This topic describes how to manage the access control list (ACL) of an object.
The following table describes the ACLs that you can configure for an object.
|Inherited from the bucket||The ACL of the object is the same as the ACL of the bucket in which the object is stored.||default|
|Private||Only the object owner and authorized users are granted the read and write permissions on the object.||private|
|Public read||Only the object owner and authorized users are granted the read and write permissions on the object. Other users are granted only the read permissions on the object. Exercise caution when you set the ACL of the object to this value.||public-read|
|Public read/write||All users are granted the read and write permissions on the object. Exercise caution when you set the ACL of the object to this value.||public-read-write|
By default, the ACL of an object is default when the object is created. You can use
bucket.set_object_aclto modify the ACL of the object.
require 'aliyun/oss' client = Aliyun::OSS::Client.new( # Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. endpoint: 'https://oss-cn-hangzhou.aliyuncs.com', # The AccessKey pair of an Alibaba Cloud account has permissions on all API operations. Using these credentials to perform operations in OSS is a high-risk operation. We recommend that you use a RAM user to call API operations or perform routine O&M. To create a RAM user, log on to the RAM console. access_key_id: 'AccessKeyId', access_key_secret: 'AccessKeySecret') # Specify the bucket name. Example: examplebucket. bucket = client.get_bucket('examplebucket') # Replace my-object with the full path of the object. The full path cannot contain the bucket name. acl = bucket.get_object_acl('my-object') puts acl # default bucket.set_object_acl('my-object', Aliyun::OSS::ACL::PUBLIC_READ) acl = bucket.get_object_acl('my-object') puts acl # public-read
- If you do not set the object ACL, the object inherits the ACL of the bucket in which the object is stored.
- If the ACL of an object is not set to default, the object ACL takes precedence over the ACL of the bucket in which the object is stored.
- If the ACL of an object is set to public-read or public-read-write, you can directly
access the object in a browser by using the object URL such as
- You can create an anonymous client to access an object whose ACL is set to public-read
require 'aliyun/oss' # If you do not specify access_key_id and access_key_secret, an anonymous client is created. The client can only access objects whose ACL is public-read or public-read-write. client = Aliyun::OSS::Client.new(endpoint: 'endpoint') bucket.get_object('my-object', :file => 'local_file')