S3 / Client / get_bucket_policy

get_bucket_policy#

S3.Client.get_bucket_policy(**kwargs)#

Returns the policy of a specified bucket. 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 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 a 403 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 a 405 Method Not Allowed error.

Warning

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, and DeleteBucketPolicy 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 Web Services Organizations policies.

To use this API operation against an access point, provide the alias of the access point in place of the bucket name.

To use this API operation against 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 about InvalidAccessPointAliasError, see List of Error Codes.

For more information about bucket policies, see Using Bucket Policies and User Policies.

The following action is related to GetBucketPolicy:

See also: AWS API Documentation

Request Syntax

response = client.get_bucket_policy(
    Bucket='string',
    ExpectedBucketOwner='string'
)
Parameters:

  • Bucket (string) –

    [REQUIRED]

    The bucket name for which to get the bucket policy.

    To use this API operation against an access point, provide the alias of the access point in place of the bucket name.

    To use this API operation against 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 about InvalidAccessPointAliasError, see List of Error Codes.

  • ExpectedBucketOwner (string) – The account ID of the expected bucket owner. If the bucket is owned by a different account, the request fails with the HTTP status code 403 Forbidden (access denied).

Return type:

dict

Returns:

Response Syntax

{
    'Policy': 'string'
}

Response Structure

  • (dict) –

    • Policy (string) –

      The bucket policy as a JSON document.

Examples

The following example returns bucket policy associated with a bucket.

response = client.get_bucket_policy(
    Bucket='examplebucket',
)

print(response)

Expected Output:

{
    'Policy': '{"Version":"2008-10-17","Id":"LogPolicy","Statement":[{"Sid":"Enables the log delivery group to publish logs to your bucket ","Effect":"Allow","Principal":{"AWS":"111122223333"},"Action":["s3:GetBucketAcl","s3:GetObjectAcl","s3:PutObject"],"Resource":["arn:aws:s3:::policytest1/*","arn:aws:s3:::policytest1"]}]}',
    'ResponseMetadata': {
        '...': '...',
    },
}