[Webkit-unassigned] [Bug 203806] New: FileReader is unable to read file after 1-2 minutes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=203806

            Bug ID: 203806
           Summary: FileReader is unable to read file after 1-2 minutes
           Product: WebKit
           Version: Safari 13
          Hardware: iPhone / iPad
                OS: iOS 13
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mrskman at gmail.com

If you try to read a file from Files app it fails after 1-2 minutes with FileError code 1 (NOT_FOUND_ERR).

How to reproduce:
1) Open https://stat-info.cz/safari-ios13-upload-from-files.html
2) Select Blob size (50 KiB should be enough for 2.5+ MiB files)
3) Click "Choose Files" button -> Browse -> Pick some file from your device
4) Now the script reads the file at rate 1 Blob/s and you can see how it fails after 1-2 minutes.

This problem is not happening if the file is picked up from Photo Library.

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