Add list of supported content types to documentation
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Thomas Sutton
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0daa8d27a5
1 changed files with 79 additions and 36 deletions
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@ -148,8 +148,8 @@ module Servant.Docs
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, DocQueryParam(..), ParamKind(..), paramName, paramValues, paramDesc, paramKind
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, DocNote(..), noteTitle, noteBody
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, DocIntro(..)
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, Response, respStatus, respBody, defResponse
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, Action, captures, headers, notes, params, rqbody, response, defAction
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, Response, respStatus, respTypes, respBody, defResponse
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, Action, captures, headers, notes, params, rqtypes, rqbody, response, defAction
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, single
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, -- * Useful modules when defining your doc printers
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@ -304,22 +304,24 @@ data DocNote = DocNote
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data ParamKind = Normal | List | Flag
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deriving (Eq, Show)
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-- | A type to represent an HTTP response. Has an 'Int' status and
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-- a 'Maybe ByteString' response body. Tweak 'defResponse' using
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-- the 'respStatus' and 'respBody' lenses if you want.
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-- | A type to represent an HTTP response. Has an 'Int' status, a list of
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-- possible 'MediaType's, and a list of example 'ByteString' response bodies.
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-- Tweak 'defResponse' using the 'respStatus', 'respTypes' and 'respBody'
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-- lenses if you want.
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--
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-- If you want to respond with a non-empty response body, you'll most likely
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-- want to write a 'ToSample' instance for the type that'll be represented
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-- as some JSON in the response.
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-- as encoded data in the response.
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--
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-- Can be tweaked with two lenses.
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-- Can be tweaked with three lenses.
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--
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-- > λ> defResponse
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-- > Response {_respStatus = 200, _respBody = []}
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-- > Response {_respStatus = 200, _respTypes = [], _respBody = []}
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-- > λ> defResponse & respStatus .~ 204 & respBody .~ [("If everything goes well", "{ \"status\": \"ok\" }")]
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-- > Response {_respStatus = 204, _respBody = [("If everything goes well", "{ \"status\": \"ok\" }")]}
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-- > Response {_respStatus = 204, _respTypes = [], _respBody = [("If everything goes well", "{ \"status\": \"ok\" }")]}
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data Response = Response
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{ _respStatus :: Int
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, _respTypes :: [M.MediaType]
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, _respBody :: [(Text, M.MediaType, ByteString)]
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} deriving (Eq, Show)
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@ -332,7 +334,7 @@ data Response = Response
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-- > λ> defResponse & respStatus .~ 204 & respBody .~ Just "[]"
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-- > Response {_respStatus = 204, _respBody = Just "[]"}
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defResponse :: Response
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defResponse = Response 200 []
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defResponse = Response 200 [] []
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-- | A datatype that represents everything that can happen
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-- at an endpoint, with its lenses:
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@ -350,7 +352,8 @@ data Action = Action
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, _params :: [DocQueryParam] -- type collected + user supplied info
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, _notes :: [DocNote] -- user supplied
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, _mxParams :: [(String, [DocQueryParam])] -- type collected + user supplied info
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, _rqbody :: Maybe [(M.MediaType, ByteString)] -- user supplied
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, _rqtypes :: [M.MediaType] -- type collected
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, _rqbody :: [(M.MediaType, ByteString)] -- user supplied
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, _response :: Response -- user supplied
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} deriving (Eq, Show)
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@ -370,7 +373,8 @@ defAction =
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[]
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[]
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[]
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Nothing
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[]
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[]
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defResponse
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-- | Create an API that's comprised of a single endpoint.
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@ -449,9 +453,9 @@ sampleByteString
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:: forall ctypes a. (ToSample a, IsNonEmpty ctypes, AllMimeRender ctypes a)
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=> Proxy ctypes
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-> Proxy a
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-> Maybe [(M.MediaType, ByteString)]
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-> [(M.MediaType, ByteString)]
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sampleByteString ctypes@Proxy Proxy =
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fmap (amr ctypes) (toSample :: Maybe a)
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maybe [] (amr ctypes) (toSample :: Maybe a)
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-- | Synthesise a list of sample values of a particular type, encoded in the
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-- specified media types.
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@ -465,6 +469,25 @@ sampleByteStrings ctypes@Proxy Proxy =
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enc (t, s) = uncurry (t,,) <$> amr ctypes s
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in concatMap enc samples
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-- | Generate a list of 'MediaType' values describing the content types
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-- accepted by an API component.
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class SupportedTypes (list :: [*]) where
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supportedTypes :: Proxy list -> [M.MediaType]
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instance SupportedTypes '[] where
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supportedTypes Proxy = []
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instance (Accept ctype) => SupportedTypes '[ctype] where
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supportedTypes Proxy = [ contentType (Proxy :: Proxy ctype) ]
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instance (Accept ctype, Accept ctype', SupportedTypes rest)
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=> SupportedTypes (ctype ': ctype' ': rest) where
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supportedTypes Proxy =
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[ contentType (Proxy :: Proxy ctype)
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, contentType (Proxy :: Proxy ctype')
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] <> supportedTypes (Proxy :: Proxy rest)
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-- | The class that helps us automatically get documentation
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-- for GET parameters.
