java-code:
public String getRemoteIP(HttpServletRequest request) {
String clientIp = request.getHeader("x-forwarded-for");
if (clientIp == null || clientIp.length() == 0 || "unknown".equalsIgnoreCase(clientIp)) {
clientIp = request.getHeader("Proxy-Client-IP");
}
if (clientIp == null || clientIp.length() == 0 || "unknown".equalsIgnoreCase(clientIp)) {
clientIp = request.getHeader("WL-Proxy-Client-IP");
}
if (clientIp == null || clientIp.length() == 0 || "unknown".equalsIgnoreCase(clientIp)) {
clientIp = request.getRemoteAddr();
}
return clientIp;
}