asp.net core check route attribute in middleware

Question

I'm trying to build some ASP.Net core middleware.

It needs see if the current route is marked as [Authorize].

eg:

public async Task Invoke(HttpContext context)
{
    if(context.Request.Path.Value.StartsWith("/api"))
    {
        // check if route is marked as [Authorize]
        // and then do some logic
    }

    await _next.Invoke(context);
}

Does anyone know how this could be achieved or if it's even possible?

If not, what would be a good alternative approach?

Answer 1

I believe it can be achieved in a middleware class via:

var hasAuthorizeAttribute = context.Features.Get<IEndpointFeature>().Endpoint.Metadata
                .Any(m => m is AuthorizeAttribute);