plainAccept = ("Accept", "text/plain")
jsonCT = ("Content-Type", "application/json")
jsonAccept = ("Accept", "application/json")
let plainCT = (hContentType, "text/plain")
plainAccept = (hAccept, "text/plain")
jsonCT = (hContentType, "application/json")
jsonAccept = (hAccept, "application/json")
jsonBody = encode (1797 :: Int)
it "should continue when URLs don't match" $ do
request methodPost "" [jsonCT, jsonAccept] jsonBody
`shouldRespondWith` 201 { matchBody = Just $ encode (5 :: Int) }
`shouldRespondWith` 201 { matchBody = Just $ encode (7 :: Int) }
it "should continue when methods don't match" $ do
request methodGet "a" [jsonCT, jsonAccept] jsonBody
@ -141,6 +141,50 @@ errorRetry = describe "Handler search"
request methodPost "a" [jsonCT, plainAccept] jsonBody
`shouldRespondWith` 406
-- }}}
------------------------------------------------------------------------------
-- * Error Choice {{{
type ErrorChoiceApi
= "path0" :> Get '[JSON] Int -- 0
:<|> "path1" :> Post '[JSON] Int -- 1
:<|> "path2" :> Post '[PlainText] Int -- 2
:<|> "path3" :> ReqBody '[JSON] Int :> Post '[PlainText] Int -- 3
:<|> "path4" :> (ReqBody '[PlainText] Int :> Post '[PlainText] Int -- 4
:<|> ReqBody '[PlainText] Int :> Post '[JSON] Int) -- 5
errorChoiceApi :: Proxy ErrorChoiceApi
errorChoiceApi = Proxy
errorChoiceServer :: Server ErrorChoiceApi
errorChoiceServer = return 0
:<|> return 1
:<|> return 2
:<|> (\_ -> return 3)
:<|> (\_ -> return 4)
:<|> (\_ -> return 5)
errorChoiceSpec :: Spec
errorChoiceSpec = describe "Multiple handlers return errors"
$ with (return $ serve errorChoiceApi errorChoiceServer) $ do
it "should respond with 404 if no path matches" $ do
request methodGet "" [] "" `shouldRespondWith` 404
it "should respond with 405 if a path but not method matches" $ do
request methodGet "path2" [] "" `shouldRespondWith` 405
it "should respond with the corresponding error if path and method match" $ do
request methodPost "path3" [(hContentType, "text/plain;charset=utf-8")] ""
`shouldRespondWith` 415
request methodPost "path3" [(hContentType, "application/json")] ""
`shouldRespondWith` 400
request methodPost "path4" [(hContentType, "text/plain;charset=utf-8"),
(hAccept, "application/json")] ""
`shouldRespondWith` 406
-- }}}
------------------------------------------------------------------------------
-- * Instances {{{

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@ -17,7 +17,6 @@ import Control.Monad.Trans.Except (ExceptT, throwE)
import Data.Aeson (FromJSON, ToJSON, decode', encode)
import Data.ByteString.Conversion ()
import Data.Char (toUpper)
import Data.Monoid ((<>))
import Data.Proxy (Proxy (Proxy))
import Data.String (fromString)
import Data.String.Conversions (cs)
@ -26,8 +25,7 @@ import GHC.Generics (Generic)
import Network.HTTP.Types (hAccept, hContentType,
methodDelete, methodGet, methodHead,
methodPatch, methodPost, methodPut,
ok200, parseQuery, status409,
Status(..))
ok200, parseQuery, Status(..))
