@@ -1,16 +1,6 @@
1−{-# LANGUAGE DataKinds #-}
2−{-# LANGUAGE LambdaCase #-}
3−{-# LANGUAGE OverloadedStrings #-}
4−{-# LANGUAGE QuasiQuotes #-}
5−{-# LANGUAGE RecordWildCards #-}
6−{-# LANGUAGE RoleAnnotations #-}
7−{-# LANGUAGE TemplateHaskellQuotes #-}
8−{-# LANGUAGE TypeFamilies #-}
9−{-# LANGUAGE UndecidableInstances #-}
10−
111-- |
122-- Module : Network.HTTP.Req
13−-- Copyright : © 2016–present Mark Karpov
3+-- Copyright : © 2016–2018 Mark Karpov
144-- License : BSD 3 clause
155--
166-- Maintainer : Mark Karpov <markkarpov92@gmail.com>
@@ -19,40 +9,61 @@
199--
2010-- The documentation below is structured in such a way that the most
2111-- 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
12+-- requests, how to embed them in any monad you have, and then it gives you
2313-- details about less-common things you may want to know about. The
2414-- documentation is written with sufficient coverage of details and
2515-- examples, and it's designed to be a complete tutorial on its own.
2616--
17+-- /(A modest intro goes here, click on 'req' to start making requests.)/
18+--
2719-- === About the library
2820--
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.
21+-- Req is an easy-to-use, type-safe, expandable, high-level HTTP client
22+-- library that just works without any fooling around.
23+--
24+-- What does the phrase “easy-to-use” mean? It means that the library is
25+-- designed to be beginner-friendly so it's simple to add to your monad
26+-- stack, intuitive to work with, well-documented, and does not get in your
27+-- way. Doing HTTP requests is a common task and a Haskell library for this
28+-- should be very approachable and clear to beginners, thus certain
29+-- compromises were made. For example, one cannot currently modify
30+-- 'L.ManagerSettings' of the default manager because the library always
31+-- uses the same implicit global manager for simplicity and maximal
32+-- connection sharing. There is a way to use your own manager with different
33+-- settings, but it requires a bit more typing.
34+--
35+-- “Type-safe” means that the library is protective and eliminates certain
36+-- classes of errors. For example, we have correct-by-construction 'Url's,
37+-- it's guaranteed that the user does not send the request body when using
38+-- methods like 'GET' or 'OPTIONS', and the amount of implicit assumptions
39+-- is minimized by making the user specify his\/her intentions in an
40+-- explicit form (for example, it's not possible to avoid specifying the
41+-- body or method of a request). Authentication methods that assume HTTPS
42+-- force the user to use HTTPS at the type level. The library also carefully
43+-- hides underlying types from the lower-level @http-client@ package because
44+-- those types are not safe enough (for example 'L.Request' is an instance
45+-- of 'Data.String.IsString' and, if it's malformed, it will blow up at
46+-- run-time).
47+--
48+-- “Expandable” refers to the ability of the library to be expanded without
49+-- having to resort to ugly hacking. For example, it's possible to define
50+-- your own HTTP methods, create new ways to construct the body of a
51+-- request, create new authorization options, perform a request in a
52+-- different way, and create your own methods to parse and represent a
53+-- response. As a user extends the library to satisfy his\/her special
54+-- needs, the new solutions will work just like the built-ins. However, all
55+-- of the common cases are also covered by the library out-of-the-box.
56+--
57+-- “High-level” means that there are less details to worry about. The
58+-- library is a result of my experiences as a Haskell consultant. Working
59+-- for several clients, who had very different projects, showed me that the
60+-- library should adapt easily to any particular style of writing Haskell
61+-- applications. For example, some people prefer throwing exceptions, while
62+-- others are concerned with purity. Just define 'handleHttpException'
63+-- accordingly when making your monad instance of 'MonadHttp' and it will
64+-- play together seamlessly. Finally, the library cuts boilerplate down
65+-- considerably, and helps you write concise, easy to read, and maintainable
66+-- code.
5667--
5768-- === Using with other libraries
5869--
@@ -76,200 +87,181 @@
7687-- the whole Haskell ecosystem uses, there is no risk in using @req@. The
7788-- machinery for performing requests is the same as with @http-conduit@ and
7889-- @wreq@. The only difference is the API.
90+
91+{-# LANGUAGE BangPatterns #-}
92+{-# LANGUAGE CPP #-}
93+{-# LANGUAGE DataKinds #-}
94+{-# LANGUAGE DeriveDataTypeable #-}
95+{-# LANGUAGE DeriveGeneric #-}
96+{-# LANGUAGE FlexibleInstances #-}
97+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
98+{-# LANGUAGE KindSignatures #-}
99+{-# LANGUAGE MultiParamTypeClasses #-}
100+{-# LANGUAGE OverloadedStrings #-}
101+{-# LANGUAGE RankNTypes #-}
102+{-# LANGUAGE RecordWildCards #-}
103+{-# LANGUAGE ScopedTypeVariables #-}
104+{-# LANGUAGE TypeFamilies #-}
105+
106+#if MIN_VERSION_base(4,9,0)
107+{-# LANGUAGE UndecidableInstances #-}
108+#endif
109+
110+#if __GLASGOW_HASKELL__ >= 800
111+{-# OPTIONS_GHC -fno-warn-redundant-constraints #-}
112+#endif
113+
79114module Network.HTTP.Req
80115 ( -- * Making a request
81116 -- $making-a-request
82− req,
83− reqBr,
84− reqCb,
85− req',
86− withReqManager,
87−
88− -- * Embedding requests in your monad
117+ req
118+ , reqBr
119+ , req'
120+ , withReqManager
121+ -- * Embedding requests into your monad
89122 -- $embedding-requests
90− MonadHttp (..),
91− HttpConfig (..),
92− defaultHttpConfig,
93− Req,
94− runReq,
95−
123+ , MonadHttp (..)
124+ , HttpConfig (..)
125+ , Req
126+ , runReq
96127 -- * Request
97−
98128 -- ** Method
99129 -- $method
100− GET (..),
101− POST (..),
102− HEAD (..),
103− PUT (..),
104− DELETE (..),
105− TRACE (..),
106− CONNECT (..),
107− OPTIONS (..),
108− PATCH (..),
109− HttpMethod (..),
110−
130+ , GET (..)
131+ , POST (..)
132+ , HEAD (..)
133+ , PUT (..)
134+ , DELETE (..)
135+ , TRACE (..)
136+ , CONNECT (..)
137+ , OPTIONS (..)
138+ , PATCH (..)
139+ , HttpMethod (..)
111140 -- ** URL
112141 -- $url
113− Url,
114− http,
115− https,
116− (/~),
117− (/:),
118− useHttpURI,
119− useHttpsURI,
120− useURI,
121− urlQ,
122− renderUrl,
123−
142+ , Url
143+ , http
144+ , https
145+ , (/~)
146+ , (/:)
147+ , parseUrlHttp
148+ , parseUrlHttps
149+ , parseUrl
124150 -- ** Body
125151 -- $body
126− NoReqBody (..),
127− ReqBodyJson (..),
128− ReqBodyFile (..),
129− ReqBodyBs (..),
130− ReqBodyLbs (..),
131− ReqBodyUrlEnc (..),
132− FormUrlEncodedParam,
133− ReqBodyMultipart,
134− reqBodyMultipart,
135− HttpBody (..),
136− ProvidesBody,
137− HttpBodyAllowed,
138−
152+ , NoReqBody (..)
153+ , ReqBodyJson (..)
154+ , ReqBodyFile (..)
155+ , ReqBodyBs (..)
156+ , ReqBodyLbs (..)
157+ , ReqBodyUrlEnc (..)
158+ , FormUrlEncodedParam
159+ , ReqBodyMultipart
160+ , reqBodyMultipart
161+ , HttpBody (..)
162+ , ProvidesBody
163+ , HttpBodyAllowed
139164 -- ** Optional parameters
140165 -- $optional-parameters
141− Option,
142−
166+ , Option
143167 -- *** Query parameters
144168 -- $query-parameters
145− (=:),
146− queryFlag,
147− formToQuery,
148− QueryParam (..),
149−
169+ , (=:)
170+ , queryFlag
171+ , QueryParam (..)
150172 -- *** Headers
151− header,
152− attachHeader,
153− headerRedacted,
154−
173+ , header
174+ , attachHeader
155175 -- *** Cookies
156176 -- $cookies
157− cookieJar,
158−
177+ , cookieJar
159178 -- *** Authentication
160179 -- $authentication
161− basicAuth,
162− basicAuthUnsafe,
163− basicProxyAuth,
164− oAuth1,
165− oAuth2Bearer,
166− oAuth2Token,
167− customAuth,
168−
180+ , basicAuth
181+ , basicAuthUnsafe
182+ , basicProxyAuth
183+ , oAuth1
184+ , oAuth2Bearer
185+ , oAuth2Token
186+ , customAuth
169187 -- *** Other
170− port,
171− decompress,
172− responseTimeout,
173− httpVersion,
174−
188+ , port
189+ , decompress
190+ , responseTimeout
191+ , httpVersion
175192 -- * Response
176−
177193 -- ** Response interpretations
178− IgnoreResponse,
179− ignoreResponse,
180− JsonResponse,
181− jsonResponse,
182− BsResponse,
183− bsResponse,
184− LbsResponse,
185− lbsResponse,
186−
194+ , IgnoreResponse
195+ , ignoreResponse
196+ , JsonResponse
197+ , jsonResponse
198+ , BsResponse
199+ , bsResponse
200+ , LbsResponse
201+ , lbsResponse
187202 -- ** Inspecting a response
188− responseBody,
189− responseStatusCode,
190− responseStatusMessage,
191− responseHeader,
192− responseCookieJar,
193−
203+ , responseBody
204+ , responseStatusCode
205+ , responseStatusMessage
206+ , responseHeader
207+ , responseCookieJar
194208 -- ** Defining your own interpretation
195209 -- $new-response-interpretation
196− HttpResponse (..),
197−
210+ , HttpResponse (..)
198211 -- * Other
199− HttpException (..),
200− isStatusCodeException,
201− CanHaveBody (..),
202− Scheme (..),
203− )
212+ , HttpException (..)
213+ , CanHaveBody (..)
214+ , Scheme (..) )
204215where
205216
206−import Blaze.ByteString.Builder qualified as BB
207217import Control.Applicative
208218import Control.Arrow (first, second)
209−import Control.Exception hiding (Handler (..), TypeError)
210−import Control.Monad (guard, void, (>=>))
211219import Control.Monad.Base
212−import Control.Monad.Catch (Handler (..), MonadCatch, MonadMask, MonadThrow)
213220import 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)
221+import Control.Monad.Reader
218222import 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
231223import Control.Retry
232−import Data.Aeson (FromJSON (..), ToJSON (..))
233−import Data.Aeson qualified as A
224+import Data.Aeson (ToJSON (..), FromJSON (..))
234225import 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
238226import Data.Data (Data)
239−import Data.Default.Class (def)
227+import Data.Default.Class
240228import Data.Function (on)
241229import Data.IORef
242−import Data.Kind (Constraint, Type)
243−import Data.List (foldl', nubBy)
230+import Data.List (nubBy)
244231import Data.List.NonEmpty (NonEmpty (..))
245−import Data.List.NonEmpty qualified as NE
246232import Data.Maybe (fromMaybe)
247233import Data.Proxy
248−import Data.Semigroup (Endo (..))
