You are viewing documentation for version 2 of the AWS SDK for Ruby. Version 3 documentation can be found here.

Class: Aws::S3::BucketAcl

Resources::Resource show all
Defined in:

Instance Attribute Summary collapse

Attributes inherited from Resources::Resource

#client, #identifiers

Instance Method Summary collapse

Methods inherited from Resources::Resource

add_data_attribute, add_identifier, #data, data_attributes, #data_loaded?, identifiers, #load, #wait_until

Methods included from Resources::OperationMethods

#add_batch_operation, #add_operation, #batch_operation, #batch_operation_names, #batch_operations, #operation, #operation_names, #operations

Constructor Details

#initialize(bucket_name, options = {}) ⇒ Object #initialize(options = {}) ⇒ Object


  • #initialize(bucket_name, options = {}) ⇒ Object


    • bucket_name (String)

    Options Hash (options):

    • :client (Client)

      When `:client is not given, the options hash is used to construct a new Client object.

  • #initialize(options = {}) ⇒ Object

    Options Hash (options):

    • :bucket_name (required, String)
    • :client (Client)

      When `:client is not given, the options hash is used to construct a new Client object.

Instance Attribute Details

#bucket_nameString (readonly)


  • (String)

#grantsArray<Types::Grant> (readonly)

A list of grants.


#ownerTypes::Owner (readonly)

Container for the bucket owner\'s display name and ID.


  • (Types::Owner)

    Container for the bucket owner\'s display name and ID.

Instance Method Details



#put(options = {}) ⇒ Struct

Sets the permissions on an existing bucket using access control lists (ACL). For more information, see Using ACLs. To set the ACL of a bucket, you must have WRITE_ACP permission.

You can use one of the following two ways to set a bucket's permissions:

  • Specify the ACL in the request body

  • Specify permissions using request headers

You cannot specify access permission using both the body and the request headers.

Depending on your application needs, you may choose to set the ACL on a bucket using either the request body or the headers. For example, if you have an existing application that updates a bucket ACL using the request body, then you can continue to use that approach.

Access Permissions

You can set access permissions using one of the following methods:

  • Specify a canned ACL with the x-amz-acl request header. Amazon S3 supports a set of predefined ACLs, known as canned ACLs. Each canned ACL has a predefined set of grantees and permissions. Specify the canned ACL name as the value of x-amz-acl. If you use this header, you cannot use other access control-specific headers in your request. For more information, see Canned ACL.

  • Specify access permissions explicitly with the x-amz-grant-read, x-amz-grant-read-acp, x-amz-grant-write-acp, and x-amz-grant-full-control headers. When using these headers, you specify explicit access permissions and grantees (AWS accounts or Amazon S3 groups) who will receive the permission. If you use these ACL-specific headers, you cannot use the x-amz-acl header to set a canned ACL. These parameters map to the set of permissions that Amazon S3 supports in an ACL. For more information, see Access Control List (ACL) Overview.

    You specify each grantee as a type=value pair, where the type is one of the following:

    • id – if the value specified is the canonical user ID of an AWS account

    • uri – if you are granting permissions to a predefined group

    • emailAddress – if the value specified is the email address of an AWS account

      Using email addresses to specify a grantee is only supported in the following AWS Regions:

      • US East (N. Virginia)

      • US West (N. California)

      • US West (Oregon)

      • Asia Pacific (Singapore)

      • Asia Pacific (Sydney)

      • Asia Pacific (Tokyo)

      • Europe (Ireland)

      • South America (São Paulo)

      For a list of all the Amazon S3 supported Regions and endpoints, see Regions and Endpoints in the AWS General Reference.

    For example, the following x-amz-grant-write header grants create, overwrite, and delete objects permission to LogDelivery group predefined by Amazon S3 and two AWS accounts identified by their email addresses.

    x-amz-grant-write: uri="", id="111122223333", id="555566667777"

You can use either a canned ACL or specify access permissions explicitly. You cannot do both.

Grantee Values

You can specify the person (grantee) to whom you're assigning access rights (using request elements) in the following ways:

Related Resources


Request syntax example with placeholder values

  acl: "private", # accepts private, public-read, public-read-write, authenticated-read
  access_control_policy: {
    grants: [
        grantee: {
          display_name: "DisplayName",
          email_address: "EmailAddress",
          id: "ID",
          type: "CanonicalUser", # required, accepts CanonicalUser, AmazonCustomerByEmail, Group
          uri: "URI",
        permission: "FULL_CONTROL", # accepts FULL_CONTROL, WRITE, WRITE_ACP, READ, READ_ACP
    owner: {
      display_name: "DisplayName",
      id: "ID",
  content_md5: "ContentMD5",
  grant_full_control: "GrantFullControl",
  grant_read: "GrantRead",
  grant_read_acp: "GrantReadACP",
  grant_write: "GrantWrite",
  grant_write_acp: "GrantWriteACP",
  expected_bucket_owner: "AccountId",
  use_accelerate_endpoint: false,

Options Hash (options):

  • :acl (String)

    The canned ACL to apply to the bucket.

  • :access_control_policy (Types::AccessControlPolicy)

    Contains the elements that set the ACL permissions for an object per grantee.

  • :content_md5 (String)

    The base64-encoded 128-bit MD5 digest of the data. This header must be used as a message integrity check to verify that the request body was not corrupted in transit. For more information, go to RFC 1864.

    For requests made using the AWS Command Line Interface (CLI) or AWS SDKs, this field is calculated automatically.

  • :grant_full_control (String)

    Allows grantee the read, write, read ACP, and write ACP permissions on the bucket.

  • :grant_read (String)

    Allows grantee to list the objects in the bucket.

  • :grant_read_acp (String)

    Allows grantee to read the bucket ACL.

  • :grant_write (String)

    Allows grantee to create, overwrite, and delete any object in the bucket.

  • :grant_write_acp (String)

    Allows grantee to write the ACL for the applicable bucket.

  • :expected_bucket_owner (String)

    The account id of the expected bucket owner. If the bucket is owned by a different account, the request will fail with an HTTP 403 (Access Denied) error.

  • :use_accelerate_endpoint (Boolean)

    When true, the "" endpoint will be used.


  • (Struct)

    Returns an empty response.

See Also: