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#!/usr/bin/perl -w
# This script cleans up an HTML document.
# Specifically it removes deprecated styling and scripting tags.
use strict;
use HTML::Parser ();
# configure these values
my @ignore_attr =
qw(bgcolor background color face style link alink vlink text
onblur onchange onclick ondblclick onfocus onkeydown onkeyup onload
onmousedown onmousemove onmouseout onmouseover onmouseup
onreset onselect onunload
);
my @ignore_tags = qw(font big small b i);
my @ignore_elements = qw(script style);
# make it easier to look up attributes
my %ignore_attr = map { $_ => 1} @ignore_attr;
sub tag
{
my($pos, $text) = @_;
if (@$pos >= 4) {
# kill some attributes
my($k_offset, $k_len, $v_offset, $v_len) = @{$pos}[-4 .. -1];
my $next_attr = $v_offset ? $v_offset + $v_len : $k_offset + $k_len;
my $edited;
while (@$pos >= 4) {
($k_offset, $k_len, $v_offset, $v_len) = splice @$pos, -4;
if ($ignore_attr{lc substr($text, $k_offset, $k_len)}) {
substr($text, $k_offset, $next_attr - $k_offset) = "";
$edited++;
}
$next_attr = $k_offset;
}
# if we killed all attributed, kill any extra whitespace too
$text =~ s/^(<\w+)\s+>$/$1>/ if $edited;
}
print $text;
}
sub decl
{
my $type = shift;
print shift if $type eq "doctype";
}
sub text
{
print shift;
}
HTML::Parser->new(api_version => 3,
start_h => [\&tag, "tokenpos, text"],
process_h => ["", ""],
comment_h => ["", ""],
declaration_h => [\&decl, "tagname, text"],
default_h => [\&text, "text"],
ignore_tags => \@ignore_tags,
ignore_elements => \@ignore_elements,
)
->parse_file(shift) || die "Can't open file: $!\n";