@@ -1,9 +1,19 @@
1+{-# LANGUAGE BangPatterns #-}
2+{-# LANGUAGE CPP #-}
13{-# LANGUAGE DataKinds #-}
4+{-# LANGUAGE DeriveDataTypeable #-}
5+{-# LANGUAGE DeriveGeneric #-}
6+{-# LANGUAGE DeriveLift #-}
7+{-# LANGUAGE FlexibleInstances #-}
8+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
29{-# LANGUAGE LambdaCase #-}
10+{-# LANGUAGE MultiParamTypeClasses #-}
311{-# LANGUAGE OverloadedStrings #-}
412{-# LANGUAGE QuasiQuotes #-}
13+{-# LANGUAGE RankNTypes #-}
514{-# LANGUAGE RecordWildCards #-}
615{-# LANGUAGE RoleAnnotations #-}
16+{-# LANGUAGE ScopedTypeVariables #-}
717{-# LANGUAGE TemplateHaskellQuotes #-}
818{-# LANGUAGE TypeFamilies #-}
919{-# LANGUAGE UndecidableInstances #-}
@@ -19,40 +29,61 @@
1929--
2030-- The documentation below is structured in such a way that the most
2131-- important information is presented first: you learn how to do HTTP
22−-- requests, how to embed them in the monad you have, and then it gives you
32+-- requests, how to embed them in any monad you have, and then it gives you
2333-- details about less-common things you may want to know about. The
2434-- documentation is written with sufficient coverage of details and
2535-- examples, and it's designed to be a complete tutorial on its own.
2636--
37+-- /(A modest intro goes here, click on 'req' to start making requests.)/
38+--
2739-- === About the library
2840--
29−-- Req is an HTTP client library that attempts to be easy-to-use, type-safe,
30−-- and expandable.
31−--
32−-- “Easy-to-use” means that the library is designed to be beginner-friendly
33−-- so it's simple to add to your monad stack, intuitive to work with,
34−-- well-documented, and does not get in your way. Doing HTTP requests is a
35−-- common task and a Haskell library for this should be approachable and
36−-- clear to beginners, thus certain compromises were made. For example, one
37−-- cannot currently modify 'L.ManagerSettings' of the default manager
38−-- because the library always uses the same implicit global manager for
39−-- simplicity and maximal connection sharing. There is a way to use your own
40−-- manager with different settings, but it requires more typing.
41−--
42−-- “Type-safe” means that the library tries to eliminate certain classes of
43−-- errors. For example, we have correct-by-construction URLs; it is
44−-- guaranteed that the user does not send the request body when using
45−-- methods like GET or OPTIONS, and the amount of implicit assumptions is
46−-- minimized by making the user specify their intentions in an explicit
47−-- form. For example, it's not possible to avoid specifying the body or the
48−-- method of a request. Authentication methods that assume HTTPS force the
49−-- user to use HTTPS at the type level.
50−--
51−-- “Expandable” refers to the ability to create new components without
52−-- having to resort to hacking. For example, it's possible to define your
53−-- own HTTP methods, create new ways to construct the body of a request,
54−-- create new authorization options, perform a request in a different way,
55−-- and create your own methods to parse a response.
41+-- Req is an easy-to-use, type-safe, expandable, high-level HTTP client
42+-- library that just works without any fooling around.
43+--
44+-- What does the phrase “easy-to-use” mean? It means that the library is
45+-- designed to be beginner-friendly so it's simple to add to your monad
46+-- stack, intuitive to work with, well-documented, and does not get in your
47+-- way. Doing HTTP requests is a common task and Haskell library for this
48+-- should be very approachable and clear to beginners, thus certain
49+-- compromises were made. For example, one cannot currently modify
50+-- 'L.ManagerSettings' of the default manager because the library always
51+-- uses the same implicit global manager for simplicity and maximal
52+-- connection sharing. There is a way to use your own manager with different
53+-- settings, but it requires a bit more typing.
54+--
55+-- “Type-safe” means that the library is protective and eliminates certain
56+-- classes of errors. For example, we have correct-by-construction 'Url's,
57+-- it's guaranteed that the user does not send the request body when using
58+-- methods like 'GET' or 'OPTIONS', and the amount of implicit assumptions
59+-- is minimized by making the user specify his\/her intentions in an
60+-- explicit form (for example, it's not possible to avoid specifying the
61+-- body or method of request). Authentication methods that assume HTTPS
62+-- force the user to use HTTPS at the type level. The library also carefully
63+-- hides underlying types from the lower-level @http-client@ package because
64+-- those types are not safe enough (for example 'L.Request' is an instance
65+-- of 'Data.String.IsString' and, if it's malformed, it will blow up at
66+-- run-time).
67+--
68+-- “Expandable” refers to the ability of the library to be expanded without
69+-- having to resort to ugly hacking. For example, it's possible to define
70+-- your own HTTP methods, create new ways to construct the body of a
71+-- request, create new authorization options, perform a request in a
72+-- different way, and create your own methods to parse and represent a
73+-- response. As the user extends the library to satisfy his\/her special
74+-- needs, the new solutions will work just like the built-ins. However, all
75+-- of the common cases are also covered by the library out-of-the-box.
76+--
77+-- “High-level” means that there are less details to worry about. The
78+-- library is a result of my experiences as a Haskell consultant. Working
79+-- for several clients, who had very different projects, showed me that the
80+-- library should adapt easily to any particular style of writing Haskell
81+-- applications. For example, some people prefer throwing exceptions, while
82+-- others are concerned with purity. Just define 'handleHttpException'
83+-- accordingly when making your monad instance of 'MonadHttp' and it will
84+-- play together seamlessly. Finally, the library cuts down boilerplate
85+-- considerably, and helps you write concise, easy to read, and maintainable
86+-- code.
