Java 获取真实请求IP

蔚落 2023-09-24 15:06 73阅读 0赞

在使用Nginx或Apache等代理的情况下，需要Nginx或Apache代替客户端去访问服务器。当请求包经过反向代理后，在代理服务器这里这个IP数据包的IP包头做了修改，最终后端WEB服务器得到的数据包的头部源IP地址是代理服务器的IP地址。这样一来，后端服务器的程序就无法获取用户的真实ip。

## 1.nginx中配置 ##

proxy_set_header Host  $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Real-Port $remote_port;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

##  ##

## 2.Apache有代理的情况 ##

vi /usr/local/apache/conf/httpd.conf
    Include conf/extra/httpd-remoteip.conf
    vi /usr/local/apache/conf/extra/httpd-remoteip.conf
    LoadModule remoteip_module modules/mod_remoteip.so 
    RemoteIPHeader X-Forwarded-For 
    RemoteIPinternalProxy 127.0.0.1

X-Real-IP 真实请求IP【Nginx中设置】

X-Forwarded-For IP链，真实IP + , + 代理IP1.... + , + 代理IPN

request.getRemoteAddr() 获取真实IP/代理IP（用户使用代理软件时无法获取真实IP）

## **3. 真实IP获取工具类** ##

import javax.servlet.http.HttpServletRequest;
    import java.net.InetAddress;
    import java.net.UnknownHostException;
    
    public class IPUtil {
    
        /**
         * 真是请求IP
         *
         * @param request
         * @return
         */
        public static String getRealRequestIp(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();
            }
            if (null != ip && ip.contains(",")) {
                ip = ip.substring(0, ip.indexOf(","));
            }
            return ip;
        }
        
    }

##    **4.本机IP获取工具类** ##

import javax.servlet.http.HttpServletRequest;
    import java.net.InetAddress;
    import java.net.UnknownHostException;
    
    public class IPUtil {
        /**
         * 本机IP
         *
         * @return
         * @throws UnknownHostException
         */
        public static String getLocalIp() throws UnknownHostException {
            return InetAddress.getLocalHost().getHostAddress();
        }
    
    }