A URL Normalizer

Rules:

1. Convert the scheme and host to lower case.
2. Remove duplicate slashes. Two adjacent slashes within a URL path should be converted to a single slash.
3. Remove default directory indexes. The default directory indexes, default.asp, index.html, index.htm, index.php, index.shtml should be removed from URLs.
4. Remove default ports. The default port 80 for http and 443 for https should be removed from URLs.
5. Remove dot-segments. The segments .. and . should be removed from URLs.

Prerequisites:

1. Enable CGI in Apache: sudo a2enmod cgi.

Required Perl Modules:

1. CGI: To install, run sudo perl -MCPAN -eshell, then install CGI.
2. LWP::Simple: To install, run sudo apt-get install libwww-perl.