249−import Data.Set qualified as S
234+import Data.Semigroup hiding (Option, option)
250235import Data.Text (Text)
251−import Data.Text qualified as T
252−import Data.Text.Encoding qualified as T
253−import Data.Typeable (Typeable, cast)
236+import Data.Typeable (Typeable)
254237import GHC.Generics
255238import 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
265239import System.IO.Unsafe (unsafePerformIO)
266−import 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
272240import Web.HttpApiData (ToHttpApiData (..))
241+import qualified Blaze.ByteString.Builder as BB
242+import qualified Data.Aeson as A
243+import qualified Data.ByteString as B
244+import qualified Data.ByteString.Lazy as BL
245+import qualified Data.CaseInsensitive as CI
246+import qualified Data.List.NonEmpty as NE
247+import qualified Data.Text as T
248+import qualified Data.Text.Encoding as T
249+import qualified Data.Text.Read as TR
250+import qualified Network.Connection as NC
251+import qualified Network.HTTP.Client as L
252+import qualified Network.HTTP.Client.Internal as LI
253+import qualified Network.HTTP.Client.MultipartFormData as LM
254+import qualified Network.HTTP.Client.TLS as L
255+import qualified Network.HTTP.Types as Y
256+import qualified Web.Authenticate.OAuth as OAuth
257+
258+#if MIN_VERSION_base(4,9,0)
259+import Control.Exception hiding (TypeError)
260+import Data.Kind (Constraint)
261+#else
262+import Control.Exception
263+import GHC.Exts (Constraint)
264+#endif
273265
274266----------------------------------------------------------------------------
275267-- Making a request
@@ -293,7 +285,7 @@ import Web.HttpApiData (ToHttpApiData (..))
293285--
294286-- @body@ is a body option such as 'NoReqBody' or 'ReqBodyJson'. The
295287-- tutorial has a section about HTTP bodies, but usage is very
296−-- straightforward and should be clear from the examples.
288+-- straightforward and should be clear from the examples below.
297289--
298290-- @response@ is a type hint how to make and interpret response of an HTTP
299291-- request. Out-of-the-box it can be the following:
@@ -319,7 +311,6 @@ import Web.HttpApiData (ToHttpApiData (..))
319311-- First, this is a piece of boilerplate that should be in place before you
320312-- try the examples:
321313--
322−-- > {-# LANGUAGE DeriveGeneric #-}
323314-- > {-# LANGUAGE OverloadedStrings #-}
324315-- >
325316-- > module Main (main) where
@@ -327,20 +318,20 @@ import Web.HttpApiData (ToHttpApiData (..))
327318-- > import Control.Monad
328319-- > import Control.Monad.IO.Class
329320-- > import Data.Aeson
321+-- > import Data.Default.Class
330322-- > import Data.Maybe (fromJust)
331323-- > import Data.Monoid ((<>))
332324-- > import Data.Text (Text)
333325-- > import GHC.Generics
334326-- > import Network.HTTP.Req
335327-- > import qualified Data.ByteString.Char8 as B
336−-- > import qualified Text.URI as URI
337328--
338329-- We will be making requests against the <https://httpbin.org> service.
339330--
340331-- Make a GET request, grab 5 random bytes:
341332--
342333-- > main :: IO ()
343−-- > main = runReq defaultHttpConfig $ do
334+-- > main = runReq def $ do
344335-- > let n :: Int
345336-- > n = 5
346337-- > bs <- req GET (https "httpbin.org" /: "bytes" /~ n) NoReqBody bsResponse mempty
@@ -350,7 +341,7 @@ import Web.HttpApiData (ToHttpApiData (..))
350341-- seed of the generator:
351342--
352343-- > main :: IO ()
353−-- > main = runReq defaultHttpConfig $ do
344+-- > main = runReq def $ do
354345-- > let n, seed :: Int
355346-- > n = 5
356347-- > seed = 100
@@ -369,7 +360,7 @@ import Web.HttpApiData (ToHttpApiData (..))
369360-- > instance FromJSON MyData
370361-- >
371362-- > main :: IO ()
372−-- > main = runReq defaultHttpConfig $ do
363+-- > main = runReq def $ do
373364-- > let myData = MyData
374365-- > { size = 6
375366-- > , color = "Green" }
@@ -379,7 +370,7 @@ import Web.HttpApiData (ToHttpApiData (..))
379370-- Sending URL-encoded body:
380371--
381372-- > main :: IO ()
382−-- > main = runReq defaultHttpConfig $ do
373+-- > main = runReq def $ do
383374-- > let params =
384375-- > "foo" =: ("bar" :: Text) <>
385376-- > queryFlag "baz"
@@ -389,11 +380,10 @@ import Web.HttpApiData (ToHttpApiData (..))
389380-- Using various optional parameters and URL that is not known in advance:
390381--
391382-- > main :: IO ()
392−-- > main = runReq defaultHttpConfig $ do
383+-- > main = runReq def $ do
393384-- > -- This is an example of what to do when URL is given dynamically. Of
394385-- > -- course in a real application you may not want to use 'fromJust'.
395−-- > uri <- URI.mkURI "https://httpbin.org/get?foo=bar"
396−-- > let (url, options) = fromJust (useHttpsURI uri)
386+-- > let (url, options) = fromJust (parseUrlHttps "https://httpbin.org/get?foo=bar")
397387-- > response <- req GET url NoReqBody jsonResponse $
398388-- > "from" =: (15 :: Int) <>
399389-- > "to" =: (67 :: Int) <>
@@ -401,138 +391,60 @@ import Web.HttpApiData (ToHttpApiData (..))
401391-- > options <> -- contains the ?foo=bar part
402392-- > port 443 -- here you can put any port of course
403393-- > liftIO $ print (responseBody response :: Value)
404−req ::
405− ( MonadHttp m,
406− HttpMethod method,
407− HttpBody body,
408− HttpResponse response,
409− HttpBodyAllowed (AllowsBody method) (ProvidesBody body)
410− ) =>
411− -- | HTTP method
412− method ->
413− -- | 'Url'—location of resource
414− Url scheme ->
415− -- | Body of the request
416− body ->
417− -- | A hint how to interpret response
418− Proxy response ->
419− -- | Collection of optional parameters
420− Option scheme ->
421− -- | Response
422− m response
423−req method url body responseProxy options =
424− reqCb method url body responseProxy options pure
394+
395+req
396+ :: ( MonadHttp m
397+ , HttpMethod method
398+ , HttpBody body
399+ , HttpResponse response
400+ , HttpBodyAllowed (AllowsBody method) (ProvidesBody body) )
401+ => method -- ^ HTTP method
402+ -> Url scheme -- ^ 'Url'—location of resource
403+ -> body -- ^ Body of the request
404+ -> Proxy response -- ^ A hint how to interpret response
405+ -> Option scheme -- ^ Collection of optional parameters
406+ -> m response -- ^ Response
407+req method url body Proxy options =
408+ reqBr method url body options getHttpResponse
425409
426410-- | A version of 'req' that does not use one of the predefined instances of
427411-- 'HttpResponse' but instead allows the user to consume @'L.Response'
428412-- 'L.BodyReader'@ manually, in a custom way.
429413--
430414-- @since 1.0.0
431−reqBr ::
432− ( MonadHttp m,
433− HttpMethod method,
434− HttpBody body,
435− HttpBodyAllowed (AllowsBody method) (ProvidesBody body)
436− ) =>
437− -- | HTTP method
438− method ->
439− -- | 'Url'—location of resource
440− Url scheme ->
441− -- | Body of the request
442− body ->
443− -- | Collection of optional parameters
444− Option scheme ->
445− -- | How to consume response
446− (L.Response L.BodyReader -> IO a) ->
447− -- | Result
448− 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
501− HttpConfig {..} <- getHttpConfig
415+
416+reqBr
417+ :: ( MonadHttp m
418+ , HttpMethod method
419+ , HttpBody body
420+ , HttpBodyAllowed (AllowsBody method) (ProvidesBody body) )
421+ => method -- ^ HTTP method
422+ -> Url scheme -- ^ 'Url'—location of resource
423+ -> body -- ^ Body of the request
424+ -> Option scheme -- ^ Collection of optional parameters
425+ -> (L.Response L.BodyReader -> IO a) -- ^ How to consume response
426+ -> m a -- ^ Result
427+reqBr method url body options consume = req' method url body options $ \request manager -> do
428+ HttpConfig {..} <- getHttpConfig
502429 let wrapVanilla = handle (throwIO . VanillaHttpException)
503− wrapExc = handle (throwIO . LI.toHttpException request)
504− withRRef =
505− bracket
506− (newIORef Nothing)
507− (readIORef >=> mapM_ L.responseClose)
508− (liftIO . try . wrapVanilla . wrapExc)
509− ( withRRef $ \rref -> do
510− let openResponse = mask_ $ do
511− r <- readIORef rref
512− mapM_ L.responseClose r
513− r' <- L.responseOpen request manager
514− writeIORef rref (Just r')
515− return r'
516− exceptionRetryPolicies =
517− skipAsyncExceptions
518− ++ [ \retryStatus -> Handler $ \e ->
519− return $ httpConfigRetryJudgeException retryStatus e
520− ]
521− r <-
522− retrying
523− httpConfigRetryPolicy
524− (\retryStatus r -> return $ httpConfigRetryJudge retryStatus r)
525− ( const
526− ( recovering
527− httpConfigRetryPolicy
528− exceptionRetryPolicies
529− (const openResponse)
530− )
531− )
532− (preview, r') <- grabPreview httpConfigBodyPreviewLength r
533− mapM_ LI.throwHttp (httpConfigCheckResponse request r' preview)
534− consume r'
535− )
430+ wrapExc = handle (throwIO . LI.toHttpException request)
431+ withRRef = bracket
432+ (newIORef Nothing)
433+ (readIORef >=> mapM_ L.responseClose)
434+ (liftIO . try . wrapVanilla . wrapExc) (withRRef $ \rref -> do
435+ let openResponse = mask_ $ do
436+ r <- readIORef rref
437+ mapM_ L.responseClose r
438+ r' <- L.responseOpen request manager
439+ writeIORef rref (Just r')
440+ return r'
441+ r <- retrying
442+ httpConfigRetryPolicy
443+ (\st r -> return $ httpConfigRetryJudge st r)
444+ (const openResponse)
445+ (preview, r') <- grabPreview bodyPreviewLength r
446+ mapM_ LI.throwHttp (httpConfigCheckResponse request r' preview)
447+ consume r')
536448 >>= either handleHttpException return
537449
538450-- | Mostly like 'req' with respect to its arguments, but accepts a callback
@@ -543,57 +455,51 @@ reqHandler consume request manager = do
543455-- 'L.Request' and allows you to use it.
544456--
545457-- @since 0.3.0
546−req' ::
547− forall m method body scheme a.
548− ( MonadHttp m,
549− HttpMethod method,
550− HttpBody body,
551− HttpBodyAllowed (AllowsBody method) (ProvidesBody body)
552− ) =>
553− -- | HTTP method
554− method ->
555− -- | 'Url'—location of resource
556− Url scheme ->
557− -- | Body of the request
558− body ->
559− -- | Collection of optional parameters
560− Option scheme ->
561− -- | How to perform request
562− (L.Request -> L.Manager -> m a) ->
563− -- | Result
564− m a
458+
459+req'
460+ :: forall m method body scheme a.
