nodejs获取客户端ip

1、nodejs

//传入请求HttpRequest
function getClientIp(req) {
        return req.headers['x-forwarded-for'] ||
        req.connection.remoteAddress ||
        req.socket.remoteAddress ||
        req.connection.socket.remoteAddress;
}

2、express

// req: 请求HttpRequest
req.ip

上面两种方式获取的IP格式：::ffff:127.0.0.1，

const ip = '::ffff:127.0.0.1'.match(/\d+\.\d+\.\d+\.\d+/)[0]
console.log(ip)

另外可以参考：How to determine a user's IP address in node