Functions

This operation controls access permissions for buckets. By default, only the creator of a bucket has the permission to read and write the bucket. You can also set other access permissions. For example, you can set a public read policy to grant the read permission to all users.

You can configure an ACL when creating a bucket, and modify or obtain the ACLs of existing buckets using the API operations. A bucket ACL supports a maximum of 100 grants. The PUT method is idempotent. With this method, a new bucket ACL will overwrite the previous bucket ACL. To modify or delete an ACL, you just need to create a new one using the PUT method.

Request Syntax

PUT /?acl HTTP/1.1 
Host: bucketname.obs.region.example.com
Date: date
Authorization: authorization
Content-Type: application/xml 
Content-Length: length

<AccessControlPolicy> 
    <Owner> 
        <ID>ID</ID> 
    </Owner> 
    <AccessControlList> 
        <Grant> 
            <Grantee>
               <ID>domainId</ID>
            </Grantee> 
            <Permission>permission</Permission> 
            <Delivered>false</Delivered>
        </Grant>
    </AccessControlList> 
</AccessControlPolicy>

Request Parameters

This request contains no parameters.

Request Headers

You can change the ACL of a bucket by using the header settings. Each ACL configured with the header setting has a set of predefined grantees and authorized permissions. If you want to authorize access permissions by adding the header to a request, you must add the following header and specify the value.

**Table 1** Optional header for specifying canned ACLs
Header	Type	Mandatory (Yes/No)	Description
x-obs-acl	String	No	Explanation: Uses the canned ACL for a bucket. Restrictions: None Value range: private public-read public-read-write public-read-delivered public-read-write-delivered . Default value: private

Request Elements

This request carries ACL information in elements to specify an ACL. Table 3 describes the elements.

**Table 2** Additional request elements
Element	Type	Mandatory (Yes/No)	Description
Owner	XML	Yes	Explanation: Bucket owner information, including the ID Restrictions: None Value range: None Default value: None
ID	String	Yes	Explanation: Tenant ID of the grantee. Restrictions: None Value range: None Default value: None
Grant	XML	No	Explanation: Container for the grantee and the granted permissions Restrictions: A single bucket can contain at most 100 grants in its ACL. Value range: None Default value: None
Grantee	XML	No	Explanation: Grantee information Restrictions: None Value range: None Default value: None
Canned	String	No	Explanation: Grants permissions to all users. Restrictions: None Value range: Everyone Default value: None
Delivered	Boolean	No	Explanation: Whether the bucket ACL is applied to all objects in the bucket. Restrictions: None Value range: true: The bucket ACL is applied to all objects in the bucket. false: The bucket ACL is not applied to any objects in the bucket. Default value: false
Permission	String	Yes	Explanation: Permissions to be granted. Restrictions: None Value range: READ READ_ACP WRITE WRITE_ACP FULL_CONTROL Default value: None
AccessControlList	XML	Yes	Explanation: Indicates an ACL, which consists of three elements: Grant, Grantee, and Permission. Restrictions: None Value range: None Default value: None

Response Syntax

HTTP/1.1 status_code
Date: date
Content-Length: length

Response Headers

The response to the request uses common headers. For details, see Table 1.

Response Elements

This response contains no elements.

Error Responses

No special error responses are returned. For details about error responses, see Table 2.

Sample Request

PUT /?acl HTTP/1.1
User-Agent: curl/7.29.0
Host: examplebucket.obs.region.example.com
Accept: */*
Date: WED, 01 Jul 2015 02:37:22 GMT
Authorization: OBS H4IPJX0TQTHTHEBQQCEC:iqSPeUBl66PwXDApxjRKk6hlcN4=
Content-Length: 727

<AccessControlPolicy xmlns="http://obs.example.com/doc/2015-06-30/">  
  <Owner> 
    <ID>b4bf1b36d9ca43d984fbcb9491b6fce9</ID> 
  </Owner>  
  <AccessControlList> 
    <Grant> 
      <Grantee> 
        <ID>b4bf1b36d9ca43d984fbcb9491b6fce9</ID> 
      </Grantee>  
      <Permission>FULL_CONTROL</Permission> 
    </Grant>  
    <Grant> 
      <Grantee> 
        <ID>783fc6652cf246c096ea836694f71855</ID> 
      </Grantee>  
      <Permission>READ</Permission>  
      <Delivered>false</Delivered> 
    </Grant>  
    <Grant> 
      <Grantee> 
        <Canned>Everyone</Canned> 
      </Grantee>  
      <Permission>READ_ACP</Permission> 
    </Grant> 
  </AccessControlList> 
</AccessControlPolicy>

Sample Response

HTTP/1.1 200 OK
Server: OBS
x-obs-request-id: BF2600000164361F2954B4D063164704
x-obs-id-2: 32AAAQAAEAABSAAgAAEAABAAAQAAEAABCT78HTIBuhe0FbtSptrb/akwELtwyPKs
Date: WED, 01 Jul 2015 02:37:22 GMT
Content-Length: 0

Configuring a Bucket ACL