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package Perlanet::Trait::Scrubber;
use 5.10.0;
use strict;
use warnings;
use Moose::Role;
use namespace::autoclean;
use HTML::Scrubber;
=head1 NAME
Perlanet::Trait::Scrubber - clean posts with HTML::Scrubber before aggregating
=head1 DESCRIPTION
Before adding a post to the aggregated feed, it will first be cleaned with
L<HTML::Scrubber>.
=head1 ATTRIBUTES
=head1 scrubber
An instance of L<HTML::Scrubber> used to remove unwanted content from
the feed entries. For default settings see source of Perlanet.pm.
=cut
has 'scrubber' => (
is => 'rw',
lazy_build => 1
);
sub _build_scrubber {
my $self = shift;
my %scrub_rules = (
img => {
src => qr{^https?://}, # only URL with http://
alt => 1, # alt attributes allowed
align => 1, # allow align on images
style => 1,
width => 1,
height => 1,
'*' => 0, # deny all others
},
style => 0,
script => 0,
span => {
id => 0, # blogger(?) includes spans with id attribute
},
a => {
href => 1,
'*' => 0,
},
iframe => {
frameborder => 0,
scrolling => 0,
seamless => 0,
'*' => 1,
},
centre => 0,
);
# Definitions for HTML::Scrub
my %scrub_def = (
'*' => 1,
'href' => qr{^(?!(?:java)?script)}i,
'src' => qr{^(?!(?:java)?script)}i,
'cite' => '(?i-xsm:^(?!(?:java)?script))',
'language' => 0,
'name' => 1,
'value' => 1,
'onblur' => 0,
'onchange' => 0,
'onclick' => 0,
'ondblclick' => 0,
'onerror' => 0,
'onfocus' => 0,
'onkeydown' => 0,
'onkeypress' => 0,
'onkeyup' => 0,
'onload' => 0,
'onmousedown' => 0,
'onmousemove' => 0,
'onmouseout' => 0,
'onmouseover' => 0,
'onmouseup' => 0,
'onreset' => 0,
'onselect' => 0,
'onsubmit' => 0,
'onunload' => 0,
'src' => 1,
'type' => 1,
'style' => 1,
'class' => 0,
'id' => 0,
'frameborder' => 0,
'border' => 0,
);
my $scrub = HTML::Scrubber->new;
$scrub->rules(%scrub_rules);
$scrub->default(1, \%scrub_def);
$scrub->script(0);
return $scrub;
}
around 'clean_html' => sub {
my $orig = shift;
my $self = shift;
my ($html) = @_;
warn __PACKAGE__, '::clean_html' if $ENV{PERLANET_DEBUG};
$html = $self->$orig($html);
my $scrubbed = $self->scrubber->scrub($html);
return $scrubbed;
};
=head1 AUTHOR
Dave Cross, <dave@perlhacks.com>
=head1 COPYRIGHT AND LICENSE
Copyright (c) 2010 by Magnum Solutions Ltd.
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself, either Perl version 5.10.0 or,
at your option, any later version of Perl 5 you may have available.
=cut
1;
|
