private async Task <CompleteMultipartUploadResponse> MultipartCopy(string sourceKey, string destinationKey,
long objectSize, InitiateMultipartUploadRequest initiateRequest)
{
var copyResponses = new List <CopyPartResponse>();
var partSize = 5 * (long)Math.Pow(2, 20); // Part size is 5 MB.
// Initiate the upload.
var initResponse = await _s3Client.InitiateMultipartUploadAsync(initiateRequest);
long bytePosition = 0;
for (int i = 1; bytePosition < objectSize; i++)
{
var copyRequest = new CopyPartRequest
{
DestinationBucket = _bucket,
DestinationKey = destinationKey,
SourceBucket = _bucket,
SourceKey = sourceKey,
UploadId = initResponse.UploadId,
FirstByte = bytePosition,
LastByte = bytePosition + partSize - 1 >= objectSize ? objectSize - 1 : bytePosition + partSize - 1,
PartNumber = i,
};
copyResponses.Add(await _s3Client.CopyPartAsync(copyRequest));
bytePosition += partSize;
}
// Set up to complete the copy.
var completeRequest = new CompleteMultipartUploadRequest
{
BucketName = _bucket,
Key = destinationKey,
UploadId = initResponse.UploadId
};
completeRequest.AddPartETags(copyResponses);
// Complete the copy.
return(await _s3Client.CompleteMultipartUploadAsync(completeRequest));
}
/// <summary>
/// Provides the actual implementation to move or copy an S3 object
/// </summary>
/// <param name="client"></param>
/// <param name="request"></param>
/// <param name="partSize"></param>
/// <param name="deleteSource"></param>
/// <returns></returns>
private static async Task <CopyObjectRequestResponse> CopyOrMoveObjectAsync(this IAmazonS3 client, CopyObjectRequest request, long partSize, bool deleteSource, Func <long, long, bool> useMulitpart)
{
/// Handle operation cancelled exceptions
ExponentialBackoffAndRetryClient backoffClient = new ExponentialBackoffAndRetryClient(4, 100, 1000)
{
ExceptionHandlingLogic = (ex) =>
{
if (ex is OperationCanceledException)
{
return(true);
}
else
{
return(false);
}
}
};
try
{
ParameterTests.NonNull(request, "request");
ParameterTests.OutOfRange(partSize >= Constants.MINIMUM_MULTIPART_PART_SIZE, "partSize", $"The part size must be at least {Constants.MINIMUM_MULTIPART_PART_SIZE} bytes.");
ParameterTests.OutOfRange(partSize <= Constants.MAXIMUM_MULTIPART_PART_SIZE, "partSize", $"The part size cannot exceed {Constants.MAXIMUM_MULTIPART_PART_SIZE} bytes.");
if (request.SourceKey == request.DestinationKey &&
request.SourceBucket != null &&
request.SourceBucket.Equals(request.DestinationBucket, StringComparison.OrdinalIgnoreCase))
{
throw new SourceDestinationSameException("The source and destination of the copy operation cannot be the same.", new CopyObjectRequest[] { request });
}
// Get the size of the object.
GetObjectMetadataRequest metadataRequest = new GetObjectMetadataRequest
{
BucketName = request.SourceBucket,
Key = request.SourceKey
};
long objectSize;
GetObjectMetadataResponse metadataResponse;
try
{
metadataResponse = await backoffClient.RunAsync(() => client.GetObjectMetadataAsync(metadataRequest));
objectSize = metadataResponse.ContentLength; // Length in bytes.
}
catch (Exception e)
{
throw e;
}
CopyObjectResponse response = null;
if (UseMultipart(objectSize, partSize))
{
// If it takes more than a 5 GiB part to make 10000 or less parts, than this operation
// isn't supported for an object this size
if (objectSize / partSize > Constants.MAXIMUM_PARTS)
{
throw new NotSupportedException($"The object size, {objectSize}, cannot be broken into fewer than {Constants.MAXIMUM_PARTS} parts using a part size of {partSize} bytes.");
}
List <Task <CopyPartResponse> > copyResponses = new List <Task <CopyPartResponse> >();
// This property has a nullable backing private field that when set to
// anything non-null causes the x-amz-object-lock-retain-until-date
// header to be sent which in turn results in an exception being thrown
// that the Bucket is missing ObjectLockConfiguration
InitiateMultipartUploadRequest initiateRequest = request.ConvertTo <InitiateMultipartUploadRequest>("ObjectLockRetainUntilDate");
initiateRequest.BucketName = request.DestinationBucket;
initiateRequest.Key = request.DestinationKey;
InitiateMultipartUploadResponse initiateResponse = await backoffClient.RunAsync(() => client.InitiateMultipartUploadAsync(initiateRequest));
try
{
long bytePosition = 0;
int counter = 1;
// Launch all of the copy parts
while (bytePosition < objectSize)
{
CopyPartRequest copyRequest = request.ConvertTo <CopyPartRequest>("ObjectLockRetainUntilDate");
copyRequest.UploadId = initiateResponse.UploadId;
copyRequest.FirstByte = bytePosition;
// If we're on the last part, the last byte is the object size minus 1, otherwise the last byte is the part size minus one
// added to the current byte position
copyRequest.LastByte = ((bytePosition + partSize - 1) >= objectSize) ? objectSize - 1 : bytePosition + partSize - 1;
copyRequest.PartNumber = counter++;
copyResponses.Add(backoffClient.RunAsync(() => client.CopyPartAsync(copyRequest)));
bytePosition += partSize;
}
IEnumerable <CopyPartResponse> responses = (await Task.WhenAll(copyResponses)).OrderBy(x => x.PartNumber);
// Set up to complete the copy.
