module Network.HTTP.Conduit.Response
( Response (..)
, getResponse
, lbsResponse
) where
import Control.Arrow (first)
import Data.Typeable (Typeable)
import qualified Data.ByteString.Char8 as S8
import qualified Data.ByteString.Lazy as L
import qualified Data.CaseInsensitive as CI
import Control.Monad.Trans.Resource (ResourceT, ResourceIO)
import qualified Data.Conduit as C
import qualified Data.Conduit.Zlib as CZ
import qualified Data.Conduit.Binary as CB
import qualified Data.Conduit.List as CL
import qualified Network.HTTP.Types as W
import Network.HTTP.Conduit.Manager
import Network.HTTP.Conduit.Request
import Network.HTTP.Conduit.Util
import Network.HTTP.Conduit.Parser
import Network.HTTP.Conduit.Chunk
data Response body = Response
{ statusCode :: W.Status
, responseHeaders :: W.ResponseHeaders
, responseBody :: body
}
deriving (Show, Eq, Typeable)
lbsResponse :: C.Resource m
=> ResourceT m (Response (C.BufferedSource m S8.ByteString))
-> ResourceT m (Response L.ByteString)
lbsResponse mres = do
res <- mres
bss <- responseBody res C.$$ CL.consume
return res
{ responseBody = L.fromChunks bss
}
getResponse :: ResourceIO m
=> ConnRelease m
-> Request m
-> C.BufferedSource m S8.ByteString
-> ResourceT m (Response (C.BufferedSource m S8.ByteString))
getResponse connRelease req@(Request {..}) bsrc = do
((_, sc, sm), hs) <- bsrc C.$$ sinkHeaders
let s = W.Status sc sm
let hs' = map (first CI.mk) hs
let mcl = lookup "content-length" hs' >>= readDec . S8.unpack
body <- if hasNoBody method sc || mcl == Just 0
then do
C.bufferSource $ CL.sourceList []
else do
bsrc' <-
if ("transfer-encoding", "chunked") `elem` hs'
then C.bufferSource $ bsrc C.$= chunkedConduit rawBody
else
case mcl of
Just len -> C.bufferSource $ bsrc C.$= CB.isolate len
Nothing -> return bsrc
if needsGunzip req hs'
then C.bufferSource $ bsrc' C.$= CZ.ungzip
else return bsrc'
let toPut = Just "close" /= lookup "connection" hs'
let cleanup = connRelease $ if toPut then Reuse else DontReuse
return $ Response s hs' $ addCleanup cleanup body
addCleanup :: C.ResourceIO m
=> ResourceT m ()
-> C.BufferedSource m a
-> C.BufferedSource m a
addCleanup cleanup bsrc = C.BufferedSource
{ C.bsourcePull = do
res <- C.bsourcePull bsrc
case res of
C.Closed -> cleanup
C.Open _ -> return ()
return res
, C.bsourceUnpull = C.bsourceUnpull bsrc
, C.bsourceClose = do
C.bsourceClose bsrc
cleanup
}