Pict should be making them just the same and they should convert fine even if the GUI libraries aren't yet required. For example:
Welcome to Racket v6.1.0.8. > (require file/convertible pict) > (convertible? (disk 1)) #t > (convert (disk 1) 'png-bytes) #"\211PNG\r\n\32\n\0\0\0\rIHDR\0\0\0\1\0\0\0\1\b\6\0\0\0\37\25\304\211\0\0\0\rIDAT\b\231c```8\2\0\0\311\0\305\336\357!\202\0\0\0\0IEND\256B`\202" But, that said, it may be easiest to get X going, because people who submit programs can easily run into this problem too. Robby On Mon, Sep 22, 2014 at 12:17 AM, J Arcane <jarc...@gmail.com> wrote: > 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. > > > <ro...@eecs.northwestern.edu> wrote: >> >> Maybe you can use slideshow/code-pict instead? >> >> Robby >> >> On Sun, Sep 21, 2014 at 6:00 PM, Marc Burns <m4bu...@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 > > ____________________ Racket Users list: http://lists.racket-lang.org/users