5687--
5788-- === Using with other libraries
5889--
@@ -81,7 +112,6 @@ module Network.HTTP.Req
81112 -- $making-a-request
82113 req,
83114 reqBr,
84− reqCb,
85115 req',
86116 withReqManager,
87117
@@ -119,7 +149,6 @@ module Network.HTTP.Req
119149 useHttpsURI,
120150 useURI,
121151 urlQ,
122− renderUrl,
123152
124153 -- ** Body
125154 -- $body
@@ -144,13 +173,11 @@ module Network.HTTP.Req
144173 -- $query-parameters
145174 (=:),
146175 queryFlag,
147− formToQuery,
148176 QueryParam (..),
149177
150178 -- *** Headers
151179 header,
152180 attachHeader,
153− headerRedacted,
154181
155182 -- *** Cookies
156183 -- $cookies
@@ -197,78 +224,57 @@ module Network.HTTP.Req
197224
198225 -- * Other
199226 HttpException (..),
200− isStatusCodeException,
201227 CanHaveBody (..),
202228 Scheme (..),
203229 )
204230where
205231
206−import Blaze.ByteString.Builder qualified as BB
232+import qualified Blaze.ByteString.Builder as BB
207233import Control.Applicative
208234import Control.Arrow (first, second)
209235import Control.Exception hiding (Handler (..), TypeError)
210−import Control.Monad (guard, void, (>=>))
211236import Control.Monad.Base
212−import Control.Monad.Catch (Handler (..), MonadCatch, MonadMask, MonadThrow)
237+import Control.Monad.Catch (Handler (..))
213238import Control.Monad.IO.Class
214−import Control.Monad.IO.Unlift
215−import Control.Monad.Reader (ReaderT (ReaderT), ask, lift, runReaderT)
216−import Control.Monad.Trans.Accum (AccumT)
217−import Control.Monad.Trans.Cont (ContT)
239+import Control.Monad.Reader
218240import Control.Monad.Trans.Control
219−import Control.Monad.Trans.Except (ExceptT)
220−import Control.Monad.Trans.Identity (IdentityT)
221−import Control.Monad.Trans.Maybe (MaybeT)
222−import Control.Monad.Trans.RWS.CPS qualified as RWS.CPS
223−import Control.Monad.Trans.RWS.Lazy qualified as RWS.Lazy
224−import Control.Monad.Trans.RWS.Strict qualified as RWS.Strict
225−import Control.Monad.Trans.Select (SelectT)
226−import Control.Monad.Trans.State.Lazy qualified as State.Lazy
227−import Control.Monad.Trans.State.Strict qualified as State.Strict
228−import Control.Monad.Trans.Writer.CPS qualified as Writer.CPS
229−import Control.Monad.Trans.Writer.Lazy qualified as Writer.Lazy
230−import Control.Monad.Trans.Writer.Strict qualified as Writer.Strict
231241import Control.Retry
232242import Data.Aeson (FromJSON (..), ToJSON (..))
233−import Data.Aeson qualified as A
243+import qualified Data.Aeson as A
234244import Data.ByteString (ByteString)
235−import Data.ByteString qualified as B
236−import Data.ByteString.Lazy qualified as BL
237−import Data.CaseInsensitive qualified as CI
245+import qualified Data.ByteString as B
246+import qualified Data.ByteString.Lazy as BL
247+import qualified Data.CaseInsensitive as CI
238248import Data.Data (Data)
239−import Data.Default.Class (def)
240249import Data.Function (on)
241250import Data.IORef
242251import Data.Kind (Constraint, Type)
243252import Data.List (foldl', nubBy)
244253import Data.List.NonEmpty (NonEmpty (..))
245−import Data.List.NonEmpty qualified as NE
254+import qualified Data.List.NonEmpty as NE
246255import Data.Maybe (fromMaybe)
247256import Data.Proxy
248−import Data.Semigroup (Endo (..))
249−import Data.Set qualified as S
257+import Data.Semigroup hiding (Option, option)
250258import Data.Text (Text)
251−import Data.Text qualified as T
252−import Data.Text.Encoding qualified as T
259+import qualified Data.Text as T
260+import qualified Data.Text.Encoding as T
253261import Data.Typeable (Typeable, cast)
254262import GHC.Generics
255263import GHC.TypeLits
256−import Language.Haskell.TH qualified as TH
257−import Language.Haskell.TH.Quote qualified as TH
258−import Language.Haskell.TH.Syntax qualified as TH
259−import Network.Connection qualified as NC
260−import Network.HTTP.Client qualified as L
261−import Network.HTTP.Client.Internal qualified as LI
262−import Network.HTTP.Client.MultipartFormData qualified as LM
263−import Network.HTTP.Client.TLS qualified as L
264−import Network.HTTP.Types qualified as Y
264+import qualified Language.Haskell.TH as TH
265+import qualified Language.Haskell.TH.Quote as TH
266+import qualified Language.Haskell.TH.Syntax as TH
267+import qualified Network.Connection as NC
268+import qualified Network.HTTP.Client as L
269+import qualified Network.HTTP.Client.Internal as LI
270+import qualified Network.HTTP.Client.MultipartFormData as LM
271+import qualified Network.HTTP.Client.TLS as L
272+import qualified Network.HTTP.Types as Y
265273import System.IO.Unsafe (unsafePerformIO)
266274import Text.URI (URI)
267−import Text.URI qualified as URI
268−import Text.URI.QQ qualified as QQ
269−import Web.Authenticate.OAuth qualified as OAuth
270−import Web.FormUrlEncoded (FromForm (..), ToForm (..))
271−import Web.FormUrlEncoded qualified as Form
275+import qualified Text.URI as URI
276+import qualified Text.URI.QQ as QQ
277+import qualified Web.Authenticate.OAuth as OAuth
272278import Web.HttpApiData (ToHttpApiData (..))
273279
274280----------------------------------------------------------------------------
@@ -293,7 +299,7 @@ import Web.HttpApiData (ToHttpApiData (..))
293299--
294300-- @body@ is a body option such as 'NoReqBody' or 'ReqBodyJson'. The
295301-- tutorial has a section about HTTP bodies, but usage is very
296−-- straightforward and should be clear from the examples.
302+-- straightforward and should be clear from the examples below.
297303--
298304-- @response@ is a type hint how to make and interpret response of an HTTP
299305-- request. Out-of-the-box it can be the following:
@@ -421,7 +427,12 @@ req ::
421427 -- | Response
422428 m response
423429req method url body responseProxy options =
424− reqCb method url body responseProxy options pure
430+ reqBr method url body (options <> extraOptions) getHttpResponse
431+ where
432+ extraOptions =
433+ case acceptHeader responseProxy of
434+ Nothing -> mempty
435+ Just accept -> header "Accept" accept
425436
426437-- | A version of 'req' that does not use one of the predefined instances of
427438-- 'HttpResponse' but instead allows the user to consume @'L.Response'
@@ -446,58 +457,7 @@ reqBr ::
446457 (L.Response L.BodyReader -> IO a) ->
447458 -- | Result
448459 m a
449−reqBr method url body options consume =
450− req' method url body options (reqHandler consume)
451−
452−-- | A version of 'req' that takes a callback to modify the 'L.Request', but
453−-- otherwise performs the request identically.
