Re: Koala update

Hi,

Bastian M?üller wrote:
>> (4) Create some macros that keep the URL <=> responder mappings
>>      at a central place.
>
> New proposal:
> 
> define responders
>    "/foo/"
>       (argument-regex1) => foo-argument-responder1,
>       (argument-regex1) => begin
>         foo-argument-method1;
>         foo-argument-method2;
>       end;
>    "/baz" () => baz-responder;       // without argument-regex
>    "/blub" => blub-responder;        // normal page-responder
>    ...
> 
> As there are still no comments, I'd like to encourge anyone who's
> working on/with koala to to post his wishes and thoughts.

I like the system Allegro Webactions
[http://opensource.franz.com/aserve/aserve-dist/webactions/doc/webactions.html]
has:
 (("main" "main.clp")
  ("signin" action-sign-in)
  ("choice"   action-check-login "choice.clp")
  ("vote"     action-check-login action-vote)
  ("thanks"   action-check-login "thanks.clp")))

The left hand side are URLs, the right hand side are the actions. There
are two different actions available: a function call (like
action-check-login) or a website ("thanks.clp", for dynamic content,
like dsp). Actions are executed sequentially, stopping if an action
returned false.

It is quite common that some parts are only accessible after a
successful authentication, that's why I would like to have the
possibility to express this directly in the map. So, my current proposal
for the macro would be:

define url-map
  "/foo" ("\w/\w/\w") => bind-arguments; "foo.dsp",
	 ("") => "foo.dsp";
  "/bar" ("\d/\d/\w") => authenticated-user?; bind-arguments; "bar.dsp";
  "/foobar" () => admin-user?; foobar-responder;
  "/barfoo" () => "barfoo.dsp";
end;

Which is quite similar, the major difference is what is written on the
right hand side of an URL. I'd be happy if there is support for
functions (which are called with apply (function, args-from-regex)) as
well as dsp files (by writing a string (or symbol?)).

I also really like to have the authentication-checks at one central
place, so it's easy to see who is supposed to have access to which pages.

Happy hacking,

Hannes