In-app handling of SubDomain with GAE

Question

How to handle subdomain in a GAE application? Is it possible that the app to distinguish from:

E.g.

user1.xyz.com and user2.xyz.com ? using Java code? Or should this be done with my domain hosting, like GoDaddy? Or this can be done with a web framework like Spring or Restlet? Or I need to use both (GoDaddy + Spring or Restlet)?

I am using Restlet framework for my web app is it possible to do something like:

public class RootServerResource extends ServerResource {
  @Get("json")
  public String represent() {
    String username = getRequest().getSubDomain(); //  here!
    return "";
  }
}

Here are my questions:

• Is it possible for a single GAE app to handle multiple sub domains?
• If yes, is it possible to to set GAE subdomain to be a wildcard (*)
• Using Restlet how do I achieve to get subdomains?

Answer 1

From the HttpServletRequest class you can use getServerName() to know the hostname that the client requested. See the documentation here.

This question explains how to obtain the HttpServletRequest with Restlet :

You can use the utility class org.restlet.ext.servlet.ServletUtils to get to the HttpServletRequest.

Now the complete code will be :

org.restlet.Request restletRequest = getRequest();
HttpServletRequest servletRequest = ServletUtils.getRequest(restletRequest);
String serverName = servletRequest.getServerName();