[Webkit-unassigned] [Bug 232506] New: [iOS] Need API for marking file requests as non-app-initiated

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=232506

            Bug ID: 232506
           Summary: [iOS] Need API for marking file requests as
                    non-app-initiated
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Page Loading
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ajuma at chromium.org
                CC: beidson at apple.com, bfulgham at webkit.org,
                    justincohen at google.com, katherine_cheney at apple.com,
                    rohitrao at google.com

Chrome for iOS uses a file-based session restoration approach for cases where [WKWebView setInteractionState:] cannot be used. These cases include syncing tabs across devices, reopening closed tabs (i.e., where the user closes a tab, but decides later that they want the tab back), and users upgrading from iOS 14.

Network requests in such tabs should be marked as non-app-initiated, but there's currently no way to set request attribution for file requests. The result is that all back/forward and link-tap navigations in such tabs get marked as app-initiated, until the next call to [WKWebView loadRequest:] (in practice, this means that all navigation is marked as app-initiated until the next time the user types a URL in the URL bar instead of tapping on links).

Specifically:
1) [WKWebView loadFileRequest:allowingReadAccessToURL:] only looks at the URL in the given request, and ignores everything else, including the request's |attribution| property.

2) [WKWebView loadFile:allowingReadAccessToURL:] doesn't have any way to set attribution.

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