[javascript] get ip only using javascript

Client

>> 내부 아이피

/**  * Get the user IP throught the webkitRTCPeerConnection  * @param onNewIP {Function} listener function to expose the IP locally  * @return undefined  */ function getUserIP(onNewIP) { //  onNewIp - your listener function for new IPs     //compatibility for firefox and chrome     var myPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection;     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     });     //listen 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){     alert("Got IP! :" + ip); });

>> 외부 아이피

$.getJSON('http://ipinfo.io', function(data){ console.log(data); });

얘들도 답이 없는지 외부 사이트로 xhr 쏜다... jQuery 싫으면 axios로 쏴도된다.

출처 : https://ourcodeworld.com/articles/read/257/how-to-get-the-client-ip-address-with-javascript-only

Server

Routes.route('/testAPI').get(async (req, res) => { const ip = req.connection.remoteAddress.split(':')[req.connection.remoteAddress.split(':').length-1] });

request 헤더 중에 connection.remoteAddress이 있다. ipv6까지 표시해주는거 같은데 필요없으니까 잘라 주려고 split하고 가져온다.

var ip = req.header('x-forwarded-for') || req.connection.remoteAddress;

아니면 그냥 이거 써도 된다.