[Webkit-unassigned] [Bug 153230] Network cache: old pages returned by disk cache on history navigation after session is restored

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=153230

--- Comment #6 from Chris Dumez <cdumez at apple.com> ---
(In reply to comment #5)
> (In reply to comment #4)
> > Chris, are you open to adding an option for API users to choose the desired
> > behavior here?
> 
> It's not just a matter of adding API, we need a way to figure out when you
> are doing a history navigation of an items restored from the session or not.
> It's obvious in the case of the first navigation after a session restore,
> but then you could go back/forward on any webview and you don't know if the
> item you are going to was restored from the session or not.

I personally do not understand the history navigation problem. On history navigation, we always returned potentially stale data. I don't think it matters if the history navigation happened after a session restore or not (or I misunderstood something).

About the Restoring from cache on session restore. we could support both behavior with a setting if needing (basically rolling out http://trac.webkit.org/changeset/181815 and making it conditional based on the new setting). To my knowledge, Safari 9 shipped with this behavior (session restore from the cache). There has not been much push back so far so I am not planning to go back to the previous behavior at this point. If there is push back though, we could restore the previous behavior on desktop.

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