public ListVersionsResponse MssListFileVersions(string sObjectKey)
{
AmazonS3 client = AWSClientFactory.CreateAmazonS3Client(S3ACCESSKEY, S3SECRETKEY);
string BUCKET_NAME = ConfigurationManager.AppSettings["AWSBUCKET"];
return(client.ListVersions(new ListVersionsRequest().WithBucketName(BUCKET_NAME).WithKeyMarker(sObjectKey)));
}
/// <summary>
/// Deletes an S3 bucket which contains objects.
/// An S3 bucket which contains objects cannot be deleted until all the objects
/// in it are deleted. The function deletes all the objects in the specified
/// bucket and then deletes the bucket itself.
/// </summary>
/// <param name="bucketName">The bucket to be deleted.</param>
/// <param name="s3Client">The Amazon S3 Client to use for S3 specific operations.</param>
/// <param name="deleteOptions">Options to control the behavior of the delete operation.</param>
/// <param name="updateCallback">The callback which is used to send updates about the delete operation.</param>
/// <param name="asyncCancelableResult">An IAsyncCancelableResult that can be used to poll or wait for results, or both;
/// this value is also needed when invoking EndDeleteS3BucketWithObjects. IAsyncCancelableResult can also
/// be used to cancel the operation while it's in progress.</param>
private static void DeleteS3BucketWithObjectsInternal(string bucketName, AmazonS3 s3Client,
S3DeleteBucketWithObjectsOptions deleteOptions,Action<S3DeleteBucketWithObjectsUpdate> updateCallback,
AsyncCancelableResult asyncCancelableResult)
{
// Validations.
if (s3Client == null)
{
throw new ArgumentNullException("s3Client", "The s3Client cannot be null!");
}
if (string.IsNullOrEmpty(bucketName))
{
throw new ArgumentNullException("bucketName", "The bucketName cannot be null or empty string!");
}
var listVersionsRequest = new ListVersionsRequest { BucketName=bucketName };
ListVersionsResponse listVersionsResponse;
// Iterate through the objects in the bucket and delete them.
do
{
// Check if the operation has been canceled.
if (asyncCancelableResult.IsCancelRequested)
{
// Signal that the operation is canceled.
asyncCancelableResult.SignalWaitHandleOnCanceled();
return;
}
// List all the versions of all the objects in the bucket.
listVersionsResponse = s3Client.ListVersions(listVersionsRequest);
if (listVersionsResponse.Versions.Count==0)
{
// If the bucket has no objects break the loop.
break;
}
var keyVersionList = new List<KeyVersion>(listVersionsResponse.Versions.Count);
for (int index = 0; index < listVersionsResponse.Versions.Count; index++)
{
keyVersionList.Add(new KeyVersion(
listVersionsResponse.Versions[index].Key,
listVersionsResponse.Versions[index].VersionId
));
}
try
{
// Delete the current set of objects.
var deleteObjectsResponse =
s3Client.DeleteObjects(new DeleteObjectsRequest
{
BucketName=bucketName,
Quiet=deleteOptions.QuietMode,
Keys=keyVersionList
});
if (!deleteOptions.QuietMode)
{
// If quiet mode is not set, update the client with list of deleted objects.
InvokeS3DeleteBucketWithObjectsUpdateCallback(
updateCallback,
new S3DeleteBucketWithObjectsUpdate
{
DeletedObjects = deleteObjectsResponse.DeletedObjects
}
);
}
}
catch (DeleteObjectsException deleteObjectsException)
{
if (deleteOptions.ContinueOnError)
{
// Continue the delete operation if an error was encountered.
// Update the client with the list of objects that were deleted and the
// list of objects on which the delete failed.
InvokeS3DeleteBucketWithObjectsUpdateCallback(
updateCallback,
new S3DeleteBucketWithObjectsUpdate
{
DeletedObjects = deleteObjectsException.ErrorResponse.DeletedObjects,
DeleteErrors = deleteObjectsException.ErrorResponse.DeleteErrors
}
);
}
else
{
// Re-throw the exception if an error was encountered.
throw;
}
}
// Set the markers to get next set of objects from the bucket.
listVersionsRequest.KeyMarker = listVersionsResponse.NextKeyMarker;
listVersionsRequest.VersionIdMarker = listVersionsResponse.NextVersionIdMarker;
}
// Continue listing objects and deleting them until the bucket is empty.
while (listVersionsResponse.IsTruncated);
for (int attempts = 0; true; attempts++)
{
try
{
// Bucket is empty, delete the bucket.
s3Client.DeleteBucket( new DeleteBucketRequest { BucketName = bucketName } );
break;
}
catch (AmazonS3Exception e)
{
if (!string.Equals(e.ErrorCode, S3Constants.BucketNotEmpty) || attempts >= 3)
throw;
Thread.Sleep(5 * 1000);
}
}
// Signal that the operation is completed.
asyncCancelableResult.SignalWaitHandleOnCompleted();
}
