get the remote address of a client in servlet

Вторник, 15 Октября 2013 г. 23:08 + в цитатник

public static String getClientIpAddr(HttpServletRequest request) {  

        String ip = request.getHeader("X-Forwarded-For");  

        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  

            ip = request.getHeader("Proxy-Client-IP");  

        }  

        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  

            ip = request.getHeader("WL-Proxy-Client-IP");  

        }  

        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  

            ip = request.getHeader("HTTP_CLIENT_IP");  

        }  

        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  

            ip = request.getHeader("HTTP_X_FORWARDED_FOR");  

        }  

        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  

            ip = request.getRemoteAddr();  

        }  

        return ip;  

    }