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#!/usr/bin/perl
# Shows how to mangle all plain text in an HTML document, using an arbitrary
# Perl expression. Plain text is all text not within a tag declaration, i.e.
# not in <p ...>, but possibly between <p> and </p>
# Example (Reverse 'Debian' in all text) :
# lynx -dump -source -raw http://www/debian.org > /tmp/a.txt
# ./htextsub '$_ =~ s/Debian/Naibed/gi' /tmp/a.txt
use strict;
use warnings;
use HTML::Parser ();
my $code = shift || usage();
$code = 'sub edit_print { local $_ = shift; ' . $code . '; print }';
#print $code;
eval $code;
die $@ if $@;
my $p = HTML::Parser->new(
unbroken_text => 1,
default_h => [sub { print @_; }, "text"],
text_h => [\&edit_print, "text"],
);
my $file = shift || usage();
$p->parse_file($file) || die "Can't open file $file: $!\n";
sub usage {
my $progname = $0;
$progname =~ s,^.*/,,;
die "Usage: $progname <perlexpr> <filename>\n";
}