I use a base class which can check the appropriate permissions/credentials in the cgiapp_prerun phase. Here's an example where I check to see if a user has an admin bit -- all the administration modules in this app inherit from this. If the user doesn't have the right credentials, then the runmode is reset to unauthorized, which just displays a "permission denied" screen. You can use the same technique for interrupting the session with a login screen -- although for this app I use mod_auth_tkt for that purpose instead. 
package Alex2::CGI::Admin;

use strict;
use warnings;

use base 'Alex2::CGI';

sub setup { 
    my $self = shift;
    $self->run_modes( [ 'main' ] );
    $self->start_mode( 'main' );
}

sub cgiapp_prerun { 
    my $self = shift;

    $self->SUPER::cgiapp_prerun( @_ );

    $self->run_modes( [ 'unauthorized' ] );

    unless( $self->user->admin or $self->user->group_admin ) { 
        $self->prerun_mode( 'unauthorized' );
    }

    # group admins can only use certain tools
    if ( $self->user->group_admin and !$self->allows_group_admin ) { 
        $self->prerun_mode( 'unauthorized' );
    }
}

....

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In reply to Re: juggling multiple CGI::Application subclasses by friedo
in thread juggling multiple CGI::Application subclasses by ysth

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