如何将 Azure 文件复制到 Azure Blob？

Question

我在 Azure 文件存储中有一些文件。

我正在尝试以编程方式将它们存档到 Azure Blob，但我不确定如何有效地。

我一直看到 code samples 关于从一个 blob 容器复制到另一个 blob 容器.. 但不是从 文件复制到 Blob.

是否可以不在本地下载整个文件内容然后上传此内容？也许使用 Uri 之类的？

更多信息：

文件容器和 Blob 容器在同一个存储帐户中。
存储帐户是RA-GRS

这是我想做的一些示例代码..但感觉不对:(（伪代码也..省略了验证和检查）。

var file = await ShareRootDirectory.GetFileReference(fileName);
using (var stream = new MemoryStream())
{
    await file.DownloadToStreamAsync(stream);

    // Custom method that basically does:
    // 1. GetBlockBlobReference
    // 2. UploadFromStreamAsync
    await cloudBlob.AddItemAsync("some-container", stream);
}

Answer 1

How to copy an Azure File to an Azure Blob?

我们也可以使用CloudBlockBlob.StartCopy(CloudFile)。 CloudFile 类型也可以被 CloudBlockBlob.StartCopy 函数接受。如何将CloudFile复制到blob请参考document。以下演示代码摘自文档。

// Parse the connection string for the storage account.
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(
    Microsoft.Azure.CloudConfigurationManager.GetSetting("StorageConnectionString"));

// Create a CloudFileClient object for credentialed access to File storage.
CloudFileClient fileClient = storageAccount.CreateCloudFileClient();

// Create a new file share, if it does not already exist.
CloudFileShare share = fileClient.GetShareReference("sample-share");
share.CreateIfNotExists();

// Create a new file in the root directory.
CloudFile sourceFile = share.GetRootDirectoryReference().GetFileReference("sample-file.txt");
sourceFile.UploadText("A sample file in the root directory.");

// Get a reference to the blob to which the file will be copied.
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
CloudBlobContainer container = blobClient.GetContainerReference("sample-container");
container.CreateIfNotExists();
CloudBlockBlob destBlob = container.GetBlockBlobReference("sample-blob.txt");

// Create a SAS for the file that's valid for 24 hours.
// Note that when you are copying a file to a blob, or a blob to a file, you must use a SAS
// to authenticate access to the source object, even if you are copying within the same
// storage account.
string fileSas = sourceFile.GetSharedAccessSignature(new SharedAccessFilePolicy()
{
    // Only read permissions are required for the source file.
    Permissions = SharedAccessFilePermissions.Read,
    SharedAccessExpiryTime = DateTime.UtcNow.AddHours(24)
});

// Construct the URI to the source file, including the SAS token.
Uri fileSasUri = new Uri(sourceFile.StorageUri.PrimaryUri.ToString() + fileSas);

// Copy the file to the blob.
destBlob.StartCopy(fileSasUri);

注：

If you are copying a blob to a file, or a file to a blob, you must use a shared access signature (SAS) to authenticate the source object, even if you are copying within the same storage account.

Answer 2

使用传输管理器： https://msdn.microsoft.com/en-us/library/azure/microsoft.windowsazure.storage.datamovement.transfermanager_methods.aspx

有一些方法可以从 CloudFile 复制到 CloudBlob。

添加 "Microsoft.Azure.Storage.DataMovement" nuget 包

using Microsoft.WindowsAzure.Storage.Blob;
using Microsoft.WindowsAzure.Storage.File;
using Microsoft.WindowsAzure.Storage.DataMovement;

private string _storageConnectionString = "your_connection_string_here";

public async Task CopyFileToBlob(string blobContainer, string blobPath, string fileShare, string fileName)
{
    CloudStorageAccount storageAccount = CloudStorageAccount.Parse(_connectionString);
    CloudFileShare cloudFileShare = storageAccount.CreateCloudFileClient().GetShareReference(fileShare);
    CloudFile source = cloudFileShare.GetRootDirectoryReference().GetFileReference(fileName);

    CloudBlobContainer blobContainer = storageAccount.CreateCloudBlobClient().GetContainerReference(blobContainer);
    CloudBlockBlob target = blobContainer.GetBlockBlobReference(blobPath);

    await TransferManager.CopyAsync(source, target, true);
}

如何将 Azure 文件复制到 Azure Blob？

How to copy an Azure File to an Azure Blob?

azure

azure-storage-files

azure-blob-storage