前提: 快速搭建移动应用直传服务:https://help.aliyun.com/zh/oss/use-cases/set-up-direct-data-transfer-for-mobile-apps#9354e07004mro 客户端post图片后返回: <Error> <Code>AccessDenied</Code> <Message>Access denied by authorizer's policy.</Message> <RequestId>xxxxx</RequestId> <Hos