private static Task <FilterResult> ExecuteFilter(IServiceProvider serviceProvider, FilterAttribute attribute, MiddlewareData data)
{
if (attribute is IFilter filter)
{
return(filter.FilterAsync(attribute, data));
}
var filterImplementationAttribute = attribute.GetType().GetTypeInfo().GetCustomAttribute <FilterImplementationAttribute>();
if (filterImplementationAttribute != null)
{
var instance = (IFilter)serviceProvider.GetInstance(filterImplementationAttribute.ImplementationType);
return(instance.FilterAsync(attribute, data));
}
throw new InvalidOperationException("Cannot invoke filter " + attribute.GetType());
}
private IEnumerable<IActionFilter> ActionFiltersOf(FilterAttribute attribute)
{
var filterType = typeof (IActionFilter<>).MakeGenericType(attribute.GetType());
return _serviceProvider.Invoke(filterType);
}