Firefox definitely supports rel=prefetch in HTTP Link headers. I believe it also supports other rel types, like stylesheet. The rel=subresource bit is something new.
Supporting the Link header enables web servers to inject <link> tags without modifying the document, which can be useful, especially for intermediaries. -Darin On Wed, Jan 12, 2011 at 5:07 PM, Maciej Stachowiak <m...@apple.com> wrote: > > Do other browsers support these values in the HTTP Link header? Do Web > sites use them? I think the idea of triggering subresource loads from HTTP > headers instead of the HTML itself is problematic. We should support it only > to the degree required for Web compatibility. > > Regards, > Maciej > > On Jan 12, 2011, at 8:05 AM, Gavin Peters (蓋文彼德斯) wrote: > > Folks, > > Right now in WebKit, beforeload events are not universally sent for link > elements. In particular, link elements with the rel type icon, dns-prefetch > and prefetch do not generate beforeload events. In a recent review of bug > 51941, ap raised the question that perhaps they should be sent. It's a good > question! > > As background, I'm right now refactoring the HTMLLinkElement to pull out > the loader that handles the abovementioned three rel types. I'm doing this > in preparation for adding Link header support, initially for these three rel > types, as they are not so controversial as for instance putting > rel=stylesheet in the HTTP headers. > > Then, there's another complication. After the refactoring described in bug > 51941, I'd like to move on and implement the Link header, bug 51940. It's > clear that beforeload won't make sense for the Link header, since we can't > allow JS in HTTP, and we can't delay following the Link until we have > HTML+CSS+JS (since that would defeat the purpose of the HTTP header > providing quick dispatch). As well, I will likely add another rel type > "subresource" to our handling together with the header, which describes > something like a prefetch, but required for the current page. > > So now I see a few questions > > 1. Should HTML Link rel=prefetch have beforeload events? > 2. How about rel=icon and rel=dns-prefetch ? > 3. If the answer to (1) is yes, then should HTTP Link have events? > Really? > 4. Should HTML Link permit rel=subresource? > 5. If the answer to (4) is yes, should HTML Link rel=subresource have > beforeload events? > > what do people think? > > - Gavin > > https://bugs.webkit.org/show_bug.cgi?id=51941 > https://bugs.webkit.org/show_bug.cgi?id=51940 > > > _______________________________________________ > webkit-dev mailing list > webkit-dev@lists.webkit.org > http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev > > > > _______________________________________________ > webkit-dev mailing list > webkit-dev@lists.webkit.org > http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev > >
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