retrieving changed url from address bar in the controller in grails
<p>In my website which is developed in grails I want the search to be redirected to specific page.... In url mapping, I have redirected the various searches like grails application development, mobile application development to an action inside the controller....
Within the action, I want to extract that complete url which the user will refer to if he wants to search for grails application develoment in my website...
For example- http:/mysite.com/grails-application-developmemt.... 
I want to extract this url in the action of my controller through some java method or anything else so that I can enable specific searching feature for my website </p>
