Thanks kappa

As you see, originally I posted a piece of pseudo-code. It described logic. The algorithm. I used perl syntax and made the block into a sub to help you with the actual implementation.

Below is a piece of REAL executable code in realworld perl. It actually crawls the web (provide it with urls in command-line). And I --you, sorry.

Just run it as a separate script, no need to "put it into" your code.

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

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

use vars qw/$http_ua $link_extractor/;

sub crawl {
    my @queue = @_;
    my %visited;

    while(my $url = shift @queue) {
        next if $visited{$url};

        my $content = $http_ua->get($url)->content;
        # do useful things with $content
        # for example, save it into a file or index or whatever
        # i just print the url
        print qq{Downloaded: "$url"\n};

        push @queue,
        do { $link_extractor->parse($content); $link_extractor->a };
        $visited{$url} = 1;
    }
}

$http_ua = new LWP::RobotUA theusefulbot => 'bot@theusefulnet.com';
$link_extractor = new HTML::SimpleLinkExtor;

crawl(@ARGV);
[download]

Thanks so much kappa, i sure wish i could vote more than once for your post. But I have some problems still, how do I make it follow the links it extracts, it just stops. For example, when I start it on wired.com, it creates 77 files and then brings up the command prompt. I have modified your code into this:

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

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

use vars qw/$http_ua $link_extractor/;
my @queue;
@queue = qw ("http://www.wired.com");
sub crawl {
        my $a = 0;
        my %visited;
        my $links;
    my @links;
    while(my $url = shift @queue) {
        next if $visited{$url};

        my $content = $http_ua->get($url)->content;
        open(FILE,">/var/www/data/$a.txt");
    print FILE "$url\n";
    print FILE "$content";
    close(FILE);
        print qq{Downloaded: "$url"\n};

        push @queue,
        do { $link_extractor->parse($content);
    @links = $link_extractor->a };
    foreach $links(@links) {
    unshift @queue, $links;
    }
        $visited{$url} = 1;
    $a++;
    }
}

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

crawl(@ARGV);
[download]

Also, what do I do when the array gets too large?

Thanks again