461+ ( MonadHttp m
462+ , HttpMethod method
463+ , HttpBody body
464+ , HttpBodyAllowed (AllowsBody method) (ProvidesBody body) )
465+ => method -- ^ HTTP method
466+ -> Url scheme -- ^ 'Url'—location of resource
467+ -> body -- ^ Body of the request
468+ -> Option scheme -- ^ Collection of optional parameters
469+ -> (L.Request -> L.Manager -> m a) -- ^ How to perform request
470+ -> m a -- ^ Result
565471req' method url body options m = do
566− config <- getHttpConfig
472+ config@HttpConfig {..} <- getHttpConfig
567473 let -- NOTE First appearance of any given header wins. This allows to
568474 -- “overwrite” headers when we construct a request by cons-ing.
569475 nubHeaders = Endo $ \x ->
570− x {L.requestHeaders = nubBy ((==) `on` fst) (L.requestHeaders x)}
571− request' =
572− flip appEndo L.defaultRequest $
573− -- NOTE The order of 'mappend's matters, here method is overwritten
574− -- first and 'options' take effect last. In particular, this means
575− -- that 'options' can overwrite things set by other request
576− -- components, which is useful for setting port number,
577− -- "Content-Type" header, etc.
578− nubHeaders
579− <> getRequestMod options
580− <> getRequestMod config
581− <> getRequestMod (Tagged body :: Tagged "body" body)
582− <> getRequestMod url
583− <> getRequestMod (Tagged method :: Tagged "method" method)
476+ x { L.requestHeaders = nubBy ((==) `on` fst) (L.requestHeaders x) }
477+ request' = flip appEndo L.defaultRequest $
478+ -- NOTE The order of 'mappend's matters, here method is overwritten
479+ -- first and 'options' take effect last. In particular, this means
480+ -- that 'options' can overwrite things set by other request
481+ -- components, which is useful for setting port number,
482+ -- "Content-Type" header, etc.
483+ nubHeaders <>
484+ getRequestMod options <>
485+ getRequestMod config <>
486+ getRequestMod (Womb body :: Womb "body" body) <>
487+ getRequestMod url <>
488+ getRequestMod (Womb method :: Womb "method" method)
584489 request <- finalizeRequest options request'
585490 withReqManager (m request)
586491
587492-- | 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
493+-- of the library uses. This allows to reuse connections that the
589494-- 'L.Manager' controls.
590−withReqManager :: (MonadIO m) => (L.Manager -> m a) -> m a
591−withReqManager m = m globalManager
592495
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'.
496+withReqManager :: MonadIO m => (L.Manager -> m a) -> m a
497+withReqManager m = liftIO (readIORef globalManager) >>= m
498+
499+-- | Global 'L.Manager' that 'req' uses. Here we just go with the default
500+-- settings, so users don't need to deal with this manager stuff at all, but
501+-- when we create a request, instance 'HttpConfig' can affect the default
502+-- settings via 'getHttpConfig'.
597503--
598504-- A note about safety, in case 'unsafePerformIO' looks suspicious to you.
599505-- The value of 'globalManager' is named and lives on top level. This means
@@ -601,20 +507,17 @@ withReqManager m = m globalManager
601507-- manager. From that moment on the 'IORef' will be just reused—exactly the
602508-- behavior we want here in order to maximize connection sharing. GHC could
603509-- spoil the plan by inlining the definition, hence the @NOINLINE@ pragma.
604−globalManager :: L.Manager
510+
511+globalManager :: IORef L.Manager
605512globalManager = unsafePerformIO $ do
606513 context <- NC.initConnectionContext
607− let settings =
608− L.mkManagerSettingsContext
609− (Just context)
610− def
611− Nothing
514+ let settings = L.mkManagerSettingsContext (Just context) def Nothing
612515 manager <- L.newManager settings
613− return manager
516+ newIORef manager
614517{-# NOINLINE globalManager #-}
615518
616519----------------------------------------------------------------------------
617−-- Embedding requests in your monad
520+-- Embedding requests into your monad
618521
619522-- $embedding-requests
620523--
@@ -623,44 +526,56 @@ globalManager = unsafePerformIO $ do
623526--
624527-- When writing a library, keep your API polymorphic in terms of
625528-- 'MonadHttp', only define instance of 'MonadHttp' in final application.
626−-- 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).
529+-- Another option is to use @newtype@ wrapped monad stack and define
530+-- 'MonadHttp' for it. As of version /0.4.0/, the 'Req' monad that follows
531+-- this strategy is provided out-of-the-box (see below).
629532
630533-- | A type class for monads that support performing HTTP requests.
631534-- Typically, you only need to define the 'handleHttpException' method
632535-- unless you want to tweak 'HttpConfig'.
633−class (MonadIO m) => MonadHttp m where
536+
537+class MonadIO m => MonadHttp m where
538+
634539 -- | This method describes how to deal with 'HttpException' that was
635540 -- caught by the library. One option is to re-throw it if you are OK with
636541 -- exceptions, but if you prefer working with something like
637542 -- 'Control.Monad.Except.MonadError', this is the right place to pass it to
638543 -- 'Control.Monad.Except.throwError'.
544+
639545 handleHttpException :: HttpException -> m a
640546
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
547+ -- | Return 'HttpConfig' to be used when performing HTTP requests. Default
548+ -- implementation returns its 'def' value, which is described in the
549+ -- documentation for the type. Common usage pattern with manually defined
550+ -- 'getHttpConfig' is to return some hard-coded value, or a value
645551 -- extracted from 'Control.Monad.Reader.MonadReader' if a more flexible
646552 -- approach to configuration is desirable.
553+
647554 getHttpConfig :: m HttpConfig
648− getHttpConfig = return defaultHttpConfig
555+ getHttpConfig = return def
556+
557+-- | 'HttpConfig' contains general and default settings to be used when
558+-- making HTTP requests.
649559
650−-- | 'HttpConfig' contains settings to be used when making HTTP requests.
651560data HttpConfig = HttpConfig
652− { -- | Proxy to use. By default values of @HTTP_PROXY@ and @HTTPS_PROXY@
561+ { httpConfigProxy :: Maybe L.Proxy
562+ -- ^ Proxy to use. By default values of @HTTP_PROXY@ and @HTTPS_PROXY@
653563 -- environment variables are respected, this setting overwrites them.
654564 -- Default value: 'Nothing'.
655− httpConfigProxy :: Maybe L.Proxy,
656− -- | How many redirects to follow when getting a resource. Default
565+ , httpConfigRedirectCount :: Int
566+ -- ^ How many redirects to follow when getting a resource. Default
657567 -- value: 10.
658− httpConfigRedirectCount :: Int,
659− -- | Alternative 'L.Manager' to use. 'Nothing' (default value) means
568+ , httpConfigAltManager :: Maybe L.Manager
569+ -- ^ Alternative 'L.Manager' to use. 'Nothing' (default value) means
660570 -- that the default implicit manager will be used (that's what you want
661571 -- in 99% of cases).
662− httpConfigAltManager :: Maybe L.Manager,
663− -- | Function to check the response immediately after receiving the
572+ , httpConfigCheckResponse
573+ :: forall b.
574+ L.Request
575+ -> L.Response b
576+ -> ByteString
577+ -> Maybe L.HttpExceptionContent
578+ -- ^ Function to check the response immediately after receiving the
664579 -- status and headers, before streaming of response body. The third
665580 -- argument is the beginning of response body (typically first 1024
666581 -- bytes). This is used for throwing exceptions on non-success status
@@ -682,106 +597,63 @@ data HttpConfig = HttpConfig
682597 -- /1.0.0/.
683598 --
684599 -- @since 0.3.0
685− httpConfigCheckResponse ::
686− forall b.
687− L.Request ->
688− L.Response b ->
689− ByteString ->
690− Maybe L.HttpExceptionContent,
691− -- | The retry policy to use for request retrying. By default 'def' is
600+ , httpConfigRetryPolicy :: RetryPolicy
601+ -- ^ The retry policy to use for request retrying. By default 'def' is
692602 -- used (see 'RetryPolicyM').
693603 --
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/.
604+ -- __Note__: signature of this function was changed in the version
605+ -- /1.0.0/.
696606 --
697607 -- @since 0.3.0
698− httpConfigRetryPolicy :: RetryPolicyM IO,
699− -- | The function is used to decide whether to retry a request. 'True'
608+ , httpConfigRetryJudge :: forall b. RetryStatus -> L.Response b -> Bool
609+ -- ^ The function is used to decide whether to retry a request. 'True'
700610 -- means that the request should be retried.
701611 --
702612 -- __Note__: signature of this function was changed in the version
703613 -- /1.0.0/.
704614 --
705615 -- @since 0.3.0
706− httpConfigRetryJudge :: forall b. RetryStatus -> L.Response b -> Bool,
707− -- | 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/).
711− --
712− -- @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
718− }
719−
720−-- | The default value of 'HttpConfig'.
721−--
722−-- @since 2.0.0
723−defaultHttpConfig :: HttpConfig
724−defaultHttpConfig =
725− HttpConfig
726− { httpConfigProxy = Nothing,
727− httpConfigRedirectCount = 10,
728− httpConfigAltManager = Nothing,
729− httpConfigCheckResponse = \_ response preview ->
616+ } deriving Typeable
617+
618+instance Default HttpConfig where
619+ def = HttpConfig
620+ { httpConfigProxy = Nothing
621+ , httpConfigRedirectCount = 10
622+ , httpConfigAltManager = Nothing
623+ , httpConfigCheckResponse = \_ response preview ->
730624 let scode = statusCode response
731− in if 200 <= scode && scode < 300
732− then Nothing
733− else Just (L.StatusCodeException (void response) preview),
734− httpConfigRetryPolicy = retryPolicyDefault,
735− httpConfigRetryJudge = \_ response ->
736− statusCode response
737− `elem` [ 408, -- Request timeout
738− 504, -- Gateway timeout
739− 524, -- A timeout occurred
740− 598, -- (Informal convention) Network read timeout error
741− 599 -- (Informal convention) Network connect timeout error
742− ],
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
625+ in if 200 <= scode && scode < 300
626+ then Nothing
627+ else Just (L.StatusCodeException (void response) preview)
628+ , httpConfigRetryPolicy = def
629+ , httpConfigRetryJudge = \_ response ->
630+ statusCode response `elem`
631+ [ 408 -- Request timeout
632+ , 504 -- Gateway timeout
633+ , 524 -- A timeout occurred
634+ , 598 -- (Informal convention) Network read timeout error
635+ , 599 -- (Informal convention) Network connect timeout error
636+ ]
752637 }
753− where
754− statusCode = Y.statusCode . L.responseStatus
638+ where
639+ statusCode = Y.statusCode . L.responseStatus
755640
756641instance RequestComponent HttpConfig where
757642 getRequestMod HttpConfig {..} = Endo $ \x ->
758− x
759− { L.proxy = httpConfigProxy,
760− L.redirectCount = httpConfigRedirectCount,
761− LI.requestManagerOverride = httpConfigAltManager
762− }
643+ x { L.proxy = httpConfigProxy
644+ , L.redirectCount = httpConfigRedirectCount
645+ , LI.requestManagerOverride = httpConfigAltManager }
763646
764−-- | A monad that allows us to run 'req' in any 'IO'-enabled monad without
647+-- | A monad that allows to run 'req' in any 'IO'-enabled monad without
765648-- having to define new instances.
