Re: Problems with running Network Socket Examples

[<tomas@tuxteam.de>]

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On Sun, Nov 26, 2023 at 09:59:58PM +0100, Erik Grun wrote:
> Hello, Guile-Devel,
> 
> I just can't get the Network Socket Examples[1] to work. I am using Guile
> 3.0.7.
> 
> An obvious mistake seems to be, that the docs use different ports for client
> (80) and server (2904), but even if I use the same port (2904), I only get
> this error message:
> 
> Backtrace:
> In ice-9/boot-9.scm:
>    1752:10  6 (with-exception-handler _ _ #:unwind? _ # _)
> In unknown file:
>             5 (apply-smob/0 #<thunk 7f5e06560f60>)
> In ice-9/boot-9.scm:
>      724:2  4 (call-with-prompt _ _ #<procedure default-prompt-handle…>)
> In ice-9/eval.scm:
>      619:8  3 (_ #(#(#<directory (guile-user) 7f5e06559c80>)))
> In ice-9/boot-9.scm:
>     2835:4  2 (save-module-excursion _)
>    4380:12  1 (_)
> In /home/egnun/client.scm:
>       7:14  0 (_)
> 
> /home/egnun/client.scm:7:14: Unbound variable: read-line
> 
> After some research I found out, that I need to include this line.
>      (use-modules (ice-9 rdelim))

Yes, I'd consider both of the above as downright doc bugs: the missing
of (ice-9 rdelim) in the client code and letting the client aim at a
different port the server is set up to listen to.

As for the third...

> When I do that, it seems to kinda work?
> 
> Hello client
> Backtrace:

[...]

> ERROR: In procedure %read-line:
> In procedure fport_read: Connection was reset by peer

... it is working "as it is supposed to": the server closes the
connection after sending the reply -- the client isn't set up
to expect this and complains (note that it dutifully prints the
server's answer "Hello client" before).

So this one is confusing, but we'd need a bit more of discussion
on how to "fix" it without complicating the examples too much.

Ideas?

Cheers
-- 
t

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