Hostname and protocol of EP 6 SP2 server

Hi,

I'm trying to programatically construct a URL to the User Mapping iView from a JSPDynPage in EP6 SP2.

I already have the URI pointing to the iView, e.g. /irj/servlet/prt/portal........com.sap.portal.persoUserMapping from the request, but I need the protocol and hostname for the EP server.

How do I obtain these values?

Cheers,

Steve