766649--
767650-- @since 0.4.0
768−newtype Req a = Req (ReaderT HttpConfig IO a)
769− deriving
770− ( Functor,
771− Applicative,
772− Monad,
773− MonadIO,
774− MonadUnliftIO
775− )
776−
777−-- | @since 3.7.0
778−deriving instance MonadThrow Req
779−
780−-- | @since 3.7.0
781−deriving instance MonadCatch Req
782651
783−-- | @since 3.7.0
784−deriving instance MonadMask Req
652+newtype Req a = Req (ReaderT HttpConfig IO a)
653+ deriving ( Functor
654+ , Applicative
655+ , Monad
656+ , MonadIO )
785657
786658instance MonadBase IO Req where
787659 liftBase = liftIO
@@ -790,99 +662,22 @@ instance MonadBaseControl IO Req where
790662 type StM Req a = a
791663 liftBaseWith f = Req . ReaderT $ \r -> f (runReq r)
792664 {-# INLINEABLE liftBaseWith #-}
793− restoreM = Req . ReaderT . const . return
665+ restoreM = Req . ReaderT . const . return
794666 {-# INLINEABLE restoreM #-}
795667
796668instance MonadHttp Req where
797669 handleHttpException = Req . lift . throwIO
798− getHttpConfig = Req ask
799−
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
670+ getHttpConfig = Req ask
874671
875672-- | Run a computation in the 'Req' monad with the given 'HttpConfig'. In
876−-- the case of an exceptional situation an 'HttpException' will be thrown.
673+-- case of exceptional situation an 'HttpException' will be thrown.
877674--
878675-- @since 0.4.0
879−runReq ::
880− (MonadIO m) =>
881− -- | 'HttpConfig' to use
882− HttpConfig ->
883− -- | Computation to run
884− Req a ->
885− m a
676+
677+runReq :: MonadIO m
678+ => HttpConfig -- ^ 'HttpConfig' to use
679+ -> Req a -- ^ Computation to run
680+ -> m a
886681runReq config (Req m) = liftIO (runReaderT m config)
887682
888683----------------------------------------------------------------------------
@@ -898,6 +693,7 @@ runReq config (Req m) = liftIO (runReaderT m config)
898693-- define a new method that will works seamlessly, see 'HttpMethod'.
899694
900695-- | 'GET' method.
696+
901697data GET = GET
902698
903699instance HttpMethod GET where
@@ -905,6 +701,7 @@ instance HttpMethod GET where
905701 httpMethodName Proxy = Y.methodGet
906702
907703-- | 'POST' method.
704+
908705data POST = POST
909706
910707instance HttpMethod POST where
@@ -912,6 +709,7 @@ instance HttpMethod POST where
912709 httpMethodName Proxy = Y.methodPost
913710
914711-- | 'HEAD' method.
712+
915713data HEAD = HEAD
916714
917715instance HttpMethod HEAD where
@@ -919,24 +717,26 @@ instance HttpMethod HEAD where
919717 httpMethodName Proxy = Y.methodHead
920718
921719-- | 'PUT' method.
720+
922721data PUT = PUT
923722
924723instance HttpMethod PUT where
925724 type AllowsBody PUT = 'CanHaveBody
926725 httpMethodName Proxy = Y.methodPut
927726
928−-- | 'DELETE' method. RFC 7231 allows a payload in DELETE but without
929−-- semantics.
930−--
931−-- __Note__: before version /3.4.0/ this method did not allow request
932−-- bodies.
727+-- | 'DELETE' method. This data type does not allow having request body with
728+-- 'DELETE' requests, as it should be. However some APIs may expect 'DELETE'
729+-- requests to have bodies, in that case define your own variation of
730+-- 'DELETE' method and allow it to have a body.
731+
933732data DELETE = DELETE
934733
935734instance HttpMethod DELETE where
936− type AllowsBody DELETE = 'CanHaveBody
735+ type AllowsBody DELETE = 'NoBody
937736 httpMethodName Proxy = Y.methodDelete
938737
939738-- | 'TRACE' method.
739+
940740data TRACE = TRACE
941741
942742instance HttpMethod TRACE where
@@ -944,6 +744,7 @@ instance HttpMethod TRACE where
944744 httpMethodName Proxy = Y.methodTrace
945745
946746-- | 'CONNECT' method.
747+
947748data CONNECT = CONNECT
948749
949750instance HttpMethod CONNECT where
@@ -951,6 +752,7 @@ instance HttpMethod CONNECT where
951752 httpMethodName Proxy = Y.methodConnect
952753
953754-- | 'OPTIONS' method.
755+
954756data OPTIONS = OPTIONS
955757
956758instance HttpMethod OPTIONS where
@@ -958,6 +760,7 @@ instance HttpMethod OPTIONS where
958760 httpMethodName Proxy = Y.methodOptions
959761
960762-- | 'PATCH' method.
763+
961764data PATCH = PATCH
962765
963766instance HttpMethod PATCH where
@@ -972,19 +775,23 @@ instance HttpMethod PATCH where
972775-- > instance HttpMethod COPY where
973776-- > type AllowsBody COPY = 'CanHaveBody
974777-- > httpMethodName Proxy = "COPY"
778+
975779class HttpMethod a where
780+
976781 -- | Type function 'AllowsBody' returns a type of kind 'CanHaveBody' which
977− -- tells the rest of the library whether the method can have body or not.
978− -- We use the special type 'CanHaveBody' lifted to the kind level instead
979− -- of 'Bool' to get more user-friendly compiler messages.
782+ -- tells the rest of the library whether the method can have a body or
783+ -- not. We use the special type 'CanHaveBody' lifted to the kind level
784+ -- instead of 'Bool' to get more user-friendly compiler messages.
785+
980786 type AllowsBody a :: CanHaveBody
981787
982788 -- | Return name of the method as a 'ByteString'.
789+
983790 httpMethodName :: Proxy a -> ByteString
984791
985−instance (HttpMethod method) => RequestComponent (Tagged "method" method) where
792+instance HttpMethod method => RequestComponent (Womb "method" method) where
986793 getRequestMod _ = Endo $ \x ->
987− x {L.method = httpMethodName (Proxy :: Proxy method)}
794+ x { L.method = httpMethodName (Proxy :: Proxy method) }
988795
989796----------------------------------------------------------------------------
990797-- Request—URL
@@ -992,7 +799,8 @@ instance (HttpMethod method) => RequestComponent (Tagged "method" method) where
992799-- $url
993800--
994801-- We use 'Url's which are correct by construction, see 'Url'. To build a
995−-- 'Url' from a 'URI', use 'useHttpURI', 'useHttpsURI', or generic 'useURI'.
802+-- 'Url' from a 'ByteString', use 'parseUrlHttp', 'parseUrlHttps', or
803+-- generic 'parseUrl'.
996804
997805-- | Request's 'Url'. Start constructing your 'Url' with 'http' or 'https'
998806-- specifying the scheme and host at the same time. Then use the @('/~')@
@@ -1022,194 +830,101 @@ instance (HttpMethod method) => RequestComponent (Tagged "method" method) where
1022830--
1023831-- > https "юникод.рф"
1024832-- > -- https://%D1%8E%D0%BD%D0%B8%D0%BA%D0%BE%D0%B4.%D1%80%D1%84
833+
1025834data Url (scheme :: Scheme) = Url Scheme (NonEmpty Text)
1026835 -- NOTE The second value is the path segments in reversed order.
1027− deriving (Eq, Ord, Show, Data, Generic)
1028−
1029−type role Url nominal
1030−
1031−-- With template-haskell >=2.15 and text >=1.2.4 Lift can be derived, however
1032−-- the derived lift forgets the type of the scheme.
1033−instance (Typeable scheme) => TH.Lift (Url scheme) where
1034− lift url =
1035− TH.dataToExpQ (fmap liftText . cast) url `TH.sigE` case url of
1036− Url Http _ -> [t|Url 'Http|]
1037− Url Https _ -> [t|Url 'Https|]
1038− where
1039− liftText t = TH.AppE (TH.VarE 'T.pack) <$> TH.lift (T.unpack t)
1040− liftTyped = TH.Code . TH.unsafeTExpCoerce . TH.lift
836+ deriving (Eq, Ord, Show, Data, Typeable, Generic)
1041837
1042−-- | Given host name, produce a 'Url' which has “http” as its scheme and
838+-- | Given host name, produce a 'Url' which have “http” as its scheme and
1043839-- empty path. This also sets port to @80@.
840+
1044841http :: Text -> Url 'Http
1045842http = Url Http . pure
1046843
1047−-- | Given host name, produce a 'Url' which has “https” as its scheme and
844+-- | Given host name, produce a 'Url' which have “https” as its scheme and
1048845-- empty path. This also sets port to @443@.
846+
1049847https :: Text -> Url 'Https
1050848https = Url Https . pure
1051849
1052−-- | Grow a given 'Url' appending a single path segment to it. Note that the
850+-- | Grow given 'Url' appending a single path segment to it. Note that the
1053851-- path segment can be of any type that is an instance of 'ToHttpApiData'.
1054−infixl 5 /~
1055852
1056−(/~) :: (ToHttpApiData a) => Url scheme -> a -> Url scheme
853+infixl 5 /~
854+(/~) :: ToHttpApiData a => Url scheme -> a -> Url scheme
1057855Url secure path /~ segment = Url secure (NE.cons (toUrlPiece segment) path)
1058856
1059−-- | A type-constrained version of @('/~')@ to remove ambiguity in the cases
1060−-- when next URL piece is a 'Data.Text.Text' literal.
1061−infixl 5 /:
857+-- | Type-constrained version of @('/~')@ to remove ambiguity in the cases
858+-- when next URL piece is a 'Text' literal.
1062859
860+infixl 5 /:
1063861(/:) :: Url scheme -> Text -> Url scheme
1064862(/:) = (/~)
1065863
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−
1079−-- | The 'useHttpURI' function provides an alternative method to get 'Url'
1080−-- (possibly with some 'Option's) from a 'URI'. This is useful when you are
1081−-- given a URL to query dynamically and don't know it beforehand.
1082−--
1083−-- This function expects the scheme to be “http” and host to be present.
1084−--
1085−-- @since 3.0.0
1086−useHttpURI :: URI -> Maybe (Url 'Http, Option scheme)
1087−useHttpURI uri = do
1088− guard (URI.uriScheme uri == Just [QQ.scheme|http|])
1089− urlHead <- http <$> uriHost uri
1090− let url = case URI.uriPath uri of
1091− Nothing -> urlHead
1092− Just uriPath -> uriPathToUrl uriPath urlHead
1093− return (url, uriOptions uri)
1094−
1095−-- | Just like 'useHttpURI', but expects the “https” scheme.
1096−--
1097−-- @since 3.0.0
1098−useHttpsURI :: URI -> Maybe (Url 'Https, Option scheme)
1099−useHttpsURI uri = do
1100− guard (URI.uriScheme uri == Just [QQ.scheme|https|])
1101− urlHead <- https <$> uriHost uri
1102− let url = case URI.uriPath uri of
1103− Nothing -> urlHead
1104− Just uriPath -> uriPathToUrl uriPath urlHead
1105− return (url, uriOptions uri)
1106−
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 <$> NE.toList xs)
1118−
1119−-- | A combination of 'useHttpURI' and 'useHttpsURI' for cases when scheme
1120−-- is not known in advance.
