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NAMEHTML::EscapeEvil - Escape tag VERSION0.05 SYNPSIS use HTML::EscapeEvil;
my $escapeevil = HTML::EscapeEvil->new;
my $evil_html = <<HTML;
<script type="text/javascript">
<!--
alert("script is evil tags!!");
//-->
</script>
<iflame src="deny.html" width="100" height="100"></iframe>
HTML
$escapeevil->parse($html); #from string
$escapeevil->parse_file($html_file); #from file or file handle
my $clean_html = $escapeevil->filtered_html;
$escapeevil->clear;
DESCRIPTIONThe tag that doesn't want to permit escapes all. METHODnewcreate instance Example : my $escapeevil = HTML::EscapeEvil->new(
allow_comment => 1,
allow_declaration => 0,
allow_process => 0,
allow_tags => [qw(a l l o w t a g s)],
#allow_tags => "one",# OK
);
Option : allow_comment : allow comment. default 0. allow_declaration : allow_declaration. default 0. allow_process : allow_process. default 0. allow_tags : set allow tags allow_script : allow script tag. default 0(is_allow_tags("script") OK) allow_style : allow style tag. default 0(is_allow_tags("style") OK) allow_entity_reference : allow entity reference. default 1 collection_process : collection process. default 0 When tag is not specified for allow_tags, default makes all tag invalid. set_allow_tagsThe setting is returned to default. Example : $escapeevil->set_allow_tags(qw(t a g s)); add_allow_tagsThe tag that wants to permit is added. Example : $escapeevil->add_allow_tags(qw(t a g s)); deny_tagsThe specified tag is not permitted. Example : $escapeevil->deny_tags(qw(t a g s)); get_allow_tagsThe list of the tag that has been permitted is returned. Example : my @list = $escapeevil->get_allow_tags; is_allow_tagsWhether it is tag that has been permitted is checked. Example : print 'script is ', ($escapeevil->is_allow_tags('script')) ? 'allowed' : 'not allowed';
deny_allNo permission of all Example : $escapeevil->deny_all; allow_commentWhether the comment has been permitted is checked. Or, the setting change of the comment permission. Example : print 'comment is ', ($escapeevil->allow_comment) ? 'allowed' : 'not allowed';
$escapeevil->allow_comment(1); ## allow comment!
allow_declarationWhether the DOCTYPE declaration has been permitted is checked. Or, the setting change of the DOCTYPE declaration permission. Example : print 'declaration is ', ($escapeevil->allow_declaration) ? 'allowed' : 'not allowed';
$escapeevil->allow_declaration(1); ## allow declaration!
allow_processWhether the processing instruction has been permitted is checked. Or, the setting change of the processing instruction. Example : print 'process is ', ($escapeevil->allow_process) ? 'allowed' : 'not allowed';
$escapeevil->allow_process(1); ## allow process!
allow_entity_referenceWhether the substance reference has been permitted is checked. Or, the setting change of the substance reference. Example : print 'entity_reference is ', ($escapeevil->allow_entity_reference) ? 'allowed' : 'not allowed';
$escapeevil->allow_entity_reference(1); ## allow entity_reference!
allow_scriptWhether it permits is checked script tag. Or, the setting change of script tag. Example : print 'script is ', ($escapeevil->allow_script) ? 'allowed' : 'not allowed';
$escapeevil->allow_script(1); ## allow script!
allow_styleWhether it permits is checked style tag. Or, the setting change of style tag. Example : print 'style is ', ($escapeevil->allow_style) ? 'allowed' : 'not allowed';
$escapeevil->allow_style(1); ## allow style!
collection_processThe setting change whether to collect process is done. Or, a present setting is acquired. Example : print 'collection_process is ', ($escapeevil->collection_process) ? 'collection' : 'no collection';
$escapeevil->collection_process(1); ##colloction process!
processesThe reference of the array of the processing instruction list is acquired. (reading exclusive use) Example : foreach(@{$escapeevil->processes}){
my $process = $_;
#example: eval $process ,system $process etc..
}
filtered_htmlHTML that escapes in the tag not permitted is returned. Example : print $escapeevil->filetered_html; filtered_fileHTML that escapes in the tag not permitted is written file. Example : (e.g.1)
$escapeevil->filtered_file("./filtered_file.html");
(e.g.2)
$escapeevil->filtered_file(*FILEHANDLE);
filteredversion 0.02 new method. parse(parse_file) and filtered_html(filtered_file) and eof,clear_process do. Example : my $html = "<script type=\"text/javascript\"><!--alert(\"hello!\");//--></script>";
(e.g.1)
my $cleanhtml = $escapeevil->filtered($html);
(e.g.2)
$escapeevil->filtered($html,"writefile.html");
(e.g.3)
open FILEHANDLE,"< evil.html" or die $!;
$escapeevil->filtered(*FILEHANDLE,"writefile.html");
clear_processCollected process is annulled. Example : $escapeevil->clear_process; clearInitialization of variable that liberates of HTML::Parser object and is internal. Please execute it when processing is completed. Example : $escapeevil->clear; NEW OPTIONVERSION 0.03.Javascript of event handler becomes invalid at allow_script(0) though event handler of javascript is defined in the tag that has been permitted, too. Example : <a href="javascript:alert(1234)">hello</a> => <a href="javascript:void(0)">hello</a>
<body onload="alert(5678)"> => <body onload="void(0)">
The definition of event handler is described in %HTML::Escape::JS_EVENT. CAUTIONPlease filtered_file must specify passing the file and specify the correct one. Die is executed when there are neither passing nor a writing authority that cannot be. Processes is a method only for reading. When the value is set, die is done. Carp http://search.cpan.org/~nwclark/perl-5.8.8/lib/Carp.pm Class::Accessor http://search.cpan.org/~kasei/Class-Accessor-0.22/lib/Class/Accessor.pm HTML::Element http://search.cpan.org/~petdance/HTML-Tree-3.1901/lib/HTML/Element.pm HTML::Filter http://search.cpan.org/~gaas/HTML-Parser-3.46/lib/HTML/Filter.pm HTML::Parser http://search.cpan.org/~gaas/HTML-Parser-3.46/Parser.pm SEE ALSOCarp Class::Accessor HTML::Element HTML::Filter HTML::Parser AUTHORAkira Horimoto <kurt0027@gmail.com> COPYRIGHTCopyright (C) 2006 Akira Horimoto This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
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