[whatwg] Proposal: add attributes etags & last-modified to <link> element.

Julian Reschke julian.reschke at gmx.de
Sun Sep 19 23:05:41 PDT 2010

On 19.09.2010 22:33, Robert O'Callahan wrote:
> ...
> So for example, page A links to resource B. The browser does a GET on A,
> and receives a document containing a <link> to B, and the <link> element
> has etags or last-modified attributes. The browser has a cached resource
> for B, whose etags/last-modified matches the <link> attribute, so the
> browser knows its cached B is valid and no further network transactions
> are required.
> The linked resource B "having the right caching information in the first
> place" (when the browser first fetched it) isn't enough to eliminate the
> need for an HTTP transaction to validate B later.
> ...

Well, it would if the caching information specifies an expiry time 
sufficiently in the future.

Best regards, Julian

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