public bool FileExists(string folderName, string fileName)
{
//folder ignored - packages stored on top level of S3 bucket
if (String.IsNullOrWhiteSpace(folderName))
{
throw new ArgumentNullException("folderName");
}
if (String.IsNullOrWhiteSpace(fileName))
{
throw new ArgumentNullException("fileName");
}
var request = new ListObjectsRequest();
request.WithBucketName(clientContext.BucketName);
request.WithPrefix(fileName);
using (AmazonS3 client = clientContext.CreateInstance())
{
ListObjectsResponse response = WrapRequestInErrorHandler(() => client.ListObjects(request));
var count = response.S3Objects.Count;
if (count == 1)
{
return(true);
}
}
return(false);
}
public bool file_exists(string folderName, string fileName)
{
// It's allowed to have an empty folder name.
// if (String.IsNullOrWhiteSpace(folderName)) throw new ArgumentNullException("folderName");
if (String.IsNullOrWhiteSpace(fileName))
{
throw new ArgumentNullException("fileName");
}
folderName = (string.IsNullOrEmpty(folderName) ? String.Empty : folderName.Substring(folderName.Length - 1, 1) == "/" ? folderName : folderName + "/");
fileName = string.Format("{0}{1}", folderName, fileName);
var request = new ListObjectsRequest();
request.WithBucketName(clientContext.BucketName);
request.WithPrefix(fileName);
using (AmazonS3 client = clientContext.create_instance())
{
ListObjectsResponse response = wrap_request_in_error_handler(() => client.ListObjects(request));
var count = response.S3Objects.Count;
if (count == 1)
{
return(true);
}
}
return(false);
}
protected virtual long GetFolderSize(AmazonS3 client, string folderPath, string bucketName)
{
ListObjectsRequest request = new ListObjectsRequest();
request.WithBucketName(bucketName);
request.WithPrefix(folderPath);
long total = 0;
do
{
ListObjectsResponse response = client.ListObjects(request);
if (response != null && response.S3Objects != null)
{
total += response.S3Objects.Sum(s => s.Size);
}
if (response.IsTruncated)
{
request.Marker = response.NextMarker;
}
else
{
request = null;
}
} while (request != null);
return(total);
}
//***
public System.Tuple <bool, List <string> > ListObjectsInBucket(AmazonS3Client client, string bucketName)
{
try
{
ListObjectsRequest request = new ListObjectsRequest();
request.WithBucketName(bucketName);
ListObjectsResponse response = client.ListObjects(request);
List <string> retList = new List <string>();
foreach (S3Object s3Object in response.S3Objects)
{
retList.Add(s3Object.Key);
}
return(new System.Tuple <bool, List <string> >(false, retList));
}
catch (Exception e)
{
return(new System.Tuple <bool, List <string> >(false, new List <string>()
{
e.ToString()
}));
}
}
public static List <S3Object> s3_ObjectsRaw(this API_AmazonS3 amazonS3, string bucketName)
{
try
{
amazonS3.debugMsg("[API_AmazonS3]: retriving objects list for bucket:{0}", bucketName);
var listObjectsRequest = new ListObjectsRequest();
listObjectsRequest.WithBucketName(bucketName);
return(amazonS3.S3Client.ListObjects(listObjectsRequest).S3Objects);
}
catch (Exception ex)
{
ex.log("[API_AmazonS3]: in s3_ObjectsRaw()");
}
return(new List <S3Object>());
}
private static void ListObjects(AmazonS3 s3Client, string bucket)
{
var request = new ListObjectsRequest();
request.WithBucketName(bucket)
.WithPrefix("key")
.WithMaxKeys(4);
do
{
ListObjectsResponse response = s3Client.ListObjects(request);
if (response.IsTruncated)
{
request.Marker = response.NextMarker;
}
else
{
request = null;
}
} while (request != null);
}
/// <summary>
/// Delete a folder
/// </summary>
/// <param name="prefix">prefix</param>
public void DeleteFolder(string prefix)
{
// Get all object with specified prefix
var listRequest = new ListObjectsRequest();
listRequest.WithBucketName(_bucketName).WithPrefix(prefix);
var deleteRequest = new DeleteObjectsRequest();
deleteRequest.BucketName = _bucketName;
do
{
ListObjectsResponse listResponse = _client.ListObjects(listRequest);
// Add all object with specified prefix to delete request.
foreach (S3Object entry in listResponse.S3Objects)
{
deleteRequest.AddKey(entry.Key);
}
if (listResponse.IsTruncated)
{
listRequest.Marker = listResponse.NextMarker;
}
else
{
listRequest = null;
}
}while (listRequest != null);
// Delete all the object with specified prefix.
if (deleteRequest.Keys.Count > 0)
{
var deleteResponse = _client.DeleteObjects(deleteRequest);
deleteResponse.Dispose();
}
}
//removes all files with same prefix in S3 cloud
public static void RemoveAllObjectsWithPrefixS3(string filePath)
{
AmazonS3 client;
if (CheckS3Credentials())
{
NameValueCollection appConfig =
ConfigurationManager.AppSettings;
string accessKeyID = appConfig["AWSAccessKey"];
string secretAccessKeyID = appConfig["AWSSecretKey"];
using (client = Amazon.AWSClientFactory.CreateAmazonS3Client(
accessKeyID, secretAccessKeyID, RegionEndpoint.USWest1))
{
try
{
//first get all objects with the same prefix (in the same "folder")
ListObjectsRequest listRequest = new ListObjectsRequest();
listRequest.WithBucketName(Constants.AmazonS3BucketName)
.WithPrefix(filePath);
ListObjectsResponse listResponse = client.ListObjects(listRequest);
//delete all objects
DeleteObjectsRequest deleteRequest = new DeleteObjectsRequest();
deleteRequest.WithBucketName(Constants.AmazonS3BucketName);
foreach (S3Object obj in listResponse.S3Objects)
{
deleteRequest.AddKey(obj.Key);
}
//if there are any files to delete
if (deleteRequest.Keys.Count > 0)
{
S3Response response = client.DeleteObjects(deleteRequest);
response.Dispose();
}
}
catch (AmazonS3Exception amazonS3Exception)
{
if (amazonS3Exception.ErrorCode != null &&
(amazonS3Exception.ErrorCode.Equals("InvalidAccessKeyId")
||
amazonS3Exception.ErrorCode.Equals("InvalidSecurity")))
{
Console.WriteLine("Check the provided AWS Credentials.");
Console.WriteLine(
"For service sign up go to http://aws.amazon.com/s3");
}
else
{
Console.WriteLine(
"Error occurred. Message:'{0}' when deleting an object"
, amazonS3Exception.Message);
}
}
}
}
}
