Application mapping - how do I know it from within the app?

[Johan Fredriksson]

I'm using virtual hosts in my development to make sure that all links are correctly set, that is I can access the same app in two ways, either via   appname.localhost   or   localhost/appname   .   The problem is that I'm not sure how to figure out on a jsp page which entry point was used, and this causes problem when I'm trying to map my servlet, since relative paths to servlets does not seem to work...   String parsing of request.getRequestURI() seems like a way to start, but I'm not sure what how to write it, since in the future the app might be moved again to   appname.serviceprovider.localhost   vs   localhost/serviceprovider/appname   .   Is there a way to get pageContext return application context?       Johan