如何在 ASP.NET Core 的 ActionExecutingContext 中检查 AllowAnonymousAttribute？

ActionExecutingContext给你ActionDescriptor。从那里，您可以检查AllowAnonymousAttribute.

class MyFilter: IAsyncActionFilter
{
    public Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next)
    {
        var isAnonymous = context.ActionDescriptor.EndpointMetadata.OfType<AllowAnonymousAttribute>().Any();
        // ...

        return next();
    }
}