1121−--
1122−-- @since 3.0.0
1123−useURI ::
1124− URI ->
1125− Maybe
1126− ( Either
1127− (Url 'Http, Option scheme0)
1128− (Url 'Https, Option scheme1)
1129− )
1130−useURI uri =
1131− (Left <$> useHttpURI uri) <|> (Right <$> useHttpsURI uri)
1132−
1133−-- | An internal helper function to extract host from a 'URI'.
1134−uriHost :: URI -> Maybe Text
1135−uriHost uri = case URI.uriAuthority uri of
1136− Left _ -> Nothing
1137− Right URI.Authority {..} ->
1138− Just (URI.unRText authHost)
1139−
1140−-- | A quasiquoter to build an 'Url' and 'Option' tuple. The type of the
1141−-- generated expression is @('Url' scheme0, 'Option' scheme1)@ with
1142−-- @scheme0@ being either 'Http' or 'Https' depending on the input.
1143−--
1144−-- @since 3.2.0
1145−urlQ :: TH.QuasiQuoter
1146−urlQ =
1147− TH.QuasiQuoter
1148− { quoteExp = \str ->
1149− case URI.mkURI (T.pack str) of
1150− Left err -> fail (displayException err)
1151− Right uri -> case useURI uri of
1152− Nothing -> fail "Not a HTTP or HTTPS URL"
1153− Just eurl ->
1154− TH.tupE
1155− [ either (TH.lift . fst) (TH.lift . fst) eurl,
1156− [|uriOptions uri|]
1157− ],
1158− quotePat = error "This usage is not supported",
1159− quoteType = error "This usage is not supported",
1160− quoteDec = error "This usage is not supported"
1161− }
1162−
1163−-- | An internal helper function to extract 'Option's from a 'URI'.
1164−uriOptions :: forall scheme. URI -> Option scheme
1165−uriOptions uri =
1166− mconcat
1167− [ auth,
1168− query,
1169− port'
1170− -- , fragment'
1171− ]
1172− where
1173− (auth, port') =
1174− case URI.uriAuthority uri of
1175− Left _ -> (mempty, mempty)
1176− Right URI.Authority {..} ->
1177− let auth0 = case authUserInfo of
1178− Nothing -> mempty
1179− Just URI.UserInfo {..} ->
1180− let username = T.encodeUtf8 (URI.unRText uiUsername)
1181− password = maybe "" (T.encodeUtf8 . URI.unRText) uiPassword
1182− in basicAuthUnsafe username password
1183− port0 = case authPort of
1184− Nothing -> mempty
1185− Just port'' -> port (fromIntegral port'')
1186− in (auth0, port0)
1187− query =
1188− let liftQueryParam = \case
1189− URI.QueryFlag t -> queryFlag (URI.unRText t)
1190− URI.QueryParam k v -> URI.unRText k =: URI.unRText v
1191− in mconcat (liftQueryParam <$> URI.uriQuery uri)
1192−
1193−-- TODO Blocked on upstream: https://github.com/snoyberg/http-client/issues/424
1194−-- fragment' =
1195−-- case URI.uriFragment uri of
1196−-- Nothing -> mempty
1197−-- Just fragment'' -> fragment (URI.unRText fragment'')
864+-- | The 'parseUrlHttp' function provides an alternative method to get 'Url'
865+-- (possibly with some 'Option's) from a 'ByteString'. This is useful when
866+-- you are given a URL to query dynamically and don't know it beforehand.
867+-- The function parses 'ByteString' because it's the correct type to
868+-- represent a URL, as 'Url' cannot contain characters outside of ASCII
869+-- range, thus we can consider every character a 'Data.Word.Word8' value.
870+--
871+-- This function only parses 'Url' (scheme, host, path) and optional query
872+-- parameters that are returned as 'Option'. It does not parse method name
873+-- or authentication info from given 'ByteString'.
874+
875+parseUrlHttp :: ByteString -> Maybe (Url 'Http, Option scheme)
876+parseUrlHttp url' = do
877+ url <- B.stripPrefix "http://" url'
878+ (host :| path, option) <- parseUrlHelper url
879+ return (foldl (/:) (http host) path, option)
880+
881+-- | Just like 'parseUrlHttp', but expects “https” scheme.
882+
883+parseUrlHttps :: ByteString -> Maybe (Url 'Https, Option scheme)
884+parseUrlHttps url' = do
885+ url <- B.stripPrefix "https://" url'
886+ (host :| path, option) <- parseUrlHelper url
887+ return (foldl (/:) (https host) path, option)
888+
889+-- | A more general URI parsing function that can be used when scheme is not
890+-- known beforehand.
891+--
892+-- @since 1.2.1
893+
894+parseUrl
895+ :: ByteString
896+ -> Maybe (Either (Url 'Http, Option scheme0) (Url 'Https, Option scheme1))
897+parseUrl url = Left <$> parseUrlHttp url <|> Right <$> parseUrlHttps url
898+
899+-- | Get host\/collection of path pieces and possibly query parameters
900+-- already converted to 'Option'. This function is not public.
901+
902+parseUrlHelper :: ByteString -> Maybe (NonEmpty Text, Option scheme)
903+parseUrlHelper url = do
904+ let (path', query') = B.break (== 0x3f) url
905+ query = mconcat (uncurry queryParam <$> Y.parseQueryText query')
906+ p' :| ps <- NE.nonEmpty (Y.decodePathSegments path')
907+ (p, port') <-
908+ case T.break (== ':') p' of
909+ (x, "") -> return (x, mempty)
910+ (x, prt) ->
911+ case TR.decimal (T.drop 1 prt) of
912+ Right (prt',"") -> return (x, port prt')
913+ _ -> Nothing
914+ return (p :| ps, query <> port')
1198915
1199916instance RequestComponent (Url scheme) where
1200917 getRequestMod (Url scheme segments) = Endo $ \x ->
1201− let (host :| path) = NE.reverse segments
1202− in x
1203− { L.secure = case scheme of
1204− Http -> False
1205− Https -> True,
1206− L.port = case scheme of
1207− Http -> 80
1208− Https -> 443,
1209− L.host = Y.urlEncode False (T.encodeUtf8 host),
1210− L.path =
1211− (BL.toStrict . BB.toLazyByteString . Y.encodePathSegments) path
1212− }
918+ let (host :| path) = NE.reverse segments in
919+ x { L.secure = case scheme of
920+ Http -> False
921+ Https -> True
922+ , L.port = case scheme of
923+ Http -> 80
924+ Https -> 443
925+ , L.host = Y.urlEncode False (T.encodeUtf8 host)
926+ , L.path =
927+ (BL.toStrict . BB.toLazyByteString . Y.encodePathSegments) path }
1213928
1214929----------------------------------------------------------------------------
1215930-- Request—Body
@@ -1218,37 +933,39 @@ instance RequestComponent (Url scheme) where
1218933--
1219934-- A number of options for request bodies are available. The @Content-Type@
1220935-- header is set for you automatically according to the body option you use
1221−-- (it's always specified in the documentation for a given body option). To
1222−-- add your own way to represent request body, define an instance of
1223−-- 'HttpBody'.
936+-- (it's always specified in documentation for a given body option). To add
937+-- your own way to represent request body, define an instance of 'HttpBody'.
1224938
1225939-- | This data type represents empty body of an HTTP request. This is the
1226940-- data type to use with 'HttpMethod's that cannot have a body, as it's the
1227941-- only type for which 'ProvidesBody' returns 'NoBody'.
1228942--
1229943-- Using of this body option does not set the @Content-Type@ header.
944+
1230945data NoReqBody = NoReqBody
1231946
1232947instance HttpBody NoReqBody where
1233948 getRequestBody NoReqBody = L.RequestBodyBS B.empty
1234949
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.
950+-- | This body option allows to use a JSON object as request body—probably
951+-- the most popular format right now. Just wrap a data type that is an
952+-- instance of 'ToJSON' type class and you are done: it will be converted to
953+-- JSON and inserted as request body.
1239954--
1240955-- This body option sets the @Content-Type@ header to @\"application/json;
1241956-- charset=utf-8\"@ value.
957+
1242958newtype ReqBodyJson a = ReqBodyJson a
1243959
1244−instance (ToJSON a) => HttpBody (ReqBodyJson a) where
960+instance ToJSON a => HttpBody (ReqBodyJson a) where
1245961 getRequestBody (ReqBodyJson a) = L.RequestBodyLBS (A.encode a)
1246962 getRequestContentType _ = pure "application/json; charset=utf-8"
1247963
1248964-- | This body option streams request body from a file. It is expected that
1249−-- the file size does not change during streaming.
965+-- the file size does not change during the streaming.
1250966--
1251967-- Using of this body option does not set the @Content-Type@ header.
968+
1252969newtype ReqBodyFile = ReqBodyFile FilePath
1253970
1254971instance HttpBody ReqBodyFile where
@@ -1258,6 +975,7 @@ instance HttpBody ReqBodyFile where
1258975-- | HTTP request body represented by a strict 'ByteString'.
1259976--
1260977-- Using of this body option does not set the @Content-Type@ header.
978+
1261979newtype ReqBodyBs = ReqBodyBs ByteString
1262980
1263981instance HttpBody ReqBodyBs where
@@ -1266,19 +984,22 @@ instance HttpBody ReqBodyBs where
1266984-- | HTTP request body represented by a lazy 'BL.ByteString'.
1267985--
1268986-- Using of this body option does not set the @Content-Type@ header.
987+
1269988newtype ReqBodyLbs = ReqBodyLbs BL.ByteString
1270989
1271990instance HttpBody ReqBodyLbs where
1272991 getRequestBody (ReqBodyLbs bs) = L.RequestBodyLBS bs
1273992
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'.
993+-- | Form URL-encoded body. This can hold a collection of parameters which
994+-- are encoded similarly to query parameters at the end of query string,
995+-- with the only difference that they are stored in request body. The
996+-- similarity is reflected in the API as well, as you can use the same
997+-- combinators you would use to add query parameters: @('=:')@ and
998+-- 'queryFlag'.
1279999--
12801000-- This body option sets the @Content-Type@ header to
12811001-- @\"application/x-www-form-urlencoded\"@ value.
1002+
12821003newtype ReqBodyUrlEnc = ReqBodyUrlEnc FormUrlEncodedParam
12831004
12841005instance HttpBody ReqBodyUrlEnc where
@@ -1288,19 +1009,13 @@ instance HttpBody ReqBodyUrlEnc where
12881009
12891010-- | An opaque monoidal value that allows to collect URL-encoded parameters
12901011-- to be wrapped in 'ReqBodyUrlEnc'.
1012+
12911013newtype FormUrlEncodedParam = FormUrlEncodedParam [(Text, Maybe Text)]
12921014 deriving (Semigroup, Monoid)
12931015
12941016instance QueryParam FormUrlEncodedParam where
12951017 queryParam name mvalue =
12961018 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
13041019
13051020-- | Multipart form data. Please consult the
13061021-- "Network.HTTP.Client.MultipartFormData" module for how to construct
@@ -1330,6 +1045,7 @@ instance FromForm FormUrlEncodedParam where
13301045-- > bsResponse
13311046-- > mempty
13321047-- > liftIO $ print (responseBody response)
1048+
13331049data ReqBodyMultipart = ReqBodyMultipart ByteString LI.RequestBody
13341050
13351051instance HttpBody ReqBodyMultipart where
@@ -1340,64 +1056,70 @@ instance HttpBody ReqBodyMultipart where
13401056-- | Create 'ReqBodyMultipart' request body from a collection of 'LM.Part's.