454−--
455−-- @since 3.7.0
456−reqCb ::
457− ( MonadHttp m,
458− HttpMethod method,
459− HttpBody body,
460− HttpResponse response,
461− HttpBodyAllowed (AllowsBody method) (ProvidesBody body)
462− ) =>
463− -- | HTTP method
464− method ->
465− -- | 'Url'—location of resource
466− Url scheme ->
467− -- | Body of the request
468− body ->
469− -- | A hint how to interpret response
470− Proxy response ->
471− -- | Collection of optional parameters
472− Option scheme ->
473− -- | Callback to modify the request
474− (L.Request -> m L.Request) ->
475− -- | Response
476− m response
477−reqCb method url body responseProxy options adjustRequest =
478− req' method url body (options <> extraOptions) $ \request manager -> do
479− request' <- adjustRequest request
480− reqHandler getHttpResponse request' manager
481− where
482− extraOptions =
483− case acceptHeader responseProxy of
484− Nothing -> mempty
485− Just accept -> header "Accept" accept
486−
487−-- | The default handler function that the higher-level request functions
488−-- pass to 'req''. Internal function.
489−--
490−-- @since 3.7.0
491−reqHandler ::
492− (MonadHttp m) =>
493− -- | How to get final result from a 'L.Response'
494− (L.Response L.BodyReader -> IO b) ->
495− -- | 'L.Request' to perform
496− L.Request ->
497− -- | 'L.Manager' to use
498− L.Manager ->
499− m b
500−reqHandler consume request manager = do
460+reqBr method url body options consume = req' method url body options $ \request manager -> do
501461 HttpConfig {..} <- getHttpConfig
502462 let wrapVanilla = handle (throwIO . VanillaHttpException)
503463 wrapExc = handle (throwIO . LI.toHttpException request)
@@ -529,7 +489,7 @@ reqHandler consume request manager = do
529489 (const openResponse)
530490 )
531491 )
532− (preview, r') <- grabPreview httpConfigBodyPreviewLength r
492+ (preview, r') <- grabPreview bodyPreviewLength r
533493 mapM_ LI.throwHttp (httpConfigCheckResponse request r' preview)
534494 consume r'
535495 )
@@ -578,22 +538,22 @@ req' method url body options m = do
578538 nubHeaders
579539 <> getRequestMod options
580540 <> getRequestMod config
581− <> getRequestMod (Tagged body :: Tagged "body" body)
541+ <> getRequestMod (Womb body :: Womb "body" body)
582542 <> getRequestMod url
583− <> getRequestMod (Tagged method :: Tagged "method" method)
543+ <> getRequestMod (Womb method :: Womb "method" method)
584544 request <- finalizeRequest options request'
585545 withReqManager (m request)
586546
587547-- | Perform an action using the global implicit 'L.Manager' that the rest
588−-- of the library uses. This allows us to reuse connections that the
548+-- of the library uses. This allows to reuse connections that the
589549-- 'L.Manager' controls.
590−withReqManager :: (MonadIO m) => (L.Manager -> m a) -> m a
591−withReqManager m = m globalManager
550+withReqManager :: MonadIO m => (L.Manager -> m a) -> m a
551+withReqManager m = liftIO (readIORef globalManager) >>= m
592552
593−-- | The global 'L.Manager' that 'req' uses. Here we just go with the
594−-- default settings, so users don't need to deal with this manager stuff at
595−-- all, but when we create a request, instance 'HttpConfig' can affect the
596−-- default settings via 'getHttpConfig'.
553+-- | Global 'L.Manager' that 'req' uses. Here we just go with the default
554+-- settings, so users don't need to deal with this manager stuff at all, but
555+-- when we create a request, instance 'HttpConfig' can affect the default
556+-- settings via 'getHttpConfig'.
597557--
598558-- A note about safety, in case 'unsafePerformIO' looks suspicious to you.
599559-- The value of 'globalManager' is named and lives on top level. This means
@@ -601,16 +561,16 @@ withReqManager m = m globalManager
601561-- manager. From that moment on the 'IORef' will be just reused—exactly the
602562-- behavior we want here in order to maximize connection sharing. GHC could
603563-- spoil the plan by inlining the definition, hence the @NOINLINE@ pragma.
604−globalManager :: L.Manager
564+globalManager :: IORef L.Manager
605565globalManager = unsafePerformIO $ do
606566 context <- NC.initConnectionContext
607567 let settings =
608568 L.mkManagerSettingsContext
609569 (Just context)
610− def
570+ (NC.TLSSettingsSimple False False False)
611571 Nothing
612572 manager <- L.newManager settings
613− return manager
573+ newIORef manager
614574{-# NOINLINE globalManager #-}
615575
616576----------------------------------------------------------------------------
@@ -624,13 +584,13 @@ globalManager = unsafePerformIO $ do
624584-- When writing a library, keep your API polymorphic in terms of
625585-- 'MonadHttp', only define instance of 'MonadHttp' in final application.
626586-- Another option is to use a @newtype@-wrapped monad stack and define
627−-- 'MonadHttp' for it. As of the version /0.4.0/, the 'Req' monad that
628−-- follows this strategy is provided out-of-the-box (see below).
587+-- 'MonadHttp' for it. As of version /0.4.0/, the 'Req' monad that follows
588+-- this strategy is provided out-of-the-box (see below).
629589
630590-- | A type class for monads that support performing HTTP requests.
631591-- Typically, you only need to define the 'handleHttpException' method
632592-- unless you want to tweak 'HttpConfig'.
633−class (MonadIO m) => MonadHttp m where
593+class MonadIO m => MonadHttp m where
634594 -- | This method describes how to deal with 'HttpException' that was
635595 -- caught by the library. One option is to re-throw it if you are OK with
636596 -- exceptions, but if you prefer working with something like
@@ -638,16 +598,17 @@ class (MonadIO m) => MonadHttp m where
638598 -- 'Control.Monad.Except.throwError'.
639599 handleHttpException :: HttpException -> m a
640600
641− -- | Return the 'HttpConfig' to be used when performing HTTP requests.
