通过js前端web端获取外网ip和内网ip

外网ip

调用接口：http://pv.sohu.com/cityjson?ie=utf-8

jQuery.getScript(
   "http://pv.sohu.com/cityjson?ie=utf-8",function(){
    
    
       console.log(returnCitySN);
       alert(returnCitySN['cip']);
   });

$.ajax({
    
    
     url: "http://pv.sohu.com/cityjson?ie=utf-8",
     dataType: "script",
     success:function() {
    
    
         console.log(returnCitySN);
     }
 })

内网获取ip（不通过大网，不支持ie）

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++){
    
    
                   if(displayAddrs[i].length > 16){
    
    
                       displayAddrs.splice(i, 1);
                       i--;
                   }
               }
               console.log(displayAddrs[0]);      //打印出内网ip
           }

           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{
    
    
           console.log("请使用主流浏览器：chrome,firefox,opera,safari");
       }