Getting IP Address of the remote peer in Websocket API for Java EE 7 - glassfish

Question

How can I get the IP address of the remote peer in Websocket API for Java Glassfish ?

Answer 1

Another method, based on this answer to another question, is to get the headers of the HandshakeRequest. The headers you are looking for are either of the following.
origin: [IP Address]
x-forwarded-for: [Possibly a separate IP]
Just for clarity, here's my setup, and how I discovered this:
Wamp 2.5 on MyMachine:6060. This hosts a client HTML page.
Wamp 2.5 on LabMachine:6060 (normal connections) and LabMachine:6443 (secure connections). This acts as a proxy.
GlassFish 4.0 on MyMachine:8080 (normal) and MyMachine:8181 (SSL). This is the endpoint.
I connected to the client page via my own machine, the lab machine, and a colleague's machine. In every case, the origin header of the WebSocket request was
http://MyMachine:6060
However, in each case the x-forwarded-host header was different, matching the IP addresses of the actual client.

Answer 2

See getRemoteAddr()
You will need to cast your socket Session instance to a TyrusSession, which implements the standard JSR-356 Session interface.
You might need to upgrade Tyrus, as I am not sure if the version you have supports this method. I am using Tyrus 1.7 and it works fine for me. Here is how to upgrade.

Answer 3

WebSockets are based on HTTP requests. Therefore you are probably extending an HttpServlet or a WebSocketServlet somewhere, so the usual way of getting the IP from the HttpServletRequest should work:
Example:
public class WebSocketsServlet extends HttpServlet {
private final WebSocketApplication app = new WebSocketApplication();
#Override
public void init(ServletConfig config) throws ServletException {
WebSocketEngine.getEngine().register(
config.getServletContext().getContextPath() + "/context", app);
}
#Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("IP: " + req.getRemoteAddr());
super.doGet(req, resp);
}
}