I hope I understand your question correctly, if I have missed the point msg me or follow up and I will try and help some more.

Its coded in the url http://<Host:Port>/Resource .. parse the url with a regexp or use URI::URL Which is part of libwww-perl I have not used URI::URL before but a quick search finds that it has been mentioned on pm lots of times .. checkout super search search for URI::URL.

You are looking for something like (ripped from the pod)

use URI::URL;
$url = new URI::URL 'http://www.perl.com/%Euser/gisle.gif';
# Retrieving Network location (netloc) components:
 $user     = $url->user;
 $password = $url->password;
 $host     = $url->host;
 $port     = $url->port;   # returns default if not defined
[download]

There are lots of other permutations so take a look at the links above.
--

Zigster