On Tue, 18 Jun 2002, Dieter Maurer wrote:
Wei He writes:
... 2. From the website developers' point of view, there are already many guidlines on how to create a good webpage. Among them are using the HTTP Last-modification header to take the advantages of client cache. I think you overestimate the importance of accurate "Last-Modified" headers.
Perhaps. But I think Etag, If-Modified-Since or whatever headers only make sense to a cache server that is designed to use these values, not for a generic one or the end users browser clients. And the last one is the real place caching-related headers making sence to. If I understand correctly, the Expires header can only give the client an impression how ofter a page is updated.
I would use "Expires" and "Cache-Control" for cache control.
Only when you want to disable the cache function, can these two headers be useful. Wei He