I am maintaining a Java servlet application and now have to extract the URL from the web service request to determine what action to take depending on what URL called the web service. I have found that it is something to do with HttpServletRequest which I have imported to the class. I have tried setting up the following inside the web service end point but it keeps telling me that the urlrequest is not initialised. What am I doing wrong?

```
HttpServletRequest urlrequest;
StringBuffer url = urlrequest.getRequestURL();

```