web-server uses mred web-server-text uses mzscheme When the web-server loads a servlet, it loads it in a new namespace. The server must copy in certain modules, such as mzscheme, (lib "servlet.ss" "web-server"), etc. Before it did not detect if it was loaded with mred or mzscheme and never copied in (lib " mred.ss" "mred"). Now it does. Jay <div>On 4/8/06, Robby Findler <<a href="mailto:robby@cs.uchicago.edu">robby@cs.uchicago.edu</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">That error message suggests that the web server is using mzscheme to start, not mred. Robby At Sat, 8 Apr 2006 12:57:42 -0700 (PDT), Danny Yoo wrote: > > Using the plt web-server, I would like for users to be able to upload an > > image file to the server, then I would resize the image to fit the > > required dimensions for the site. Now AFAIK, the only way I can process > > an image is using the bitmap% object which is available only with MrEd. > > The docs for the web-server state that "Servlets can use the full MrEd > > functionality" when started with the command "web-server". But when I do > > this, and try to make a button% object, I get reference to undefined > > identifier errors. > > > > Can anyone help me with what I'm doing wrong? I'm using PLT version 301. > > > Hi Eric, > > Ok, I can duplicate your problem with module-based servlets. > > Here's the sample servlet I'm testing, and the error message I see.  I > haven't investigated this yet, but hope that this will help others figure > out what's going on.  (I have go to lunch right now!  *grin*) > > ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; > (module test mzscheme >   (require (lib "mred.ss" "mred")) >   (provide interface-version timeout start) >   (define interface-version 'v1) >   (define timeout +inf.0) >   (define (start initial-request) >     (list #"text/plain" >           (format "~a" button%)))) > ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; > > > I get a 500 with the following error: > > --------------------------------------------------------------------------- > Servlet didn't load. > dynamic-require: unknown module: #%mred-kernel > >  === context === > /export/home/dyoo/local/plt/collects/web-server/dispatch- servlets.ss:285:4: > lo > ad-servlet/path > /export/home/dyoo/local/plt/collects/web-server/dispatch-servlets.ss:268:4: > re > load-servlet-script > /export/home/dyoo/local/plt/collects/web-server/cache- table.ss:38:46 > /export/home/dyoo/local/plt/collects/web-server/cache-table.ss:38:46 > /export/home/dyoo/local/plt/collects/web-server/cache-table.ss:30:13 > cache-table-lookup! > cache-table-lookup! > body > /export/home/dyoo/local/plt/collects/web-server/dispatch-servlets.ss:59:4: > ser > vlet-content-producer/path > /export/home/dyoo/local/plt/collects/web-server/dispatch-sequencer.ss :9:4: > loo > p > loop > loop > loop > /export/home/dyoo/local/plt/collects/web-server/web-server-unit.ss:105:8: > conn > ection-loop > /export/home/dyoo/local/plt/collects/web-server/web- server-unit.ss:93: > -------------------------------------------------------------------------- > > _________________________________________________ >   For list-related administrative tasks: >   <a href="http://list.cs.brown.edu/mailman/listinfo/plt-scheme">http://list.cs.brown.edu/mailman/listinfo/plt-scheme</a> _________________________________________________   For list-related administrative tasks:    <a href="http://list.cs.brown.edu/mailman/listinfo/plt-scheme">http://list.cs.brown.edu/mailman/listinfo/plt-scheme</a> </blockquote></div> -- Jay McCarthy <<a href="mailto:jay@cs.brown.edu"> jay@cs.brown.edu</a>> <a href="http://jay.makeoutcity.com/">http://jay.makeoutcity.com/</a>