springboot 获取访问接口的请求的IP地址

- 日理万妓 2022-10-30 08:29 174阅读 0赞

package com.yanling.utils;
    
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.util.StringUtils;
    
    import javax.servlet.http.HttpServletRequest;
    import java.net.InetAddress;
    import java.net.UnknownHostException;
    
    
    /**
     * Ip地址
     *
     * @author yanling
     * @date 2021/1/28
     */
    public class IPUtils {
        private static Logger logger = LoggerFactory.getLogger(IPUtils.class);
        private static final String IP_UTILS_FLAG = ",";
        private static final String UNKNOWN = "unknown";
        private static final String LOCALHOST_IP = "0:0:0:0:0:0:0:1";
        private static final String LOCALHOST_IP1 = "127.0.0.1";
    
        /**
         * 获取IP地址
         * 使用Nginx等反向代理软件， 则不能通过request.getRemoteAddr()获取IP地址
         * 如果使用了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP地址，X-Forwarded-For中第一个非unknown的有效IP字符串，则为真实IP地址
         */
        public static String getIpAddr(HttpServletRequest request) {
            String ip = null;
            try {
                //以下两个获取在k8s中，将真实的客户端IP，放到了x-Original-Forwarded-For。而将WAF的回源地址放到了 x-Forwarded-For了。
                ip = request.getHeader("X-Original-Forwarded-For");
                if (StringUtils.isEmpty(ip) || UNKNOWN.equalsIgnoreCase(ip)) {
                    ip = request.getHeader("X-Forwarded-For");
                }
                //获取nginx等代理的ip
                if (StringUtils.isEmpty(ip) || UNKNOWN.equalsIgnoreCase(ip)) {
                    ip = request.getHeader("x-forwarded-for");
                }
                if (StringUtils.isEmpty(ip) || UNKNOWN.equalsIgnoreCase(ip)) {
                    ip = request.getHeader("Proxy-Client-IP");
                }
                if (StringUtils.isEmpty(ip) || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
                    ip = request.getHeader("WL-Proxy-Client-IP");
                }
                if (StringUtils.isEmpty(ip) || UNKNOWN.equalsIgnoreCase(ip)) {
                    ip = request.getHeader("HTTP_CLIENT_IP");
                }
                if (StringUtils.isEmpty(ip) || UNKNOWN.equalsIgnoreCase(ip)) {
                    ip = request.getHeader("HTTP_X_FORWARDED_FOR");
                }
                //兼容k8s集群获取ip
                if (StringUtils.isEmpty(ip) || UNKNOWN.equalsIgnoreCase(ip)) {
                    ip = request.getRemoteAddr();
                    if (LOCALHOST_IP1.equalsIgnoreCase(ip) || LOCALHOST_IP.equalsIgnoreCase(ip)) {
                        //根据网卡取本机配置的IP
                        InetAddress iNet = null;
                        try {
                            iNet = InetAddress.getLocalHost();
                        } catch (UnknownHostException e) {
                            logger.error("getClientIp error: {}", e);
                        }
                        ip = iNet.getHostAddress();
                    }
                }
            } catch (Exception e) {
                logger.error("IPUtils ERROR ", e);
            }
            //使用代理，则获取第一个IP地址
            if (!StringUtils.isEmpty(ip) && ip.indexOf(IP_UTILS_FLAG) > 0) {
                ip = ip.substring(0, ip.indexOf(IP_UTILS_FLAG));
            }
    
            return ip;
        }
    
    }