642− -- Default implementation returns its 'def' value, which is described in
643− -- the documentation for the type. Common usage pattern with manually
644− -- defined 'getHttpConfig' is to return some hard-coded value, or a value
601+ -- | Return 'HttpConfig' to be used when performing HTTP requests. Default
602+ -- implementation returns its 'def' value, which is described in the
603+ -- documentation for the type. Common usage pattern with manually defined
604+ -- 'getHttpConfig' is to return some hard-coded value, or a value
645605 -- extracted from 'Control.Monad.Reader.MonadReader' if a more flexible
646606 -- approach to configuration is desirable.
647607 getHttpConfig :: m HttpConfig
648608 getHttpConfig = return defaultHttpConfig
649609
650−-- | 'HttpConfig' contains settings to be used when making HTTP requests.
610+-- | 'HttpConfig' contains general and default settings to be used when
611+-- making HTTP requests.
651612data HttpConfig = HttpConfig
652613 { -- | Proxy to use. By default values of @HTTP_PROXY@ and @HTTPS_PROXY@
653614 -- environment variables are respected, this setting overwrites them.
@@ -691,8 +652,8 @@ data HttpConfig = HttpConfig
691652 -- | The retry policy to use for request retrying. By default 'def' is
692653 -- used (see 'RetryPolicyM').
693654 --
694− -- __Note__: signature of this function was changed to disallow 'IO' in
695− -- version /1.0.0/ and then changed back to its current form in /3.1.0/.
655+ -- __Note__: signature of this function was changed in the version
656+ -- /1.0.0/.
696657 --
697658 -- @since 0.3.0
698659 httpConfigRetryPolicy :: RetryPolicyM IO,
@@ -705,19 +666,14 @@ data HttpConfig = HttpConfig
705666 -- @since 0.3.0
706667 httpConfigRetryJudge :: forall b. RetryStatus -> L.Response b -> Bool,
707668 -- | Similar to 'httpConfigRetryJudge', but is used to decide when to
708− -- retry requests that resulted in an exception. By default it retries
709− -- on response timeout and connection timeout (changed in version
710− -- /3.8.0/).
669+ -- retry requests that resulted in an exception.
711670 --
712671 -- @since 3.4.0
713− httpConfigRetryJudgeException :: RetryStatus -> SomeException -> Bool,
714− -- | Max length of preview fragment of response body.
715− --
716− -- @since 3.6.0
717− httpConfigBodyPreviewLength :: forall a. (Num a) => a
672+ httpConfigRetryJudgeException :: RetryStatus -> SomeException -> Bool
718673 }
674+ deriving (Typeable)
719675
720−-- | The default value of 'HttpConfig'.
676+-- | Default value of 'HttpConfig'.
721677--
722678-- @since 2.0.0
723679defaultHttpConfig :: HttpConfig
@@ -740,15 +696,7 @@ defaultHttpConfig =
740696 598, -- (Informal convention) Network read timeout error
741697 599 -- (Informal convention) Network connect timeout error
742698 ],
743− httpConfigRetryJudgeException = \_ e ->
744− case fromException e of
745− Just (L.HttpExceptionRequest _ c) ->
746− case c of
747− L.ResponseTimeout -> True
748− L.ConnectionTimeout -> True
749− _ -> False
750− _ -> False,
751− httpConfigBodyPreviewLength = 1024
699+ httpConfigRetryJudgeException = \_ _ -> False
752700 }
753701 where
754702 statusCode = Y.statusCode . L.responseStatus
@@ -761,7 +709,7 @@ instance RequestComponent HttpConfig where
761709 LI.requestManagerOverride = httpConfigAltManager
762710 }
763711
764−-- | A monad that allows us to run 'req' in any 'IO'-enabled monad without
712+-- | A monad that allows to run 'req' in any 'IO'-enabled monad without
765713-- having to define new instances.
766714--
767715-- @since 0.4.0
@@ -770,19 +718,9 @@ newtype Req a = Req (ReaderT HttpConfig IO a)
770718 ( Functor,
771719 Applicative,
772720 Monad,
773− MonadIO,
774− MonadUnliftIO
721+ MonadIO
775722 )
776723
777−-- | @since 3.7.0
778−deriving instance MonadThrow Req
779−
780−-- | @since 3.7.0
781−deriving instance MonadCatch Req
782−
783−-- | @since 3.7.0
784−deriving instance MonadMask Req
785−
786724instance MonadBase IO Req where
787725 liftBase = liftIO
788726
@@ -797,87 +735,12 @@ instance MonadHttp Req where
797735 handleHttpException = Req . lift . throwIO
798736 getHttpConfig = Req ask
799737
800−-- | @since 3.10.0
801−instance (MonadHttp m, Monoid w) => MonadHttp (AccumT w m) where
802− handleHttpException = lift . handleHttpException
803− getHttpConfig = lift getHttpConfig
804−
805−-- | @since 3.10.0
806−instance (MonadHttp m) => MonadHttp (ContT r m) where
807− handleHttpException = lift . handleHttpException
808− getHttpConfig = lift getHttpConfig
809−
810−-- | @since 3.10.0
811−instance (MonadHttp m) => MonadHttp (ExceptT e m) where
812− handleHttpException = lift . handleHttpException
813− getHttpConfig = lift getHttpConfig
814−
815−-- | @since 3.10.0
816−instance (MonadHttp m) => MonadHttp (IdentityT m) where
817− handleHttpException = lift . handleHttpException
818− getHttpConfig = lift getHttpConfig
819−
820−-- | @since 3.10.0
821−instance (MonadHttp m) => MonadHttp (MaybeT m) where
822− handleHttpException = lift . handleHttpException
823− getHttpConfig = lift getHttpConfig
824−
825−-- | @since 3.10.0
826−instance (MonadHttp m) => MonadHttp (ReaderT r m) where
827− handleHttpException = lift . handleHttpException
828− getHttpConfig = lift getHttpConfig
829−
830−-- | @since 3.10.0
831−instance (MonadHttp m, Monoid w) => MonadHttp (RWS.CPS.RWST r w s m) where
