if set nil, then del

files.go

@@ -70,11 +70,23 @@ func (b *Files) Set(key string, value []byte, ns ...string) error {
 	log.Println("files.Set", ns, key, "to", len(value), value == nil)
 	r := bytes.NewReader(value)
 	if value == nil {
-		r = nil
+		return b.Del(key, ns...)
 	}
 	return b.SetStream(key, r, ns...)
 }
 
+func (b *Files) Del(key string, ns ...string) error {
+	log.Println("files.Del", ns, key)
+	namespace := resolve.Namespace(ns)
+	dir := path.Join(b.root, namespace)
+	path := path.Join(dir, key)
+	err := os.Remove(path)
+	if os.IsNotExist(err) {
+		err = nil
+	}
+	return err
+}
+
 func (b *Files) SetStream(key string, r io.Reader, ns ...string) error {
 	log.Println("files.SetStream", ns, key, "to", r, r == nil)
 	namespace := resolve.Namespace(ns)