[Webkit-unassigned] [Bug 256696] New: Missing progress during ServiceWorker downloads

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=256696

            Bug ID: 256696
           Summary: Missing progress during ServiceWorker downloads
           Product: WebKit
           Version: Safari 16
          Hardware: iPhone / iPad
                OS: iOS 16
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Service Workers
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mrskman at gmail.com

Steps to reproduce:
1) Go to https://stat-info.cz/safari-sw-download-tests.html
2) Start download using Test #1

Download manager now shows 0 kB target file size during the download. It doesn't respect Content-Length header sent from ServiceWorker via Response.

Reproducible on iOS 16.4, 16.2 and 16.1.
Working fine on iOS 15.7.
Working fine in Safari 16.4 on macOS 13.3.1.

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