As you have eluded to, it is the request (not the server) which
can be configured as such. Possibly this would work for you:

<VirtualHost A>
   PerlTransHandler +Local::Handlers->startup
</VirtualHost>

<VirtualHost B>
   PerlTransHandler +Local::Handlers->startup
</VirtualHost>

package Local::Handlers;
# ...
sub startup {
  my $r = ref($_[0]) ? $_[0] : $_[1];
  # $r->is_initial_req is handy here
  $r->push_handlers(PerlResponseHandler =>  \&_response_handler); # For this 
request
  $r->handler('modperl'); # Unless set in Apache config
  return Apache2::Const::DECLINED; # Allow subsequent trans handlers to run
}
sub _response_handler {
  my $r = ref($_[0]) ? $_[0] : $_[1];
  # ...
  return Apache2::Const::OK;
}
1;

Note, the Trans phase was used because it is the earliest chance to hook in. 
However
if you are only setting the response handler, Fixup is a better place (as it 
comes after
auth, after headers are parsed, etc).


On 5/19/2012 6:23 PM, Andrew Nugged wrote:
I can set handlers directly from Apache config:

<VirtualHost A>
     PerlResponseHandler  code::A
</VirtualHost A>
<VirtualHost B>
     PerlResponseHandler  code::B
</VirtualHost B>

code A called only once and code B once too, only for specific Virtual Hosts.
I need to make same config from my startup perl script, I want to read
some own config data and then decide which handlers to add, which to
not. Bit if I do:

<VirtualHost A>
     <Perl>
         ...
         $s->push_handlers( PerlResponseHandler =>  'code::A');
     </Perl>
</VirtualHost A>
<VirtualHost B>
     <Perl>
         ...
         $s->push_handlers( PerlResponseHandler =>  'code::B');
     </Perl>
</VirtualHost B>

it presets PerlResponseHandler for code A and then code B in stack for
all requests, not for specific virtual server. That means sub-level
config's context doesn't taken into account in<Perl>  sections at all
or by push_handlers routine. Anyway, doesn't work.

I want to set up own perl handlers, from perl script (i.e. through
some push_handlers-like facility) but only for specific virtual hosts,
not for all server, one handler per virtual server (code A / B), so
one mine PerlResponseHandler will act only for virtual server A,
another for B.

I don't want to make additional dispatching in every handler to
analyse, which virtual host at current request is.

Is there's a way to make some fantasy-call like 'push handler per
virtual host' from perl? (there is not, I learned API, maybe I missed
some?)
But... how to do that?

AS one pre-idea I found in API was:

<VirtualHost A>
     <Perl>
         ...
         $s->add_config(['PerlResponseHandler code::A'])
     </Perl>
</VirtualHost A>
<VirtualHost B>
     <Perl>
         ...
         $s->add_config(['PerlResponseHandler code::B'])
     </Perl>
</VirtualHost B>

but does $s->add_config works in current config context, or from
Apache config's root as $s->push_handlers?
and... intuitively I think it's not straight way. Through some strange
backdoor, right?
Maybe there's more fancy way?



P.S. I don't want to enable global request, want to make more
efficient / less memory code.

--
creator, owner and maintainer of http://www.ladoshki.com and http://patent.km.ua
my CV/about: http://patent.km.ua/eng/nugged?nc=lmp20
With respect, Andrew Nugged.

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