web获取ip地址

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>

<body>
  <div id="list"></div>
  <script>
    function getYourIP() {
      var RTCPeerConnection = window.RTCPeerConnection || window.webkitRTCPeerConnection || window.mozRTCPeerConnection;
      if (RTCPeerConnection)(function () {
        var rtc = new RTCPeerConnection({
          iceServers: []
        });
        if (1 || window.mozRTCPeerConnection) {
          rtc.createDataChannel('', {
            reliable: false
          });
        };

        rtc.onicecandidate = function (evt) {
          if (evt.candidate) grepSDP("a=" + evt.candidate.candidate);
        };
        rtc.createOffer(function (offerDesc) {
          grepSDP(offerDesc.sdp);
          rtc.setLocalDescription(offerDesc);
        }, function (e) {
          console.warn("offer failed", e);
        });


        var addrs = Object.create(null);
        addrs["0.0.0.0"] = false;

        function updateDisplay(newAddr) {
          if (newAddr in addrs) return;
          else addrs[newAddr] = true;
          var displayAddrs = Object.keys(addrs).filter(function (k) {
            return addrs[k];
          });
          for (var i = 0; i < displayAddrs.length; i++) {
            25
            if (displayAddrs[i].length > 16) {
              displayAddrs.splice(i, 1);
              i--;
            }
          }
          document.getElementById('list').textContent = displayAddrs[0];
        }

        function grepSDP(sdp) {
          var hosts = [];
          sdp.split('\r\n').forEach(function (line, index, arr) {
            if (~line.indexOf("a=candidate")) {
              var parts = line.split(' '),
                addr = parts[4],
                type = parts[7];
              if (type === 'host') updateDisplay(addr);
            } else if (~line.indexOf("c=")) {
              var parts = line.split(' '),
                addr = parts[2];
              updateDisplay(addr);
            }
          });
        }
      })();
      else {
        document.getElementById('list').textContent = "请使用主流浏览器：chrome,firefox,opera,safari";
      }
    }
    getYourIP()
  </script>
</body>

</html>
web获取ip地址

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