I think this fix would belong in the HTTP library. I've opened https://github.com/haskell/HTTP/issues/66 - the only argument against making the change I can see is that it might not be consistent with other tools, but that doesn't seem to be the case.
If noone has an opposing view I'll probably implement it soon. On 08/05/2014 17:20, Simon Peyton Jones wrote: > Spot on, Kim-Ee. Thanks. unsetting http_proxy fixed it. > > > > I’m fwding to cabal-devel: it would be great that if “http_proxy” was > set to “”, then it behaved just as if it was un-set. The current > behaviour is very confusing (to me anyway). > > > > Simon > > > > *From:*Kim-Ee Yeoh [mailto:[email protected]] > *Sent:* 08 May 2014 14:48 > *To:* Simon Peyton Jones > *Cc:* Herbert Valerio Riedel; Simon Marlow; [email protected] > *Subject:* Re: Cabal can't open a TCP connection > > > > > > On Thu, May 8, 2014 at 8:22 PM, Simon Peyton Jones > <[email protected] <mailto:[email protected]>> wrote: > > On a machine that doesn't need to use a proxy server, what should > $http_proxy be set to? > > > > It's a Maybe (Maybe String) problem. Blame Cabal for not ignoring an > empty http_proxy. The *nix programs I've tried treat empty as unset. > > The solution is: unset HTTP_PROXY. > > > -- Kim-Ee > > > > ------------------------------------------------------------------------ > > *Från: *Simon Peyton Jones <mailto:[email protected]> > *Skickat: *2014-05-08 14:04 > *Till: *[email protected] <mailto:[email protected]> > *Kopia: *Simon Marlow <mailto:[email protected]> > *Ämne: *Cabal can't open a TCP connection > > Dear ghc-devs > > Cabal can’t open a TCP connection from my Linux box. It used to work > fine. Here’s what it says: > > cabal -v3 update > > Downloading the latest package list from hackage.haskell.org > > Sending: > > GET http://hackage.haskell.org/packages/archive/00-index.tar.gz HTTP/1.1 > > User-Agent: cabal-install/1.16.0.2 > > Host: hackage.haskell.org > > proxy uri host: , port: > > Creating new connection to > > cabal: openTCPConnection: host lookup failure for "" > > > > simonpj@cam-05-unx:~/code/HEAD$ cabal --version > > cabal-install version 1.16.0.2 > > using version 1.16.0.3 of the Cabal library > > simonpj@cam-05-unx:~/code/HEAD$ > > Can anyone help me work out what to do? git works just fine, so the > internet is connected all right. > > Thanks > > Simon > > > > > > _______________________________________________ > ghc-devs mailing list > [email protected] > http://www.haskell.org/mailman/listinfo/ghc-devs > _______________________________________________ ghc-devs mailing list [email protected] http://www.haskell.org/mailman/listinfo/ghc-devs
