Get the ACL of an Amazon S3 bucket using an AWS SDK - Amazon Simple Storage Service

Get the ACL of an Amazon S3 bucket using an AWS SDK

The following code examples show how to get the access control list (ACL) of an S3 bucket.

.NET
AWS SDK for .NET
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the AWS Code Examples Repository. 


        /// <summary>
        /// Get the access control list (ACL) for the new bucket.
        /// </summary>
        /// <param name="client">The initialized client object used to get the
        /// access control list (ACL) of the bucket.</param>
        /// <param name="newBucketName">The name of the newly created bucket.</param>
        /// <returns>An S3AccessControlList.</returns>
        public static async Task<S3AccessControlList> GetACLForBucketAsync(IAmazonS3 client, string newBucketName)
        {
            // Retrieve bucket ACL to show that the ACL was properly applied to
            // the new bucket.
            GetACLResponse getACLResponse = await client.GetACLAsync(new GetACLRequest
            {
                BucketName = newBucketName,
            });

            return getACLResponse.AccessControlList;
        }

  • For API details, see GetBucketAcl in AWS SDK for .NET API Reference.

C++
SDK for C++
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the AWS Code Examples Repository. 

bool AwsDoc::S3::GetBucketAcl(const Aws::String &bucketName,
                              const Aws::Client::ClientConfiguration &clientConfig) {
    Aws::S3::S3Client s3_client(clientConfig);

    Aws::S3::Model::GetBucketAclRequest request;
    request.SetBucket(bucketName);

    Aws::S3::Model::GetBucketAclOutcome outcome =
            s3_client.GetBucketAcl(request);

    if (!outcome.IsSuccess()) {
        const Aws::S3::S3Error &err = outcome.GetError();
        std::cerr << "Error: GetBucketAcl: "
                  << err.GetExceptionName() << ": " << err.GetMessage() << std::endl;
    }
    else {
        Aws::Vector<Aws::S3::Model::Grant> grants =
                outcome.GetResult().GetGrants();

        for (auto it = grants.begin(); it != grants.end(); it++) {
            Aws::S3::Model::Grant grant = *it;
            Aws::S3::Model::Grantee grantee = grant.GetGrantee();

            std::cout << "For bucket " << bucketName << ": "
                      << std::endl << std::endl;

            if (grantee.TypeHasBeenSet()) {
                std::cout << "Type:          "
                          << GetGranteeTypeString(grantee.GetType()) << std::endl;
            }

            if (grantee.DisplayNameHasBeenSet()) {
                std::cout << "Display name:  "
                          << grantee.GetDisplayName() << std::endl;
            }

            if (grantee.EmailAddressHasBeenSet()) {
                std::cout << "Email address: "
                          << grantee.GetEmailAddress() << std::endl;
            }

            if (grantee.IDHasBeenSet()) {
                std::cout << "ID:            "
                          << grantee.GetID() << std::endl;
            }

            if (grantee.URIHasBeenSet()) {
                std::cout << "URI:           "
                          << grantee.GetURI() << std::endl;
            }

            std::cout << "Permission:    " <<
                      GetPermissionString(grant.GetPermission()) <<
                      std::endl << std::endl;
        }
    }

    return outcome.IsSuccess();
}

//! Routine which converts a built-in type enumeration to a human-readable string.
/*!
 \sa GetGranteeTypeString()
 \param type Type enumeration.
*/

Aws::String GetGranteeTypeString(const Aws::S3::Model::Type &type) {
    switch (type) {
        case Aws::S3::Model::Type::AmazonCustomerByEmail:
            return "Email address of an AWS account";
        case Aws::S3::Model::Type::CanonicalUser:
            return "Canonical user ID of an AWS account";
        case Aws::S3::Model::Type::Group:
            return "Predefined Amazon S3 group";
        case Aws::S3::Model::Type::NOT_SET:
            return "Not set";
        default:
            return "Type unknown";
    }
}

//! Routine which converts a built-in type enumeration to a human-readable string.
/*!
 \sa GetPermissionString()
 \param permission Permission enumeration.
*/

Aws::String GetPermissionString(const Aws::S3::Model::Permission &permission) {
    switch (permission) {
        case Aws::S3::Model::Permission::FULL_CONTROL:
            return "Can list objects in this bucket, create/overwrite/delete "
                   "objects in this bucket, and read/write this "
                   "bucket's permissions";
        case Aws::S3::Model::Permission::NOT_SET:
            return "Permission not set";
        case Aws::S3::Model::Permission::READ:
            return "Can list objects in this bucket";
        case Aws::S3::Model::Permission::READ_ACP:
            return "Can read this bucket's permissions";
        case Aws::S3::Model::Permission::WRITE:
            return "Can create, overwrite, and delete objects in this bucket";
        case Aws::S3::Model::Permission::WRITE_ACP:
            return "Can write this bucket's permissions";
        default:
            return "Permission unknown";
    }

    return "Permission unknown";
}

  • For API details, see GetBucketAcl in AWS SDK for C++ API Reference.

Java
SDK for Java 2.x
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the AWS Code Examples Repository. 

    public static String getBucketACL(S3Client s3, String objectKey,String bucketName) {

        try {
            GetObjectAclRequest aclReq = GetObjectAclRequest.builder()
                .bucket(bucketName)
                .key(objectKey)
                .build();

            GetObjectAclResponse aclRes = s3.getObjectAcl(aclReq);
            List<Grant> grants = aclRes.grants();
            String grantee = "";
            for (Grant grant : grants) {
                System.out.format("  %s: %s\n", grant.grantee().id(), grant.permission());
                grantee = grant.grantee().id();
            }
            
            return grantee;
        } catch (S3Exception e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
        
        return "";
    }

  • For API details, see GetBucketAcl in AWS SDK for Java 2.x API Reference.

JavaScript
SDK for JavaScript (v3)
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the AWS Code Examples Repository.

Get the ACL permissions.

import { GetBucketAclCommand, S3Client } from "@aws-sdk/client-s3";

const client = new S3Client({});

export const main = async () => {
  const command = new GetBucketAclCommand({
    Bucket: "test-bucket",
  });

  try {
    const response = await client.send(command);
    console.log(response);
  } catch (err) {
    console.error(err);
  }
};
Python
SDK for Python (Boto3)
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the AWS Code Examples Repository. 

class BucketWrapper:
    """Encapsulates S3 bucket actions."""
    def __init__(self, bucket):
        """
        :param bucket: A Boto3 Bucket resource. This is a high-level resource in Boto3
                       that wraps bucket actions in a class-like structure.
        """
        self.bucket = bucket
        self.name = bucket.name

    def get_acl(self):
        """
        Get the ACL of the bucket.

        :return: The ACL of the bucket.
        """
        try:
            acl = self.bucket.Acl()
            logger.info(
                "Got ACL for bucket %s. Owner is %s.", self.bucket.name, acl.owner)
        except ClientError:
            logger.exception("Couldn't get ACL for bucket %s.", self.bucket.name)
            raise
        else:
            return acl

  • For API details, see GetBucketAcl in AWS SDK for Python (Boto3) API Reference.

For a complete list of AWS SDK developer guides and code examples, see Using this service with an AWS SDK. This topic also includes information about getting started and details about previous SDK versions.