NEW 258412
Streaming Responses generated from a ServiceWorker are mis-reported as 0kb by the download manager on iOS, works correctly on macOS 
https://bugs.webkit.org/show_bug.cgi?id=258412
Summary Streaming Responses generated from a ServiceWorker are mis-reported as 0kb by...
Nathan
Reported 2023-06-22 11:54:21 PDT
Created attachment 466798 [details] Screenshot of the iOS download manager reporting the download size as 0kb instead of reading and reporting the Content-length header For Response's who's bodies are ReadableStreams onn iOS, the file size is reported as 0kb and the progress is shown as indeterminate until the download completes. The downloaded file is usable, so this is a cosmetic bug in the download manager. We have seen bug reports for our app where people mistook this cosmetic bug as a download failure. On macOS, the reported size is correct and the % progress is reported correctly during the download. I've created a demonstration repo which streams a .txt file out as a download which reproduces the problem, and includes screenshots of the download managers for iOS and macOS. https://github.com/shareup/streaming-service-worker-download-content-length-bug Also, thank you all for introducing streaming ServiceWorker downloads in Safari 15.4 ❤️
Attachments
Screenshot of the iOS download manager reporting the download size as 0kb instead of reading and reporting the Content-length header (175.86 KB, image/png)
2023-06-22 11:54 PDT, Nathan 		no flags
Details
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Radar WebKit Bug Importer
Comment 1 2023-06-22 13:02:22 PDT
<rdar://problem/111177426>
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