[Webkit-unassigned] [Bug 188995] iOS 12 WKHTTPCookieStoreObserver does not consistently callback on cookie changes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=188995

--- Comment #1 from Sihui Liu <sihui_liu at apple.com> ---
(In reply to bchenindeed from comment #0)
> Created attachment 348177 [details]
> sample project
> 
> On iOS 12 beta 10 (and earlier), the WKHTTPCookieStoreObserver
> cookiesDidChange method is not being consistently called.
> 
> We use the WKHTTPCookieStoreObserver to synchronize login state.  Our login
> occurs in WKWebView which sets cookies with authentication tokens.  We then
> transfer those cookies to our NSURLSession requests to our direct API.
> 
> As of iOS 12 beta, the WKHTTPCookieStoreObserver, cookiesDidChange method
> seems to be getting called inconsistently.  During debugging (via logs) we
> see it getting called for some initial requests and then it just stops being
> called.
> 
> Attached a sample project that demonstrates issue.  Callback is called on
> initial page load.  When you perform a search, cookies are modified, but the
> observer is never notified.
> 
> Radar: 43691855

Hi Brian, thanks for providing the test case. This is a known issue and it's not a webkit bug. We are working on a fix.

What we found is the cookie was set successfully but notification of changes was not sent, so a workaround may be using [WKHTTPCookieStore getAllCookies:] inside decidePolicyForNavigationRespons?

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