String ip = request.getHeader("x-forwarded-for");
if (null == ip || ip.length() == 0 || "unkown".equalsIgnoreCase(ip)) {
ip = request.getHeader("Proxy-Client-IP");
}
if (null == ip || ip.length() == 0 || "unkown".equalsIgnoreCase(ip)) {
ip = request.getHeader("WL-Proxy-Client-IP");
}
if (null == ip || ip.length() == 0 || "unkown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
}