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# BEGIN BPS TAGGED BLOCK {{{
#
# COPYRIGHT:
#
# This software is Copyright (c) 1996-2024 Best Practical Solutions, LLC
# <sales@bestpractical.com>
#
# (Except where explicitly superseded by other copyright notices)
#
#
# LICENSE:
#
# This work is made available to you under the terms of Version 2 of
# the GNU General Public License. A copy of that license should have
# been provided with this software, but in any event can be snarfed
# from www.gnu.org.
#
# This work is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301 or visit their web page on the internet at
# http://www.gnu.org/licenses/old-licenses/gpl-2.0.html.
#
#
# CONTRIBUTION SUBMISSION POLICY:
#
# (The following paragraph is not intended to limit the rights granted
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# community by submitting them to Best Practical Solutions, LLC.)
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# Request Tracker, to Best Practical Solutions, LLC, you confirm that
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# END BPS TAGGED BLOCK }}}
package RT::Interface::Web::Scrubber::Restrictive;
use strict;
use warnings;
use 5.010;
use base qw/RT::Interface::Web::Scrubber/;
=head1 NAME
RT::Interface::Web::Scrubber::Restrictive
=head1 DESCRIPTION
This is a subclass of L<RT::Interface::Web::Scrubber>. It's stricter than
L<RT::Interface::Web::Scrubber> with the following additional restrictions:
=over 4
=item Links
External domains not defined in L<RT_Config/RestrictLinkDomains> will be removed.
=back
=head1 VARIABLES
These variables can be altered by creating a C<Restrictive_Local.pm>
file, containing something of the form:
package RT::Interface::Web::Scrubber::Restrictive;
# Deny the "alt" attribute of images
$RULES{'img'} = { alt => 0 };
=over
=item C<%RULES>
Passed to L<HTML::Scrubber/rules>.
=back
=cut
our %RULES = (
a => {
%RT::Interface::Web::Scrubber::ALLOWED_ATTRIBUTES,
$RT::Interface::Web::Scrubber::RULES{a} ? %{ $RT::Interface::Web::Scrubber::RULES{a} } : (),
href => sub {
my ( $self, $tag, $attr, $href ) = @_;
return $href unless $href;
# Allow internal RT macros like __WebPath__, etc.
return $href if $href !~ /^\w+:/ && $href =~ $RT::Interface::Web::Scrubber::ALLOWED_ATTRIBUTES{'href'};
my $uri = URI->new($href);
unless ( $uri->can("host") && $uri->host ) {
RT->Logger->warn("Unknown link: $href");
return '';
}
my $rt_host = RT::Interface::Web::_NormalizeHost( RT->Config->Get('WebBaseURL') )->host;
my $host = lc $uri->host;
for my $allowed_domain ( $rt_host, @{ RT->Config->Get('RestrictLinkDomains') || [] } ) {
if ( $allowed_domain =~ /\*/ ) {
# Turn a literal * into a domain component or partial component match.
my $regex = join "[a-zA-Z0-9\-]*", map { quotemeta($_) }
split /\*/, $allowed_domain;
return $href if $host =~ /^$regex$/i;
}
else {
return $href if $host eq lc($allowed_domain);
}
}
RT->Logger->warning("Blocked link: $href");
return '';
},
},
);
=head1 METHODS
=head2 new
Returns a new L<RT::Interface::Web::Scrubber::Restrictive> object.
=cut
sub new {
my $class = shift;
my $self = $class->SUPER::new(@_);
$self->rules(%RULES);
return $self;
}
RT::Base->_ImportOverlays();
1;
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