[Webkit-unassigned] [Bug 177478] New: WKWebView XHR cookies not remembered until app is backgrounded

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=177478

            Bug ID: 177478
           Summary: WKWebView XHR cookies not remembered until app is
                    backgrounded
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: iPhone / iPad
                OS: iOS 11
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit2
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: grant at comfyapp.com

This is related to Bug 140191 but while there seems to be basic cookie access now available in WKWebView, it doesn't work on initial app load.

Steps to Reproduce:
- Create a trivial WKWebView app (mine is a Cordova app using WKWebView)
- In javascript, execute an XHR that receives a session cookie
- Execute another XHR and notice that the session cookie is not sent
- Background, then foreground the app
- Now it will work as expected

I've worked around this by executing an XHR in native code before attempting further XHRs in javascript, but even then, I must wait ~2s before attempting the XHR in javascript. Otherwise the cookies seem to be forgotten again, indefinitely, until either the app is backgrounded or I wait long enough after the native-code XHR.

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