bububa · January 23, 2014 15:11
diff --git a/gistfile1.txt b/gistfile1.txt
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml">
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 <title>获取内网IP</title>
 </head>
 <body>
 您的内网IP：
 <span id="list"></span>
 <script> 
 // NOTE: window.RTCPeerConnection is "not a constructor" in FF22/23 
 var RTCPeerConnection = /*window.RTCPeerConnection ||*/ window.webkitRTCPeerConnection || window.mozRTCPeerConnection; 
 if (RTCPeerConnection) (function () { 
 var rtc = new RTCPeerConnection({iceServers:[]}); 
 if (window.mozRTCPeerConnection) { // FF needs a channel/stream to proceed 
 rtc.createDataChannel('', {reliable:false}); 
 }; 
 rtc.onicecandidate = function (evt) { 
 if (evt.candidate) grepSDP(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]; }); 
 document.getElementById('list').innerHTML = displayAddrs.join(" or perhaps ") || "n/a"; 
 } 
 function grepSDP(sdp) { 
 var hosts = []; 
 sdp.split('\r\n').forEach(function (line) { // c.f.http://tools.ietf.org/html/rfc4566#page-39 
 if (~line.indexOf("a=candidate")) { //http://tools.ietf.org/html/rfc4566#section-5.13 
 var parts = line.split(' '), //http://tools.ietf.org/html/rfc5245#section-15.1 
 addr = parts[4], 
 type = parts[7]; 
 if (type === 'host') updateDisplay(addr); 
 } else if (~line.indexOf("c=")) { //http://tools.ietf.org/html/rfc4566#section-5.7 
 var parts = line.split(' '), 
 addr = parts[2]; 
 updateDisplay(addr); 
 } 
 }); 
 } 
 })(); else { 
 document.getElementById('list').innerHTML = "<code>ifconfig | grep inet | grep -v inet6 | cut -d\" \" -f2 | tail -n1</code>"; 
 document.getElementById('list').nextSibling.textContent = "In Chrome and Firefox your IP should display automatically, by the power of WebRTCskull."; 
 } 
 </script>
 </body>
 </html>
	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
	<html xmlns="http://www.w3.org/1999/xhtml">
	<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
	<title>获取内网IP</title>
	</head>
	<body>
	您的内网IP：
	<span id="list"></span>
	<script>
	// NOTE: window.RTCPeerConnection is "not a constructor" in FF22/23
	var RTCPeerConnection = /window.RTCPeerConnection \|\|/ window.webkitRTCPeerConnection \|\| window.mozRTCPeerConnection;
	if (RTCPeerConnection) (function () {
	var rtc = new RTCPeerConnection({iceServers:[]});
	if (window.mozRTCPeerConnection) { // FF needs a channel/stream to proceed
	rtc.createDataChannel('', {reliable:false});
	};
	rtc.onicecandidate = function (evt) {
	if (evt.candidate) grepSDP(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]; });
	document.getElementById('list').innerHTML = displayAddrs.join(" or perhaps ") \|\| "n/a";
	}
	function grepSDP(sdp) {
	var hosts = [];
	sdp.split('\r\n').forEach(function (line) { // c.f.http://tools.ietf.org/html/rfc4566#page-39
	if (~line.indexOf("a=candidate")) { //http://tools.ietf.org/html/rfc4566#section-5.13
	var parts = line.split(' '), //http://tools.ietf.org/html/rfc5245#section-15.1
	addr = parts[4],
	type = parts[7];
	if (type === 'host') updateDisplay(addr);
	} else if (~line.indexOf("c=")) { //http://tools.ietf.org/html/rfc4566#section-5.7
	var parts = line.split(' '),
	addr = parts[2];
	updateDisplay(addr);
	}
	});
	}
	})(); else {
	document.getElementById('list').innerHTML = "<code>ifconfig \| grep inet \| grep -v inet6 \| cut -d\" \" -f2 \| tail -n1</code>";
	document.getElementById('list').nextSibling.textContent = "In Chrome and Firefox your IP should display automatically, by the power of WebRTCskull.";
	}
	</script>
	</body>
	</html>