web项目获取访问者内网Ip

来源：互联网发布：西安软件新城楼盘编辑：程序博客网时间：2024/06/08 15:27

最近做一个项目，需要收集操作系统的用户的内网ip地址。(由于需要知道哪个员工操作的系统，有的多个员工公用一个账号，所以很多时候不知道到底谁操作的)，所以需要获取内网ip。但是通过常规的request.getHeader(“x-forwarded-for”) 获取到的通常是外网ip。这样整个公司访问系统的ip都一样了。后来想了个办法，通过前端获取用户的内网ip，然后传到后台。
百度了半天，依旧没有找到合适的解决办法，最后还是Google给力。
通过WebRTC可以获取到用户的内网ip和外网Ip，以下是代码

<!DOCTYPE html><html>    <head>        <meta http-equiv="Content-Type" content="text/html; charset=utf-8">    </head>    <body>        <h4>            Demo for:            <a href="https://github.com/diafygi/webrtc-ips">                https://github.com/diafygi/webrtc-ips            </a>        </h4>        <p>            This demo secretly makes requests to STUN servers that can log your            request. These requests do not show up in developer consoles and            cannot be blocked by browser plugins (AdBlock, Ghostery, etc.).        </p>        <h4>Your local IP addresses:</h4>        <ul></ul>        <h4>Your public IP addresses:</h4>        <ul></ul>        <script>            //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;                var useWebKit = !!window.webkitRTCPeerConnection;                //bypass naive webrtc blocking                if(!RTCPeerConnection){                    //create an iframe node                    var iframe = document.createElement('iframe');                    iframe.style.display = 'none';                    //invalidate content script                    iframe.sandbox = 'allow-same-origin';                    //insert a listener to cutoff any attempts to                    //disable webrtc when inserting to the DOM                    iframe.addEventListener("DOMNodeInserted", function(e){                        e.stopPropagation();                    }, false);                    iframe.addEventListener("DOMNodeInsertedIntoDocument", function(e){                        e.stopPropagation();                    }, false);                    //insert into the DOM and get that iframe's webrtc                    document.body.appendChild(iframe);                    var win = iframe.contentWindow;                    RTCPeerConnection = win.RTCPeerConnection                        || win.mozRTCPeerConnection                        || win.webkitRTCPeerConnection;                    useWebKit = !!win.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(useWebKit)                    servers = {iceServers: [{urls: "stun:stun.services.mozilla.com"}]};                //construct a new RTCPeerConnection                var pc = new RTCPeerConnection(servers, mediaConstraints);                function handleCandidate(candidate){                    //match just the IP address                    var ip_regex = /([0-9]{1,3}(\.[0-9]{1,3}){3})/                    var ip_addr = ip_regex.exec(candidate)[1];                    //remove duplicates                    if(ip_dups[ip_addr] === undefined)                        callback(ip_addr);                    ip_dups[ip_addr] = true;                }                //listen for candidate events                pc.onicecandidate = function(ice){                    //skip non-candidate events                    if(ice.candidate)                        handleCandidate(ice.candidate.candidate);                };                //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(){});                //wait for a while to let everything done                setTimeout(function(){                    //read candidate info from local description                    var lines = pc.localDescription.sdp.split('\n');                    lines.forEach(function(line){                        if(line.indexOf('a=candidate:') === 0)                            handleCandidate(line);                    });                }, 1000);            }            //insert IP addresses into the page            getIPs(function(ip){                var li = document.createElement("li");                li.textContent = ip;                //local IPs                if (ip.match(/^(192\.168\.|169\.254\.|10\.|172\.(1[6-9]|2\d|3[01]))/))                    document.getElementsByTagName("ul")[0].appendChild(li);                //assume the rest are public IPs                else                    document.getElementsByTagName("ul")[1].appendChild(li);            });        </script>    </body></html>

有更好方法的大神请多指教

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