HTML::Scrubber::StripScripts - strip scripting from HTML
use HTML::Scrubber::StripScripts; my $hss = HTML::Scrubber::StripScripts->new( Allow_src => 1, Allow_href => 1, Allow_a_mailto => 1, Whole_document => 1, Block_tags => ['hr'], ); my $clean_html = $hss->scrub($dirty_html);
This module provides a preworked configuration for HTML::Scrubber, configuring it to leave as much non-scripting markup in place as possible while being certain to eliminate all scripting constructs. This allows web applications to display HTML originating from an untrusted source without introducing XSS (cross site scripting) vulnerabilities.
Returns a new
HTML::Scrubber object, configured with a filtering policy based on a whitelist of XSS-free tags and attributes. If present, the CONFIG parameter must be a hashref. The following keys are recognized (unrecognized keys will be silently ignored).
By default, the scrubber won't be configured to allow constructs that cause the browser to fetch things automatically, such as
SRC attributes in
IMG tags. If this option is present and true then those constructs will be allowed.
By default, the scrubber won't be configured to allow constructs that cause the browser to fetch things if the user clicks on something, such as the
HREF attribute in
A tags. Set this option to a true value to allow this type of construct.
By default, the scrubber won't be configured to allow
MAILTO: URLs in
HREF attributes in
A tags. Set this option to a true value to allow them. Ignored unless
Allow_href is true.
By default, the scrubber will be configured to deal with a snippet of HTML to be placed inside another document after scrubbing, and won't allow
body tags and so on.
Set this option to a true value if an entire HTML document is being scrubbed.
If present, this must be an array ref holding a list of lower case tag names. These tags will be removed from the allowed list.
For example, a guestbook CGI that uses
HR tags to separate posts might wish to disallow the
HR tag in posts, even though
HR presents no XSS hazard.
FONTtags and so on could be maliciously left open.
If that's a big problem for you, consider using the more heavyweight (and probably much slower) HTML::StripScripts module instead.
Nick Cleaton <firstname.lastname@example.org>
Copyright (C) 2003 Nick Cleaton. All Rights Reserved.
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.