13411057--
13421058-- @since 0.2.0
1343−reqBodyMultipart :: (MonadIO m) => [LM.Part] -> m ReqBodyMultipart
1059+
1060+reqBodyMultipart :: MonadIO m => [LM.Part] -> m ReqBodyMultipart
13441061reqBodyMultipart parts = liftIO $ do
13451062 boundary <- LM.webkitBoundary
1346− body <- LM.renderParts boundary parts
1063+ body <- LM.renderParts boundary parts
13471064 return (ReqBodyMultipart boundary body)
13481065
13491066-- | A type class for things that can be interpreted as an HTTP
13501067-- 'L.RequestBody'.
1068+
13511069class HttpBody body where
1070+
13521071 -- | How to get actual 'L.RequestBody'.
1072+
13531073 getRequestBody :: body -> L.RequestBody
13541074
1355− -- | This method allows us to optionally specify the value of
1356− -- @Content-Type@ header that should be used with particular body option.
1357− -- By default it returns 'Nothing' and so @Content-Type@ is not set.
1075+ -- | This method allows to optionally specify value of @Content-Type@
1076+ -- header that should be used with particular body option. By default it
1077+ -- returns 'Nothing' and so @Content-Type@ is not set.
1078+
13581079 getRequestContentType :: body -> Maybe ByteString
13591080 getRequestContentType = const Nothing
13601081
13611082-- | The type function recognizes 'NoReqBody' as having 'NoBody', while any
1362−-- other body option 'CanHaveBody'. This forces the user to use 'NoReqBody'
1363−-- with 'GET' method and other methods that should not have body.
1083+-- other body option 'CanHaveBody'. This forces user to use 'NoReqBody' with
1084+-- 'GET' method and other methods that should not send a body.
1085+
13641086type family ProvidesBody body :: CanHaveBody where
13651087 ProvidesBody NoReqBody = 'NoBody
1366− ProvidesBody body = 'CanHaveBody
1088+ ProvidesBody body = 'CanHaveBody
13671089
13681090-- | This type function allows any HTTP body if method says it
13691091-- 'CanHaveBody'. When the method says it should have 'NoBody', the only
13701092-- body option to use is 'NoReqBody'.
1371−type family
1372− HttpBodyAllowed
1373− (allowsBody :: CanHaveBody)
1374− (providesBody :: CanHaveBody) ::
1375− Constraint
1376− where
1377− HttpBodyAllowed 'NoBody 'NoBody = ()
1378− HttpBodyAllowed 'CanHaveBody body = ()
1379− HttpBodyAllowed 'NoBody 'CanHaveBody =
1380− TypeError
1381− ('Text "This HTTP method does not allow attaching a request body.")
1382−
1383−instance (HttpBody body) => RequestComponent (Tagged "body" body) where
1384− getRequestMod (Tagged body) = Endo $ \x ->
1385− x
1386− { L.requestBody = getRequestBody body,
1387− L.requestHeaders =
1388− let old = L.requestHeaders x
1389− in case getRequestContentType body of
1390− Nothing -> old
1391− Just contentType ->
1392− (Y.hContentType, contentType) : old
1393− }
1093+--
1094+-- __Note__: users of GHC 8.0.1 and later will see a slightly more friendly
1095+-- error message when method does not allow a body and body is provided.
1096+
1097+type family HttpBodyAllowed
1098+ (allowsBody :: CanHaveBody)
1099+ (providesBody :: CanHaveBody) :: Constraint where
1100+ HttpBodyAllowed 'NoBody 'NoBody = ()
1101+ HttpBodyAllowed 'CanHaveBody body = ()
1102+#if MIN_VERSION_base(4,9,0)
1103+ HttpBodyAllowed 'NoBody 'CanHaveBody = TypeError
1104+ ('Text "This HTTP method does not allow attaching a request body.")
1105+#endif
1106+
1107+instance HttpBody body => RequestComponent (Womb "body" body) where
1108+ getRequestMod (Womb body) = Endo $ \x ->
1109+ x { L.requestBody = getRequestBody body
1110+ , L.requestHeaders =
1111+ let old = L.requestHeaders x in
1112+ case getRequestContentType body of
1113+ Nothing -> old
1114+ Just contentType ->
1115+ (Y.hContentType, contentType) : old }
13941116
13951117----------------------------------------------------------------------------
13961118-- Request—Optional parameters
13971119
13981120-- $optional-parameters
13991121--
1400−-- Optional parameters of request include things like query parameters,
1122+-- Optional parameters to a request include things like query parameters,
14011123-- headers, port number, etc. All optional parameters have the type
14021124-- 'Option', which is a 'Monoid'. This means that you can use 'mempty' as
14031125-- the last argument of 'req' to specify no optional parameters, or combine
@@ -1406,51 +1128,46 @@ instance (HttpBody body) => RequestComponent (Tagged "body" body) where
14061128-- | The opaque 'Option' type is a 'Monoid' you can use to pack collection
14071129-- of optional parameters like query parameters and headers. See sections
14081130-- below to learn which 'Option' primitives are available.
1409−data Option (scheme :: Scheme)
1410− = Option (Endo (Y.QueryText, L.Request)) (Maybe (L.Request -> IO L.Request))
14111131
1412−-- 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
1415−-- L.Request) is a finalizer that will be applied after all other
1416−-- transformations. This is for authentication methods that sign requests
1417−-- based on data in Request.
1132+data Option (scheme :: Scheme) =
1133+ Option (Endo (Y.QueryText, L.Request)) (Maybe (L.Request -> IO L.Request))
1134+ -- NOTE 'QueryText' is just [(Text, Maybe Text)], we keep it along with
1135+ -- Request to avoid appending to existing query string in request every
1136+ -- time new parameter is added. Additional Maybe (L.Request -> IO
1137+ -- L.Request) is a finalizer that will be applied after all other
1138+ -- transformations. This is for authentication methods that sign requests
1139+ -- based on data in Request.
14181140
14191141instance Semigroup (Option scheme) where
1420− Option er0 mr0 <> Option er1 mr1 =
1421− Option
1422− (er0 <> er1)
1423− (mr0 <|> mr1)
1142+ Option er0 mr0 <> Option er1 mr1 = Option
1143+ (er0 <> er1) (mr0 <|> mr1)
14241144
14251145instance Monoid (Option scheme) where
1426− mempty = Option mempty Nothing
1146+ mempty = Option mempty Nothing
14271147 mappend = (<>)
14281148
1429−-- | Use 'formToQuery'.
1430−--
1431−-- @since 3.11.0
1432−instance FromForm (Option scheme) where
1433− fromForm = Right . formToQuery
1434−
14351149-- | A helper to create an 'Option' that modifies only collection of query
14361150-- parameters. This helper is not a part of the public API.
1151+
14371152withQueryParams :: (Y.QueryText -> Y.QueryText) -> Option scheme
14381153withQueryParams f = Option (Endo (first f)) Nothing
14391154
14401155-- | A helper to create an 'Option' that modifies only 'L.Request'. This
14411156-- helper is not a part of public API.
1157+
14421158withRequest :: (L.Request -> L.Request) -> Option scheme
14431159withRequest f = Option (Endo (second f)) Nothing
14441160
14451161instance RequestComponent (Option scheme) where
14461162 getRequestMod (Option f _) = Endo $ \x ->
14471163 let (qparams, x') = appEndo f ([], x)
1448− query = Y.renderQuery True (Y.queryTextToQuery qparams)
1449− in x' {L.queryString = query}
1164+ query = Y.renderQuery True (Y.queryTextToQuery qparams)
1165+ in x' { L.queryString = query }
14501166
14511167-- | Finalize given 'L.Request' by applying a finalizer from the given
14521168-- 'Option' (if it has any).
1453−finalizeRequest :: (MonadIO m) => Option scheme -> L.Request -> m L.Request
1169+
1170+finalizeRequest :: MonadIO m => Option scheme -> L.Request -> m L.Request
14541171finalizeRequest (Option _ mfinalizer) = liftIO . fromMaybe pure mfinalizer
14551172
14561173----------------------------------------------------------------------------
@@ -1469,12 +1186,12 @@ finalizeRequest (Option _ mfinalizer) = liftIO . fromMaybe pure mfinalizer
14691186-- This operator is defined in terms of 'queryParam':
14701187--
14711188-- > name =: value = queryParam name (pure value)
1472−infix 7 =:
14731189
1190+infix 7 =:
14741191(=:) :: (QueryParam param, ToHttpApiData a) => Text -> a -> param
14751192name =: value = queryParam name (pure value)
14761193
1477−-- | Construct a flag, that is, a valueless query parameter. For example, in
1194+-- | Construct a flag, that is, valueless query parameter. For example, in
14781195-- the following URL @\"a\"@ is a flag, while @\"b\"@ is a query parameter
14791196-- with a value:
14801197--
@@ -1483,47 +1200,27 @@ name =: value = queryParam name (pure value)
14831200-- This operator is defined in terms of 'queryParam':
14841201--
14851202-- > queryFlag name = queryParam name (Nothing :: Maybe ())
1486−queryFlag :: (QueryParam param) => Text -> param
1487−queryFlag name = queryParam name (Nothing :: Maybe ())
14881203
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
1204+queryFlag :: QueryParam param => Text -> param
1205+queryFlag name = queryParam name (Nothing :: Maybe ())
15061206
15071207-- | A type class for query-parameter-like things. The reason to have an
15081208-- overloaded 'queryParam' is to be able to use it as an 'Option' and as a
15091209-- 'FormUrlEncodedParam' when constructing form URL encoded request bodies.
15101210-- Having the same syntax for these cases seems natural and user-friendly.
1211+
15111212class QueryParam param where
1213+
15121214 -- | Create a query parameter with given name and value. If value is
15131215 -- 'Nothing', it won't be included at all (i.e. you create a flag this
15141216 -- way). It's recommended to use @('=:')@ and 'queryFlag' instead of this
15151217 -- method, because they are easier to read.
1516− queryParam :: (ToHttpApiData a) => Text -> Maybe a -> param
15171218
1518− -- | Get the query parameter names and values set by 'queryParam'.
1519− --
1520− -- @since 3.11.0
1521− queryParamToList :: param -> [(Text, Maybe Text)]
1219+ queryParam :: ToHttpApiData a => Text -> Maybe a -> param
15221220
15231221instance QueryParam (Option scheme) where
15241222 queryParam name mvalue =
15251223 withQueryParams ((:) (name, toQueryParam <$> mvalue))
1526− queryParamToList (Option f _) = fst $ appEndo f ([], L.defaultRequest)
15271224
15281225----------------------------------------------------------------------------
15291226-- Request—Optional parameters—Headers
@@ -1532,28 +1229,21 @@ instance QueryParam (Option scheme) where
15321229-- headers with the same names the leftmost header will win. This means, in
15331230-- particular, that you cannot create a request with several headers of the
15341231-- same name.
1535−header ::
1536− -- | Header name
1537− ByteString ->
1538− -- | Header value
1539− ByteString ->
1540− Option scheme
1232+
1233+header
1234+ :: ByteString -- ^ Header name
1235+ -> ByteString -- ^ Header value
1236+ -> Option scheme
15411237header name value = withRequest (attachHeader name value)
15421238
1543−-- | Attach a header with given name and content to a 'L.Request'.
1239+-- | A non-public helper that attaches a header with given name and content
1240+-- to a 'L.Request'.
