js 获取服务端ip地址

const express = require('express');
const app = express();

app.get('/', (req, res) => {
  res.setHeader('X-Server-IP', req.ip); // 设置自定义响应头
  res.send('Hello World!');
});

app.listen(3000, () => {
  console.log('Server running on port 3000');
});

fetch('/')
  .then(response => {
    const serverIP = response.headers.get('X-Server-IP');
    console.log('Server IP:', serverIP);
  })
  .catch(error => console.error('Error:', error));

fetch('https://httpbin.org/ip')
  .then(response => response.json())
  .then(data => {
    console.log('Server IP:', data.origin);
  })
  .catch(error => console.error('Error:', error));

function getServerIP(callback) {
  const RTCPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection;
  const pc = new RTCPeerConnection({ iceServers: [] });

  pc.createDataChannel('');

  pc.onicecandidate = event => {
    if (event.candidate) {
      const ipRegex = /([0-9]{1,3}(\.[0-9]{1,3}){3})/;
      const ipAddr = ipRegex.exec(event.candidate.candidate)[1];
      callback(ipAddr);
    }
  };

  pc.createOffer().then(offerDesc => {
    pc.setLocalDescription(offerDesc);
  }).catch(e => console.error(e));
}

getServerIP(ip => {
  console.log('Server IP:', ip);
});