You can call this operation to modify the access control list (ACL) of an object. Only the bucket owner that has permissions to read and write objects in the bucket can call this operation to modify object ACLs.
By default, the PutObjectACL operation is called to configure the ACL of the current version of an object. You can specify a version ID in the request to configure the ACL of the specified version of an object. If the specified version is a delete marker, OSS returns 404 Not Found.
When you call the PutObjectACL operation, you can set the
x-oss-object-acl header in request to configure the ACL of an object. The following table describes the ACLs that you can configure for an object.
|private||The object is a private resource. Only the owner of this object has permissions to read and write this object. Other users cannot access the object.|
|public-read||The object is a public-read resource. Only the owner of this object has permissions to write this object. Other users can only read the object.|
|public-read-write||The object is a public-read-write resource. All users have permissions to read and write this object.|
|default||The ACL of the object is the same as that of the bucket in which the object is stored.|
- The ACL of an object takes precedence over the ACL of the bucket in which the object is stored. For example, if an object whose ACL is public-read-write is stored in a bucket whose ACL is private, all users can read and write the object. By default, if you do not configure the ACL of an object, the ACL of the object is the same as that of the bucket in which the object is stored.
- Operations that read objects include GetObject, HeadObject, CopyObject, and UploadPartCopy, in which CopyObject and UploadPartCopy read the source object. Operations that write objects include PutObject, PostObject, AppendObject, DeleteObject, DeleteMultipleObjects, CompleteMultipartUpload, and CopyObject, in which CopyObject writes the destination object.
- When you call operations to write an object, you can also include the x-oss-object-acl header in the request to configure the ACL of the object. For example, you can include the x-oss-object-acl header in a PutObject request to configure the ACL of the object to upload.
PUT /ObjectName?acl HTTP/1.1 x-oss-object-acl: Permission Host: BucketName.oss-cn-hangzhou.aliyuncs.com Date: GMT Date Authorization: SignatureValue
|x-oss-object-acl||String||No||public-read||The ACL of the object when the object is created. Default value: default.
For more information about ACLs, see ACL.
For more information about the common headers included in PutObjectACL requests such as Host and Date, see Common request headers.
- Modify the ACL of an object in an unversioned bucket
PUT /test-object?acl HTTP/1.1 x-oss-object-acl: public-read Host: oss-example.oss-cn-hangzhou.aliyuncs.com Date: Wed, 29 Apr 2015 05:21:12 GMT Authorization: OSS qn6qrrqxo2oawuk53otfjbyc:KU5h8YMUC78M30dXqf3JxrTZ****Sample responses
HTTP/1.1 200 OK x-oss-request-id: 559CC9BDC755F95A64485981 Date: Wed, 29 Apr 2015 05:21:12 GMT Content-Length: 0 Connection: keep-alive Server: AliyunOSS
- Modify the ACL of an object in a versioned bucket
PUT /example?acl&versionId=CAEQMhiBgIC3rpSD0BYiIDBjYTk5MmIzN2JlNjQxZTFiNGIzM2E3OTliODA0**** HTTP/1.1 x-oss-object-acl: public-read Host: oss-example.oss-cn-hangzhou.aliyuncs.com Date: Tue, 09 Apr 2019 06:30:11 GMT Authorization: OSS qctg2ns3l8u51iu:UTsv3F7L34v+ECq52vURdCSv****Sample responses
HTTP/1.1 200 OK x-oss-version-id: CAEQMhiBgIC3rpSD0BYiIDBjYTk5MmIzN2JlNjQxZTFiNGIzM2E3OTliODA0**** x-oss-request-id: 5CAC3BF3B7AEADE017000624 Date: Tue, 09 Apr 2019 06:30:11 GMT Content-Length: 0 Connection: keep-alive Server: AliyunOSS
You can use OSS SDKs for the following programming languages to call the PutObjectACL operation:
|Error code||HTTP status code||Description|
|AccessDenied||403||The error message returned because you are not the bucket owner or do not have permissions to read and write the object whose ACL you want to modify.|
|InvalidArgument||400||The error message returned because the specified x-oss-object-acl value is invalid.|
|FileAlreadyExists||409||The error message returned because the object whose ACL you want to modify is a directory in a bucket for which the hierarchical namespace feature is enabled.|