832− handleHttpException = lift . handleHttpException
833− getHttpConfig = lift getHttpConfig
834−
835−-- | @since 3.10.0
836−instance (MonadHttp m, Monoid w) => MonadHttp (RWS.Lazy.RWST r w s m) where
837− handleHttpException = lift . handleHttpException
838− getHttpConfig = lift getHttpConfig
839−
840−-- | @since 3.10.0
841−instance (MonadHttp m, Monoid w) => MonadHttp (RWS.Strict.RWST r w s m) where
842− handleHttpException = lift . handleHttpException
843− getHttpConfig = lift getHttpConfig
844−
845−-- | @since 3.10.0
846−instance (MonadHttp m) => MonadHttp (SelectT r m) where
847− handleHttpException = lift . handleHttpException
848− getHttpConfig = lift getHttpConfig
849−
850−-- | @since 3.10.0
851−instance (MonadHttp m) => MonadHttp (State.Lazy.StateT s m) where
852− handleHttpException = lift . handleHttpException
853− getHttpConfig = lift getHttpConfig
854−
855−-- | @since 3.10.0
856−instance (MonadHttp m) => MonadHttp (State.Strict.StateT s m) where
857− handleHttpException = lift . handleHttpException
858− getHttpConfig = lift getHttpConfig
859−
860−-- | @since 3.10.0
861−instance (MonadHttp m, Monoid w) => MonadHttp (Writer.CPS.WriterT w m) where
862− handleHttpException = lift . handleHttpException
863− getHttpConfig = lift getHttpConfig
864−
865−-- | @since 3.10.0
866−instance (MonadHttp m, Monoid w) => MonadHttp (Writer.Lazy.WriterT w m) where
867− handleHttpException = lift . handleHttpException
868− getHttpConfig = lift getHttpConfig
869−
870−-- | @since 3.10.0
871−instance (MonadHttp m, Monoid w) => MonadHttp (Writer.Strict.WriterT w m) where
872− handleHttpException = lift . handleHttpException
873− getHttpConfig = lift getHttpConfig
874−
875738-- | Run a computation in the 'Req' monad with the given 'HttpConfig'. In
876−-- the case of an exceptional situation an 'HttpException' will be thrown.
739+-- case of exceptional situation an 'HttpException' will be thrown.
877740--
878741-- @since 0.4.0
879742runReq ::
880− (MonadIO m) =>
743+ MonadIO m =>
881744 -- | 'HttpConfig' to use
882745 HttpConfig ->
883746 -- | Computation to run
@@ -982,7 +845,7 @@ class HttpMethod a where
982845 -- | Return name of the method as a 'ByteString'.
983846 httpMethodName :: Proxy a -> ByteString
984847
985−instance (HttpMethod method) => RequestComponent (Tagged "method" method) where
848+instance HttpMethod method => RequestComponent (Womb "method" method) where
986849 getRequestMod _ = Endo $ \x ->
987850 x {L.method = httpMethodName (Proxy :: Proxy method)}
988851
@@ -1024,20 +887,23 @@ instance (HttpMethod method) => RequestComponent (Tagged "method" method) where
1024887-- > -- https://%D1%8E%D0%BD%D0%B8%D0%BA%D0%BE%D0%B4.%D1%80%D1%84
1025888data Url (scheme :: Scheme) = Url Scheme (NonEmpty Text)
1026889 -- NOTE The second value is the path segments in reversed order.
1027− deriving (Eq, Ord, Show, Data, Generic)
890+ deriving (Eq, Ord, Show, Data, Typeable, Generic)
1028891
1029892type role Url nominal
1030893
1031894-- With template-haskell >=2.15 and text >=1.2.4 Lift can be derived, however
1032−-- the derived lift forgets the type of the scheme.
1033−instance (Typeable scheme) => TH.Lift (Url scheme) where
895+-- the derived lift forgets the type of scheme.
896+instance Typeable scheme => TH.Lift (Url scheme) where
1034897 lift url =
1035898 TH.dataToExpQ (fmap liftText . cast) url `TH.sigE` case url of
1036899 Url Http _ -> [t|Url 'Http|]
1037900 Url Https _ -> [t|Url 'Https|]
1038901 where
1039902 liftText t = TH.AppE (TH.VarE 'T.pack) <$> TH.lift (T.unpack t)
1040− liftTyped = TH.Code . TH.unsafeTExpCoerce . TH.lift
903+
904+#if MIN_VERSION_template_haskell(2,16,0)
905+ liftTyped url = TH.TExp <$> TH.lift url
906+#endif
1041907
1042908-- | Given host name, produce a 'Url' which has “http” as its scheme and
1043909-- empty path. This also sets port to @80@.
@@ -1049,33 +915,20 @@ http = Url Http . pure
1049915https :: Text -> Url 'Https
1050916https = Url Https . pure
1051917
1052−-- | Grow a given 'Url' appending a single path segment to it. Note that the
918+-- | Grow given 'Url' appending a single path segment to it. Note that the
1053919-- path segment can be of any type that is an instance of 'ToHttpApiData'.
1054920infixl 5 /~
1055921
1056−(/~) :: (ToHttpApiData a) => Url scheme -> a -> Url scheme
922+(/~) :: ToHttpApiData a => Url scheme -> a -> Url scheme
1057923Url secure path /~ segment = Url secure (NE.cons (toUrlPiece segment) path)
1058924
1059−-- | A type-constrained version of @('/~')@ to remove ambiguity in the cases
925+-- | Type-constrained version of @('/~')@ to remove ambiguity in the cases
1060926-- when next URL piece is a 'Data.Text.Text' literal.
1061927infixl 5 /:
1062928
1063929(/:) :: Url scheme -> Text -> Url scheme
1064930(/:) = (/~)
1065931
1066−-- | Render a 'Url' as 'Text'.
1067−--
1068−-- @since 3.4.0
1069−renderUrl :: Url scheme -> Text
1070−renderUrl = \case
1071− Url Https parts ->
1072− "https://" <> renderParts parts
1073− Url Http parts ->
1074− "http://" <> renderParts parts
1075− where
1076− renderParts parts =
1077− T.intercalate "/" (reverse $ NE.toList parts)
1078−
1079932-- | The 'useHttpURI' function provides an alternative method to get 'Url'
1080933-- (possibly with some 'Option's) from a 'URI'. This is useful when you are
1081934-- given a URL to query dynamically and don't know it beforehand.
