#!/usr/bin/perl -w
use strict;

use LWP::RobotUA;
use HTML::SimpleLinkExtor;
use URI::URL;

use vars qw/$http_ua $link_extractor/;

sub crawl {
    my @queue = @_;
    my %visited;
    my $a = 0;
    my $base;
    while ( my $url = shift @queue ) {
        next if $visited{$url};

        my $content = $http_ua->get($url)->content;

        open FILE, '>' . ++$a . '.txt';
        print FILE "$url\n";
	print FILE $content;
        close FILE;

        print qq{Downloaded: "$url"\n};

        push @queue, do {
            my $link_extractor = HTML::SimpleLinkExtor->new($url);
            $link_extractor->parse($content);
            $link_extractor->a;

        };
        $visited{$url} = 1;
    }
}

$http_ua = new LWP::RobotUA theusefulbot => 'bot@theusefulnet.com';
$http_ua->delay( 10 / 6000 );

crawl(@ARGV);