prevent panic if you use API in a wrong way

Upstream-commit: 49d7b87cfc4385470a5ecf181f92c13b8391c002 Component: engine
2013-11-07 18:54:00 -08:00
parent 2f4c3fdf6d
commit b89c66d724
1 changed files with 5 additions and 1 deletions
--- a/components/engine/container.go
+++ b/components/engine/container.go
@ -133,7 +133,11 @@ type PortBinding struct {
 type Port string

 func (p Port) Proto() string {
-	return strings.Split(string(p), "/")[1]
+	parts := strings.Split(string(p), "/")
+	if len(parts) == 1 {
+		return "tcp"
+	}
+	return parts[1]
 }

 func (p Port) Port() string {