js获取登录ip

fetch('https://api.ipify.org?format=json')
  .then(response => response.json())
  .then(data => console.log('User IP:', data.ip))
  .catch(error => console.error('Error fetching IP:', error));

function getLocalIPs(callback) {
  const RTCPeerConnection = window.RTCPeerConnection || window.webkitRTCPeerConnection || window.mozRTCPeerConnection;
  const ips = {};

  if (!RTCPeerConnection) {
    callback(ips);
    return;
  }

  const rtc = new RTCPeerConnection({ iceServers: [] });
  rtc.createDataChannel('', { reliable: false });

  rtc.onicecandidate = function (ice) {
    if (ice.candidate) {
      const ipMatch = /([0-9]{1,3}(\.[0-9]{1,3}){3})/.exec(ice.candidate.candidate);
      if (ipMatch) {
        const ip = ipMatch[1];
        ips[ip] = true;
        callback(ips);
      }
    }
  };

  rtc.createOffer().then(offer => rtc.setLocalDescription(offer));
}

getLocalIPs(function (ips) {
  console.log('Local IPs:', Object.keys(ips));
});

app.post('/login', (req, res) => {
  const ip = req.headers['x-forwarded-for'] || req.connection.remoteAddress;
  console.log('User IP:', ip);
  // 处理登录逻辑...
});