@@ -1089,7 +942,8 @@ useHttpURI uri = do
1089942 urlHead <- http <$> uriHost uri
1090943 let url = case URI.uriPath uri of
1091944 Nothing -> urlHead
1092− Just uriPath -> uriPathToUrl uriPath urlHead
945+ Just (_, xs) ->
946+ foldl' (/:) urlHead (URI.unRText <$> NE.toList xs)
1093947 return (url, uriOptions uri)
1094948
1095949-- | Just like 'useHttpURI', but expects the “https” scheme.
@@ -1101,21 +955,10 @@ useHttpsURI uri = do
1101955 urlHead <- https <$> uriHost uri
1102956 let url = case URI.uriPath uri of
1103957 Nothing -> urlHead
1104− Just uriPath -> uriPathToUrl uriPath urlHead
958+ Just (_, xs) ->
959+ foldl' (/:) urlHead (URI.unRText <$> NE.toList xs)
1105960 return (url, uriOptions uri)
1106961
1107−-- | Convert URI path to a 'Url'. Internal.
1108−--
1109−-- @since 3.9.0
1110−uriPathToUrl ::
1111− (Bool, NonEmpty (URI.RText 'URI.PathPiece)) ->
1112− Url scheme ->
1113− Url scheme
1114−uriPathToUrl (trailingSlash, xs) urlHead =
1115− if trailingSlash then path /: T.empty else path
1116− where
1117− path = foldl' (/:) urlHead (URI.unRText <$> NE.toList xs)
1118−
1119962-- | A combination of 'useHttpURI' and 'useHttpsURI' for cases when scheme
1120963-- is not known in advance.
1121964--
@@ -1232,21 +1075,21 @@ data NoReqBody = NoReqBody
12321075instance HttpBody NoReqBody where
12331076 getRequestBody NoReqBody = L.RequestBodyBS B.empty
12341077
1235−-- | This body option allows us to use a JSON object as the request
1236−-- body—probably the most popular format right now. Just wrap a data type
1237−-- that is an instance of 'ToJSON' type class and you are done: it will be
1238−-- converted to JSON and inserted as request body.
1078+-- | This body option allows to use a JSON object as request body—probably
1079+-- the most popular format right now. Just wrap a data type that is an
1080+-- instance of 'ToJSON' type class and you are done: it will be converted to
1081+-- JSON and inserted as request body.
12391082--
12401083-- This body option sets the @Content-Type@ header to @\"application/json;
12411084-- charset=utf-8\"@ value.
12421085newtype ReqBodyJson a = ReqBodyJson a
12431086
1244−instance (ToJSON a) => HttpBody (ReqBodyJson a) where
1087+instance ToJSON a => HttpBody (ReqBodyJson a) where
12451088 getRequestBody (ReqBodyJson a) = L.RequestBodyLBS (A.encode a)
12461089 getRequestContentType _ = pure "application/json; charset=utf-8"
12471090
12481091-- | This body option streams request body from a file. It is expected that
1249−-- the file size does not change during streaming.
1092+-- the file size does not change during the streaming.
12501093--
12511094-- Using of this body option does not set the @Content-Type@ header.
12521095newtype ReqBodyFile = ReqBodyFile FilePath
@@ -1271,11 +1114,12 @@ newtype ReqBodyLbs = ReqBodyLbs BL.ByteString
12711114instance HttpBody ReqBodyLbs where
12721115 getRequestBody (ReqBodyLbs bs) = L.RequestBodyLBS bs
12731116
1274−-- | URL-encoded body. This can hold a collection of parameters which are
1275−-- encoded similarly to query parameters at the end of query string, with
1276−-- the only difference that they are stored in request body. The similarity
1277−-- is reflected in the API as well, as you can use the same combinators you
1278−-- would use to add query parameters: @('=:')@ and 'queryFlag'.
1117+-- | Form URL-encoded body. This can hold a collection of parameters which
1118+-- are encoded similarly to query parameters at the end of query string,
1119+-- with the only difference that they are stored in request body. The
1120+-- similarity is reflected in the API as well, as you can use the same
1121+-- combinators you would use to add query parameters: @('=:')@ and
1122+-- 'queryFlag'.
12791123--
12801124-- This body option sets the @Content-Type@ header to
12811125-- @\"application/x-www-form-urlencoded\"@ value.
@@ -1294,13 +1138,6 @@ newtype FormUrlEncodedParam = FormUrlEncodedParam [(Text, Maybe Text)]
12941138instance QueryParam FormUrlEncodedParam where
12951139 queryParam name mvalue =
12961140 FormUrlEncodedParam [(name, toQueryParam <$> mvalue)]
1297− queryParamToList (FormUrlEncodedParam p) = p
1298−
1299−-- | Use 'formToQuery'.
1300−--
1301−-- @since 3.11.0
1302−instance FromForm FormUrlEncodedParam where
1303− fromForm = Right . formToQuery
13041141
13051142-- | Multipart form data. Please consult the
13061143-- "Network.HTTP.Client.MultipartFormData" module for how to construct
@@ -1340,7 +1177,7 @@ instance HttpBody ReqBodyMultipart where
13401177-- | Create 'ReqBodyMultipart' request body from a collection of 'LM.Part's.
13411178--
13421179-- @since 0.2.0
1343−reqBodyMultipart :: (MonadIO m) => [LM.Part] -> m ReqBodyMultipart
1180+reqBodyMultipart :: MonadIO m => [LM.Part] -> m ReqBodyMultipart
13441181reqBodyMultipart parts = liftIO $ do
13451182 boundary <- LM.webkitBoundary
13461183 body <- LM.renderParts boundary parts
@@ -1368,6 +1205,9 @@ type family ProvidesBody body :: CanHaveBody where
13681205-- | This type function allows any HTTP body if method says it
13691206-- 'CanHaveBody'. When the method says it should have 'NoBody', the only
13701207-- body option to use is 'NoReqBody'.
1208+--
1209+-- __Note__: users of GHC 8.0.1 and later will see a slightly more friendly
1210+-- error message when method does not allow a body and body is provided.
13711211type family
13721212 HttpBodyAllowed
13731213 (allowsBody :: CanHaveBody)
@@ -1380,8 +1220,8 @@ type family
13801220 TypeError
13811221 ('Text "This HTTP method does not allow attaching a request body.")
