Use public url for returned file url result
Use public url for returned file url result

chrislusf/seaweedfs,chrislusf/seaweedfs,k85169336/seaweedfs,chrislusf/seaweedfs,k85169336/seaweedfs,hxiaodon/seaweedfs,chrislusf/seaweedfs,hxiaodon/seaweedfs