XMLHttpRequest: upload listener flag not implemented correctly

• Component: DOM
• Status: RESOLVED CONFIGURATION CHANGED

[Anne van Kesteren]

In particular, it seems to be bypassed for same-origin requests, which is unlikely to work well, as same-origin can be redirected to cross-origin.

https://github.com/w3c/web-platform-tests/pull/5122

[Alexey Proskuryakov]

> same-origin can be redirected to cross-origin 

Have we added support for such redirection already? If so, this bug sounds pretty bad.

[youenn fablet]

(In reply to comment #1)
> > same-origin can be redirected to cross-origin 
> 
> Have we added support for such redirection already? If so, this bug sounds
> pretty bad.

Indeed, we need to fix that!

[Ahmad Saleem]

Safari Technology Preview 151 pass all tests, which WPT Pull Request was trying to modifying:

https://wpt.fyi/results/xhr?label=master&label=experimental&aligned&view=subtest&q=event-upload-progress

Is anything else needed? Thanks!

[Alexey Proskuryakov]

Passing these tests is a pretty strong indication that this now works. Maybe fixed in 211702@main?

We have a lot of flakiness, but it's tracked in other bugs already:

LayoutTests/platform/mac-wk1/TestExpectations:1480:webkit.org/b/223944 [ BigSur Debug ] imported/w3c/web-platform-tests/xhr/event-upload-progress.any.html [ Pass Failure ]
LayoutTests/platform/mac/TestExpectations:1969:webkit.org/b/223271 [ Debug ] imported/w3c/web-platform-tests/xhr/event-upload-progress.any.worker.html [ Pass Failure ]
LayoutTests/platform/mac/TestExpectations:2098:webkit.org/b/222385 imported/w3c/web-platform-tests/xhr/event-upload-progress-crossorigin.any.worker.html [ Pass Failure ]
LayoutTests/platform/mac/TestExpectations:2100:webkit.org/b/223804 imported/w3c/web-platform-tests/xhr/event-upload-progress-crossorigin.any.html [ Pass Failure ]