nginx反向代理获取用户真实Ip地址

nginx做反向代理时，默认的配置后端获取到的Ip地址都来自于nginx，用request.getRemoteAddr();获取到的是nginx的ip地址,而不是用户的真实ip.

1.修改Nginx配置:

    server {
	    listen       80;
	    server_name  jenkins.local.com;
	    location / {
	        proxy_set_header Host $host;
	        proxy_set_header X-Real-IP $remote_addr;
	        proxy_pass http://192.168.10.204:8899;   
	     }
	     error_page   500 502 503 504  /50x.html;
	     location = /50x.html {
	        root   html;
	        index  index.html index.htm index.jsp index.action default.html;
	     }
       	proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
	}

在原来的基础配置上加上后三行配置，就可以使用request.getHeader(“x-forwarded-for”)来获取用户真实的Ip地址了
2.java获取客户端Ip

package com.zimax.cqyf.admin.util;

import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;
import java.net.UnknownHostException;
 
/**
 * http工具类
 */
public class HttpUtils {
    /**
     * 获取真实的ip
     * @param request
     * @return
     * @throws UnknownHostException
     */
    public static String getRealIp(HttpServletRequest request){
        String ip;
        // 有的user可能使用代理，为处理用户使用代理的情况，使用x-forwarded-for
        if  (request.getHeader("x-forwarded-for") == null)  {
            ip = request.getRemoteAddr();
        }  else  {
            ip = request.getHeader("x-forwarded-for");
        }
        if  ("127.0.0.1".equals(ip))  {
            try {
                // 获取本机真正的ip地址
                ip = InetAddress.getLocalHost().getHostAddress();
            }catch (Exception e){
                e.printStackTrace();
            }
        }
        return ip;
    } 
}