#!/usr/bin/perl
# Extract all plain text from an HTML file
use strict;
use warnings;
use Encode ();
use HTML::Parser ();
my %inside;
sub tag {
    my ($tag, $num) = @_;
    $inside{$tag} += $num;
    print " ";    # not for all tags
}
sub text {
    return if $inside{script} || $inside{style};
    print encode('utf8', $_[0]);
}
HTML::Parser->new(
    api_version => 3,
    handlers    => [
        start => [\&tag,  "tagname, '+1'"],
        end   => [\&tag,  "tagname, '-1'"],
        text  => [\&text, "dtext"],
    ],
    marked_sections => 1,
)->parse_file(shift)
    || die "Can't open file: $!\n";