úΉŠ…r'      !"#$%&None '(24=JKMA wrapper around '   a. Dan even more informative "your json request body wasn't valid" error =a more informative "you just got the HTTP method wrong" error the usual "not found" error+Make sure the incoming request starts with "/path"5, strip it and pass the rest of the request path to  sublayout. If you use (Ÿ in one of the endpoints for your API, this automatically requires your server-side handler to be a function that takes an argument of the type specified by (u. This lets servant worry about extracting it from the request and turning it into a value of the type you specify.All it asks is for a ) instance.Example: Çtype MyApi = "books" :> ReqBody Book :> Post Book server :: Server MyApi server = postBook where postBook :: Book -> EitherT (Int, String) IO Book postBook book = ...insert into your db...KJust pass the request to the underlying application and serve its response.Example: ^type MyApi = "images" :> Raw server :: Server MyApi server = serveDirectory "/var/www/images" If you use * "published"Ž in one of the endpoints for your API, this automatically requires your server-side handler to be a function that takes an argument of type +.Example: ÿ!type MyApi = "books" :> QueryFlag "published" :> Get [Book] server :: Server MyApi server = getBooks where getBooks :: Bool -> EitherT (Int, String) IO [Book] getBooks onlyPublished = ...return all books, or only the ones that are already published, depending on the argument... If you use , "authors" TextŽ in one of the endpoints for your API, this automatically requires your server-side handler to be a function that takes an argument of type [-].]This lets servant worry about looking up 0 or more values in the query string associated to authors@ and turning each of them into a value of the type you specify.=You can control how the individual values are converted from -2 to your type by simply providing an instance of . for your type.Example: ñtype MyApi = "books" :> QueryParams "authors" Text :> Get [Book] server :: Server MyApi server = getBooksBy where getBooksBy :: [Text] -> EitherT (Int, String) IO [Book] getBooksBy authors = ...return all books by these authors... If you use / "author" TextŽ in one of the endpoints for your API, this automatically requires your server-side handler to be a function that takes an argument of type 0 -.ƒThis lets servant worry about looking it up in the query string and turning it into a value of the type you specify, enclosed in 0?, because it may not be there and servant would then hand you 1.,You can control how it'll be converted from -2 to your type by simply providing an instance of . for your type.Example: ÿ2type MyApi = "books" :> QueryParam "author" Text :> Get [Book] server :: Server MyApi server = getBooksBy where getBooksBy :: Maybe Text -> EitherT (Int, String) IO [Book] getBooksBy Nothing = ...return all books... getBooksBy (Just author) = ...return books by the given author...$When implementing the handler for a 2 endpoint, just like for ,  and    , the handler code runs in the EitherT (Int, String) IO monad, where the 3% represents the status code and the 4D a message, returned in case of failure. You can quite handily use  1 to quickly fail if some conditions are not met.HIf successfully returning a value, we just require that its type has a 5a instance and servant takes care of encoding it for you, yielding status code 200 along the way.$When implementing the handler for a 6 endpoint, just like for ,  and   , the handler code runs in the EitherT (Int, String) IO monad, where the 3% represents the status code and the 4D a message, returned in case of failure. You can quite handily use  1 to quickly fail if some conditions are not met.HIf successfully returning a value, we just require that its type has a 5a instance and servant takes care of encoding it for you, yielding status code 201 along the way. If you use 7Ÿ in one of the endpoints for your API, this automatically requires your server-side handler to be a function that takes an argument of the type specified by 7u. This lets servant worry about extracting it from the request and turning it into a value of the type you specify.All it asks is for a . instance.Example: ÿQnewtype Referer = Referer Text deriving (Eq, Show, FromText, ToText) -- GET /view-my-referer type MyApi = "view-my-referer" :> Header "Referer" Referer :> Get Referer server :: Server MyApi server = viewReferer where viewReferer :: Referer -> EitherT (Int, String) IO referer viewReferer referer = return referer$When implementing the handler for a 8 endpoint, just like for ,    and   , the handler code runs in the EitherT (Int, String) IO monad, where the 3% represents the status code and the 4D a message, returned in case of failure. You can quite handily use  1 to quickly fail if some conditions are not met.HIf successfully returning a value, we just require that its type has a 5a instance and servant takes care of encoding it for you, yielding status code 200 along the way. If you have a 9U endpoint in your API, the handler for this endpoint is meant to delete a resource.