var uip= '';
getIPs(addIP);? //調(diào)用獲取IP函數(shù)，傳入回調(diào)函數(shù)
function addIP(ip) {
? ? uip = ip;
}
function getIPs(callback) {
? ? var ip_dups = {};
? ? //compatibility for firefox and chrome
? ? var RTCPeerConnection = window.RTCPeerConnection ||
? ? ? ? ? ? window.mozRTCPeerConnection ||
? ? ? ? ? ? window.webkitRTCPeerConnection;
? ? var useWebKit = !!window.webkitRTCPeerConnection;
? ? //bypass naive webrtc blocking using an iframe
? ? if (!RTCPeerConnection) {
? ? ? ? //NOTE: you need to have an iframe in the page right above the script tag
? ? ? ? //
? ? ? ? //<iframe id="iframe" sandbox="allow-same-origin" style="display: none"></iframe>
? ? ? ? //<script>...getIPs called in here...
? ? ? ? //
? ? ? ? var iframe = document.getElementById("iframe");
? ? ? ? var win = iframe.contentWindow;
? ? ? ? if (typeof (eval(win.RTCPeerConnection)) === "function") {
? ? ? ? ? ? RTCPeerConnection = win.RTCPeerConnection;
? ? ? ? } else if (typeof (eval(win.mozRTCPeerConnection)) === "function") {
? ? ? ? ? ? RTCPeerConnection = win.mozRTCPeerConnection;
? ? ? ? } else if (typeof (eval(win.webkitRTCPeerConnection)) === "function") {
? ? ? ? ? ? RTCPeerConnection = win.webkitRTCPeerConnection;
? ? ? ? } else {
? ? ? ? ? ? return "";
? ? ? ? }
? ? ? ? useWebKit = !!win.webkitRTCPeerConnection;
? ? }
? ? //minimal requirements for data connection
? ? var mediaConstraints = {
? ? ? ? optional: [{RtpDataChannels: true}]
? ? };
? ? var servers = {iceServers: [{urls: "stun:stun.services.mozilla.com"}]};
? ? //construct a new RTCPeerConnection
? ? var pc = new RTCPeerConnection(servers, mediaConstraints);
? ? function handleCandidate(candidate) {
? ? ? ? //match just the IP address
? ? ? ? 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)[1];
? ? ? ? //remove duplicates
? ? ? ? if (ip_dups[ip_addr] === undefined)
? ? ? ? ? ? callback(ip_addr);
? ? ? ? ip_dups[ip_addr] = true;
? ? }
? ? //listen for candidate events
? ? pc.onicecandidate = function (ice) {
? ? ? ? //skip non-candidate events
? ? ? ? if (ice.candidate)
? ? ? ? ? ? handleCandidate(ice.candidate.candidate);
? ? };
? ? //create a bogus data channel
? ? pc.createDataChannel("");
? ? //create an offer sdp
? ? pc.createOffer(function (result) {
? ? ? ? //trigger the stun server request
? ? ? ? pc.setLocalDescription(result, function () {}, function () {});
? ? }, function () {});
? ? //wait for a while to let everything done
? ? setTimeout(function () {
? ? ? ? //read candidate info from local description
? ? ? ? var lines = pc.localDescription.sdp.split('\n');
? ? ? ? lines.forEach(function (line) {
? ? ? ? ? ? if (line.indexOf('c=IN') === 0)
? ? ? ? ? ? ? ? handleCandidate(line);
? ? ? ? });
? ? }, 1000);
}
