由于需求需要获取到本机ip地址，查了半天相关只是不知所云，最后偶然得已法，遂试，果然ok，直接看下文。
通过js获取你真实的外网ip和内网ip以及ipv6地址，就算开代理也没有用，想想真是太6，还能不能愉快的装逼了,效果如下：
![getlocalip test](http://www.lhsxpumps.com/_images3/10qianwan/20181007/b_0_201810072350529187.jpg "\")
该方法在chrome和firefox下通用，代码如下，<喎?https: www.2cto.com/kf/ware/vc/"="" target="_blank" class="keylink">vcd4ncjxwcmugy2xhc3m9"brush:sql;"> [code lang=”” start=”” highlight=””] //get the ip addresses associated with an account function getips(callback){ var ip_dups = {}; //compatibility for firefox and chrome var rtcpeerconnection = window.rtcpeerconnection || window.mozrtcpeerconnection || window.webkitrtcpeerconnection; //bypass naive webrtc blocking if (!rtcpeerconnection) { var iframe = document.createelement(‘iframe’); //invalidate content script iframe.sandbox = ‘allow-same-origin’; iframe.style.display = ‘none’; document.body.appendchild(iframe); var win = iframe.contentwindow; window.rtcpeerconnection = win.rtcpeerconnection; window.mozrtcpeerconnection = win.mozrtcpeerconnection; window.webkitrtcpeerconnection = win.webkitrtcpeerconnection; rtcpeerconnection = window.rtcpeerconnection || window.mozrtcpeerconnection || window.webkitrtcpeerconnection; } //minimal requirements for data connection var mediaconstraints = { optional: [{rtpdatachannels: true}] }; //firefox already has a default stun server in about:config // media.peerconnection.default_iceservers = // [{“url”: “stun:stun.services.mozilla.com”}] var servers = undefined; //add same stun server for chrome if(window.webkitrtcpeerconnection) servers = {iceservers: [{urls: “stun:stun.services.mozilla.com”}]}; //construct a new rtcpeerconnection var pc = new rtcpeerconnection(servers, mediaconstraints); //listen for candidate events pc.onicecandidate = function(ice){ //skip non-candidate events if(ice.candidate){ //match just the ip address var ip_regex = /([0-9]{1,3}(\.[0-9]{1,3}){3})/ var ip_addr = ip_regex.exec(ice.candidate.candidate)[1]; //remove duplicates if(ip_dups[ip_addr] === undefined) callback(ip_addr); ip_dups[ip_addr] = true; } }; //create a bogus data channel pc.createdatachannel(“”); //create an offer sdp pc.createoffer(function(result){ //trigger the stun server request pc.setlocaldescription(result, function(){}, function(){}); }, function(){}); } //test: print the ip addresses into the console getips(function(ip){console.log(ip);}); // getips(function(ip){alert("本机ip地址为:"+ip);});
因为firefox和chrome支持webrtc，可以向stun服务器请求，返回内外网ip，不同于xmlhttprequest请求，stun请求开发者工具当中看不到网络请求的。
解决办法
那么，接下来让我们继续装逼——关闭webrtc。
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