public override Task <bool> ExistsAsync(FileProviderExistsArgs args)
{
var containerName = GetContainerName(args);
var blobName = AliyunFileNameCalculator.Calculate(args);
var ossClient = GetOssClient(args.Configuration);
return(Task.FromResult(FileExistsAsync(ossClient, containerName, blobName)));
}
public override Task <bool> DeleteAsync(FileProviderDeleteArgs args)
{
var containerName = GetContainerName(args);
var fileName = AliyunFileNameCalculator.Calculate(args);
var ossClient = GetOssClient(args.Configuration);
if (!FileExistsAsync(ossClient, containerName, fileName))
{
return(Task.FromResult(false));
}
ossClient.DeleteObject(containerName, fileName);
return(Task.FromResult(true));
}
public override async Task <Stream> GetOrNullAsync(FileProviderGetArgs args)
{
var containerName = GetContainerName(args);
var blobName = AliyunFileNameCalculator.Calculate(args);
var ossClient = GetOssClient(args.Configuration);
if (!FileExistsAsync(ossClient, containerName, blobName))
{
return(null);
}
var result = ossClient.GetObject(containerName, blobName);
var memoryStream = new MemoryStream();
await result.Content.CopyToAsync(memoryStream);
return(memoryStream);
}
public override async Task <bool> DownloadAsync(FileProviderDownloadArgs args)
{
var containerName = GetContainerName(args);
var fileName = AliyunFileNameCalculator.Calculate(args);
var ossClient = GetOssClient(args.Configuration);
if (!FileExistsAsync(ossClient, containerName, fileName))
{
return(false);
}
var result = ossClient.GetObject(containerName, fileName);
using (var fs = new FileStream(args.Path, FileMode.OpenOrCreate, FileAccess.ReadWrite))
{
await result.Content.CopyToAsync(fs);
}
return(true);
}
public override Task <string> GetAccessUrlAsync(FileProviderAccessArgs args)
{
if (!args.Configuration.HttpAccess)
{
return(Task.FromResult(string.Empty));
}
var containerName = GetContainerName(args);
var fileName = AliyunFileNameCalculator.Calculate(args);
var ossClient = GetOssClient(args.Configuration);
if (!FileExistsAsync(ossClient, containerName, fileName))
{
return(Task.FromResult(string.Empty));
}
var datetime = args.Expires ?? Clock.Now.AddSeconds(600);
var uri = ossClient.GeneratePresignedUri(containerName, fileName, datetime);
return(Task.FromResult(uri.ToString()));
}
public override Task <string> SaveAsync(FileProviderSaveArgs args)
{
var containerName = GetContainerName(args);
var fileName = AliyunFileNameCalculator.Calculate(args);
var aliyunConfig = args.Configuration.GetAliyunConfiguration();
var ossClient = GetOssClient(aliyunConfig);
if (!args.OverrideExisting && FileExistsAsync(ossClient, containerName, fileName))
{
throw new FileAlreadyExistsException($"Saving FILE '{args.FileId}' does already exists in the container '{containerName}'! Set {nameof(args.OverrideExisting)} if it should be overwritten.");
}
if (aliyunConfig.CreateContainerIfNotExists)
{
if (!ossClient.DoesBucketExist(containerName))
{
ossClient.CreateBucket(containerName);
}
}
ossClient.PutObject(containerName, fileName, args.FileStream);
return(Task.FromResult(args.FileId));
}
