js获取用户ip地址

js获取用户ip地址

const getIPs = (callback) => {
      var ip_dups = {};
      var RTCPeerConnection = window.RTCPeerConnection|| window.mozRTCPeerConnection|| window.webkitRTCPeerConnection;
      var useWebKit = !!window.webkitRTCPeerConnection;
      var mediaConstraints = {optional: [{ RtpDataChannels: true }]};
      // 这里就是需要的ICEServer了
      var servers = {iceServers: [{ urls: "stun:stun.services.mozilla.com" },{ 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 hasIp = ip_regex.exec(candidate)
        if (hasIp) {
          var ip_addr = ip_regex.exec(candidate)[1];
          if (ip_dups[ip_addr] === undefined)
          callback(ip_addr);
          ip_dups[ip_addr] = true;
        }
      }
      // 网络协商的过程
      pc.onicecandidate = function (ice) {
        if (ice.candidate) {
          handleCandidate(ice.candidate.candidate);
        }
      };
      pc.createDataChannel("");
      //创建一个SDP(session description protocol)会话描述协议 是一个纯文本信息 包含了媒体和网络协商的信息
      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((ip) => {console.log('ip', ip)});