getObjectTagging method

Future<GetObjectTaggingOutput> getObjectTagging({ required String bucket, required String key, String? expectedBucketOwner, String? versionId, })

Returns the tag-set of an object. You send the GET request against the tagging subresource associated with the object.

To use this operation, you must have permission to perform the s3:GetObjectTagging action. By default, the GET operation returns information about current version of an object. For a versioned bucket, you can have multiple versions of an object in your bucket. To retrieve tags of any other version, use the versionId query parameter. You also need permission for the s3:GetObjectVersionTagging action.

By default, the bucket owner has this permission and can grant this permission to others.

For information about the Amazon S3 object tagging feature, see Object Tagging.

The following operation is related to GetObjectTagging:

• PutObjectTagging

Parameter bucket : The bucket name containing the object for which to get the tagging information.

When using this API with an access point, you must direct requests to the access point hostname. The access point hostname takes the form AccessPointName-AccountId.s3-accesspoint.Region.amazonaws.com. When using this operation with an access point through the AWS SDKs, you provide the access point ARN in place of the bucket name. For more information about access point ARNs, see Using Access Points in the Amazon Simple Storage Service Developer Guide.

When using this API with Amazon S3 on Outposts, you must direct requests to the S3 on Outposts hostname. The S3 on Outposts hostname takes the form AccessPointName-AccountId.outpostID.s3-outposts.Region.amazonaws.com. When using this operation using S3 on Outposts through the AWS SDKs, you provide the Outposts bucket ARN in place of the bucket name. For more information about S3 on Outposts ARNs, see Using S3 on Outposts in the Amazon Simple Storage Service Developer Guide.

Parameter key : Object key for which to get the tagging information.

Parameter expectedBucketOwner : 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.

Parameter versionId : The versionId of the object for which to get the tagging information.

Implementation

Future<GetObjectTaggingOutput> getObjectTagging({
  required String bucket,
  required String key,
  String? expectedBucketOwner,
  String? versionId,
}) async {
  ArgumentError.checkNotNull(bucket, 'bucket');
  ArgumentError.checkNotNull(key, 'key');
  _s.validateStringLength(
    'key',
    key,
    1,
    1152921504606846976,
    isRequired: true,
  );
  final headers = <String, String>{
    if (expectedBucketOwner != null)
      'x-amz-expected-bucket-owner': expectedBucketOwner.toString(),
  };
  final $query = <String, List<String>>{
    if (versionId != null) 'versionId': [versionId],
  };
  final $result = await _protocol.sendRaw(
    method: 'GET',
    requestUri:
        '/${Uri.encodeComponent(bucket)}/${key.split('/').map(Uri.encodeComponent).join('/')}?tagging',
    queryParams: $query,
    headers: headers,
    exceptionFnMap: _exceptionFns,
  );
  final $elem = await _s.xmlFromResponse($result);
  return GetObjectTaggingOutput(
    tagSet: _s
        .extractXmlChild($elem, 'TagSet')!
        .findElements('Tag')
        .map((c) => Tag.fromXml(c))
        .toList(),
    versionId:
        _s.extractHeaderStringValue($result.headers, 'x-amz-version-id'),
  );
}