[Mongrel] Comet style requests with mongrel

Eden Li eden at hulu.com
Mon Nov 26 06:13:20 EST 2007


Try doing the sleep in the `response.start {|head, out| ... }` block,
and call #flush on `out`.

On 11/26/07, Jeremy Wilkins <jeremy at ibexinternet.co.uk> wrote:
> Cheers for the reply, the intention was to use a custom handler to
> bypass rails for just this one action. I'm currently using a poll,
> and am looking into the possibility of keeping the connection open
> instead. There will only be a maximum of 15 connections open at any
> one time - would this still be limited by ruby file descriptor limit?
>
> I've managed to get mongrel handler almost doing what I want but not
> quite - I can't tell mongrel to flush data down the socket at the
> moment, is there a way to go about this. I've had a look at
>
> http://adam.blogs.bitscribe.net/2007/05/08/comet-with-rails-mongrel/
>
> but can't get this approach to work since it seems to depend on a non
> existant HTTPResponse.flush method.
>
> Thanks
>
> Jeremy
>
> On 23 Nov 2007, at 22:23, Zed A. Shaw wrote:
>
> > On Fri, 23 Nov 2007 16:26:04 +0000
> > Jeremy Wilkins <jeremy at ibexinternet.co.uk> wrote:
> >
> >> Hi,
> >>
> >> I've been doing some experiments with php and if can use something
> >> like
> >>
> >> <?php
> >>
> >> for ($i = 0; $i < 100; $i++) {
> >>      echo "hello world";
> >>      flush();
> >>      sleep(10);
> >> }
> >>
> >> ?>
> >>
> >> to keep a http link open for an arbitrary amount of time and
> >> routinely display "hello world" in the browser window.
> >>
> >> Is is possible to write a mongrel handler to do something similar?
> >
> > Yep, you could probably write a handler to do that, but probably
> > not a rails action without tons of surgery.
> >
> > However, this will fall down pretty quick once you hit Ruby's 1024
> > (or less) file descriptor limit due to its use of select.
> >
> > Zed
> > _______________________________________________
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>
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