Update to using HTTP-4000.x

This should fix a long-standing bug with http proxies (ticket #352)
It should also make downloads faster, or at least use less memory.

cabal-install/Distribution/Client/BuildReports/Upload.hs

@@ -14,6 +14,7 @@ import Network.Browser
 import Network.HTTP
          ( Header(..), HeaderName(..)
          , Request(..), RequestMethod(..), Response(..) )
+import Network.TCP (HandleStream)
 import Network.URI (URI, uriPath, parseRelativeReference, relativeTo)
 
 import Control.Monad
@@ -26,7 +27,8 @@ import Distribution.Client.BuildReports.Anonymous (BuildReport)
 type BuildReportId = URI
 type BuildLog = String
 
-uploadReports :: URI -> [(BuildReport, Maybe BuildLog)] ->  BrowserAction ()
+uploadReports :: URI -> [(BuildReport, Maybe BuildLog)]
+              ->  BrowserAction (HandleStream BuildLog) ()
 uploadReports uri reports
     = forM_ reports $ \(report, mbBuildLog) ->
       do buildId <- postBuildReport uri report
@@ -34,7 +36,8 @@ uploadReports uri reports
            Just buildLog -> putBuildLog buildId buildLog
            Nothing       -> return ()
 
-postBuildReport :: URI -> BuildReport -> BrowserAction BuildReportId
+postBuildReport :: URI -> BuildReport
+                -> BrowserAction (HandleStream BuildLog) BuildReportId
 postBuildReport uri buildReport = do
   setAllowRedirects False
   (_, response) <- request Request {
@@ -53,7 +56,8 @@ postBuildReport uri buildReport = do
     _         -> error "Unrecognised response from server."
   where body  = BuildReport.show buildReport
 
-putBuildLog :: BuildReportId -> BuildLog -> BrowserAction ()
+putBuildLog :: BuildReportId -> BuildLog
+            -> BrowserAction (HandleStream BuildLog) ()
 putBuildLog reportId buildLog = do
   --FIXME: do something if the request fails
   (_, response) <- request Request {

cabal-install/Distribution/Client/Fetch.hs

@@ -36,6 +36,8 @@ import Distribution.Client.IndexUtils as IndexUtils
          ( getAvailablePackages, disambiguateDependencies )
 import qualified Distribution.Client.InstallPlan as InstallPlan
 import Distribution.Client.HttpUtils (getHTTP, isOldHackageURI)
+import Distribution.Client.Utils
+         ( writeFileAtomic )
 
 import Distribution.Package
          ( PackageIdentifier, packageName, packageVersion, Dependency(..) )
@@ -48,7 +50,7 @@ import Distribution.Simple.Configure
          ( getInstalledPackages )
 import Distribution.Simple.Utils
          ( die, notice, info, debug, setupMessage
-         , copyFileVerbose, writeFileAtomic )
+         , copyFileVerbose )
 import Distribution.System
          ( buildPlatform )
 import Distribution.Text
@@ -68,7 +70,9 @@ import qualified System.FilePath.Posix as FilePath.Posix
 import Network.URI
          ( URI(uriPath, uriScheme) )
 import Network.HTTP
-         ( ConnError(..), Response(..) )
+         ( Response(..) )
+import Network.Stream
+         ( ConnError(..) )
 
 
 downloadURI :: Verbosity

cabal-install/Distribution/Client/HttpUtils.hs

@@ -15,6 +15,8 @@ import Network.Browser
          , setOutHandler, setErrHandler, setProxy, request)
 import Control.Monad
          ( mplus, join )
+import qualified Data.ByteString.Lazy as ByteString
+import Data.ByteString.Lazy (ByteString)
 #ifdef WIN32
 import System.Win32.Types
          ( DWORD, HKEY )
@@ -125,15 +127,15 @@ uri2proxy uri@URI{ uriScheme = "http:"
                        _      -> pwd'
 uri2proxy _ = Nothing
 
-mkRequest :: URI -> Request
+mkRequest :: URI -> Request ByteString
 mkRequest uri = Request{ rqURI     = uri
                        , rqMethod  = GET
                        , rqHeaders = [Header HdrUserAgent userAgent]
-                       , rqBody    = "" }
+                       , rqBody    = ByteString.empty }
   where userAgent = "cabal-install/" ++ display Paths_cabal_install.version
 
 -- |Carry out a GET request, using the local proxy settings
-getHTTP :: Verbosity -> URI -> IO (Result Response)
+getHTTP :: Verbosity -> URI -> IO (Result (Response ByteString))
 getHTTP verbosity uri = do
                  p   <- proxy verbosity
                  let req = mkRequest uri

cabal-install/Distribution/Client/Upload.hs

@@ -21,6 +21,7 @@ import Network.Browser
 import Network.HTTP
          ( Header(..), HeaderName(..), findHeader
          , Request(..), RequestMethod(..), Response(..) )
+import Network.TCP (HandleStream)
 import Network.URI (URI(uriPath), parseURI)
 
 import Data.Char        (intToDigit)
@@ -104,7 +105,8 @@ check verbosity paths = do
             notice verbosity $ "Checking " ++ path ++ "... "
             handlePackage verbosity checkURI (return ()) path
 
-handlePackage :: Verbosity -> URI -> BrowserAction () -> FilePath -> IO ()
+handlePackage :: Verbosity -> URI -> BrowserAction (HandleStream String) ()
+              -> FilePath -> IO ()
 handlePackage verbosity uri auth path =
   do req <- mkRequest uri path
      p   <- proxy verbosity
@@ -126,7 +128,7 @@ handlePackage verbosity uri auth path =
                        Just "text/plain" -> notice verbosity $ rspBody resp
                        _                 -> debug verbosity $ rspBody resp
 
-mkRequest :: URI -> FilePath -> IO Request
+mkRequest :: URI -> FilePath -> IO (Request String)
 mkRequest uri path = 
     do pkg <- readBinaryFile path
        boundary <- genBoundary

cabal-install/cabal-install.cabal

@@ -71,7 +71,7 @@ Executable cabal
                    Cabal >= 1.6 && < 1.7,
                    filepath >= 1.0,
                    network >= 1 && < 3,
-                   HTTP >= 3000 && < 3002,
+                   HTTP >= 4000.0.2 && < 4001,
                    zlib >= 0.4 && < 0.6
 
     if flag(old-base)