[Webkit-unassigned] [Bug 179220] New: mediaDevices.enumerateDevices(), device ids change on page refresh

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=179220

            Bug ID: 179220
           Summary: mediaDevices.enumerateDevices(), device ids change on
                    page refresh
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Macintosh
                OS: macOS 10.12
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebRTC
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: webkit at xylil.com
                CC: youennf at gmail.com

I've used the following Javascript as a test on Firefox, Chrome, and Safari:

      var constraints = {
        audio: false,
        video: true,
      };
      navigator.mediaDevices.getUserMedia(constraints).then(function(stream) {
        navigator.mediaDevices.enumerateDevices().then(function(devices) {
          devices.forEach(function(device) {
            console.log(device.kind + ": " + device.label + " id = " + device.deviceId);
          });
        });
      }).catch(function(err) {
        console.error("Device access checks failed: ", err, constraints);
      });

Both Firefox and Chrome preserve device ids across page refreshes (further testing with Chrome shows they are preserved even across machine reboots).

However, Safari does not preserve the device ids at all -- they are completely different across page refreshes.

This is problematic, as it makes it much more difficult for applications to 'remember' which devices a user prefers, having to fall back to matching on device.label, which isn't fully reliable.

Confirmed this issue still exists as of r224308.

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