I have been trying to build in your error checking, as well as tie it into a DBM for when it crashes. Heres what I got:

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

use LWP::RobotUA;
use HTML::SimpleLinkExtor;

use vars qw/$http_ua $link_extractor/;

sub crawl {
    my @queue = @_;
    my %visited;
    my $a = 42464;
    my $base;
    dbmopen(%visited, "visited", 0666);
    while ( my $url = shift @queue ) {
        next if $visited{$url};

        my $response = $http_ua->get($url);
    if ($response->is_success) {
        my $content = $response->content
            open FILE, '>' . ++$a . '.txt';
            print FILE "$url\n";
        print FILE $content;
            close FILE;

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

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

            };
        $visited{$url} = 1;
    } else {
        dbmclose(%visited);
            die $response->status_line;
      }
    }  
    
}

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

crawl(@ARGV);
[download]

This gives me: Can't call method "is_success" without a package or object reference at theusefulbot.pl line 21.

Any Ideas?

Thank you

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