给我推荐5种用js获取ip和mac地址的方法并且写出来

使用HTTP请求头获取IP地址：

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

使用第三方API获取IP地址：

fetch('https://api.ipify.org?format=json')
  .then(response => response.json())
  .then(data => console.log(data.ip));

使用WebRTC获取局域网IP地址：

const pc = new RTCPeerConnection();
pc.createDataChannel('');
pc.createOffer().then(offer => pc.setLocalDescription(offer));
pc.onicecandidate = event => {
  if (event.candidate) {
    const ip = event.candidate.address;
    console.log(ip);
  }
}

使用Node.js的os模块获取MAC地址：

const os = require('os');
const networkInterfaces = os.networkInterfaces();
const macAddress = networkInterfaces['eth0'][0].mac;
console.log(macAddress);

使用第三方库获取MAC地址：

const macaddress = require('macaddress');
macaddress.one((err, mac) => {
  console.log(mac);
});