15441241--
15451242-- @since 1.1.0
1243+
15461244attachHeader :: ByteString -> ByteString -> L.Request -> L.Request
15471245attachHeader name value x =
1548− x {L.requestHeaders = (CI.mk name, value) : L.requestHeaders x}
1549−
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}
1246+ x { L.requestHeaders = (CI.mk name, value) : L.requestHeaders x }
15571247
15581248----------------------------------------------------------------------------
15591249-- Request—Optional parameters—Cookies
@@ -1566,9 +1256,10 @@ headerRedacted name value = withRequest $ \x ->
15661256
15671257-- | Use the given 'L.CookieJar'. A 'L.CookieJar' can be obtained from a
15681258-- 'L.Response' record.
1259+
15691260cookieJar :: L.CookieJar -> Option scheme
15701261cookieJar jar = withRequest $ \x ->
1571− x {L.cookieJar = Just jar}
1262+ x { L.cookieJar = Just jar }
15721263
15731264----------------------------------------------------------------------------
15741265-- Request—Optional parameters—Authentication
@@ -1586,66 +1277,53 @@ cookieJar jar = withRequest $ \x ->
15861277-- | The 'Option' adds basic authentication.
15871278--
15881279-- See also: <https://en.wikipedia.org/wiki/Basic_access_authentication>.
1589−basicAuth ::
1590− -- | Username
1591− ByteString ->
1592− -- | Password
1593− ByteString ->
1594− -- | Auth 'Option'
1595− Option 'Https
1280+
1281+basicAuth
1282+ :: ByteString -- ^ Username
1283+ -> ByteString -- ^ Password
1284+ -> Option 'Https -- ^ Auth 'Option'
15961285basicAuth = basicAuthUnsafe
15971286
15981287-- | An alternative to 'basicAuth' which works for any scheme. Note that
1599−-- using basic access authentication without SSL\/TLS is vulnerable to
1288+-- using basic access authentication without SSL/TLS is vulnerable to
16001289-- attacks. Use 'basicAuth' instead unless you know what you are doing.
16011290--
16021291-- @since 0.3.1
1603−basicAuthUnsafe ::
1604− -- | Username
1605− ByteString ->
1606− -- | Password
1607− ByteString ->
1608− -- | Auth 'Option'
1609− Option scheme
1610−basicAuthUnsafe username password =
1611− customAuth
1612− (pure . L.applyBasicAuth username password)
1292+
1293+basicAuthUnsafe
1294+ :: ByteString -- ^ Username
1295+ -> ByteString -- ^ Password
1296+ -> Option scheme -- ^ Auth 'Option'
1297+basicAuthUnsafe username password = customAuth
1298+ (pure . L.applyBasicAuth username password)
16131299
16141300-- | The 'Option' set basic proxy authentication header.
16151301--
16161302-- @since 1.1.0
1617−basicProxyAuth ::
1618− -- | Username
1619− ByteString ->
1620− -- | Password
1621− ByteString ->
1622− -- | Auth 'Option'
1623− Option scheme
1303+
1304+basicProxyAuth
1305+ :: ByteString -- ^ Username
1306+ -> ByteString -- ^ Password
1307+ -> Option scheme -- ^ Auth 'Option'
16241308basicProxyAuth username password =
16251309 withRequest (L.applyBasicProxyAuth username password)
16261310
16271311-- | The 'Option' adds OAuth1 authentication.
16281312--
16291313-- @since 0.2.0
1630−oAuth1 ::
1631− -- | Consumer token
1632− ByteString ->
1633− -- | Consumer secret
1634− ByteString ->
1635− -- | OAuth token
1636− ByteString ->
1637− -- | OAuth token secret
1638− ByteString ->
1639− -- | Auth 'Option'
1640− Option scheme
1314+
1315+oAuth1
1316+ :: ByteString -- ^ Consumer token
1317+ -> ByteString -- ^ Consumer secret
1318+ -> ByteString -- ^ OAuth token
1319+ -> ByteString -- ^ OAuth token secret
1320+ -> Option scheme -- ^ Auth 'Option'
16411321oAuth1 consumerToken consumerSecret token tokenSecret =
16421322 customAuth (OAuth.signOAuth app creds)
16431323 where
1644− app =
1645− OAuth.newOAuth
1646− { OAuth.oauthConsumerKey = consumerToken,
1647− OAuth.oauthConsumerSecret = consumerSecret
1648− }
1324+ app = OAuth.newOAuth
1325+ { OAuth.oauthConsumerKey = consumerToken
1326+ , OAuth.oauthConsumerSecret = consumerSecret }
16491327 creds = OAuth.newCredential token tokenSecret
16501328
16511329-- | The 'Option' adds an OAuth2 bearer token. This is treated by many
@@ -1656,14 +1334,12 @@ oAuth1 consumerToken consumerSecret token tokenSecret =
16561334-- > oAuth2Bearer token = header "Authorization" ("Bearer " <> token)
16571335--
16581336-- See also: <https://en.wikipedia.org/wiki/OAuth>.
1659−oAuth2Bearer ::
1660− -- | Token
1661− ByteString ->
1662− -- | Auth 'Option'
1663− Option 'Https
1664−oAuth2Bearer token =
1665− customAuth
1666− (pure . attachHeader "Authorization" ("Bearer " <> token))
1337+
1338+oAuth2Bearer
1339+ :: ByteString -- ^ Token
1340+ -> Option 'Https -- ^ Auth 'Option'
1341+oAuth2Bearer token = customAuth
1342+ (pure . attachHeader "Authorization" ("Bearer " <> token))
16671343
16681344-- | The 'Option' adds a not-quite-standard OAuth2 bearer token (that seems
16691345-- to be used only by GitHub). This will be treated by whatever services
@@ -1674,20 +1350,19 @@ oAuth2Bearer token =
16741350-- > oAuth2Token token = header "Authorization" ("token" <> token)
16751351--
16761352-- See also: <https://developer.github.com/v3/oauth#3-use-the-access-token-to-access-the-api>.
1677−oAuth2Token ::
1678− -- | Token
1679− ByteString ->
1680− -- | Auth 'Option'
1681− Option 'Https
1682−oAuth2Token token =
1683− customAuth
1684− (pure . attachHeader "Authorization" ("token " <> token))
1353+
1354+oAuth2Token
1355+ :: ByteString -- ^ Token
1356+ -> Option 'Https -- ^ Auth 'Option'
1357+oAuth2Token token = customAuth
1358+ (pure . attachHeader "Authorization" ("token " <> token))
16851359
16861360-- | A helper to create custom authentication 'Option's. The given
16871361-- 'IO'-enabled request transformation is applied after all other
16881362-- modifications when constructing a request. Use wisely.
16891363--
16901364-- @since 1.1.0
1365+
16911366customAuth :: (L.Request -> IO L.Request) -> Option scheme
16921367customAuth = Option mempty . pure
16931368
@@ -1696,10 +1371,11 @@ customAuth = Option mempty . pure
16961371
16971372-- | Specify the port to connect to explicitly. Normally, 'Url' you use
16981373-- determines the default port: @80@ for HTTP and @443@ for HTTPS. This
1699−-- 'Option' allows us to choose an arbitrary port overwriting the defaults.
1374+-- 'Option' allows to choose an arbitrary port overwriting the defaults.
1375+
17001376port :: Int -> Option scheme
17011377port n = withRequest $ \x ->
1702− x {L.port = n}
1378+ x { L.port = n }
17031379
17041380-- | This 'Option' controls whether gzipped data should be decompressed on
17051381-- the fly. By default everything except for @\"application\/x-tar\"@ is
@@ -1710,40 +1386,39 @@ port n = withRequest $ \x ->
17101386-- You can also choose to decompress everything like this:
17111387--
17121388-- > decompress (const True)
1713−decompress ::
1714− -- | Predicate that is given MIME type, it returns 'True' when content
1715− -- should be decompressed on the fly.
1716− (ByteString -> Bool) ->
1717− Option scheme
1389+
1390+decompress
1391+ :: (ByteString -> Bool) -- ^ Predicate that is given MIME type, it
1392+ -- returns 'True' when content should be decompressed on the fly.
1393+ -> Option scheme
17181394decompress f = withRequest $ \x ->
1719− x {L.decompress = f}
1395+ x { L.decompress = f }
17201396
17211397-- | Specify the number of microseconds to wait for response. The default
17221398-- value is 30 seconds (defined in 'L.ManagerSettings' of connection
17231399-- 'L.Manager').
1724−responseTimeout ::
1725− -- | Number of microseconds to wait
1726− Int ->
1727− Option scheme
1400+
1401+responseTimeout
1402+ :: Int -- ^ Number of microseconds to wait
1403+ -> Option scheme
17281404responseTimeout n = withRequest $ \x ->
1729− x {L.responseTimeout = LI.ResponseTimeoutMicro n}
1405+ x { L.responseTimeout = LI.ResponseTimeoutMicro n }
17301406
17311407-- | HTTP version to send to the server, the default is HTTP 1.1.
1732−httpVersion ::
1733− -- | Major version number
1734− Int ->
1735− -- | Minor version number
1736− Int ->
1737− Option scheme
1408+
1409+httpVersion
1410+ :: Int -- ^ Major version number
1411+ -> Int -- ^ Minor version number
1412+ -> Option scheme
17381413httpVersion major minor = withRequest $ \x ->
1739− x {L.requestVersion = Y.HttpVersion major minor}
1414+ x { L.requestVersion = Y.HttpVersion major minor }
17401415
17411416----------------------------------------------------------------------------
17421417-- Response interpretations
17431418
17441419-- | Make a request and ignore the body of the response.
1420+
17451421newtype IgnoreResponse = IgnoreResponse (L.Response ())
1746− deriving (Show)
17471422
17481423instance HttpResponse IgnoreResponse where
17491424 type HttpResponseBody IgnoreResponse = ()
@@ -1752,6 +1427,7 @@ instance HttpResponse IgnoreResponse where
17521427
17531428-- | Use this as the fourth argument of 'req' to specify that you want it to
17541429-- ignore the response body.
1430+
17551431ignoreResponse :: Proxy IgnoreResponse
17561432ignoreResponse = Proxy
17571433
@@ -1759,28 +1435,28 @@ ignoreResponse = Proxy
17591435-- 'handleHttpException' method of 'MonadHttp' instance corresponding to
17601436-- monad in which you use 'req' will determine what to do in the case when
17611437-- parsing fails (the 'JsonHttpException' constructor will be used).
1438+
17621439newtype JsonResponse a = JsonResponse (L.Response a)
1763− deriving (Show)
17641440
1765−instance (FromJSON a) => HttpResponse (JsonResponse a) where
1441+instance FromJSON a => HttpResponse (JsonResponse a) where
17661442 type HttpResponseBody (JsonResponse a) = a
17671443 toVanillaResponse (JsonResponse r) = r
17681444 getHttpResponse r = do
17691445 chunks <- L.brConsume (L.responseBody r)
17701446 case A.eitherDecode (BL.fromChunks chunks) of
1771− Left e -> throwIO (JsonHttpException e)
1447+ Left e -> throwIO (JsonHttpException e)
17721448 Right x -> return $ JsonResponse (x <$ r)
1773− acceptHeader Proxy = Just "application/json"
17741449
17751450-- | Use this as the fourth argument of 'req' to specify that you want it to
17761451-- return the 'JsonResponse' interpretation.
1452+
17771453jsonResponse :: Proxy (JsonResponse a)
17781454jsonResponse = Proxy
17791455
17801456-- | Make a request and interpret the body of the response as a strict
17811457-- 'ByteString'.