13821222
1383−instance (HttpBody body) => RequestComponent (Tagged "body" body) where
1384− getRequestMod (Tagged body) = Endo $ \x ->
1223+instance HttpBody body => RequestComponent (Womb "body" body) where
1224+ getRequestMod (Womb body) = Endo $ \x ->
13851225 x
13861226 { L.requestBody = getRequestBody body,
13871227 L.requestHeaders =
@@ -1410,8 +1250,8 @@ data Option (scheme :: Scheme)
14101250 = Option (Endo (Y.QueryText, L.Request)) (Maybe (L.Request -> IO L.Request))
14111251
14121252-- NOTE 'QueryText' is just [(Text, Maybe Text)], we keep it along with
1413−-- Request to avoid appending to an existing query string in request every
1414−-- time new parameter is added. The additional Maybe (L.Request -> IO
1253+-- Request to avoid appending to existing query string in request every
1254+-- time new parameter is added. Additional Maybe (L.Request -> IO
14151255-- L.Request) is a finalizer that will be applied after all other
14161256-- transformations. This is for authentication methods that sign requests
14171257-- based on data in Request.
@@ -1426,12 +1266,6 @@ instance Monoid (Option scheme) where
14261266 mempty = Option mempty Nothing
14271267 mappend = (<>)
14281268
1429−-- | Use 'formToQuery'.
1430−--
1431−-- @since 3.11.0
1432−instance FromForm (Option scheme) where
1433− fromForm = Right . formToQuery
1434−
14351269-- | A helper to create an 'Option' that modifies only collection of query
14361270-- parameters. This helper is not a part of the public API.
14371271withQueryParams :: (Y.QueryText -> Y.QueryText) -> Option scheme
@@ -1450,7 +1284,7 @@ instance RequestComponent (Option scheme) where
14501284
14511285-- | Finalize given 'L.Request' by applying a finalizer from the given
14521286-- 'Option' (if it has any).
1453−finalizeRequest :: (MonadIO m) => Option scheme -> L.Request -> m L.Request
1287+finalizeRequest :: MonadIO m => Option scheme -> L.Request -> m L.Request
14541288finalizeRequest (Option _ mfinalizer) = liftIO . fromMaybe pure mfinalizer
14551289
14561290----------------------------------------------------------------------------
@@ -1474,7 +1308,7 @@ infix 7 =:
14741308(=:) :: (QueryParam param, ToHttpApiData a) => Text -> a -> param
14751309name =: value = queryParam name (pure value)
14761310
1477−-- | Construct a flag, that is, a valueless query parameter. For example, in
1311+-- | Construct a flag, that is, valueless query parameter. For example, in
14781312-- the following URL @\"a\"@ is a flag, while @\"b\"@ is a query parameter
14791313-- with a value:
14801314--
@@ -1483,27 +1317,9 @@ name =: value = queryParam name (pure value)
14831317-- This operator is defined in terms of 'queryParam':
14841318--
14851319-- > queryFlag name = queryParam name (Nothing :: Maybe ())
1486−queryFlag :: (QueryParam param) => Text -> param
1320+queryFlag :: QueryParam param => Text -> param
14871321queryFlag name = queryParam name (Nothing :: Maybe ())
14881322
1489−-- | Construct query parameters from a 'ToForm' instance. This function
1490−-- produces the same query params as 'Form.urlEncodeAsFormStable'.
1491−--
1492−-- Note that 'Form.Form' doesn't have the concept of parameters with the
1493−-- empty value (i.e. what you can get by @key =: ""@). If the value is
1494−-- empty, it will be encoded as a valueless parameter (i.e. what you can get
1495−-- by @queryFlag key@).
1496−--
1497−-- @since 3.11.0
1498−formToQuery :: (QueryParam param, Monoid param, ToForm f) => f -> param
1499−formToQuery f = mconcat . fmap toParam . Form.toListStable $ toForm f
1500− where
1501− toParam (key, val) =
1502− queryParam key $
1503− if val == ""
1504− then Nothing
1505− else Just val
1506−
15071323-- | A type class for query-parameter-like things. The reason to have an
15081324-- overloaded 'queryParam' is to be able to use it as an 'Option' and as a
15091325-- 'FormUrlEncodedParam' when constructing form URL encoded request bodies.
@@ -1513,17 +1329,11 @@ class QueryParam param where
15131329 -- 'Nothing', it won't be included at all (i.e. you create a flag this
15141330 -- way). It's recommended to use @('=:')@ and 'queryFlag' instead of this
15151331 -- method, because they are easier to read.
1516− queryParam :: (ToHttpApiData a) => Text -> Maybe a -> param
1517−
1518− -- | Get the query parameter names and values set by 'queryParam'.
1519− --
1520− -- @since 3.11.0
1521− queryParamToList :: param -> [(Text, Maybe Text)]
1332+ queryParam :: ToHttpApiData a => Text -> Maybe a -> param
15221333
15231334instance QueryParam (Option scheme) where
15241335 queryParam name mvalue =
15251336 withQueryParams ((:) (name, toQueryParam <$> mvalue))
1526− queryParamToList (Option f _) = fst $ appEndo f ([], L.defaultRequest)
15271337
15281338----------------------------------------------------------------------------
15291339-- Request—Optional parameters—Headers
@@ -1547,14 +1357,6 @@ attachHeader :: ByteString -> ByteString -> L.Request -> L.Request
15471357attachHeader name value x =
15481358 x {L.requestHeaders = (CI.mk name, value) : L.requestHeaders x}
15491359
1550−-- | Same as 'header', but with redacted values on print.
1551−--
1552−-- @since 3.13.0
1553−headerRedacted :: ByteString -> ByteString -> Option scheme
1554−headerRedacted name value = withRequest $ \x ->
1555− let y = attachHeader name value x
1556− in y {L.redactHeaders = CI.mk name `S.insert` L.redactHeaders y}
1557−
15581360----------------------------------------------------------------------------
15591361-- Request—Optional parameters—Cookies
15601362
@@ -1696,7 +1498,7 @@ customAuth = Option mempty . pure
16961498
16971499-- | Specify the port to connect to explicitly. Normally, 'Url' you use
16981500-- determines the default port: @80@ for HTTP and @443@ for HTTPS. This
1699−-- 'Option' allows us to choose an arbitrary port overwriting the defaults.
1501+-- 'Option' allows to choose an arbitrary port overwriting the defaults.
17001502port :: Int -> Option scheme
17011503port n = withRequest $ \x ->
17021504 x {L.port = n}
@@ -1711,8 +1513,8 @@ port n = withRequest $ \x ->
17111513--
17121514-- > decompress (const True)
17131515decompress ::
1714− -- | Predicate that is given MIME type, it returns 'True' when content
1715− -- should be decompressed on the fly.
