#!/usr/bin/perl

# This filter makes plain text URLs which appear in a feed item's description into clickable links.  Definitely works on Twitter feeds.
# Written by Adrianna Pinska
# Licence: GPLv3

while(<>) {
    s#(?<!=")(?<!>)(http[^ <]*)#&lt;a href=&quot;\1&quot;&gt;\1&lt;/a&gt;#g;
    s#(?<=<description>)(http[^ <]*)#&lt;a href=&quot;\1&quot;&gt;\1&lt;/a&gt;#g;
    print $_;
}