I'm interested to know a little more about how stakoverflow manage his HTTP cache strategy.
I see that the pages are supposed to be cached 60 seconds using these headers
Cache-Control: public, max-age=60
Expires: Mon, 15 Nov 2010 17:56:38 GMT
But I also see this header
and According HTTP/1.1 specification
A Vary header field-value of "*" always fails to match and subsequent requests on that resource can only be properly interpreted by the origin server.
According my tests, pages are been cached on my browser despites the . I'd like to know the "vision" of the Stackoverflow team about the HTTP cache strategy. The official word about how cache is supposed to work.
Vary header so I'm a little confused