improve cmd

pkg/chain/router.go

@@ -74,9 +74,12 @@ func (r *Router) resolve(ctx context.Context, addr string) (string, error) {
 	}
 
 	host, port, err := net.SplitHostPort(addr)
-	if err != nil || host == "" {
+	if err != nil {
 		return "", err
 	}
+	if host == "" {
+		return addr, nil
+	}
 
 	if r.Hosts != nil {
 		if ips, _ := r.Hosts.Lookup("ip", host); len(ips) > 0 {

pkg/metadata/metadata.go

@@ -93,6 +93,10 @@ func GetDuration(md Metadata, key string) (v time.Duration) {
 		return time.Duration(vv) * time.Second
 	case string:
 		v, _ = time.ParseDuration(vv)
+		if v == 0 {
+			n, _ := strconv.Atoi(vv)
+			v = time.Duration(n) * time.Second
+		}
 	}
 	return
 }