nginx後的tomcat獲取真實用戶ip

目前大部分獲取ip的方式：beat.getRequest().getRemoteAddr()
可是，若是經過nginx反向代理的話，就獲取不到真實ip，是獲取的nginx的ip

須要：添加    proxy_set_header  X-Real-IP  $remote_addr; 

 

   server {
        listen       80;
        server_name  price.kuche.com;
        location / {
            root   html;
          proxy_set_header  X-Real-IP  $remote_addr;
            proxy_pass http:backServers;
         }
   }

添加一個表頭聲明

而後這樣取

    public static String getRemoteAddrIp(HttpServletRequest request) {
        String ipFromNginx = getHeader(request, "X-Real-IP");
        System.out.println("ipFromNginx:" + ipFromNginx);
        System.out.println("getRemoteAddr:" + request.getRemoteAddr());
        return StringUtil.isEmpty(ipFromNginx) ? request.getRemoteAddr() : ipFromNginx;
    }


    private static String getHeader(HttpServletRequest request, String headName) {
        String value = request.getHeader(headName);
        return !StringUtils.isBlank(value) && !"unknown".equalsIgnoreCase(value) ? value : "";
    }