CompleteMultipartUploadRequest completeRequest = new CompleteMultipartUploadRequest
{
BucketName = request.DestinationBucket,
Key = request.DestinationKey,
UploadId = initiateResponse.UploadId
};
completeRequest.AddPartETags(responses);
// Complete the copy.
CompleteMultipartUploadResponse completeUploadResponse = await backoffClient.RunAsync(() => client.CompleteMultipartUploadAsync(completeRequest));
response = completeUploadResponse.CopyProperties <CopyObjectResponse>();
response.SourceVersionId = metadataResponse.VersionId;
}
catch (AmazonS3Exception e)
{
AbortMultipartUploadRequest abortRequest = new AbortMultipartUploadRequest()
{
BucketName = request.DestinationBucket,
Key = request.DestinationKey,
UploadId = initiateResponse.UploadId
};
await backoffClient.RunAsync(() => client.AbortMultipartUploadAsync(abortRequest));
throw e;
}
}
else
{
response = await backoffClient.RunAsync(() => client.CopyObjectAsync(request));
}
if (response.HttpStatusCode != HttpStatusCode.OK)
{
throw new AmazonS3Exception($"Could not copy object from s3://{request.SourceBucket}/{request.SourceKey} to s3://{request.DestinationBucket}/{request.DestinationKey}. Received response : {(int)response.HttpStatusCode}");
}
else
{
// We already checked to make sure the source and destination weren't the same
// and it's safe to delete the source object
if (deleteSource)
{
DeleteObjectRequest deleteRequest = new DeleteObjectRequest()
{
BucketName = request.SourceBucket,
Key = request.SourceKey
};
DeleteObjectResponse deleteResponse = await backoffClient.RunAsync(() => client.DeleteObjectAsync(deleteRequest));
if (deleteResponse.HttpStatusCode != HttpStatusCode.NoContent)
{
throw new AmazonS3Exception($"Could not delete s3://{request.SourceBucket}/{request.SourceKey}. Received response : {(int)deleteResponse.HttpStatusCode}");
}
}
return(new CopyObjectRequestResponse(request, response));
}
}
catch (Exception e)
{
return(null);
}
}
private static async Task CopyObjectAsync(IAmazonS3 s3Client, string base64Key)
{
List <CopyPartResponse> uploadResponses = new List <CopyPartResponse>();
// 1. Initialize.
InitiateMultipartUploadRequest initiateRequest = new InitiateMultipartUploadRequest
{
BucketName = existingBucketName,
Key = targetKeyName,
ServerSideEncryptionCustomerMethod = ServerSideEncryptionCustomerMethod.AES256,
ServerSideEncryptionCustomerProvidedKey = base64Key,
};
InitiateMultipartUploadResponse initResponse =
await s3Client.InitiateMultipartUploadAsync(initiateRequest);
// 2. Upload Parts.
long partSize = 5 * (long)Math.Pow(2, 20); // 5 MB
long firstByte = 0;
long lastByte = partSize;
try
{
// First find source object size. Because object is stored encrypted with
// customer provided key you need to provide encryption information in your request.
GetObjectMetadataRequest getObjectMetadataRequest = new GetObjectMetadataRequest()
{
BucketName = existingBucketName,
Key = sourceKeyName,
ServerSideEncryptionCustomerMethod = ServerSideEncryptionCustomerMethod.AES256,
ServerSideEncryptionCustomerProvidedKey = base64Key // " * **source object encryption key ***"
};
GetObjectMetadataResponse getObjectMetadataResponse = await s3Client.GetObjectMetadataAsync(getObjectMetadataRequest);
long filePosition = 0;
for (int i = 1; filePosition < getObjectMetadataResponse.ContentLength; i++)
{
CopyPartRequest copyPartRequest = new CopyPartRequest
{
UploadId = initResponse.UploadId,
// Source.
