> Francesco Pasqualini wrote:
>
> an interesting feature of JSP is the possibility to use the MVC design pattern
>(INPUT/OUTPUT/LOGIC separation)
> This is obtained with the "forward" instruction.
> How the MVC design pattern can be implemented in the mod_perl (and specifically
>Apache::ASP) architecture ?
>
I don't know about MVC design patterns, but Apache;:ASP has
these features which may help, of which $Server->Transfer()
is probably your closest match to the forward instruction:
$Server->Transfer($file)
Transfer control to another script for execution
with current script context including current $Session
$Application, etc.
my $data_ref = $Response->TrapInclude($file, @args)
print/$Response->Write() output of script does not go
straight to client browser, instead returns output
in a scalar reference that you may post process as
you like
$Response->Include($file, @args)
Like <!--#include file=$file-->, but @args are available
in script in @_
$Server->Execute() is an alias for $Response->Include()
Script_OnStart, Script_OnEnd, Script_OnFlush events
Various events called, if defined in your global.asa,
during the life of the script execution. Script_OnStart
can be used to set globals available to scripts,
or manage things such as site wide authentication control
Script_OnFlush is useful for post processing data
going to the client browser in a global way.
XMLSubs
Ability to create XML tags which are handled by
perl code execution. The nice thing is that embedded
tags pass their output as an argument to parent
XMLSubs, for example:
<my:form action=basename($0)>
<my:input type="button" />
</my:form>
The my::input sub would execute then return its HTML
to the my::form sub in a calling structure like:
&my::form(\%args, $html = &my::input(\%other_args));
-- Josh
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