js获取ip地址

function getUserIP(onNewIP) { // onNewIp - your listener function for new IPs
//compatibility for firefox and chrome
var myPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection;
// 判断是否IE浏览器
var MSIE = window.navigator.userAgent.indexOf(“MSIE”) >= 1
if (!!window.ActiveXObject || “ActiveXObject” in window || MSIE) {
alert(‘抱歉目前不支持IE浏览器, 请更换’);
} else {
var pc = new myPeerConnection({
iceServers: []
}),
noop = function() {},
localIPs = {},
ipRegex = /([0-9]{1,3}(.[0-9]{1,3}){3}|[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7})/g,
key;

  function iterateIP(ip) {
    if (!localIPs[ip]) onNewIP(ip);
    localIPs[ip] = true;
  }
  //create a bogus data channel
  pc.createDataChannel("");
  // create offer and set local description
  pc.createOffer().then(function(sdp) {
    sdp.sdp.split('\n').forEach(function(line) {
      if (line.indexOf('candidate') < 0) return;
      line.match(ipRegex).forEach(iterateIP);
    });
    pc.setLocalDescription(sdp, noop, noop);
  }).catch(function(reason) {
    // An error occurred, so handle the failure to connect
  });
  //sten for candidate events
  pc.onicecandidate = function(ice) {
    if (!ice || !ice.candidate || !ice.candidate.candidate || !ice.candidate.candidate.match(ipRegex)) return;
    ice.candidate.candidate.match(ipRegex).forEach(iterateIP);
  };
}

}
// Usage
getUserIP(function(ip) {
console.log(ip)
});

来源：CSDN

作者：A-黄泽俊

链接：https://blog.csdn.net/HuangZeJunXXX/article/details/103527096