JS获取当前IP地址

JS获取当前IP地址

获取客户端公网IP

<script src="http://pv.sohu.com/cityjson?ie=utf-8"></script>
<script type="text/javascript">
    document.write(returnCitySN["cip"]+','+returnCitySN["cname"])
</script>

获取客户端内网IP(IE不支持)

/**
 * 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('
').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){
	document.write(ip)
});

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