Configuring an Object ACL

Functions

OBS supports the control of access permission for objects. By default, only the object creator has the read and write permissions for the object. However, the creator can set a public access policy to assign the read permission to all other users. Even if the ACL is configured for an object encrypted in the SSE-KMS mode, the inter-tenant access is unavailable.

You can set an access control policy when uploading an object or make a call of an API operation to modify or obtain the object ACL. An object ACL supports a maximum of 100 grants.

This section explains how to modify an object ACL and change access permission on an object.

Versioning

By default, this operation modifies the ACL of the latest version of an object. To specify a specified version, the request can carry the versionId parameter.

Request Syntax

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PUT /ObjectName?acl HTTP/1.1 
Host: bucketname.obs.region.myhuaweicloud.eu
Date: date
Authorization: authorization

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

Request Parameters

Table 1 describes the request parameters.

Request Headers

This request uses common headers. For details, see Table 3.

Request Elements

The request message carries the ACL information of the object by using message elements. For the meanings of the elements, see Table 2.

Response Syntax

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HTTP/1.1 status_code
Content-Length: length
Content-Type: application/xml

Response Headers

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

In addition to the common response headers, the headers listed in Table 3 may be used.

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

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PUT /obj2?acl HTTP/1.1
User-Agent: curl/7.29.0
Host: examplebucket.obs.region.myhuaweicloud.eu
Accept: */*
Date: WED, 01 Jul 2015 04:42:34 GMT
Authorization: OBS H4IPJX0TQTHTHEBQQCEC:8xAODun1ofjkwHm8YhtN0QEcy9M=
Content-Length: 727

<AccessControlPolicy xmlns="http://obs.eu-west-101.myhuaweicloud.eu/doc/2015-06-30/">
  <Owner> 
    <ID>b4bf1b36d9ca43d984fbcb9491b6fce9</ID> 
  </Owner>  
  <Delivered>false</Delivered>
  <AccessControlList> 
    <Grant> 
      <Grantee> 
        <ID>b4bf1b36d9ca43d984fbcb9491b6fce9</ID> 
      </Grantee>  
      <Permission>FULL_CONTROL</Permission> 
    </Grant>  
    <Grant> 
      <Grantee> 
        <ID>783fc6652cf246c096ea836694f71855</ID> 
      </Grantee>  
      <Permission>READ</Permission>
    </Grant>  
    <Grant> 
      <Grantee> 
        <Canned>Everyone</Canned> 
      </Grantee>  
      <Permission>READ</Permission> 
    </Grant> 
  </AccessControlList> 
</AccessControlPolicy>

Sample Response

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HTTP/1.1 200 OK
Server: OBS
x-obs-request-id: 8DF400000163D3F0FD2A03D2D30B0542
x-obs-id-2: 32AAAUgAIAABAAAQAAEAABAAAQAAEAABCTjCqTmsA1XRpIrmrJdvcEWvZyjbztdd
Date: WED, 01 Jul 2015 04:42:34 GMT
Content-Length: 0

Sample Request: Configuring the ACL for a Specific Object Version

PUT /object01?acl&versionId=G001118A6803675AFFFFD3043F7F91D0 HTTP/1.1
Authorization: OBS H4IPJX0TQTHTHEBQQCEC:iqSPeUBl66PwXDApxjRKk6hlcN4=
User-Agent: curl/7.29.0
Host: examplebucket.obs.region.myhuaweicloud.com
Date: WED, 01 Jul 2015 02:37:22 GMT
Content-Type: application/xml
 
<AccessControlPolicy  xmlns="http://obs.region.myhuaweicloud.com/doc/2015-06-30/">
    <Owner>
        <ID>d029cb567d46458sp0x75800575ee4cf</ID>
    </Owner>
    <Delivered>false</Delivered>
    <AccessControlList>
        <Grant>
            <Grantee>
                <ID>f98sx63gg849422e8f330af1349c588f</ID>
            </Grantee>
            <Permission>FULL_CONTROL</Permission>
        </Grant>
        <Grant>
            <Grantee>
                <ID>fa558a82a84946sn98u30af195as3hi5</ID>
            </Grantee>
            <Permission>READ</Permission>
        </Grant>
        <Grant>
            <Grantee>
                <Canned>Everyone</Canned>
            </Grantee>
            <Permission>READ</Permission>
        </Grant>
    </AccessControlList>
</AccessControlPolicy>

Sample Response: Configuring the ACL for a Specific Object Version

x-obs-id-2: 32AAAQAAEAABSAAgAAEAABAAAQAAEAABCSmpL2dv6zZLM2HmUrXKTAi258MPqmrp
x-obs-request-id: 0000018A2A73AF59D3085C8F8ABF0C65
Server: OBS
Content-Length: 0
Date: WED, 01 Jul 2015 02:37:22 GMT
x-obs-version-id: G001118A6803675AFFFFD3043F7F91D0