public override Stream GetStream(FileSystemObject fso)
{
var bki = new S3BucketKeyInfo(fso.FullName);
var request = new GetObjectRequest
{
BucketName = bki.BucketName,
Key = bki.Key
};
try
{
return S3Client.GetObject(request).ResponseStream;
}
catch (AmazonS3Exception s3x)
{
if (IsMissingObjectException(s3x))
return null;
throw;
}
}
public override void Store(Stream stream, FileSystemObject fso)
{
var bki = new S3BucketKeyInfo(fso);
var attemptedBucketCreate = false;
do
{
try
{
var request = new PutObjectRequest
{
BucketName = bki.BucketName,
Key = bki.Key,
InputStream = stream,
StorageClass = S3StorageClass.Standard
};
S3Client.PutObject(request);
break;
}
catch (AmazonS3Exception s3x)
{
if (!attemptedBucketCreate && IsMissingObjectException(s3x))
{
CreateFolder(fso.FolderName);
attemptedBucketCreate = true;
continue;
}
throw;
}
} while (true);
}
public override void CreateFolder(string path)
{
if (string.IsNullOrEmpty(path))
return;
var bki = new S3BucketKeyInfo(path);
var request = new PutBucketRequest
{
BucketName = bki.BucketName,
UseClientRegion = true
};
S3Client.PutBucket(request);
}
private ListObjectsResponse ListFolderResponse(S3BucketKeyInfo bki, string nextMarker = null)
{
try
{
var listRequest = new ListObjectsRequest
{
BucketName = bki.BucketName
};
if (!string.IsNullOrEmpty(nextMarker))
{
listRequest.Marker = nextMarker;
}
if (bki.HasPrefix)
{
listRequest.Prefix = bki.Prefix;
}
var listResponse = S3Client.ListObjects(listRequest);
return listResponse;
}
catch (System.Xml.XmlException) { }
catch (AmazonS3Exception s3x)
{
if (!IsMissingObjectException(s3x))
{
throw;
}
}
return null;
}
private void DeleteFolderInternal(string path, bool recursive)
{
if (string.IsNullOrEmpty(path))
{
return;
}
var bki = new S3BucketKeyInfo(path, terminateWithPathDelimiter: true);
if (recursive)
{
while (true)
{
var objects = ListFolder(bki);
if (!objects.Any())
break;
var keys = objects.Select(o => new KeyVersion
{
Key = o.Key
})
.ToList();
var deleteObjectsRequest = new DeleteObjectsRequest
{
BucketName = bki.BucketName,
Quiet = true,
Objects = keys
};
S3Client.DeleteObjects(deleteObjectsRequest);
}
}
else if (!bki.IsBucketObject)
{
var deleteObjectRequest = new DeleteObjectRequest
{
BucketName = bki.BucketName,
Key = bki.Key
};
S3Client.DeleteObject(deleteObjectRequest);
}
if (bki.IsBucketObject)
{
var request = new DeleteBucketRequest
{
BucketName = bki.BucketName,
UseClientRegion = true
};
S3Client.DeleteBucket(request);
}
}
public override IEnumerable<string> ListFolder(string folderName, bool recursive = false, bool fileNamesOnly = false)
{
if (string.IsNullOrEmpty(folderName))
{
yield break;
}
string nextMarker = null;
var bki = new S3BucketKeyInfo(folderName, terminateWithPathDelimiter: true);
do
{
var listResponse = ListFolderResponse(bki, nextMarker);
if (listResponse == null || listResponse.S3Objects == null)
break;
var filesOnly = listResponse.S3Objects
.Select(o => new S3BucketKeyInfo(bki.BucketName, o))
.Where(b => !string.IsNullOrEmpty(b.FileName))
.Where(b => recursive
? b.Prefix.StartsWith(bki.Prefix, StringComparison.InvariantCulture)
: b.Prefix.Equals(bki.Prefix, StringComparison.InvariantCulture))
.Select(b => fileNamesOnly
? b.FileName
: b.ToString()
);
foreach (var file in filesOnly)
{
yield return file;
}
if (listResponse.IsTruncated)
{
nextMarker = listResponse.NextMarker;
}
else
{
break;
}
} while (true);
}
private List<S3Object> ListFolder(S3BucketKeyInfo bki)
{
var listResponse = ListFolderResponse(bki);
return listResponse == null
? new List<S3Object>()
: listResponse.S3Objects ?? new List<S3Object>();
}
public override bool FolderExists(string path)
{
if (string.IsNullOrEmpty(path))
{
return false;
}
var bki = new S3BucketKeyInfo(path);
// Folders aren't a thing in S3, buckets are the only things that actually matter more or less. Return true
// if this is a bucket object and the bucket exists, otherwise false since it actually doesn't exist
return bki.IsBucketObject && BucketExists(bki);
}
private bool BucketExists(S3BucketKeyInfo bki)
{
if (string.IsNullOrEmpty(bki.BucketName))
{
return false;
}
try
{
var bucketLocation = S3Client.GetBucketLocation(bki.BucketName);
return true;
}
catch (AmazonS3Exception s3x)
{
if (IsMissingObjectException(s3x))
{
return false;
}
throw;
}
}
public override bool Exists(FileSystemObject fso)
{
var bki = new S3BucketKeyInfo(fso.FullName);
var s3FileInfo = new S3FileInfo(S3Client, bki.BucketName, bki.Key);
return s3FileInfo.Exists;
}
private void GetToLocalFile(FileSystemObject fso, FileSystemObject downloadToFso)
{
var bki = new S3BucketKeyInfo(fso.FullName);
var request = new GetObjectRequest
{
BucketName = bki.BucketName,
Key = bki.Key
};
localFs.CreateFolder(downloadToFso.FolderName);
localFs.Delete(downloadToFso);
using (var response = S3Client.GetObject(request))
{
response.WriteResponseStreamToFile(downloadToFso.FullName);
}
}
private void CopyInS3(FileSystemObject sourceFso, FileSystemObject targetFso)
{
if (sourceFso.Equals(targetFso))
{
return;
}
var sourceBki = new S3BucketKeyInfo(sourceFso);
var targetBki = new S3BucketKeyInfo(targetFso);
var request = new CopyObjectRequest
{
SourceBucket = sourceBki.BucketName,
SourceKey = sourceBki.Key,
DestinationBucket = targetBki.BucketName,
DestinationKey = targetBki.Key
};
S3Client.CopyObject(request);
}
private void Delete(S3BucketKeyInfo bki)
{
var request = new DeleteObjectRequest
{
BucketName = bki.BucketName,
Key = bki.Key
};
try
{
S3Client.DeleteObject(request);
}
catch (AmazonS3Exception s3x)
{
if (IsMissingObjectException(s3x))
{
return;
}
throw;
}
}
public override void Delete(FileSystemObject fso)
{
var bki = new S3BucketKeyInfo(fso);
Delete(bki);
}
