[Zope] SiteRoot, can i do?????

Hello, I'm trying do that SiteRoot can this : If somebody put 'http://xyz.mydomain.com/Zope" -> The SiteRoot put in all links 'http://xyz.mydomain.com/Zope" but if if somebody put 'https://xyz.mydomain.com/Zope" -> The SiteRoot put in all links 'https://xyz.mydomain.com/Zope" . The second is the new, so can access for http o https at the same contens, and this is very nice. My idea is change the source code of Site Root. It´s possible ?? Somebody can help my? Thanks