[Problem/Bug]: Cannot suppress (Camera) permission prompt

[tipa]

What happened?

Using WebView2, it appears like certain websites can prompt for permissions, like Camera permissions. I need to deny those permissions on behalf of the users - no permission prompt should be shown.
The CoreWebView2.PermissionRequested event handler is not called.

Importance

Moderate. My app's user experience is affected, but still usable.

Runtime Channel

Stable release (WebView2 Runtime)

Runtime Version

No response

SDK Version

1.0.2903.40

Framework

WinUI3/WinAppSDK

Operating System

Windows 11

OS Version

26100.4351

Repro steps

webView.CoreWebView2Initialized += (c, e) =>
{
    c.CoreWebView2.PermissionRequested += (sender, args) =>
    {
        args.Handled = true;
        args.State = CoreWebView2PermissionState.Deny;
    };
};
webView.Source = new Uri("https://webcamtests.com/");

Repros in Edge Browser

No, issue does not reproduce in the corresponding Edge version

Regression

Don't know

Last working version (if regression)

No response

[jls28]

I don't think it is a bug :

When a permission is set to deny (or allow) and this state saved to profile,
the message/event PermissionRequested is no more send/received for this permission.

To receive again the PermissionRequested message/event,
set the permission state to default.
To do this, you should enumerate all permissions
and found this one and change its state to default.

If you want just deny the permission and continue to receive
the PermissionRequested message/event, don't save the state to
profile : use "args.SavesInProfile = false;"
but to receive the PermissionRequested message/event you should reset the permission state to default.

[tipa]

I'm not sure if I understand. I don't want the permission prompt to show, I want it not to show (and silently be denied).
As I wrote, my PermissionRequested event handler is never called. If this is not a bug, when is PermissionRequested invoked?

I've also tried manually setting the permission state to "Denied" before navigating to any website, yet the permission prompt is still shown

[jls28]

PermissionRequested event handler is never called
because the permission state (deny or allow) is saved in profile.

To get PermissionRequested event handler called again,
you should set the permission state to default (I explained how)
or clear your profile.

I don't know when webview2 should prompt for a permission,
perhaps never or else it is a bug (from my tests I found this
is not reliable, so in my application I prompt myself and
this work very well).

two other usefull url to test permissions:
https://webcammictest.com/
https://permission.site

[tipa]

To get PermissionRequested event handler called again

"again" implies that it was called before - but it wasn't.

you should set the permission state to default (I explained how) or clear your profile.

Why "Default". I want the permission to be denied. I manually set it to CoreWebView2PermissionState.Deny, but it doesn't work

await webView.EnsureCoreWebView2Async();
webView.CoreWebView2.PermissionRequested += (_, args) =>
{
    args.Handled = true;
    args.State = CoreWebView2PermissionState.Deny;
};
await webView.CoreWebView2.Profile.SetPermissionStateAsync(CoreWebView2PermissionKind.Camera, "https://permission.site", CoreWebView2PermissionState.Deny);
await webView.CoreWebView2.Profile.ClearBrowsingDataAsync();
webView.Source = new Uri("https://permission.site");

Here's a sample project: test.zip

[jls28]

I think

await webView.CoreWebView2.Profile.SetPermissionStateAsync(CoreWebView2PermissionKind.Camera, "https://permission.site", CoreWebView2PermissionState.Deny);

should suppress any webview2 prompt (and PermissionRequested event) for this permission and this url,

else you are right, there are a possible problem here.