使用STS临时授权OSS进行上传、下载等操作时，涉及到如下报错的排查方法。
ErrorCode: AccessDenied
ErrorMessage: Access denied by authorizer’s policy.

解决方案请参考：STS临时授权OSS操作权限报“Access denied by authorizer’s policy”错

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OSS中有Access denied by authorizer‘s policy