[racket] Hosting the try-racket REPL.

Hmm.

Alright, replacing the calls to slideshow with calls directly to pict, as
well as commenting out the racket/gui/base calls successfully gets the code
to run without X.

However, something about how it converts the picts for web isn't working,
so instead of a neat little circle, for instance, I get "(pict '(prog
#<procedure:... etc." instead.

I suspect this is probably something to do with a difference in behavior in
how images are converted by the server, which does a convertible? test and
then runs:
 (run-code ev `(bytes-append #"data:image/png;base64,"
                         (base64-encode (convert ,res 'png-bytes) #"")))

At an idiot's guess, something is different about how pict is making the
images, so convertible? is #f and the code just prints the (pict '(prog...
stuff.

I've set up a fork here: https://github.com/jarcane/try-racket
I'm still working on getting the DNS set properly though, so no
try-racket.org yet; the servlet is public at http://104.131.18.192:8000/
but I haven't figured out how to get try-racket.org to go there yet.


<robby at eecs.northwestern.edu> wrote:

> Maybe you can use  slideshow/code-pict instead?
>
> Robby
>
> On Sun, Sep 21, 2014 at 6:00 PM, Marc Burns <m4burns at csclub.uwaterloo.ca>
> wrote:
> > The culprit is the slideshow/code module loaded into the sandbox
> > evaluator. Requiring slideshow/code attempts to establish an X server
> > connection.
> >
> > On Mon, Sep 22, 2014 at 12:12:37AM +0300, J Arcane wrote:
> >> Greetings,
> >>
> >> For some time now, it's bothered me a bit that Racket doesn't have an
> >> online REPL currently hosted anywhere. There's one written here:
> >> https://github.com/voila/try-racket
> >>
> >> But no one's hosted it anywhere. So I took it upon myself to fix that.
> I've
> >> purchased try-racket.org and a basic DigitalOcean droplet to host it
> on,
> >> but I've hit a snag: I can't get it to run.
> >>
> >> It runs more or less without trouble on my personal FreeBSD box, but on
> my
> >> Debian 7 droplet I waded through countless dependency issues until
> finally
> >> I reached what seems to be this same error:
> >>
> >> http://bugs.racket-lang.org/query/?cmd=view%20audit-trail&pr=12465
> >>
> >> Presuming that perhaps this was in someway trying to run Racket in an
> >> actual GUI window whether I wanted it to or not, I attempted to run it
> as
> >> --script, but this just quits silently instead, leaving no servlet
> behind
> >> either.
> >>
> >> Any ideas what I might be doing wrong? or have I hit a proper bug? (IME
> >> it's usually the former ... )
> >>
> >> John Berry
> >> http://jarcane.github.com
> >
> >> ____________________
> >>   Racket Users list:
> >>   http://lists.racket-lang.org/users
> >
> > ____________________
> >   Racket Users list:
> >   http://lists.racket-lang.org/users
>
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