GetBucketPolicy
Returns the policy of a specified bucket.
Note
Directory buckets - For directory buckets, you must make requests for this API operation to the Regional endpoint. These endpoints support path-style requests in the format https://s3express-control.region_code.amazonaws.com/bucket-name
. Virtual-hosted-style requests aren't supported.
For more information, see Regional and Zonal endpoints in the
Amazon S3 User Guide.
- Permissions
-
If you are using an identity other than the root user of the Amazon Web Services account that owns the bucket, the calling identity must both have the
GetBucketPolicy
permissions on the specified bucket and belong to the bucket owner's account in order to use this operation.If you don't have
GetBucketPolicy
permissions, Amazon S3 returns a403 Access Denied
error. If you have the correct permissions, but you're not using an identity that belongs to the bucket owner's account, Amazon S3 returns a405 Method Not Allowed
error.Important
To ensure that bucket owners don't inadvertently lock themselves out of their own buckets, the root principal in a bucket owner's Amazon Web Services account can perform the
GetBucketPolicy
,PutBucketPolicy
, andDeleteBucketPolicy
API actions, even if their bucket policy explicitly denies the root principal's access. Bucket owner root principals can only be blocked from performing these API actions by VPC endpoint policies and Amazon Organizations policies.-
General purpose bucket permissions - The
s3:GetBucketPolicy
permission is required in a policy. For more information about general purpose buckets bucket policies, see Using Bucket Policies and User Policies in the Amazon S3 User Guide. -
Directory bucket permissions - To grant access to this API operation, you must have the
s3express:GetBucketPolicy
permission in an IAM identity-based policy instead of a bucket policy. Cross-account access to this API operation isn't supported. This operation can only be performed by the Amazon account that owns the resource. For more information about directory bucket policies and permissions, see Amazon Identity and Access Management (IAM) for S3 Express One Zone in the Amazon S3 User Guide.
-
- Example bucket policies
-
General purpose buckets example bucket policies - See Bucket policy examples in the Amazon S3 User Guide.
Directory bucket example bucket policies - See Example bucket policies for S3 Express One Zone in the Amazon S3 User Guide.
- HTTP Host header syntax
-
Directory buckets - The HTTP Host header syntax is
s3express-control.region.amazonaws.com
.
The following action is related to GetBucketPolicy
:
Request Syntax
GET /?policy HTTP/1.1
Host: Bucket
.s3.amazonaws.com
x-amz-expected-bucket-owner: ExpectedBucketOwner
URI Request Parameters
The request uses the following URI parameters.
- Bucket
-
The bucket name to get the bucket policy for.
Directory buckets - When you use this operation with a directory bucket, you must use path-style requests in the format
https://s3express-control.region_code.amazonaws.com/bucket-name
. Virtual-hosted-style requests aren't supported. Directory bucket names must be unique in the chosen Availability Zone. Bucket names must also follow the formatbucket_base_name--az_id--x-s3
(for example,DOC-EXAMPLE-BUCKET--usw2-az1--x-s3
). For information about bucket naming restrictions, see Directory bucket naming rules in the Amazon S3 User GuideAccess points - When you use this API operation with an access point, provide the alias of the access point in place of the bucket name.
Object Lambda access points - When you use this API operation with an Object Lambda access point, provide the alias of the Object Lambda access point in place of the bucket name. If the Object Lambda access point alias in a request is not valid, the error code
InvalidAccessPointAliasError
is returned. For more information aboutInvalidAccessPointAliasError
, see List of Error Codes.Note
Access points and Object Lambda access points are not supported by directory buckets.
Required: Yes
- x-amz-expected-bucket-owner
-
The account ID of the expected bucket owner. If the account ID that you provide does not match the actual owner of the bucket, the request fails with the HTTP status code
403 Forbidden
(access denied).Note
For directory buckets, this header is not supported in this API operation. If you specify this header, the request fails with the HTTP status code
501 Not Implemented
.
Request Body
The request does not have a request body.
Response Syntax
HTTP/1.1 200
{ Policy
in JSON format }
Response Elements
If the action is successful, the service sends back an HTTP 200 response.
The following data is returned in JSON format by the service.
Examples
Sample Request for general purpose buckets
The following request returns the policy of the specified bucket.
GET ?policy HTTP/1.1 Host: bucket.s3.<Region>.amazonaws.com Date: Wed, 28 Oct 2009 22:32:00 GMT Authorization: authorization string
Sample Response for general purpose buckets
This example illustrates one usage of GetBucketPolicy.
HTTP/1.1 200 OK x-amz-id-2: Uuag1LuByru9pO4SAMPLEAtRPfTaOFg== x-amz-request-id: 656c76696e67SAMPLE57374 Date: Tue, 04 Apr 2010 20:34:56 GMT Connection: keep-alive Server: AmazonS3 { "Version":"2008-10-17", "Id":"aaaa-bbbb-cccc-dddd", "Statement" : [ { "Effect":"Deny", "Sid":"1", "Principal" : { "AWS":["111122223333","444455556666"] }, "Action":["s3:*"], "Resource":"arn:aws:s3:::bucket/*" } ] }
See Also
For more information about using this API in one of the language-specific Amazon SDKs, see the following: