symantic-http-client (empty) → 0.0.0.20190324
raw patch · 4 files changed
+1261/−0 lines, 4 filesdep +basedep +base64-bytestringdep +bytestring
Dependencies added: base, base64-bytestring, bytestring, containers, http-api-data, http-client, http-media, http-types, monad-classes, network-uri, stm, symantic-http, text, time, transformers, word8
Files
- COPYING +674/−0
- Symantic/HTTP/Client.hs +496/−0
- stack.yaml +10/−0
- symantic-http-client.cabal +81/−0
+ COPYING view
@@ -0,0 +1,674 @@+ GNU GENERAL PUBLIC LICENSE+ Version 3, 29 June 2007++ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>+ Everyone is permitted to copy and distribute verbatim copies+ of this license document, but changing it is not allowed.++ Preamble++ The GNU General Public License is a free, copyleft license for+software and other kinds of works.++ The licenses for most software and other practical works are designed+to take away your freedom to share and change the works. By contrast,+the GNU General Public License is intended to guarantee your freedom to+share and change all versions of a program--to make sure it remains free+software for all its users. We, the Free Software Foundation, use the+GNU General Public License for most of our software; it applies also to+any other work released this way by its authors. You can apply it to+your programs, too.++ When we speak of free software, we are referring to freedom, not+price. 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+ Symantic/HTTP/Client.hs view
@@ -0,0 +1,496 @@+{-# LANGUAGE DeriveFunctor #-}+{-# LANGUAGE GeneralizedNewtypeDeriving #-}+{-# LANGUAGE OverloadedStrings #-}+{-# LANGUAGE Rank2Types #-}+{-# LANGUAGE StrictData #-}+{-# OPTIONS_GHC -fno-warn-orphans #-}+-- | See <https://hackage.haskell.org/package/symantic-http-demo symantic-http-demo>+-- for an example of how to use this module.+module Symantic.HTTP.Client where++import Control.Applicative (Applicative(..){-, Alternative(..)-})+import Control.Monad (Monad(..), unless)+import Control.Monad.Trans.Class (MonadTrans(..))+import Data.Bool+import Data.Either (Either(..))+import Data.Eq (Eq(..))+import Data.Foldable (null, for_, toList)+import Data.Function (($), (.), id, on)+import Data.Functor (Functor(..), (<$>))+import Data.Maybe (Maybe(..), maybe, fromMaybe)+import Data.Ord (Ord(..))+import Data.Proxy (Proxy(..))+import Data.Semigroup (Semigroup(..))+import Data.String (IsString(..))+import Data.Text (Text)+import Data.Traversable (sequence)+import Data.Tuple (fst)+import GHC.Exts (fromList)+import System.IO (IO)+import Text.Read (readMaybe)+import Text.Show (Show(..))+import qualified Control.Concurrent.STM as STM+import qualified Control.Exception as Exn+import qualified Control.Monad.Classes as MC+import qualified Control.Monad.Trans.Except as E+import qualified Control.Monad.Trans.Reader as R+import qualified Data.ByteString as BS+import qualified Data.ByteString.Base64 as BS64+import qualified Data.ByteString.Builder as BSB+import qualified Data.ByteString.Lazy as BSL+import qualified Data.IORef as IO+import qualified Data.List as List+import qualified Data.List.NonEmpty as NonEmpty+import qualified Data.Sequence as Seq+import qualified Data.Text as Text+import qualified Data.Text.Encoding as Text+import qualified Data.Time.Clock as Time+import qualified Network.HTTP.Client as Client+import qualified Network.HTTP.Media as Media+import qualified Network.HTTP.Types as HTTP+import qualified Network.URI as URI+import qualified Web.HttpApiData as Web++import Symantic.HTTP.API+import Symantic.HTTP.URI+import Symantic.HTTP.MIME++-- * Type 'Client'+-- | @'Client' a k@ is a recipe to produce a 'ClientRequest'+-- from arguments 'requests' (one per number of alternative routes)+-- separated by (':!:').+--+-- 'Client' is analogous to a printf using a format customized for HTTP routing.+newtype Client requests k+ = Client+ { unClient :: (ClientModifier -> k) -> requests+ }++-- | @'client' requests@ returns the 'ClientRequest'+-- builders from the given API.+client :: Client requests ClientRequest -> requests+client (Client requests) = requests ($ ini)+ where+ ini = ClientRequest+ { clientReq_httpVersion = HTTP.http11+ , clientReq_method = HTTP.methodGet+ , clientReq_path = ""+ , clientReq_queryString = Seq.empty+ , clientReq_accept = Seq.empty+ , clientReq_headers = Seq.empty+ , clientReq_body = Nothing+ }++-- ** Type 'ClientModifier'+type ClientModifier = ClientRequest -> ClientRequest++instance Cat Client where+ Client x <.> Client y = Client $ \k ->+ x $ \fx -> y $ \fy -> k $ fy . fx+instance Alt Client where+ Client x <!> Client y = Client $ \k ->+ x k :!: y k+ {-+ type AltMerge Client = (:!:)+ Client x <!> Client y = Client $ \k ->+ x (\cm -> let n:!:_ = k cm in n) :!:+ y (\cm -> let _:!:n = k cm in n)+ -}+ -- try = id -- FIXME: see what to do+instance Pro Client where+ dimap _a2b b2a r = Client $ \k -> unClient r k . b2a++instance HTTP_Path Client where+ type PathConstraint Client a = Web.ToHttpApiData a+ segment s = Client $ \k -> k $ \req ->+ req{ clientReq_path = clientReq_path req <> "/" <> Web.toEncodedUrlPiece s }+ capture' _n = Client $ \k a -> k $ \req ->+ req{ clientReq_path = clientReq_path req <> "/" <> Web.toEncodedUrlPiece a }+ captureAll = Client $ \k ss -> k $ \req ->+ req{ clientReq_path =+ List.foldl' (\acc s -> acc <> "/" <> Web.toEncodedUrlPiece s) "" $+ Web.toUrlPiece <$> ss+ }+instance HTTP_Header Client where+ header n = Client $ \k v -> k $ \req ->+ req{ clientReq_headers = clientReq_headers req Seq.|> (n, Web.toHeader v) }+instance HTTP_BasicAuth Client where+ type BasicAuthArgs Client a k = BasicAuthUser -> BasicAuthPass -> k+ basicAuth' realm = Client $ \k user pass -> k $ \req ->+ req{ clientReq_headers =+ let user_pass = Text.encodeUtf8 $ user<>":"<>pass in+ clientReq_headers req Seq.|>+ ( HTTP.hAuthorization+ , Web.toHeader $ "Basic " <> BS64.encode user_pass+ )+ }+instance HTTP_Query Client where+ type QueryConstraint Client a = Web.ToHttpApiData a+ queryParams' n = Client $ \k vs -> k $ \req ->+ req{ clientReq_queryString =+ clientReq_queryString req <>+ fromList ((\v -> (n, Just $ Text.encodeUtf8 $ Web.toQueryParam v)) <$> vs) }+instance HTTP_Version Client where+ version v = Client $ \k -> k $ \req ->+ req{clientReq_httpVersion = v}++-- ** Type 'ClientBodyArg'+newtype ClientBodyArg (ts::[*]) a = ClientBodyArg a+instance HTTP_Body Client where+ type BodyConstraint Client a ts = MimeTypes ts (MimeEncodable a)+ type BodyArg Client a ts = ClientBodyArg ts a+ body' ::+ forall a ts k repr.+ BodyConstraint repr a ts =>+ repr ~ Client =>+ repr (BodyArg repr a ts -> k) k+ body'= Client $ \k (ClientBodyArg a) -> k $ \req ->+ req{clientReq_body =+ case NonEmpty.head (mimeTypes @ts) :: MimeType (MimeEncodable a) of+ MimeType (mt::Proxy t) ->+ Just+ ( Client.RequestBodyLBS $ mimeEncode mt a+ , mediaType @t )+ }++-- ** Type 'ClientBodyStreamArg'+newtype ClientBodyStreamArg framing (ts::[*]) as = ClientBodyStreamArg as+instance HTTP_BodyStream Client where+ type BodyStreamConstraint Client as ts framing =+ ( FramingEncode framing as+ , MimeTypes ts (MimeEncodable (FramingYield as))+ )+ type BodyStreamArg Client as ts framing = ClientBodyStreamArg framing ts as+ bodyStream' ::+ forall as ts framing k repr.+ BodyStreamConstraint repr as ts framing =>+ repr ~ Client =>+ repr (BodyStreamArg repr as ts framing -> k) k+ bodyStream'= Client $ \k (ClientBodyStreamArg as) -> k $ \req ->+ req{clientReq_body =+ case NonEmpty.head (mimeTypes @ts) :: MimeType (MimeEncodable (FramingYield as)) of+ MimeType (mt::Proxy t) ->+ Just $ (, mediaType @t) $+ Client.RequestBodyStreamChunked $ \write -> do+ let enc = framingEncode (Proxy @framing) (mimeEncode mt)+ ini <- enc as+ ioref <- IO.newIORef ini+ let go curr =+ case curr of+ Left _end -> return ""+ Right (bsl, next)+ | BSL.null bsl -> enc next >>= go+ -- NOTE: skip all null 'ByteString' because it would end the stream.+ | otherwise -> enc next >>= \n -> do+ IO.writeIORef ioref n+ return $ BSL.toStrict bsl+ -- NOTE: strictify the 'bsl' 'ByteString'+ -- instead of iterating on its chunks,+ -- in order to diminish the number of 'Client.connectionWrite'.+ write $ IO.readIORef ioref >>= go+ }++instance HTTP_Response Client where+ type ResponseConstraint Client a ts = MimeTypes ts (MimeDecodable a)+ type ResponseArgs Client a ts = Proxy ts -> Proxy a -> ClientRequest+ type Response Client = ClientRequest+ response ::+ forall a ts repr.+ ResponseConstraint repr a ts =>+ repr ~ Client =>+ HTTP.Method ->+ repr (ResponseArgs repr a ts)+ (Response repr)+ response m = Client $ \k Proxy Proxy -> k $ \req ->+ req+ { clientReq_method = m+ , clientReq_accept =+ clientReq_accept req <>+ fromList (toList $ mediaTypes @ts @(MimeDecodable a))+ }++instance HTTP_ResponseStream Client where+ type ResponseStreamConstraint Client as ts framing =+ MimeTypes ts (MimeDecodable (FramingYield as))+ type ResponseStreamArgs Client as ts framing =+ Proxy framing ->+ Proxy ts ->+ Proxy as ->+ ClientRequest+ type ResponseStream Client = ClientRequest+ + responseStream ::+ forall as ts framing repr.+ ResponseStreamConstraint repr as ts framing =>+ repr ~ Client =>+ HTTP.Method ->+ repr (ResponseStreamArgs repr as ts framing)+ (ResponseStream repr)+ responseStream m = Client $ \k Proxy Proxy Proxy -> k $ \req ->+ req+ { clientReq_method = m+ , clientReq_accept =+ clientReq_accept req <>+ fromList (toList $ mediaTypes @ts @(MimeDecodable (FramingYield as)))+ }++instance Web.ToHttpApiData BS.ByteString where+ toUrlPiece = Web.toUrlPiece . Text.decodeUtf8+ toHeader = id++-- * Type 'ClientConn'+-- | A monadic connection from a client to a server.+-- It is specialized in 'ClientConnection' and 'ClientConnectionStream'.+--+-- NOTE: no 'Monad' transformer is put within this newtype+-- to let @monad-classes@ handle all the |lift|ing.+newtype ClientConn m a+ = ClientConn+ { unClientConn :: m a+ } deriving (Functor, Applicative, Monad)+-- | All supported effects are handled by nested 'Monad's.+type instance MC.CanDo (ClientConn m) eff = 'False+instance MonadTrans ClientConn where+ lift = ClientConn++-- ** Type 'ClientEnv'+data ClientEnv+ = ClientEnv+ { clientEnv_manager :: Client.Manager+ , clientEnv_baseURI :: URI+ , clientEnv_cookieJar :: Maybe (STM.TVar Client.CookieJar)+ }+clientEnv :: Client.Manager -> URI -> ClientEnv+clientEnv clientEnv_manager clientEnv_baseURI =+ ClientEnv+ { clientEnv_cookieJar = Nothing+ , ..+ }++-- ** Type 'ClientError'+data ClientError+ -- | The server returned an error response+ = ClientError_FailureResponse ClientResponse+ -- | The body could not be decoded at the expected type+ | ClientError_DecodeFailure Text ClientResponse+ -- | The content-type of the response is not supported+ | ClientError_UnsupportedContentType BS.ByteString ClientResponse+ -- | There was a connection error, and no response was received+ | ClientError_ConnectionError Client.HttpException+ -- | 'ClientConn' is 'empty'+ | ClientError_EmptyClient+ deriving (Eq, Show{-, Generic, Typeable-})+instance Exn.Exception ClientError+instance Eq Client.HttpException where+ (==) = (==) `on` show++-- ** Type 'ClientRequest'+data ClientRequest+ = ClientRequest+ { clientReq_httpVersion :: HTTP.HttpVersion+ , clientReq_method :: HTTP.Method+ , clientReq_path :: BSB.Builder+ , clientReq_queryString :: Seq.Seq HTTP.QueryItem+ , clientReq_accept :: Seq.Seq Media.MediaType+ , clientReq_headers :: Seq.Seq HTTP.Header+ , clientReq_body :: Maybe (Client.RequestBody, Media.MediaType)+ }+instance Show ClientRequest where+ show _ = "ClientRequest"++clientRequest :: URI -> ClientRequest -> Client.Request+clientRequest baseURI req =+ Client.defaultRequest+ { Client.method = clientReq_method req+ , Client.host = maybe "" (fromString . URI.uriRegName) $ URI.uriAuthority baseURI+ , Client.port = case URI.uriPort <$> URI.uriAuthority baseURI of+ Just (':':p) | Just port <- readMaybe p -> port+ _ -> 0+ , Client.path = BSL.toStrict $ fromString (URI.uriPath baseURI) <> BSB.toLazyByteString (clientReq_path req)+ , Client.queryString = HTTP.renderQuery True . toList $ clientReq_queryString req+ , Client.requestHeaders = acceptHeader <> contentTypeHeader <> headers+ , Client.requestBody+ , Client.secure = URI.uriScheme baseURI == "https"+ }+ where+ headers = List.filter (\(h, _) -> h/="Accept" && h/="Content-Type") $+ toList $ clientReq_headers req+ + acceptHeader | null hs = []+ | otherwise = [("Accept", Media.renderHeader hs)]+ where+ hs = toList $ clientReq_accept req+ + (requestBody, contentTypeHeader) =+ case clientReq_body req of+ Nothing -> (Client.RequestBodyBS "", [])+ Just (b, mt) -> (b, [(HTTP.hContentType, Media.renderHeader mt)])++-- ** Type 'ClientConnection'+type ClientConnection+ = ClientConn (R.ReaderT ClientEnv (E.ExceptT ClientError IO))++{-+-- | Try clients in order, last error is preserved.+instance Alternative ClientConnection where+ empty = MC.throw $ ClientError_EmptyClient+ x <|> y = ClientConn $ do+ env <- MC.ask+ MC.exec @IO (E.runExceptT $ R.runReaderT (unClientConn x) env) >>= \case+ Right xa -> return xa+ Left _err -> unClientConn y+-}++runClient ::+ MimeTypes ts (MimeDecodable a) =>+ ClientEnv ->+ (Proxy ts -> Proxy a -> ClientRequest) ->+ IO (Either ClientError a)+runClient env =+ E.runExceptT .+ (`R.runReaderT` env) .+ unClientConn .+ clientConnection++clientConnection ::+ forall a ts.+ MimeTypes ts (MimeDecodable a) =>+ (Proxy ts -> Proxy a -> ClientRequest) ->+ ClientConnection a+clientConnection req = do+ clientRes <- doClientRequest $ req (Proxy::Proxy ts) (Proxy::Proxy a)+ let mtRes =+ fromMaybe "application/octet-stream" $+ List.lookup "Content-Type" $+ Client.responseHeaders clientRes+ case matchContent @ts @(MimeDecodable a) mtRes of+ Nothing -> MC.throw $ ClientError_UnsupportedContentType mtRes clientRes+ Just (MimeType mt) ->+ case mimeDecode mt $ Client.responseBody clientRes of+ Left err -> MC.throw $ ClientError_DecodeFailure (Text.pack err) clientRes+ Right val -> return val++doClientRequest :: ClientRequest -> ClientConnection ClientResponse+doClientRequest clientReq = do+ ClientEnv{..