[Webkit-unassigned] [Bug 46529] Output X-Purpose header for prefetch requests

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=46529





--- Comment #15 from Alexey Proskuryakov <ap at webkit.org>  2010-09-24 17:19:37 PST ---
A better use case mentioned by Gavin on IRC: servers may return a 500 response to prefetch requests if they are close to being overloaded.

Another use case I can imagine is corporate network monitoring systems, which may want to know whether you actually navigated to a site, or just had it in search results.

Mozilla FAQ <https://developer.mozilla.org/en/Link_prefetching_FAQ> has an answer to how you're supposed to count "real" requests (just send Cache-control: must-revalidate). Personally, I don't find that completely convincing, heavier pages may not support conditional requests at all.

I'm still not convinced that this is a good feature to add. Folks on webkit-dev will certainly have more and better ideas for and against it.

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