改进退出程序时关闭数据库写入

internal/caches/list_file_db.go

@@ -504,6 +504,10 @@ func (this *FileListDB) CleanAll() error {
 }
 
 func (this *FileListDB) Close() error {
+	if this.isClosed {
+		return nil
+	}
+
 	this.isClosed = true
 	this.isReady = false
 

internal/caches/manager.go

@@ -19,7 +19,7 @@ func init() {
 		return
 	}
 
-	events.On(events.EventQuit, func() {
+	events.OnClose(func() {
 		remotelogs.Println("CACHE", "quiting cache manager")
 		SharedManager.UpdatePolicies([]*serverconfigs.HTTPCachePolicy{})
 	})