} <- MC.ask+ req <-+ let req = clientRequest clientEnv_baseURI clientReq in+ case clientEnv_cookieJar of+ Nothing -> pure req+ Just cj ->+ MC.exec @IO $ do+ now <- Time.getCurrentTime+ STM.atomically $ do+ oldCookieJar <- STM.readTVar cj+ let (newRequest, newCookieJar) =+ Client.insertCookiesIntoRequest req oldCookieJar now+ STM.writeTVar cj newCookieJar+ pure newRequest+ lrRes <-+ MC.exec @IO $ catchClientConnectionError $+ Client.httpLbs req clientEnv_manager+ case lrRes of+ Left err -> MC.throw err+ Right res -> do+ for_ clientEnv_cookieJar $ \cj ->+ MC.exec @IO $ do+ now <- Time.getCurrentTime+ STM.atomically $ STM.modifyTVar' cj (fst . Client.updateCookieJar res req now)+ let code = HTTP.statusCode $ Client.responseStatus res+ unless (code >= 200 && code < 300) $+ MC.throw $ ClientError_FailureResponse res+ return res++catchClientConnectionError :: IO a -> IO (Either ClientError a)+catchClientConnectionError ma =+ Exn.catch (Right <$> ma) $ \err ->+ return $ Left $ ClientError_ConnectionError err++-- *** Type 'ClientResponse'+type ClientResponse+ = Client.Response BSL.ByteString++-- ** Type 'ClientConnectionStream'+type ClientConnectionStream+ = ClientConn (R.ReaderT ClientEnv (Codensity (E.ExceptT ClientError IO)))++runClientStream ::+ FramingDecode framing as =>+ MC.MonadExec IO (FramingMonad as) =>+ MimeTypes ts (MimeDecodable (FramingYield as)) =>+ ClientEnv ->+ (Proxy framing -> Proxy ts -> Proxy as -> ClientRequest) ->+ (as -> IO b) -> IO (Either ClientError b)+runClientStream env req k =+ E.runExceptT $+ (`runCodensity` lift . k) $+ (`R.runReaderT` env) $+ unClientConn $+ clientConnectionStream req++clientConnectionStream ::+ forall as ts framing.+ FramingDecode framing as =>+ MC.MonadExec IO (FramingMonad as) =>+ MimeTypes ts (MimeDecodable (FramingYield as)) =>+ (Proxy framing -> Proxy ts -> Proxy as -> ClientRequest) ->+ ClientConnectionStream as+clientConnectionStream req = do+ doClientRequestStream (Proxy::Proxy ts) (req Proxy Proxy Proxy) $ \(MimeType mt) clientRes ->+ return $+ framingDecode (Proxy @framing) (mimeDecode mt) $+ MC.exec @IO $ Client.responseBody clientRes++doClientRequestStream ::+ forall (ts::[*]) as.+ MimeTypes ts (MimeDecodable (FramingYield as)) =>+ Proxy ts ->+ ClientRequest ->+ ( MimeType (MimeDecodable (FramingYield as)) ->+ Client.Response Client.BodyReader ->+ E.ExceptT ClientError IO as ) ->+ ClientConnectionStream as+doClientRequestStream Proxy clientReq k = do+ ClientEnv{..} <- MC.ask+ let req = clientRequest clientEnv_baseURI $ clientReq+ ClientConn $ lift $ Codensity $ \k' ->+ E.ExceptT $ Client.withResponse req clientEnv_manager $ \res ->+ E.runExceptT $ do{-E.ExceptT ClientError IO-}+ -- Check status+ let code = HTTP.statusCode $ Client.responseStatus res+ unless (code >= 200 && code < 300) $ do+ err <- MC.exec @IO $ sequence $ (BSL.fromChunks <$>) . Client.brConsume <$> res+ E.throwE $ ClientError_FailureResponse err+ -- Check Content-Type header+ let contentTypeH =+ fromMaybe "application/octet-stream" $+ List.lookup "Content-Type" $+ Client.responseHeaders res+ case matchContent @ts @(MimeDecodable (FramingYield as)) contentTypeH of+ Nothing -> do+ err <- MC.exec @IO $ sequence $ (BSL.fromChunks <$>) . Client.brConsume <$> res+ E.throwE $ ClientError_UnsupportedContentType contentTypeH err+ Just ct -> k ct res >>= k'++-- *** Type 'Codensity'+-- | Copy from the @kan-extensions@ package to avoid the dependencies.