[Webkit-unassigned] [Bug 188198] New: Icecast mp3 streaming audio fails to play in Safari Tech Preview 61

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=188198

            Bug ID: 188198
           Summary: Icecast mp3 streaming audio fails to play in Safari
                    Tech Preview 61
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Macintosh
                OS: Other
            Status: NEW
          Severity: Major
          Priority: P2
         Component: Media Elements
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dsward at arkphone.com

This bug report is based on recent tests of Mojave developer betas running under Parallels VM hosted by High Sierra.  I have not attempted to reproduce the problem on a native installation of Mojave.

In Safari Technology Preview 61 - Version 12.0 (14606.1.30) - and some earlier previews, the audio element fails to play streaming MP3 audio produced from an Icecast streaming server.

To reproduce the problem, visit the Icecast directory for MP3 programs -

http://dir.xiph.org/by_format/MP3

- then choose any MP3 streaming program in the list and click the "M3U" link to start playing audio.

The browser will attempt to load a standalone audio player page, but the playback fails with a message on-screen: "Unsupported Plug-in".

This problem seems to affect recent daily builds of WebKit too.  It also affects Mac apps that use an embedded WebView in Mojave.

The MP3 playback for the test above works correctly in Safari 11.1.2 and earlier versions.

I suspect a factor could be non-secure transport using http scheme instead of https.

I have an open source app that could be affected by this problem - https://github.com/dsward2/LocalRadio

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