import Network.Wai (Application, Request, pathInfo,
queryString, rawQueryString,
responseLBS, responseBuilder)
@ -99,7 +97,6 @@ spec = do
rawSpec
unionSpec
prioErrorsSpec
errorsSpec
routerSpec
responseHeadersSpec
miscReqCombinatorsSpec
@ -158,9 +155,9 @@ getSpec = do
it "returns 204 if the type is '()'" $ do
get "/empty" `shouldRespondWith` ""{ matchStatus = 204 }
it "returns 415 if the Accept header is not supported" $ do
it "returns 406 if the Accept header is not supported" $ do
Test.Hspec.Wai.request methodGet "" [(hAccept, "crazy/mime")] ""
`shouldRespondWith` 415
`shouldRespondWith` 406
headSpec :: Spec
@ -186,9 +183,9 @@ headSpec = do
response <- Test.Hspec.Wai.request methodHead "/empty" [] ""
return response `shouldRespondWith` ""{ matchStatus = 204 }
it "returns 415 if the Accept header is not supported" $ do
it "returns 406 if the Accept header is not supported" $ do
Test.Hspec.Wai.request methodHead "" [(hAccept, "crazy/mime")] ""
`shouldRespondWith` 415
`shouldRespondWith` 406
type QueryParamApi = QueryParam "name" String :> Get '[JSON] Person
@ -311,7 +308,7 @@ postSpec = do
it "returns 204 if the type is '()'" $ do
post' "empty" "" `shouldRespondWith` ""{ matchStatus = 204 }
it "responds with 415 if the requested media type is unsupported" $ do
it "responds with 415 if the request body media type is unsupported" $ do
let post'' x = Test.Hspec.Wai.request methodPost x [(hContentType
, "application/nonsense")]
post'' "/" "anything at all" `shouldRespondWith` 415
@ -353,7 +350,7 @@ putSpec = do
it "returns 204 if the type is '()'" $ do
put' "empty" "" `shouldRespondWith` ""{ matchStatus = 204 }
it "responds with 415 if the requested media type is unsupported" $ do
it "responds with 415 if the request body media type is unsupported" $ do
let put'' x = Test.Hspec.Wai.request methodPut x [(hContentType
, "application/nonsense")]
put'' "/" "anything at all" `shouldRespondWith` 415
@ -395,7 +392,7 @@ patchSpec = do
it "returns 204 if the type is '()'" $ do
patch' "empty" "" `shouldRespondWith` ""{ matchStatus = 204 }
it "responds with 415 if the requested media type is unsupported" $ do
it "responds with 415 if the request body media type is unsupported" $ do
let patch'' x = Test.Hspec.Wai.request methodPatch x [(hContentType
, "application/nonsense")]
patch'' "/" "anything at all" `shouldRespondWith` 415
@ -524,10 +521,10 @@ responseHeadersSpec = describe "ResponseHeaders" $ do
Test.Hspec.Wai.request method "blahblah" [] ""
`shouldRespondWith` 404
it "returns 415 if the Accept header is not supported" $
it "returns 406 if the Accept header is not supported" $
forM_ methods $ \(method,_) ->
Test.Hspec.Wai.request method "" [(hAccept, "crazy/mime")] ""
`shouldRespondWith` 415
`shouldRespondWith` 406
type PrioErrorsApi = ReqBody '[JSON] Person :> "foo" :> Get '[JSON] Integer
@ -578,50 +575,6 @@ prioErrorsSpec = describe "PrioErrors" $ do
check put' "/bar" vjson 404
check put' "/foo" vjson 405
-- | Test server error functionality.
errorsSpec :: Spec
errorsSpec = do
let he = HttpError status409 (Just "A custom error")
let ib = InvalidBody "The body is invalid"
let wm = WrongMethod
let nf = NotFound
describe "Servant.Server.Internal.RouteMismatch" $ do
it "HttpError > *" $ do
ib <> he `shouldBe` he
wm <> he `shouldBe` he
nf <> he `shouldBe` he
he <> ib `shouldBe` he
he <> wm `shouldBe` he
he <> nf `shouldBe` he
it "HE > InvalidBody > (WM,NF)" $ do
he <> ib `shouldBe` he
wm <> ib `shouldBe` ib
nf <> ib `shouldBe` ib
ib <> he `shouldBe` he
ib <> wm `shouldBe` ib
ib <> nf `shouldBe` ib
it "HE > IB > WrongMethod > NF" $ do
he <> wm `shouldBe` he
ib <> wm `shouldBe` ib
nf <> wm `shouldBe` wm
wm <> he `shouldBe` he
wm <> ib `shouldBe` ib
wm <> nf `shouldBe` wm
it "* > NotFound" $ do
he <> nf `shouldBe` he
ib <> nf `shouldBe` ib
wm <> nf `shouldBe` wm
nf <> he `shouldBe` he
nf <> ib `shouldBe` ib
nf <> wm `shouldBe` wm
routerSpec :: Spec
routerSpec = do

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@ -3,6 +3,7 @@
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE PolyKinds #-}
{-# OPTIONS_GHC -fno-warn-orphans #-}
module Servant.API.ContentTypesSpec where
@ -34,6 +35,20 @@ import Servant.API.ContentTypes
spec :: Spec
spec = describe "Servant.API.ContentTypes" $ do
describe "handleAcceptH" $ do
let p = Proxy :: Proxy '[PlainText]
it "matches any charset if none were provided" $ do
let without = handleAcceptH p (AcceptHeader "text/plain")
with = handleAcceptH p (AcceptHeader "text/plain;charset=utf-8")
wisdom = "ubi sub ubi" :: String
without wisdom `shouldBe` with wisdom
it "does not match non utf-8 charsets" $ do
let badCharset = handleAcceptH p (AcceptHeader "text/plain;charset=whoknows")
s = "cheese" :: String
badCharset s `shouldBe` Nothing
describe "The JSON Content-Type type" $ do
let p = Proxy :: Proxy JSON