如何将删除请求发送到Yesod?

时间:2018-08-14 15:13:54

标签: haskell yesod

我有一个小的JSON API,我在Yesod中构建。为了测试API,我使用cUrl。但是,以下请求返回405 method not allowed

curl -X DELETE -H "X-User-Name: $name" -H "X-User-Token: $token" -H "accept:application/json" http://localhost:3000/login

路由文件中肯定包含DELETE作为登录路由的一种方法。我正在使用defaultYesodMiddleware

这里是处理程序:

-- ^ Invalidate the user token
deleteLoginR :: Handler Aeson.Value
deleteLoginR = authenticateUser >>= \u ->
               let newU = u { DS.token = "" } in
               DS.saveEntity newU >>= \case
                Left e -> sendResponseStatus status500 (cs e :: Text)
                Right _ -> sendResponseStatus status200 ("Logged out" :: Text)

这是authenticateUser函数:

{-| Check that a user is properly logged in using the authentication headers -}
authenticateUser :: Handler User
authenticateUser = lookupHeader "X-User-Name" >>= \case 
                    Nothing ->
                      sendResponseStatus status406 ("X-User-Name not set" :: Text)
                    Just name ->
                      lookupHeader "X-User-Token" >>= \case
                        Nothing ->
                          sendResponseStatus status406 ("X-User-Token not set" :: Text)
                        Just token ->
                          (DS.loadEntities ["User"] constraints Nothing :: Handler (Either Text [User])) 
                          >>= \case 
                            Left e -> sendResponseStatus status500 (cs e :: Text)
                            Right records -> pure $ List.head records
                          where constraints = [ Where ("name", Equals, cs name)
                                              , Where ("token", Equals, cs token)
                                              ]

和路线声明:

/login LoginR GET POST PATCH DELETE

有人可以启发我吗?

1 个答案:

答案 0 :(得分:0)

解决了!这是堆栈中的某种缓存问题,它已经缓存了路由文件的旧版本。杀死yesod devel并运行stack build --force-dirty可以解决此问题。