-The code of the handler will, just like for ,    and   , run in EitherT (Int, String) IO (). The 3$ represents the status code and the 4( a message to be returned. You can use :S to painlessly error out if the conditions for a successful deletion are not met.! If you use ;£ in one of the endpoints for your API, this automatically requires your server-side handler to be a function that takes an argument of the type specified by the ;n. This lets servant worry about getting it from the URL and turning it into a value of the type you specify.,You can control how it'll be converted from -2 to your type by simply providing an instance of . for your type.Example: ´type MyApi = "books" :> Capture "isbn" Text :> Get Book server :: Server MyApi server = getBook where getBook :: Text -> EitherT (Int, String) IO Book getBook isbn = ..." A server for a < bD first tries to match the request again the route represented by a and if it fails tries b7. You must provide a request handler for each route. ätype MyApi = "books" :> Get [Book] -- GET /books :<|> "books" :> ReqBody Book :> Post Book -- POST /books server :: Server MyApi server = listAllBooks :<|> postBook where listAllBooks = ... postBook book = ...# If we get a =), it has precedence over everything else.6This in particular means that if we could get several =<s, only the first we encounter would be taken into account.$ $> mempty = NotFound > > NotFound > x = x > WrongMethod >) InvalidBody = InvalidBody > WrongMethod >) _ = WrongMethod > InvalidBody > _ = InvalidBody #the request, the field ? may be modified by url routing  !"#$ #  $#"!    !"#$None=K%%2 allows you to implement an API and produce a wai @.Example: ÿrtype MyApi = "books" :> Get [Book] -- GET /books :<|> "books" :> ReqBody Book :> Post Book -- POST /books server :: Server MyApi server = listAllBooks :<|> postBook where listAllBooks = ... postBook book = ... myApi :: Proxy MyApi myApi = Proxy app :: Application app = serve myApi server main :: IO () main = Network.Wai.Handler.Warp.run 8080 app%%%%None&2Serve anything under the specified directory as a A endpoint. Xtype MyApi = "static" :> Raw server :: Server MyApi server = serveDirectory "/var/www" would capture any request to /static/<something> and look for  <something> under /var/www.kIt will do its best to guess the MIME type for that file, based on the extension, and send an appropriate  Content-Type header if possible.±If your goal is to serve HTML, CSS and Javascript files that use the rest of the API as a webapp backend, you will most likely not want the static files to be hidden behind a /static/+ prefix. In that case, remember to put the &( handler in the last position, because servant* will try to match the handlers in order.&&&&None"BCDEFGHIJKL<;7/,*(8692AM.NO%&P !"#$%&'()*+,-./0123456789:;<=>9?@ABC9?DEFG9HI9?JKLKM9 ABNOP<=Q9  9RS99TU 9VW9XY7Z[\]^_]`a9bc9de9df9dg9dh9di9dj9dk9lm9no9no9XY9Hp9Hq9Hrsservant-server-0.2.3ServantServant.Server.InternalServant.ServerServant.Utils.StaticFilesServant.API.DeleteDeleteServant.API.GetGetServant.API.PostPostControl.Monad.Trans.EitherTleftServant.API.PutPutbase Data.ProxyProxy HasServerServerrouteRoutingApplication RouteResultRR routeResult RouteMismatch InvalidBody WrongMethodNotFound ReqBodyStateDoneCalledUncalled toApplicationfailWith succeedWith isMismatchcaptured$fHasServer*:>$fHasServer*:>0$fHasServer*Raw$fHasServer*:>1$fHasServer*:>2$fHasServer*:>3$fHasServer*Put$fHasServer*Post$fHasServer*:>4$fHasServer*Get$fHasServer*Delete$fHasServer*:>5$fHasServer*:<|>$fMonoidRouteResult$fMonoidRouteMismatchserveserveDirectory Data.EitherEither servant-0.2.1Servant.API.ReqBodyReqBody aeson-0.8.0.2Data.Aeson.Types.ClassFromJSONServant.API.QueryParam QueryFlagghc-prim GHC.TypesBool QueryParams text-1.2.0.3Data.Text.InternalTextServant.Common.TextFromText QueryParam Data.MaybeMaybeNothingIntGHC.BaseStringToJSONServant.API.HeaderHeadereither-4.3.2.1Control.Monad.Trans.EitherServant.API.CaptureCaptureServant.API.Alternative:<|>Right Data.Monoidmappend wai-3.0.2.1Network.Wai.InternalpathInfo Network.Wai ApplicationServant.API.RawRawServant.Utils.LinksIsElemIsLinkmkLink ValidLinkInLinkvlh VLinkHelper Servant.QQsitemapServant.API.Sub:>fromTexttoTextToText