Is there referrer header within domain while using SSL?
If a website is accessed from a HTTP Secure (HTTPS) connection and a link points to anywhere except another secure location, then the referrer field is not sent.
The upcoming standard HTML5 will support the attribute/value rel = "noreferrer" in order to instruct the user agent not to send a referrer.
Source: http://en.wikipedia.org/wiki/HTTP_referrer
So it seems referrer is not within the domain, but within SSL.
At least Chrome supports now a Meta Tag which explicitly allows to send the Referrer when going from HTTPS to HTTP. Just include the following line in the header:
<meta name="referrer" content="origin">
Here is more Information: http://wiki.whatwg.org/wiki/Meta_referrer
来源：https://stackoverflow.com/questions/7620328/is-there-referrer-header-while-using-ssl