从Request获取客户端的IP

最新推荐文章于 2023-12-19 10:43:19 发布

niuhea

最新推荐文章于 2023-12-19 10:43:19 发布

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分类专栏： Web Service

本文链接：https://blog.youkuaiyun.com/niuhea/article/details/21240529

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本文详细介绍了在处理HTTP请求时如何从Request对象中准确获取客户端的真实IP地址，包括代理服务器情况下的处理策略和常见问题解析。

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如题：

 private String getIpAddr(HttpServletRequest request) {
  String ipAddress = null;
  // ipAddress = this.getRequest().getRemoteAddr();
  ipAddress = request.getHeader("x-forwarded-for");
  if (ipAddress == null || ipAddress.length() == 0
    || "unknown".equalsIgnoreCase(ipAddress)) {
   ipAddress = request.getHeader("Proxy-Client-IP");
  }
  if (ipAddress == null || ipAddress.length() == 0
    || "unknown".equalsIgnoreCase(ipAddress)) {
   ipAddress = request.getHeader("WL-Proxy-Client-IP");
  }
  if (ipAddress == null || ipAddress.length() == 0
    || "unknown".equalsIgnoreCase(ipAddress)) {
   ipAddress = request.getRemoteAddr();
   if (ipAddress.equals("127.0.0.1")) {
    // 根据网卡取本机配置的IP
    InetAddress inet = null;
    try {
     inet = InetAddress.getLocalHost();
    } catch (UnknownHostException e) {
     e.printStackTrace();
    }
    ipAddress = inet.getHostAddress();
   }

  }

  if (ipAddress != null && ipAddress.length() > 15) { // "***.***.***.***".length()
               // = 15
   if (ipAddress.indexOf(",") > 0) {
    ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
   }
  }
  return ipAddress;
 }