jsp get request ip address

最新推荐文章于 2021-05-12 13:00:36 发布

最新推荐文章于 2021-05-12 13:00:36 发布 · 141 阅读

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本文介绍了一种在Java Web应用中获取客户端真实IP地址的方法。通过检查不同的HTTP头部信息，如'X-Forwarded-For'、'Proxy-Client-IP'等，可以有效地绕过代理服务器并获取到客户端的真实IP地址。

    /* get request IP address */
    public String getIpAddr2(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;
    }