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--
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@ -504,7 +527,7 @@ markdown api = unlines $
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mxParamsStr (action ^. mxParams) ++
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headersStr (action ^. headers) ++
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paramsStr (action ^. params) ++
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rqbodyStr (action ^. rqbody) ++
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rqbodyStr (action ^. rqtypes) (action ^. rqbody) ++
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responseStr (action ^. response) ++
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[]
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@ -541,6 +564,7 @@ markdown api = unlines $
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map captureStr l ++
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"" :
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[]
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captureStr cap =
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"- *" ++ (cap ^. capSymbol) ++ "*: " ++ (cap ^. capDesc)
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@ -552,6 +576,7 @@ markdown api = unlines $
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map segmentStr l ++
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"" :
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[]
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segmentStr :: (String, [DocQueryParam]) -> String
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segmentStr (segment, l) = unlines $
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("**" ++ segment ++ "**:") :
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@ -575,6 +600,7 @@ markdown api = unlines $
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map paramStr l ++
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"" :
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[]
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paramStr param = unlines $
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("- " ++ param ^. paramName) :
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(if (not (null values) || param ^. paramKind /= Flag)
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@ -592,12 +618,20 @@ markdown api = unlines $
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where values = param ^. paramValues
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rqbodyStr :: Maybe [(M.MediaType, ByteString)]-> [String]
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rqbodyStr Nothing = []
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rqbodyStr (Just b) = concatMap formatBody b
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rqbodyStr :: [M.MediaType] -> [(M.MediaType, ByteString)]-> [String]
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rqbodyStr [] [] = []
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rqbodyStr types samples =
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["#### Request:", ""]
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<> formatTypes types
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<> concatMap formatBody samples
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formatTypes [] = []
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formatTypes ts = ["- Supported content types are: ", ""]
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<> map (\t -> " - `" <> show t <> "`") ts
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<> [""]
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formatBody (m, b) =
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"#### Request Body: `" <> show (M.mainType m <> "/" <> M.subType m) <> "`" :
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"- Example: `" <> cs (M.mainType m <> "/" <> M.subType m) <> "`" :
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contentStr m b
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markdownForType mime_type =
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@ -606,6 +640,7 @@ markdown api = unlines $
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("application", "xml") -> "xml"
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("application", "json") -> "javascript"
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("application", "javascript") -> "javascript"
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("text", "css") -> "css"
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(_, _) -> ""
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contentStr mime_type body =
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@ -621,6 +656,8 @@ markdown api = unlines $
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"#### Response:" :
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"" :
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("- Status code " ++ show (resp ^. respStatus)) :
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"" :
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formatTypes (resp ^. respTypes) ++
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bodies
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where bodies = case resp ^. respBody of
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@ -669,16 +706,17 @@ instance HasDocs Delete where
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action' = action & response.respBody .~ []
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& response.respStatus .~ 204
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instance (ToSample a, IsNonEmpty cts, AllMimeRender cts a) => HasDocs (Get cts a) where
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instance (ToSample a, IsNonEmpty cts, AllMimeRender cts a, SupportedTypes cts)
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=> HasDocs (Get cts a) where
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docsFor Proxy (endpoint, action) =
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single endpoint' action'
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where endpoint' = endpoint & method .~ DocGET
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action' = action & response.respBody .~ sampleByteStrings t p
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& response.respTypes .~ supportedTypes t
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t = Proxy :: Proxy cts
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p = Proxy :: Proxy a
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instance (KnownSymbol sym, HasDocs sublayout)
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=> HasDocs (Header sym a :> sublayout) where
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docsFor Proxy (endpoint, action) =
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@ -688,22 +726,26 @@ instance (KnownSymbol sym, HasDocs sublayout)
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action' = over headers (|> headername) action
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headername = pack $ symbolVal (Proxy :: Proxy sym)
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instance (ToSample a, IsNonEmpty cts, AllMimeRender cts a) => HasDocs (Post cts a) where
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instance (ToSample a, IsNonEmpty cts, AllMimeRender cts a, SupportedTypes cts)
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=> HasDocs (Post cts a) where
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docsFor Proxy (endpoint, action) =
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single endpoint' action'
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where endpoint' = endpoint & method .~ DocPOST
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action' = action & response.respBody .~ sampleByteStrings t p
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& response.respTypes .~ supportedTypes t
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& response.respStatus .~ 201
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t = Proxy :: Proxy cts
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p = Proxy :: Proxy a
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instance (ToSample a, IsNonEmpty cts, AllMimeRender cts a) => HasDocs (Put cts a) where
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instance (ToSample a, IsNonEmpty cts, AllMimeRender cts a, SupportedTypes cts)
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=> HasDocs (Put cts a) where
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docsFor Proxy (endpoint, action) =
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single endpoint' action'
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where endpoint' = endpoint & method .~ DocPUT
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action' = action & response.respBody .~ sampleByteStrings t p
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& response.respTypes .~ supportedTypes t
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& response.respStatus .~ 200
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t = Proxy :: Proxy cts
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p = Proxy :: Proxy a
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@ -790,7 +832,7 @@ instance HasDocs Raw where
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-- example data. However, there's no reason to believe that the instances of
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-- 'AllMimeUnrender' and 'AllMimeRender' actually agree (or to suppose that
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-- both are even defined) for any particular type.
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instance (ToSample a, IsNonEmpty cts, AllMimeRender cts a, HasDocs sublayout)
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instance (ToSample a, IsNonEmpty cts, AllMimeRender cts a, HasDocs sublayout, SupportedTypes cts)
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=> HasDocs (ReqBody cts a :> sublayout) where
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docsFor Proxy (endpoint, action) =
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@ -798,6 +840,7 @@ instance (ToSample a, IsNonEmpty cts, AllMimeRender cts a, HasDocs sublayout)
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where sublayoutP = Proxy :: Proxy sublayout
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action' = action & rqbody .~ sampleByteString t p
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& rqtypes .~ supportedTypes t
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t = Proxy :: Proxy cts
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p = Proxy :: Proxy a
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