The bucket must be as named, the ACL of the bucket must match, the key can start with anything, and on success you'll go to a particular URL.
bucket 必须被命名，bucket 的 ACL 必须匹配，密匙可以以任何内容开头，成功后您将得到一个特殊的 URL。
In this sample, we use a simple approach: Every CM user group will be added to a fixed ACL named "DW_ACL" that was created in the CM datastore before.
在这个例子中，我们使用一种简单的方法：每个CM用户组将被添加到一个名为“DW_ACL”的固定acl中，这个ACL是之前在CM数据存储中创建的。
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