Disable cache for action responses

engine/actions/actions.go

@@ -37,6 +37,7 @@ func (e *Action) Call() bool {
 		if action != "" {
 			fn, ok := e.list[action]
 			if ok {
+				(*e.W).Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
 				(*e.W).Header().Set("Content-Type", "text/html; charset=utf-8")
 				fn(e)
 				return true