[Haskell-cafe] Lifetime control of webserver

☂Josh Chia (謝任中) joshchia at gmail.com
Fri Jul 13 02:32:47 UTC 2018

Do you mean something like calling the scotty function in a server thread
and then killing the server thread when I want to stop serving? If proper
cleanup happens when I kill the thread, this should work for me.

On Fri, Jul 13, 2018 at 10:01 AM Lyndon Maydwell <maydwell at gmail.com> wrote:

> Not sure if I'm missing something, but is there any reason why you
> couldn't spin up the server in a thread then kill it when required?
>  - Lyndon
> On Fri, Jul 13, 2018 at 11:51 AM ☂Josh Chia (謝任中) <joshchia at gmail.com>
> wrote:
>> Hi,
>> My application is not a webserver but needs to run a webserver for part
>> but not all of its lifetime. Particularly, there's a part that does some
>> complex computation and I want a webserver to expose its internal
>> state/progress through HTTP.
>> It seems that the typical and expected way to use a webserver is to
>> designate the entire app itself as a webserver, so that functions like the
>> following are basically infinite loops that serve HTTP:
>> Web.Scotty.scotty:
>> http://hackage.haskell.org/package/scotty-0.11.2/docs/Web-Scotty.html#v:scotty
>> Network.Wai.Handler.Warp.run:
>> http://hackage.haskell.org/package/warp-3.2.22/docs/Network-Wai-Handler-Warp.html#v:run
>> Can I run a webserver with explicit control of its lifetime?
>> Particularly, I want to be able to kill it without killing the app or
>> explicitly serve one request at a time. I'm not restricted to scotty or
>> warp.
>> Josh
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