Search Source IP

Question

I would like to know the source IP address from which the request for my resource came. I have the following two methods for getting it.

String ipAddress = (Series) Request.getCurrent().getAttributes().
                    get("org.restlet.http.headers").getFirstValue("X-Forwarded-For");
String ip = ipAddress.split(" ")[0];

and

List<String> ipsList = Request.getCurrent().getClientInfo().getForwardedAddresses();
String ip = ipsList.get(ipsList.size() - 1);

Two questions:

• Are they correct (does it work)?
• better (if they work, which is better in terms of efficiency / resources / runtime)?