通过NodeJS Express仅获取IPv4 ips [英] Get only IPv4 ips via NodeJS express

问题描述

我在 Centos NodeJS express 服务>并监听GET请求，我需要识别用户的IP。

I have a NodeJS express service running on Centos and listens to GET requests and I need to identify the IP of the user.

当前，我正在使用此脚本

Currently, I'm using this script

ip = req.headers['x-forwarded-for'] ||
      req.connection.remoteAddress ||
      req.socket.remoteAddress ||
      req.connection.socket.remoteAddress

问题是有时返回的IP是IPv4有时是IPv6。有没有办法只获取IPv4 IP？

The problem is that sometimes the IP returned is IPv4 and sometimes it is IPv6. Is there a way to get only IPv4 IPs?

推荐答案

更新

根据Micheal的评论，如果客户端通过ipv6连接，则不会有ipv4地址，因此您必须准备好接受ipv6。

Base on Micheal's comment, if client is connected via ipv6 there will not be an ipv4 address, so you must be ready to accept ipv6.

在服务器上侦听时指定ipv4，请参见 doc

specify ipv4 when you listen on the server see doc

.listen(port, '0.0.0.0');

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