[Webkit-unassigned] [Bug 190358] New: Recovering tab from Force Quit clears response and request headers

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=190358

            Bug ID: 190358
           Summary: Recovering tab from Force Quit clears response and
                    request headers
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: All
                OS: macOS 10.14
            Status: NEW
          Severity: Major
          Priority: P2
         Component: Page Loading
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mike.smart+webkit-bugzilla at n26.com
                CC: beidson at apple.com

Created attachment 351787

  --> https://bugs.webkit.org/attachment.cgi?id=351787&action=review

Network request of a document restored by Safari

When restoring Safari (latest on iOS, OSX + technology preview) from a POST request, after a Force Quit (or on iOS closing via the app switcher) causes all response data (headers, status, source) to be missing.

Steps to reproduce:
1. Log into https://bugs.webkit.org
2. Force Quit Safari
3. Open safari

Expected behaviour:
New headers are sent/returned from the document request

Actual behaviour:
This is missing

Impact:

All sites that rely on cookies for security (CSRF, encryption token, etc.) would not have this present and the user needs to navigate away and come back, a refresh does not fix this.

It's entirely possible this is a new security feature, but it's breaking existing behaviour.

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