246131 2022-10-05 19:32:43 -0700 Accept image/jpg for compatibility reasons 2022-10-07 07:38:02 -0700 1 1 1 Unclassified WebKit Images Safari Technology Preview Unspecified Unspecified RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=13154 BrowserCompat, InRadar P2 Normal --- 1 karlcow cdumez annevk cdumez marcosc sabouhallawa webkit-bug-importer oldest_to_newest 1903649 0 karlcow 2022-10-05 19:32:43 -0700 Some servers seems to send JPEG images as `image/jpg` The correct Content Type is `image/jpeg` per RFC. https://www.iana.org/assignments/media-types/media-types.xhtml#image https://www.rfc-editor.org/rfc/rfc2046.html It may create web compatibility breakages. It would be good to assess the level of breakages it creates. * Both Firefox and Chrome accepts `image/jpg` for displaying JPEG images. * Safari is downloading the image. 1903657 1 webkit-bug-importer 2022-10-05 20:10:09 -0700 <rdar://problem/100835192> 1903695 2 karlcow 2022-10-06 02:16:21 -0700 There is history into this: It seems to be available already on iOS. https://searchfox.org/wubkat/rev/e8e9be7353991aee7df45aa62f0e0148f16e6f9f/Source/WebCore/platform/MIMETypeRegistry.cpp#74-93 1903696 3 karlcow 2022-10-06 02:17:09 -0700 Forgotten https://searchfox.org/wubkat/rev/e8e9be7353991aee7df45aa62f0e0148f16e6f9f/Source/WebCore/platform/MIMETypeRegistry.cpp#108-112 1903766 4 annevk 2022-10-06 09:09:13 -0700 I'm actually surprised we don't resort to sniffing here, but I suppose that's because we're given a MIME type? In that case we probably want to claim support for this MIME type even if it's non-standard. HTML could probably be more specific about the MIME types here. It currently has "A supported image, video, or audio type" in the navigate algorithm which isn't great. (Separately it suggests `image/*` are image MIME types for a different algorithm, but claiming all of them might also not be what we want for navigate or what other browsers implement.) https://github.com/web-platform-tests/wpt/pull/30403 has some work-in-progress tests for sniffing-related cases where there's also download-vs-display differences. https://github.com/whatwg/html/issues/7420 discusses a similar issue for XML MIME types. 1903835 5 cdumez 2022-10-06 12:25:07 -0700 Pull request: https://github.com/WebKit/WebKit/pull/5100 1904044 6 ews-feeder 2022-10-07 07:37:59 -0700 Committed 255268@main (0d17dc0c310f): <https://commits.webkit.org/255268@main> Reviewed commits have been landed. Closing PR #5100 and removing active labels.