How do I find the a referring sites URL in node?

How do I find the a referr开发者_如何学运维ing sites URL in node?

I'm using express, would I find this in the headers on connect or something?

Thanks!

In express 4.x:

req.get('Referrer')

This will also check both spellings of referrer so you do not have to do:

 req.headers.referrer || req.headers.referer

Here is the documentation

If you mean how do you get it when running an express server, then it's done using the header method on your request:

req.headers.referer;
// => "http://google.com"