public override async Task <string> SaveAsync(FileProviderSaveArgs args)
{
var fileName = S3FileNameCalculator.Calculate(args);
var configuration = args.Configuration.GetS3Configuration();
var client = GetS3Client(args);
var containerName = GetContainerName(args);
if (!args.OverrideExisting && await FileExistsAsync(client, containerName, fileName, args.CancellationToken))
{
throw new FileAlreadyExistsException($"Saving File '{args.FileId}' does already exists in the container '{containerName}'! Set {nameof(args.OverrideExisting)} if it should be overwritten.");
}
if (configuration.CreateBucketIfNotExists)
{
await CreateBucketIfNotExists(client, containerName);
}
if (configuration.EnableSlice && (args.FileStream.Length > configuration.SliceSize))
{
await MultipartUploadInternal(client, containerName, fileName, args.FileStream, configuration.UseChunkEncoding, configuration.SliceSize);
}
else
{
await SingleUploadInternal(client, containerName, fileName, args.FileStream, configuration.UseChunkEncoding);
}
args.FileStream?.Dispose();
return(fileName);
}
public override async Task <bool> ExistsAsync(FileProviderExistsArgs args)
{
var fileName = S3FileNameCalculator.Calculate(args);
var client = GetS3Client(args);
var containerName = GetContainerName(args);
return(await FileExistsAsync(client, containerName, fileName, args.CancellationToken));
}
public override async Task <bool> DownloadAsync(FileProviderDownloadArgs args)
{
var fileName = S3FileNameCalculator.Calculate(args);
var client = GetS3Client(args);
var containerName = GetContainerName(args);
var getObjectResponse = await client.GetObjectAsync(containerName, fileName);
await getObjectResponse.WriteResponseStreamToFileAsync(args.Path, true, args.CancellationToken);
return(true);
}
public override async Task <bool> DeleteAsync(FileProviderDeleteArgs args)
{
var fileName = S3FileNameCalculator.Calculate(args);
var client = GetS3Client(args);
var containerName = GetContainerName(args);
if (await FileExistsAsync(client, containerName, fileName, args.CancellationToken))
{
await client.DeleteAsync(containerName, fileName, null, args.CancellationToken);
return(true);
}
return(false);
}
public override async Task <Stream> GetOrNullAsync(FileProviderGetArgs args)
{
var fileName = S3FileNameCalculator.Calculate(args);
var client = GetS3Client(args);
var containerName = GetContainerName(args);
if (!await FileExistsAsync(client, containerName, fileName, args.CancellationToken))
{
return(null);
}
var getObjectResponse = await client.GetObjectAsync(containerName, fileName);
if (getObjectResponse.ResponseStream != null)
{
var memoryStream = new MemoryStream();
await getObjectResponse.ResponseStream.CopyToAsync(memoryStream);
return(memoryStream);
}
return(null);
}
public override Task <string> GetAccessUrlAsync(FileProviderAccessArgs args)
{
var fileName = S3FileNameCalculator.Calculate(args);
var client = GetS3Client(args);
var containerName = GetContainerName(args);
var configuration = args.Configuration.GetS3Configuration();
var preSignedUrlRequest = new GetPreSignedUrlRequest()
{
BucketName = containerName,
Key = fileName,
Protocol = (Protocol)configuration.Protocol
};
if (args.Expires.HasValue)
{
preSignedUrlRequest.Expires = args.Expires.Value;
}
var accessUrl = client.GetPreSignedURL(preSignedUrlRequest);
return(Task.FromResult(accessUrl));
}
