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

[bugzilla-daemon at webkit.org]

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

            Bug ID: 188995
           Summary: iOS 12 WKHTTPCookieStoreObserver does not consistently
                    callback on cookie changes
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit API
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: bchenindeed at gmail.com

Created attachment 348177

  --> https://bugs.webkit.org/attachment.cgi?id=348177&action=review

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

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