+newtype Codensity m a+ = Codensity+ { runCodensity :: forall b. (a -> m b) -> m b }+type instance MC.CanDo (Codensity m) (MC.EffExec eff) = 'False+instance Functor (Codensity k) where+ fmap f (Codensity m) = Codensity (\k -> m (k .f))+ {-# INLINE fmap #-}+instance Applicative (Codensity f) where+ pure x = Codensity (\k -> k x)+ {-# INLINE pure #-}+ Codensity f <*> Codensity g = Codensity (\bfr -> f (\ab -> g (bfr . ab)))+ {-# INLINE (<*>) #-}+instance Monad (Codensity f) where+ return = pure+ {-# INLINE return #-}+ m >>= k = Codensity (\c -> runCodensity m (\a -> runCodensity (k a) c))+ {-# INLINE (>>=) #-}+instance MonadTrans Codensity where+ lift m = Codensity (m >>=)+ {-# INLINE lift #-}
+ stack.yaml view
@@ -0,0 +1,10 @@+resolver: lts-12.26+packages:+- '.'+- location: '../symantic-http'+ extra-dep: true+extra-deps:+- http-api-data-0.4@sha256:ad69f7cd0d1e7723abfbed6f88ac987bdf75a402b29de161eb867c6131c9d427+- monad-classes-0.3.2.2@sha256:793faead28dafb47f115c4dec877ce3e3ffab604f134d852652385632ea0923f+nix:+ packages: [zlib]
+ symantic-http-client.cabal view
@@ -0,0 +1,81 @@+name: symantic-http-client+-- PVP: +-+------- breaking API changes+-- | | +----- non-breaking API additions+-- | | | +--- code changes with no API change+version: 0.0.0.20190324+category: Protocol+synopsis: symantic-http applied to the derivation of HTTP clients+description: + This library applies <https://hackage.haskell.org/package/symantic-http symantic-http>+ to the building of an HTTP client (request building and encoding)+ based upon <https://hackage.haskell.org/package/http-client http-client>.+ .+ For learning how to use this library,+ you can read the demo example+ in <git://git.autogeree.net/symantic-http symantic-http.git>.+extra-doc-files:+license: GPL-3+license-file: COPYING+stability: experimental+author: Julien Moutinho <julm+symantic-http@autogeree.net>+maintainer: Julien Moutinho <julm+symantic-http@autogeree.net>+bug-reports: Julien Moutinho <julm+symantic-http@autogeree.net>+-- homepage:++build-type: Simple+cabal-version: 1.24+tested-with: GHC==8.4.4+extra-source-files:+ stack.yaml+extra-tmp-files:++Source-Repository head+ location: git://git.autogeree.net/symantic-http+ type: git++Library+ exposed-modules:+ Symantic.HTTP.Client+ default-language: Haskell2010+ default-extensions:+ AllowAmbiguousTypes+ DataKinds+ FlexibleContexts+ FlexibleInstances+ InstanceSigs+ LambdaCase+ MultiParamTypeClasses+ NamedFieldPuns+ NoImplicitPrelude+ RecordWildCards+ ScopedTypeVariables+ TupleSections+ TypeApplications+ TypeFamilies+ TypeOperators+ ghc-options:+ -Wall+ -Wincomplete-uni-patterns+ -Wincomplete-record-updates+ -fno-warn-tabs+ -- -fhide-source-paths+ build-depends:+ symantic-http >= 0.0+ , base >= 4.10 && < 5+ , base64-bytestring >= 1.0.0.1+ , bytestring >= 0.10+ , containers >= 0.5+ , http-api-data >= 0.4+ , http-client >= 0.5.12+ , http-media >= 0.7+ , http-types >= 0.12+ , monad-classes >= 0.3.2+ , network-uri >= 2.6+ , stm >= 2.4.5+ , text >= 1.2+ , time >= 1.8+ , transformers >= 0.5+ , word8 >= 0.1.3+ -- pkgconfig-depends: zlib+ -- extra-libraries: z+