|
public ListObjectsV2Async ( ListObjectsV2Request request, System cancellationToken = default(CancellationToken) ) : Task |
||
| request | ListObjectsV2Request | Container for the necessary parameters to execute the ListObjectsV2 operation. |
| cancellationToken | System | /// A cancellation token that can be used by other objects or threads to receive notice of cancellation. /// |
| return | Task |
|
/// <summary>
/// https://docs.aws.amazon.com/AmazonS3/latest/dev/ListingObjectKeysUsingNetSDK.html
/// </summary>
/// <returns></returns>
async Task ListObjectsAsync()
{
//List Objects in the Bucket
ListObjectsV2Request listRequest = new ListObjectsV2Request
{
BucketName = awsBucket,
MaxKeys = 3
};
/// Can also limit Searches with Prefix = searchKeyPrefix
///MaxKeys=3 for testing
ListObjectsV2Response listResponse;
do
{
LOGINFO("OnTask, ListObjectsV2Async: " + listRequest.ToString());
listResponse = await s3Client.ListObjectsV2Async(listRequest);
//Process the response
foreach (S3Object entry in listResponse.S3Objects)
{
LOGINFO("Processing Object Key=" + entry.Key + ", Size=" + entry.Size);
var fileName = archivePath + "\\" + entry.Key;
ReadObjectDataAsync(entry.Key, fileName).Wait();
//Send the local Filename to the Business Service
BusinessHost.ProcessInput(fileName);
//Now delete the Entry in S3
DeleteObjectNonVersionedBucketAsync(entry.Key).Wait();
}
} while (listResponse.IsTruncated);
}
private async Task <List <Amazon.S3.Model.S3Object> > ListObjectsAsync(string bucket, string prefix, CancellationToken ct = default)
{
var request = new Amazon.S3.Model.ListObjectsV2Request
{
BucketName = bucket,
Prefix = prefix,
};
var objects = new List <Amazon.S3.Model.S3Object>();
Amazon.S3.Model.ListObjectsV2Response response;
do
{
response = await _client.ListObjectsV2Async(request, ct);
objects.AddRange(response.S3Objects);
request.ContinuationToken = response.NextContinuationToken;
} while (response.IsTruncated);
return(objects);
}
async Task EmptyBucket(Amazon.S3.AmazonS3Client client, string BucketName)
{
int itemCount = 0;
var logger = LogManager.GetCurrentClassLogger();
do
{
var listObjectsResult = await client.ListObjectsV2Async(new ListObjectsV2Request { BucketName = BucketName });
itemCount = listObjectsResult.KeyCount;
if (itemCount > 0)
{
var deleteObjectsResult = await client.DeleteObjectsAsync(new DeleteObjectsRequest { BucketName = BucketName, Objects = listObjectsResult.S3Objects.Select(a => new KeyVersion {
Key = a.Key, VersionId = null
}).ToList() });
if (deleteObjectsResult.HttpStatusCode == System.Net.HttpStatusCode.OK)
{
logger.Debug($"Successfully deleted {deleteObjectsResult.DeletedObjects.Count} objects from bucket {BucketName}.");
}
}
} while (itemCount > 0);
}