How to get the IP address when a session is created ?

Question

In my grails application, I have implemented the interface HttpSessionListener to listen for session creation as given below:

class MyHttpSessionListener implements HttpSessionListener {

    public void sessionCreated(HttpSessionEvent event) {
        log.info "***************** Session created: id= ${event.getSession()?.id}"
    }
}

Now, I would like to log the IP address that is responsible for the session creation.

How can I do that?

Answer 1

As far as I know you can't using the HttpSessionListener interface.

You can get and log the IP Address from "ServletRequest.getRemoteAddr()" but you don't have access to the servlet request from HttpSessionListener or from HttpSessionEvent.

Best idea would to have a javax.servlet.Filter which gets the IP address and sets it as a session attribute if not already present. (You could also do the logging if not already present).

Answer 2

you can access the RequestContextHolder and get the value

String ipAddr = ((ServletRequestAttributes)RequestContextHolder.currentRequestAttributes())
           .getRequest().getRemoteAddr();