nginx 反向代理 取得真实IP和域名

      nginx反向代理后，在应用中取得的ip都是反向代理服务器的ip，取得的域名也是反向代理配置的url的域名，解决该问题，需要在nginx反向代理配置中添加一些配置信息，目的将客户端的真实ip和域名传递到应用程序中。

 

     nginx反向代理配置时，一般会添加下面的配置：

      proxy_set_header Host $host;
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header REMOTE-HOST $remote_addr;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

 

其中第一行关于host的配置，是关于域名传递的配置，余下跟IP相关。

Java代码：

  public String getClientIP(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.getRemoteAddr();     }     return ip; }