[Route("api/[controller]/[action]")]
[AllowAnonymous]
[ApiController]
[ControllerName("Attributes")]
public class InfoController : ControllerBase
{
    private readonly IEnumerable<EndpointDataSource> _endpointSources;

    public InfoController(IEnumerable<EndpointDataSource> endpointSources)
    {
        _endpointSources = endpointSources;
    }

    [HttpGet]
    public async Task<ActionResult> ListAllEndpoints()
    {
        var endpoints = _endpointSources
            .SelectMany(es => es.Endpoints)
            .OfType<RouteEndpoint>();
        var output = endpoints.Select(
            e =>
            {
                var controller = e.Metadata
                    .OfType<ControllerActionDescriptor>()
                    .FirstOrDefault();
                var action = controller != null
                    ? $"{controller.ControllerName}.{controller.ActionName}"
                    : null;
                var controllerMethod = controller != null
                    ? $"{controller.ControllerTypeInfo.FullName}:{controller.MethodInfo.Name}"
                    : null;
                return new
                {
                    Method = e.Metadata.OfType<HttpMethodMetadata>().FirstOrDefault()?.HttpMethods?[0],
                    Route = $"/{e.RoutePattern.RawText.TrimStart('/')}",
                    Action = action,
                    ControllerMethod = controllerMethod
                };
            }
                                     );

        return Ok(output);
    }
}