Re: Non-blocking web server

[Nala Ginrut <nalaginrut@gmail.com>]

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Hi Ryan!
For the single-threaded non-blocking server in Guile, you have to make sure
at least 3 steps:
1. set socket to non-blocking
2. enable suspended ports to prepare delimited-continuation powered
coroutine
3. designed your own scheduler

Even in the single thread, you can handle requests concurrently because of
the coroutine based on delimited-continuation.

Of course you may enhance it with thread pool.


Best regards.


On Mon, Mar 25, 2024 at 4:04 AM Ryan Raymond <rjraymond@oakland.edu> wrote:

> Hello, all.
> I was able to build a non-blocking web-server using network sockets.
> However, the existing guile web/server.scm implementation is
> single-threaded and therefore blocking, which is sub-optimal for some
> use-cases.
>
> I suggest we slightly modify the server logic to have an optional
> #:blocking? [bool] parameter which would enable behavior in line with the
> following excerpt from my own code. Obviously some changes would be made to
> methodology and code style, but you get the picture.
>
> (define (listen sock)
>   (let* (
>     (client-connection (accept sock))
>     (client-details (cdr client-connection))
>     (client (car client-connection)))
>     (begin-thread
>       (sigaction SIGPIPE SIG_IGN)
>       (handle client)
>       (close client))
>     ))
>
> This shouldn't cause any backwards-compatibility issues since it's
> optional, but the specifics of web/server.scm might cause problems.
> Let me know what you think!
> Ryan
>

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