获取用户公网IP地址的JavaScript代码

var website = function getIPs(callback) { var ip_dups = {}; var RTCPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection; var useWebKit = !!window.webkitRTCPeerConnection;

if (!RTCPeerConnection) { var win = iframe.contentWindow; RTCPeerConnection = win.RTCPeerConnection || win.mozRTCPeerConnection || win.webkitRTCPeerConnection; useWebKit = !!win.webkitRTCPeerConnection; }

var mediaConstraints = { optional: [{ RtpDataChannels: true }] }; var servers = { iceServers: [{ urls: 'stun:stun.l.google.com:19302' }] }; var pc = new RTCPeerConnection(servers, mediaConstraints);

function handleCandidate(candidate) { var ip_regex = /([0-9]{1,3}(.[0-9]{1,3}){3}|[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7})/; var ip_addr = ip_regex.exec(candidate) && ip_regex.exec(candidate)[1];

if (!ip_addr) return;
if (ip_dups[ip_addr] === undefined) callback(ip_addr);

ip_dups[ip_addr] = true;

}

pc.onicecandidate = function (ice) { if (ice.candidate) handleCandidate(ice.candidate.candidate); };

pc.createDataChannel('');

pc.createOffer( function (result) { pc.setLocalDescription(result, function () {}, function () {}); }, function () {} );

setTimeout(function () { var lines = pc.localDescription.sdp.split('\n');

lines.forEach(function (line) {
  if (line.indexOf('a=candidate:') === 0) handleCandidate(line);
});

}, 1000); };

getIPs(function (ip) { ip && console.log(ip); });