File: ESI.pm

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package Catalyst::View::Component::SubInclude::ESI;
use Moose;
use namespace::clean -except => 'meta';

=head1 NAME

Catalyst::View::Component::SubInclude::ESI - Edge Side Includes (ESI) plugin for C::V::Component::SubInclude

=head1 VERSION

Version 0.07_03

=cut

our $VERSION = '0.07_03';
$VERSION = eval $VERSION;

=head1 SYNOPSIS

In your view class:

  package MyApp::View::TT;
  use Moose;

  extends 'Catalyst::View::TT';
  with 'Catalyst::View::Component::SubInclude';

  __PACKAGE__->config( subinclude_plugin => 'ESI' );

Then, somewhere in your templates:

  [% subinclude('/my/widget') %]

=head1 DESCRIPTION

C<Catalyst::View::Component::SubInclude::ESI> renders C<subinclude> calls as 
Edge Side Includes (ESI) include directives. This is a feature implemented by 
Varnish (L<http://varnish.projects.linpro.no/>) which allows cache-efficient 
uses of includes.

=head1 METHODS

=head2 C<generate_subinclude( $c, $path, @args )>

Note that C<$path> should be the private action path - translation to the public
path is handled internally. After translation, this will roughly translate to 
the following code:

  my $url = $c->uri_for( $translated_path, @args )->path_query;
  return '<!--esi <esi:include src="$url" /> -->';

Notice that the stash will always be empty. This behavior could be configurable
in the future through an additional switch - for now, this behavior guarantees a
common interface for plugins.

=cut

sub generate_subinclude {
    my ($self, $c, $path, @params) = @_;

    my $uri = $c->uri_for_action( $path, @params );

    return '<!--esi <esi:include src="' . $uri->path_query . '" /> -->';
}

=head1 SEE ALSO

L<Catalyst::View::Component::SubInclude|Catalyst::View::Component::SubInclude>, 
L<http://www.catalystframework.org/calendar/2008/17>,
L<http://varnish.projects.linpro.no/>

=head1 AUTHOR

Nilson Santos Figueiredo Junior, C<< <nilsonsfj at cpan.org> >>

=head1 SPONSORSHIP

Development sponsored by Ionzero LLC L<http://www.ionzero.com/>.

=head1 COPYRIGHT & LICENSE

Copyright (C) 2009 Nilson Santos Figueiredo Junior.

Copyright (C) 2009 Ionzero LLC.

This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.

=cut

__PACKAGE__->meta->make_immutable;
1;