Regexp::Common won't help much for your purpose here:
$ perl -le '
   use Regexp::Common qw(URI);
   $_ = "http://www.example.com/ciao,";
   s/$RE{URI}{HTTP}/doh!/;
   print
'
doh!

[download]
I elaborated a bit about it here.

Flavio
perl -ple'$_=reverse' <<<ti.xittelop@oivalf

Don't fool yourself.

In reply to Re^2: detecting URLs and turning them into links by polettix
in thread detecting URLs and turning them into links by keiusui

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