RegExpValidator does not validate a URL pattern correctly

Question

The URL http://www.ftd.de/rss2 is not valid when I check it against the below RegEx in this (unadventurous) :

Answer 1

You can use mx.utils.URLUtil class:

trace(URLUtil.isHttpURL( 'http://www.ftd.de/rss2')); //true

It is also helpful for extracting different parts of url.