[Ur] Ur/Web on MIT Scripts

[Benjamin Barenblat]

Hi all—

This message didn’t make it to the Ur mailing list, because I wasn’t
subscribed at the time I sent it.  Here it is.

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On Friday, January  2, 2015, at  1:45 am EST, Blake Elias wrote:
> Can you tell me how that 6.947 example got put up on scripts in this
> way?

Yes!

The short version is that you need to put ‘prefix /urweb/hello/’ in your
hello.urp file and

    Options +ExecCGI
    AddHandler cgi-script .exe
    RewriteRule hello$ /urweb/hello.exe/index [R]
    RewriteRule hello/$ /urweb/hello.exe/index [R]

in /mit/eliasb/web_scripts/urweb/.htaccess.  Then you can run

    $ urweb -protocol cgi -static hello
    $ cp hello.exe /mit/eliasb/web_scripts/urweb/
    $ fs sa /mit/eliasb/web_scripts/urweb/ daemon.scripts rl

and you should be good to go.

There are several things going on here.  First of all, Ur/Web can
generate three types of executables: standalone web servers (the
default), CGI programs (if compiled with the -protocol cgi option), and
FastCGI programs (if compiled with the -protocol fastcgi option).
You’re evidently building a standalone web server, and Scripts can only
run CGI and FastCGI programs.  For 6.947, I used a CGI program; they’re
much easier to set up and debug, at the expense of performance.  I’d
strongly recommend sticking with a CGI program until you do a final
release of your app, at which point you can reinvestigate FastCGI.

You also have a permissions problem in your Scripts setup – in order to
serve your site, daemon.scripts needs to have at least rl access.

I think that’s all you need to do to get things working.  If you still
have issues, get back in touch!

Best,
Benjamin
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