Hello, My fix intended that Haskell code behaves the same in various environments. That is, one socket catches both IPv4 and IPv6. And the fix works even in both IPv4-only env and IPv6-only env.
Johan's observation is correct. Network.listenOn is alreay fixed but Network.Socket.listen, which Warp relies on, is not fixed yet. I will try to fix it. When the next version of the network library will be released, the problem will disappear, I hope. --Kazu > Hi Michael, > > Kazu recently fixed this (in the stable branch on GitHub) in Network.listenOn > but perhaps the more basic Network.Socket.listen should also be changed. Lets > discuss what's the right thing to do in this thread. > > On Wed, Sep 21, 2011 at 1:38 PM, Michael Snoyman <mich...@snoyman.com> wrote: > >> Hi, >> >> One of the recurring issues that comes up in Warp is binding to IPv4 >> versus IPv6 hosts. Our current code is available at [1]. It was >> updated to look like that in this commit [2] in order to support both >> IPv4 and IPv6 hosts by default. However, now it seems than on Debian >> and FreeBSD, it *only* responds to IPv6 by default[3][4]. I'm frankly >> stumped at this point on how to have our cake and eat it too. >> >> Does anyone have an idea of the correct incantation to get Warp to do >> the Right Thing(tm) here? And if not, is there any advice on sensible >> default behavior? I'm considering allowing a few special host values: >> >> * "*" (default, what we have now): Make this bind to IPv4 >> * "ipv4": Again, bind to IPv4. Guaranteed not to change in the future >> * "ipv6": Bind to IPv6. >> >> Michael >> >> [1] https://github.com/yesodweb/wai/blob/master/warp/Network/Wai/Handler/ > Warp.hs#L119 >> [2] https://github.com/snoyberg/warp/commit/ > 02c1396c86e3fceb48cbe7df58cb631c804e24d4 >> [3] https://github.com/snoyberg/warp/issues/9 >> [4] http://stackoverflow.com/questions/7486257/ > yesod-devel-server-only-listening-on-ipv6 >> >> _______________________________________________ >> Haskell-Cafe mailing list >> Haskell-Cafe@haskell.org >> http://www.haskell.org/mailman/listinfo/haskell-cafe > _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
