[web-devel] A WebSocket library

Greg Weber greg at gregweber.info
Mon Sep 26 03:36:12 CEST 2011

Hi yi,

WAI is and will always be designed for HTTP. Websockets is a different
protocol (even though it is normally initiated over HTTP). If there is a way
that makes sense to put it websockets into WAI, it can definitely be
considered. But I believe the current plan is to put Websocket support into
Warp. Haskell code re-use will be achieved through this Websockets library.
Does that seem reasonable to you?

Greg Weber

On Sun, Sep 25, 2011 at 6:11 PM, yi huang <yi.codeplayer at gmail.com> wrote:

> On Mon, Sep 26, 2011 at 12:15 AM, Jasper Van der Jeugt <m at jaspervdj.be>wrote:
>> Hi Michael,
>> > I think my main question is: why take an enumerator? Should the
>> > function just run as an iteratee? I know that will make it much more
>> > amenable to integration with Warp. All of Warp's internal processing
>> > lives inside an Iteratee, so we can't really extract an Enumerator
>> > from there. This is already how Warp handles the request body (the
>> > application lives in an Iteratee), so I think the approach is sound.
>> You're right. I had this enumerator argument because initially it tied
>> in better with my "demo" socket server. I've removed it, the type
>> signature is now:
>>    runWebSockets :: WebSockets a
>>                   -> Iteratee ByteString IO ()
>>                  -> Iteratee ByteString IO a
>> This should work out better for Warp integration, if I understood you
>> correctly.
> This still don't work with wai at the present, because there's no way to
> create the outer iteratee which is used to send data back to client
> directly.
> I propose to expose such an iteratee through wai Request type.
>> Cheers,
>> Jasper
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> --
> http://www.yi-programmer.com/blog/
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