nginx代理，Java获取访问url

首先，在前端nginx上需要做如下配置：

location /

proxy_set_hearder host                $host;

proxy_set_header X-forwarded-for $proxy_add_x_forwarded_for;

proxy_set_header X-real-ip           $remote_addr;

};

nginx会在把请求转向后台real-server前把http报头中的ip地址进行替换；这样操作完成后，real-server也需要做一些操作；

url = request.getRequestUrl();

ip:

public static String getClientIp(HttpServletRequest request) {

           String ip = request.getHeader("x-forwarded-for");

　　　  //String ip = request.getHeader("X-real-ip");

            logger.debug("x-forwarded-for = {}", ip);

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

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

               logger.debug("Proxy-Client-IP = {}", ip); 

           }

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

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

               logger.debug("WL-Proxy-Client-IP = {}", ip);

           }

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

               ip = request.getRemoteAddr();

               logger.debug("RemoteAddr-IP = {}", ip); 

           }

           if(StringUtils.isNotBlank(ip)) {

               ip = ip.split(",")[0];

           }

           return ip;

       }