903428 - Webm attachments "details" page lie about browser support

Status: RESOLVED DUPLICATE of bug 670623

(Bugzilla :: Attachments & Requests, defect)

Description

[Kartikaya Gupta (email:[e-mail])]

Attachment: webm.png

See screenshot. If I just click on the attachment directly it plays fine, but going to the "details" page shows an incorrect error message.

Comment 1

[Frédéric Buclin]

That's because we look at the Accept: header to determine if the attachment can be displayed in the browser itself, and video/ is not part of this header. When you look at the attachment directly, we ignore this header, which is why you can view the video.

Comment 2

[Kartikaya Gupta (email:[e-mail])]

I would argue that the Bugzilla behaviour is wrong, then.

Technically FF sends a "*/*" as part of the accept header, which includes video/. I understand that using "*/*" means that you'll just try to display every single attachment, including things like zip files which will throw up download dialogs, and that is undesirable.

However obviously there is some sort of whitelist because text/plain and image/png files show up fine in the "details" page, even though they are not in the accept header either. (My current accept header is "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"). Maybe we just need to add video/webm to the whitelist?