I may not understand you; but do you want essentially a reverse proxy? A way to rewrite the URL to avoid searching; where the client generates page resources, as if it came from the server. What can be used from the IIS Rewrite Module .
However, you can simply create two completely separate sites. Example:
http://www.foo.comhttp://www.foo.com/enhttps://www.foo.com/en <- Logging in as if you are switching to https .
Thus, <sites> point to separate directories, then both are treated as separate objects, so you can create blocked responses on this page so that they are not found in the search engine.
If my answer is off; let me know and i will delete it. But I think this should work; in theory anyway. Squid and Varnish are also applications that were used to create reverse proxies .
source share