1516+ -- | Predicate that is given MIME type, it
1517+ -- returns 'True' when content should be decompressed on the fly.
17161518 (ByteString -> Bool) ->
17171519 Option scheme
17181520decompress f = withRequest $ \x ->
@@ -1762,7 +1564,7 @@ ignoreResponse = Proxy
17621564newtype JsonResponse a = JsonResponse (L.Response a)
17631565 deriving (Show)
17641566
1765−instance (FromJSON a) => HttpResponse (JsonResponse a) where
1567+instance FromJSON a => HttpResponse (JsonResponse a) where
17661568 type HttpResponseBody (JsonResponse a) = a
17671569 toVanillaResponse (JsonResponse r) = r
17681570 getHttpResponse r = do
@@ -1814,7 +1616,7 @@ lbsResponse = Proxy
18141616----------------------------------------------------------------------------
18151617-- Helpers for response interpretations
18161618
1817−-- | Fetch beginning of the response and return it together with a new
1619+-- | Fetch beginning of response and return it together with new
18181620-- @'L.Response' 'L.BodyReader'@ that can be passed to 'getHttpResponse' and
18191621-- such.
18201622grabPreview ::
@@ -1878,14 +1680,14 @@ brReadN br n = go 0 id id
18781680
18791681-- | Get the response body.
18801682responseBody ::
1881− (HttpResponse response) =>
1683+ HttpResponse response =>
18821684 response ->
18831685 HttpResponseBody response
18841686responseBody = L.responseBody . toVanillaResponse
18851687
18861688-- | Get the response status code.
18871689responseStatusCode ::
1888− (HttpResponse response) =>
1690+ HttpResponse response =>
18891691 response ->
18901692 Int
18911693responseStatusCode =
@@ -1893,7 +1695,7 @@ responseStatusCode =
18931695
18941696-- | Get the response status message.
18951697responseStatusMessage ::
1896− (HttpResponse response) =>
1698+ HttpResponse response =>
18971699 response ->
18981700 ByteString
18991701responseStatusMessage =
@@ -1901,7 +1703,7 @@ responseStatusMessage =
19011703
19021704-- | Lookup a particular header from a response.
19031705responseHeader ::
1904− (HttpResponse response) =>
1706+ HttpResponse response =>
19051707 -- | Response interpretation
19061708 response ->
19071709 -- | Header to lookup
@@ -1913,7 +1715,7 @@ responseHeader r h =
19131715
19141716-- | Get the response 'L.CookieJar'.
19151717responseCookieJar ::
1916− (HttpResponse response) =>
1718+ HttpResponse response =>
19171719 response ->
19181720 L.CookieJar
19191721responseCookieJar = L.responseCookieJar . toVanillaResponse
@@ -1926,9 +1728,9 @@ responseCookieJar = L.responseCookieJar . toVanillaResponse
19261728-- To create a new response interpretation you just need to make your data
19271729-- type an instance of the 'HttpResponse' type class.
19281730
1929−-- | A type class for response interpretations. It allows us to describe how
1930−-- to consume the response from a @'L.Response' 'L.BodyReader'@ and produce
1931−-- the final result that is to be returned to the user.
1731+-- | A type class for response interpretations. It allows to describe how to
1732+-- consume response from a @'L.Response' 'L.BodyReader'@ and produce the
1733+-- final result that is to be returned to the user.
19321734class HttpResponse response where
19331735 -- | The associated type is the type of body that can be extracted from an
19341736 -- instance of 'HttpResponse'.
@@ -1967,16 +1769,6 @@ class HttpResponse response where
19671769 acceptHeader :: Proxy response -> Maybe ByteString
19681770 acceptHeader Proxy = Nothing
19691771
1970−-- | This instance has been added to make it easier to inspect 'L.Response'
1971−-- using Req's functions like 'responseStatusCode', 'responseStatusMessage',
1972−-- etc.
1973−--
1974−-- @since 3.12.0
1975−instance HttpResponse (L.Response ()) where
1976− type HttpResponseBody (L.Response ()) = ()
1977− toVanillaResponse = id
1978− getHttpResponse = return . void
1979−
19801772----------------------------------------------------------------------------
19811773-- Other
19821774
@@ -2002,7 +1794,7 @@ class RequestComponent a where
20021794-- method@ and @'HttpBody' body => 'RequestComponent' body@ when it decides
20031795-- which instance to use (i.e. the constraints are taken into account later,
20041796-- when instance is already chosen).
2005−newtype Tagged (tag :: Symbol) a = Tagged a
1797+newtype Womb (tag :: Symbol) a = Womb a
20061798
20071799-- | Exceptions that this library throws.
20081800data HttpException
@@ -2011,24 +1803,10 @@ data HttpException
20111803 | -- | A wrapper with Aeson-produced 'String' describing why decoding
20121804 -- failed
20131805 JsonHttpException String
2014− deriving (Show, Generic)
1806+ deriving (Show, Typeable, Generic)
20151807
20161808instance Exception HttpException
20171809
2018−-- | Return 'Just' if the given 'HttpException' is wrapping a http-client's
2019−-- 'L.StatusCodeException'. Otherwise, return 'Nothing'.
2020−--
2021−-- @since 3.12.0
2022−isStatusCodeException :: HttpException -> Maybe (L.Response ())
2023−isStatusCodeException
2024− ( VanillaHttpException
2025− ( L.HttpExceptionRequest
2026− _
2027− (L.StatusCodeException r _)
2028− )
2029− ) = Just r
2030−isStatusCodeException _ = Nothing
2031−
20321810-- | A simple type isomorphic to 'Bool' that we only have for better error
20331811-- messages. We use it as a kind and its data constructors as type-level
20341812-- tags.
@@ -2048,4 +1826,11 @@ data Scheme
20481826 Http
20491827 | -- | HTTPS
20501828 Https
2051− deriving (Eq, Ord, Show, Data, Generic, TH.Lift)
1829+ deriving (Eq, Ord, Show, Data, Typeable, Generic, TH.Lift)
1830+
1831+----------------------------------------------------------------------------
1832+-- Constants
1833+
1834+-- | Max length of preview fragment of response body.
1835+bodyPreviewLength :: Num a => a
1836+bodyPreviewLength = 1024