add error to http request

task/http_request.go

@@ -19,6 +19,14 @@ type HttpRequest[T any] struct {
 	err error
 }
 
+func (r *HttpRequest[T]) Ans() T {
+	return r.ans
+}
+
+func (r *HttpRequest[T]) Err() error {
+	return r.err
+}
+
 func (r *HttpRequest[T]) String() string {
 	return fmt.Sprintf("%+v", r.ans)
 }