External URL passing current url

[Ernie Salmon]

Hi,
I require the following. I need to call an external URL from my application and pass a parameter of my current url location. I have achieved part this by using the following.

FacesContext facesContext = FacesContext.getCurrentInstance();
ExternalContext externalCtx = facesContext.getExternalContext();
externalCtx.redirect( url);   

Now I need to add a parameter to the above external url which will pass my current url, so that I can then return to my current application.
So for example say the above url = "www.javaranch.com", i need
to pass a parameter returnurl "http://www.javaranch.com?returnurl=http://java.com" where the returnurl will my current url.

I am trying to construct my current url, but having problems.
I have used

   
FacesContext fc = FacesContext.getCurrentInstance();
HttpServletRequest request = (HttpServletRequest)fc.getExternalContext().getRequest();

Any ideas??
[ November 03, 2008: Message edited by: Ernie Salmon ]