SourceBucket = existingBucketName,
SourceKey = sourceKeyName,
// Source object is stored using SSE-C. Provide encryption information.
CopySourceServerSideEncryptionCustomerMethod = ServerSideEncryptionCustomerMethod.AES256,
CopySourceServerSideEncryptionCustomerProvidedKey = base64Key, //"***source object encryption key ***",
FirstByte = firstByte,
// If the last part is smaller then our normal part size then use the remaining size.
LastByte = lastByte > getObjectMetadataResponse.ContentLength ?
getObjectMetadataResponse.ContentLength - 1 : lastByte,
// Target.
DestinationBucket = existingBucketName,
DestinationKey = targetKeyName,
PartNumber = i,
// Encryption information for the target object.
ServerSideEncryptionCustomerMethod = ServerSideEncryptionCustomerMethod.AES256,
ServerSideEncryptionCustomerProvidedKey = base64Key
};
uploadResponses.Add(await s3Client.CopyPartAsync(copyPartRequest));
filePosition += partSize;
firstByte += partSize;
lastByte += partSize;
}
// Step 3: complete.
CompleteMultipartUploadRequest completeRequest = new CompleteMultipartUploadRequest
{
BucketName = existingBucketName,
Key = targetKeyName,
UploadId = initResponse.UploadId,
};
completeRequest.AddPartETags(uploadResponses);
CompleteMultipartUploadResponse completeUploadResponse =
await s3Client.CompleteMultipartUploadAsync(completeRequest);
}
catch (Exception exception)
{
Console.WriteLine("Exception occurred: {0}", exception.Message);
AbortMultipartUploadRequest abortMPURequest = new AbortMultipartUploadRequest
{
BucketName = existingBucketName,
Key = targetKeyName,
UploadId = initResponse.UploadId
};
s3Client.AbortMultipartUpload(abortMPURequest);
}
}
private static async Task MPUCopyObjectAsync()
{
// Create a list to store the upload part responses.
List <UploadPartResponse> uploadResponses = new List <UploadPartResponse>();
List <CopyPartResponse> copyResponses = new List <CopyPartResponse>();
// Setup information required to initiate the multipart upload.
InitiateMultipartUploadRequest initiateRequest =
new InitiateMultipartUploadRequest
{
BucketName = targetBucket,
Key = targetObjectKey
};
// Initiate the upload.
InitiateMultipartUploadResponse initResponse =
await s3Client.InitiateMultipartUploadAsync(initiateRequest);
// Save the upload ID.
String uploadId = initResponse.UploadId;
try
{
// Get the size of the object.
GetObjectMetadataRequest metadataRequest = new GetObjectMetadataRequest
{
BucketName = sourceBucket,
Key = sourceObjectKey
};
GetObjectMetadataResponse metadataResponse =
await s3Client.GetObjectMetadataAsync(metadataRequest);
long objectSize = metadataResponse.ContentLength; // Length in bytes.
// Copy the parts.
long partSize = 5 * (long)Math.Pow(2, 20); // Part size is 5 MB.
long bytePosition = 0;
for (int i = 1; bytePosition < objectSize; i++)
{
CopyPartRequest copyRequest = new CopyPartRequest
{
DestinationBucket = targetBucket,
DestinationKey = targetObjectKey,
SourceBucket = sourceBucket,
SourceKey = sourceObjectKey,
UploadId = uploadId,
FirstByte = bytePosition,
LastByte = bytePosition + partSize - 1 >= objectSize ? objectSize - 1 : bytePosition + partSize - 1,
PartNumber = i
};
copyResponses.Add(await s3Client.CopyPartAsync(copyRequest));
bytePosition += partSize;
}
// Set up to complete the copy.
CompleteMultipartUploadRequest completeRequest =
new CompleteMultipartUploadRequest
{
BucketName = targetBucket,
Key = targetObjectKey,
UploadId = initResponse.UploadId
};
completeRequest.AddPartETags(copyResponses);
// Complete the copy.
CompleteMultipartUploadResponse completeUploadResponse =
await s3Client.CompleteMultipartUploadAsync(completeRequest);
}
catch (AmazonS3Exception e)
{
Console.WriteLine("Error encountered on server. Message:'{0}' when writing an object", e.Message);
}
catch (Exception e)
{
Console.WriteLine("Unknown encountered on server. Message:'{0}' when writing an object", e.Message);
}
}
