var filePath = GetOutputFilePath(context);

      var response = context.HttpContext.Response;

      if (!response.Body.CanRead || !response.Body.CanSeek) {

        using (var ms = new MemoryStream()) {

          var old = response.Body;

          response.Body = ms;

          await base.OnResultExecutionAsync(context, next);

          if (response.StatusCode == 200) {

            await SaveHtmlResult(response.Body, filePath);

          }

          ms.Position = 0;

          await ms.CopyToAsync(old);

          response.Body = old;

        }

      } else {

        await base.OnResultExecutionAsync(context, next);

        var old = response.Body.Position;

        if (response.StatusCode == 200) {

          await SaveHtmlResult(response.Body, filePath);

        }

        response.Body.Position = old;

      }