1458+
17821459newtype BsResponse = BsResponse (L.Response ByteString)
1783− deriving (Show)
17841460
17851461instance HttpResponse BsResponse where
17861462 type HttpResponseBody BsResponse = ByteString
@@ -1791,13 +1467,14 @@ instance HttpResponse BsResponse where
17911467
17921468-- | Use this as the fourth argument of 'req' to specify that you want to
17931469-- interpret the response body as a strict 'ByteString'.
1470+
17941471bsResponse :: Proxy BsResponse
17951472bsResponse = Proxy
17961473
17971474-- | Make a request and interpret the body of the response as a lazy
17981475-- 'BL.ByteString'.
1476+
17991477newtype LbsResponse = LbsResponse (L.Response BL.ByteString)
1800− deriving (Show)
18011478
18021479instance HttpResponse LbsResponse where
18031480 type HttpResponseBody LbsResponse = BL.ByteString
@@ -1808,22 +1485,24 @@ instance HttpResponse LbsResponse where
18081485
18091486-- | Use this as the fourth argument of 'req' to specify that you want to
18101487-- interpret the response body as a lazy 'BL.ByteString'.
1488+
18111489lbsResponse :: Proxy LbsResponse
18121490lbsResponse = Proxy
18131491
18141492----------------------------------------------------------------------------
18151493-- Helpers for response interpretations
18161494
1817−-- | Fetch beginning of the response and return it together with a new
1495+-- | Fetch beginning of response and return it together with new
18181496-- @'L.Response' 'L.BodyReader'@ that can be passed to 'getHttpResponse' and
18191497-- such.
1820−grabPreview ::
1821− -- | How many bytes to fetch
1822− Int ->
1823− -- | Response with body reader inside
1824− L.Response L.BodyReader ->
1825− -- | Preview 'ByteString' and new response with body reader inside
1826− IO (ByteString, L.Response L.BodyReader)
1498+
1499+grabPreview
1500+ :: Int
1501+ -- ^ How many bytes to fetch
1502+ -> L.Response L.BodyReader
1503+ -- ^ Response with body reader inside
1504+ -> IO (ByteString, L.Response L.BodyReader)
1505+ -- ^ Preview 'ByteString' and new response with body reader inside
18271506grabPreview nbytes r = do
18281507 let br = L.responseBody r
18291508 (target, leftover, done) <- brReadN br nbytes
@@ -1846,17 +1525,18 @@ grabPreview nbytes r = do
18461525 if done
18471526 then return B.empty
18481527 else br
1849− return (target, r {L.responseBody = br'})
1528+ return (target, r { L.responseBody = br' })
18501529
18511530-- | Consume N bytes from 'L.BodyReader', return the target chunk, the
18521531-- leftover (may be empty), and whether we're done consuming the body.
1853−brReadN ::
1854− -- | Body reader to stream from
1855− L.BodyReader ->
1856− -- | How many bytes to consume
1857− Int ->
1858− -- | Target chunk, the leftover, whether we're done
1859− IO (ByteString, ByteString, Bool)
1532+
1533+brReadN
1534+ :: L.BodyReader
1535+ -- ^ Body reader to stream from
1536+ -> Int
1537+ -- ^ How many bytes to consume
1538+ -> IO (ByteString, ByteString, Bool)
1539+ -- ^ Target chunk, the leftover, whether we're done
18601540brReadN br n = go 0 id id
18611541 where
18621542 go !tlen t l = do
@@ -1865,9 +1545,9 @@ brReadN br n = go 0 id id
18651545 then return (r t, r l, True)
18661546 else do
18671547 let (target, leftover) = B.splitAt (n - tlen) chunk
1868− tlen' = B.length target
1869− t' = t . (target :)
1870− l' = l . (leftover :)
1548+ tlen' = B.length target
1549+ t' = t . (target:)
1550+ l' = l . (leftover:)
18711551 if tlen + tlen' < n
18721552 then go (tlen + tlen') t' l'
18731553 else return (r t', r l', False)
@@ -1877,45 +1557,47 @@ brReadN br n = go 0 id id
18771557-- Inspecting a response
18781558
18791559-- | Get the response body.
1880−responseBody ::
1881− (HttpResponse response) =>
1882− response ->
1883− HttpResponseBody response
1560+
1561+responseBody
1562+ :: HttpResponse response
1563+ => response
1564+ -> HttpResponseBody response
18841565responseBody = L.responseBody . toVanillaResponse
18851566
18861567-- | Get the response status code.
1887−responseStatusCode ::
1888− (HttpResponse response) =>
1889− response ->
1890− Int
1568+
1569+responseStatusCode
1570+ :: HttpResponse response
1571+ => response
1572+ -> Int
18911573responseStatusCode =
18921574 Y.statusCode . L.responseStatus . toVanillaResponse
18931575
18941576-- | Get the response status message.
1895−responseStatusMessage ::
1896− (HttpResponse response) =>
1897− response ->
1898− ByteString
1577+
1578+responseStatusMessage
1579+ :: HttpResponse response
1580+ => response
1581+ -> ByteString
18991582responseStatusMessage =
19001583 Y.statusMessage . L.responseStatus . toVanillaResponse
19011584
19021585-- | Lookup a particular header from a response.
1903−responseHeader ::
1904− (HttpResponse response) =>
1905− -- | Response interpretation
1906− response ->
1907− -- | Header to lookup
1908− ByteString ->
1909− -- | Header value if found
1910− Maybe ByteString
1586+
1587+responseHeader
1588+ :: HttpResponse response
1589+ => response -- ^ Response interpretation
1590+ -> ByteString -- ^ Header to lookup
1591+ -> Maybe ByteString -- ^ Header value if found
19111592responseHeader r h =
19121593 (lookup (CI.mk h) . L.responseHeaders . toVanillaResponse) r
19131594
19141595-- | Get the response 'L.CookieJar'.
1915−responseCookieJar ::
1916− (HttpResponse response) =>
1917− response ->
1918− L.CookieJar
1596+
1597+responseCookieJar
1598+ :: HttpResponse response
1599+ => response
1600+ -> L.CookieJar
19191601responseCookieJar = L.responseCookieJar . toVanillaResponse
19201602
19211603----------------------------------------------------------------------------
@@ -1926,15 +1608,19 @@ responseCookieJar = L.responseCookieJar . toVanillaResponse
19261608-- To create a new response interpretation you just need to make your data
19271609-- type an instance of the 'HttpResponse' type class.
19281610
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.
1611+-- | A type class for response interpretations. It allows to describe how to
1612+-- consume response from a @'L.Response' 'L.BodyReader'@ and produce the
1613+-- final result that is to be returned to the user.
1614+
19321615class HttpResponse response where
1616+
19331617 -- | The associated type is the type of body that can be extracted from an
19341618 -- instance of 'HttpResponse'.
1935− type HttpResponseBody response :: Type
1619+
1620+ type HttpResponseBody response :: *
19361621
19371622 -- | The method describes how to get the underlying 'L.Response' record.
1623+
19381624 toVanillaResponse :: response -> L.Response (HttpResponseBody response)
19391625
19401626 -- | This method describes how to consume response body and, more
@@ -1950,32 +1636,12 @@ class HttpResponse response where
19501636 --
19511637 -- __Note__: signature of this function was changed in the version
19521638 -- /1.0.0/.
1953− getHttpResponse ::
1954− -- | Response with body reader inside
1955− L.Response L.BodyReader ->
1956− -- | The final result
1957− IO response
1958−
1959− -- | The value of @\"Accept\"@ header. This is useful, for example, if a
1960− -- website supports both @XML@ and @JSON@ responses, and decides what to
1961− -- reply with based on what @Accept@ headers you have sent.
1962− --
1963− -- __Note__: manually specified 'Options' that set the @\"Accept\"@ header
1964− -- will take precedence.
1965− --
1966− -- @since 2.1.0
1967− acceptHeader :: Proxy response -> Maybe ByteString
1968− acceptHeader Proxy = Nothing
19691639
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
1640+ getHttpResponse
1641+ :: L.Response L.BodyReader
1642+ -- ^ Response with body reader inside
1643+ -> IO response
1644+ -- ^ The final result
19791645
19801646----------------------------------------------------------------------------
19811647-- Other
@@ -1987,12 +1653,15 @@ instance HttpResponse (L.Response ()) where
19871653-- request components easier using @('<>')@.
19881654--
19891655-- __Note__: this type class is not a part of the public API.
1656+
19901657class RequestComponent a where
1658+
19911659 -- | Get a function that takes a 'L.Request' and changes it somehow
19921660 -- returning another 'L.Request'. For example, the 'HttpMethod' instance
19931661 -- of 'RequestComponent' just overwrites method. The function is wrapped
19941662 -- in 'Endo' so it's easier to chain such “modifying applications”
19951663 -- together building bigger and bigger 'RequestComponent's.
1664+
19961665 getRequestMod :: a -> Endo L.Request
19971666
19981667-- | This wrapper is only used to attach a type-level tag to a given type.
@@ -2002,50 +1671,44 @@ class RequestComponent a where
20021671-- method@ and @'HttpBody' body => 'RequestComponent' body@ when it decides
20031672-- which instance to use (i.e. the constraints are taken into account later,
20041673-- when instance is already chosen).
2005−newtype Tagged (tag :: Symbol) a = Tagged a
1674+
1675+newtype Womb (tag :: Symbol) a = Womb a
20061676
20071677-- | Exceptions that this library throws.
1678+
20081679data HttpException
2009− = -- | A wrapper with an 'L.HttpException' from "Network.HTTP.Client"
2010− VanillaHttpException L.HttpException
2011− | -- | A wrapper with Aeson-produced 'String' describing why decoding
1680+ = VanillaHttpException L.HttpException
1681+ -- ^ A wrapper with an 'L.HttpException' from "Network.HTTP.Client"
1682+ | JsonHttpException String
1683+ -- ^ A wrapper with Aeson-produced 'String' describing why decoding
20121684 -- failed
2013− JsonHttpException String
2014− deriving (Show, Generic)
1685+ deriving (Show, Typeable, Generic)
20151686
20161687instance Exception HttpException
20171688
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−
20321689-- | A simple type isomorphic to 'Bool' that we only have for better error
20331690-- messages. We use it as a kind and its data constructors as type-level
20341691-- tags.
20351692--
20361693-- See also: 'HttpMethod' and 'HttpBody'.
1694+
20371695data CanHaveBody
2038− = -- | Indeed can have a body
2039− CanHaveBody
2040− | -- | Should not have a body
2041− NoBody
1696+ = CanHaveBody -- ^ Indeed can have a body
1697+ | NoBody -- ^ Should not have a body
20421698
20431699-- | A type-level tag that specifies URL scheme used (and thus if HTTPS is
20441700-- enabled). This is used to force TLS requirement for some authentication
20451701-- 'Option's.
1702+
20461703data Scheme
2047− = -- | HTTP
2048− Http
2049− | -- | HTTPS
2050− Https
2051− deriving (Eq, Ord, Show, Data, Generic, TH.Lift)
1704+ = Http -- ^ HTTP
1705+ | Https -- ^ HTTPS
1706+ deriving (Eq, Ord, Show, Data, Typeable, Generic)
1707+
1708+----------------------------------------------------------------------------
1709+-- Constants
1710+
1711+-- | Max length of preview fragment of response body.
1712+
1713+bodyPreviewLength :: Num a => a
1714+bodyPreviewLength = 1024