(function(scope){ 'use strict'; imprint.registerTest("localIp", function(){ return new Promise(function(resolve) { try { var RTCPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection; //compatibility for firefox and chrome var pc = new RTCPeerConnection({iceServers:[]}), noop = function(){}; pc.createDataChannel(""); //create a bogus data channel pc.createOffer(pc.setLocalDescription.bind(pc), noop); // create offer and set local description pc.onicecandidate = function(ice) //listen for candidate events { pc.onicecandidate = noop; if(!ice || !ice.candidate || !ice.candidate.candidate) { return resolve(""); } var val = /([0-9]{1,3}(\.[0-9]{1,3}){3}|[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7})/.exec(ice.candidate.candidate)[1]; return resolve(val); }; } catch (e) { return resolve(""); } }); }); })(window);