À utiliser GetObjectRetention avec un AWS SDK ou CLI

    /// <summary>
    /// Get the retention period for an S3 object.
    /// </summary>
    /// <param name="bucketName">The bucket of the object.</param>
    /// <param name="objectKey">The object key.</param>
    /// <returns>The object retention details.</returns>
    public async Task<ObjectLockRetention> GetObjectRetention(string bucketName,
        string objectKey)
    {
        try
        {
            var request = new GetObjectRetentionRequest()
            {
                BucketName = bucketName,
                Key = objectKey
            };

            var response = await _amazonS3.GetObjectRetentionAsync(request);
            Console.WriteLine($"\tObject retention for {objectKey} in {bucketName}: " +
                              $"\n\t{response.Retention.Mode} until {response.Retention.RetainUntilDate:d}.");
            return response.Retention;
        }
        catch (AmazonS3Exception ex)
        {
            Console.WriteLine($"\tUnable to fetch object lock retention: '{ex.Message}'");
            return new ObjectLockRetention();
        }
    }

Pour récupérer la configuration de rétention d'un objet

L'get-object-retentionexemple suivant récupère la configuration de rétention d'objets pour l'objet spécifié.

aws s3api get-object-retention \
    --bucket my-bucket-with-object-lock \
    --key doc1.rtf

Sortie :

{
    "Retention": {
        "Mode": "GOVERNANCE",
        "RetainUntilDate": "2025-01-01T00:00:00.000Z"
    }
}

// S3Actions wraps S3 service actions.
type S3Actions struct {
	S3Client  *s3.Client
	S3Manager *manager.Uploader
}



// GetObjectRetention retrieves the object retention configuration for an S3 object.
func (actor S3Actions) GetObjectRetention(ctx context.Context, bucket string, key string) (*types.ObjectLockRetention, error) {
	var retention *types.ObjectLockRetention
	input := &s3.GetObjectRetentionInput{
		Bucket: aws.String(bucket),
		Key:    aws.String(key),
	}

	output, err := actor.S3Client.GetObjectRetention(ctx, input)
	if err != nil {
		var noKey *types.NoSuchKey
		var apiErr *smithy.GenericAPIError
		if errors.As(err, &noKey) {
			log.Printf("Object %s does not exist in bucket %s.\n", key, bucket)
			err = noKey
		} else if errors.As(err, &apiErr) {
			switch apiErr.ErrorCode() {
			case "NoSuchObjectLockConfiguration":
				err = nil
			case "InvalidRequest":
				log.Printf("Bucket %s does not have locking enabled.", bucket)
				err = nil
			}
		}
	} else {
		retention = output.Retention
	}

	return retention, err
}

    // Get the retention period for an S3 object.
    public ObjectLockRetention getObjectRetention(String bucketName, String key){
        try {
            GetObjectRetentionRequest retentionRequest = GetObjectRetentionRequest.builder()
                .bucket(bucketName)
                .key(key)
                .build();

            GetObjectRetentionResponse response = getClient().getObjectRetention(retentionRequest);
            System.out.println("tObject retention for "+key +" in "+ bucketName +": " + response.retention().mode() +" until "+ response.retention().retainUntilDate() +".");
            return response.retention();

        } catch (S3Exception e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            return null;
        }
    }

import { fileURLToPath } from "url";
import { GetObjectRetentionCommand, S3Client } from "@aws-sdk/client-s3";

/**
 * @param {S3Client} client
 * @param {string} bucketName
 * @param {string} objectKey
 */
export const main = async (client, bucketName, objectKey) => {
  const command = new GetObjectRetentionCommand({
    Bucket: bucketName,
    Key: objectKey,
    // Optionally, you can provide additional parameters
    // ExpectedBucketOwner: "ACCOUNT_ID",
    // RequestPayer: "requester",
    // VersionId: "OBJECT_VERSION_ID",
  });

  try {
    const { Retention } = await client.send(command);
    console.log(`Object Retention Settings: ${Retention.Status}`);
  } catch (err) {
    console.error(err);
  }
};

// Invoke main function if this file was run directly.
if (process.argv[1] === fileURLToPath(import.meta.url)) {
  main(new S3Client(), "BUCKET_NAME", "OBJECT_KEY");
}

Exemple 1 : La commande renvoie le mode et la date jusqu'à ce que l'objet soit conservé.

Get-S3ObjectRetention -BucketName 's3buckettesting' -Key 'testfile.txt'