c# - 使用 WriteRange 和 MD5 上传 Azure 文件存储已被淘汰

Question

我正在尝试使用 C# REST API 库上传 Azure 存储中的文件。我希望能够上传具有上传百分比的文件，因此我查看了文档并尝试使用 WriteRange 方法来实现此目的。

它可以工作，但我无法存储文件的 MD5(以及稍后检索它)。

这是我的重现案例:

static void Main(string[] args)
{
    var storageAccount = CloudStorageAccount.Parse(connectionString);
    var fileClient = storageAccount.CreateCloudFileClient();
    var share = fileClient.GetShareReference(shareReference);
    var rootDir = share.GetRootDirectoryReference();

    var firstFileCloudName = "test/file1.txt";
    var firstFilePath = "c:\\test\\file1.txt";
    var secondFileCloudName = "test/file2.txt";
    var secondFilePath = "c:\\test\\file2.txt";

    // upload first file
    var firstFile = rootDir.GetFileReference(firstFileCloudName);
    firstFile.UploadFromFile(firstFilePath, options: new FileRequestOptions { StoreFileContentMD5 = true });

    // check md5 of first file
    var checkFirstFile = rootDir.GetFileReference(firstFileCloudName);
    if (checkFirstFile.Exists() && checkFirstFile.Properties.ContentMD5 == Convert.ToBase64String(MD5.Create().ComputeHash(File.ReadAllBytes(firstFilePath))))
    {
        Console.WriteLine("First file OK"); // OK
    }

    // upload second file with chunks
    var secondFile = rootDir.GetFileReference(secondFileCloudName);
    Upload(secondFile, secondFilePath);

    // check md5 of second file
    var checksecondFile = rootDir.GetFileReference(secondFileCloudName);
    if (checksecondFile.Exists() && checksecondFile.Properties.ContentMD5 == Convert.ToBase64String(MD5.Create().ComputeHash(File.ReadAllBytes(secondFilePath))))
    {
        Console.WriteLine("Second file OK"); // KO !!!
    }

    // but the file is correctly uploaded because downloaded md5 is OK
    var downloadedFile = rootDir.GetFileReference(secondFileCloudName);
    var memoryStream = new MemoryStream();
    downloadedFile.DownloadToStream(memoryStream);
    if (Convert.ToBase64String(MD5.Create().ComputeHash(memoryStream.ToArray())) == Convert.ToBase64String(MD5.Create().ComputeHash(File.ReadAllBytes(secondFilePath))))
    {
        Console.WriteLine("Second file downloaded OK"); // KO !!!
    }
}

private static void Upload(CloudFile currentFile, string file)
{
    var options = new FileRequestOptions { StoreFileContentMD5 = true };

    long bytesToUpload = new FileInfo(file).Length;
    long fileSize = bytesToUpload;
    currentFile.Create(fileSize);
    var blockSize = 256 * 1024;
    currentFile.StreamWriteSizeInBytes = blockSize;
            
    int index = 1;
    long startPosition = 0;
    long bytesUploaded = 0;
    var allBytes = File.ReadAllBytes(file);
    var ms = new MemoryStream(allBytes);

    do
    {
        var bytesToRead = Math.Min(blockSize, bytesToUpload);
        var blobContents = new byte[bytesToRead];
        ms.Position = startPosition;
        ms.Read(blobContents, 0, (int)bytesToRead);

        var md5 = Convert.ToBase64String(MD5.Create().ComputeHash(new MemoryStream(blobContents)));
        currentFile.WriteRange(new MemoryStream(blobContents), startPosition, md5, options: options);

        bytesUploaded += bytesToRead;
        bytesToUpload -= bytesToRead;
        startPosition += bytesToRead;
        index++;
        double percentComplete = (double)bytesUploaded / fileSize;
        Console.WriteLine("Percent complete = " + percentComplete.ToString("P"));
    }
    while (bytesToUpload > 0);

    currentFile.SetProperties(options: options);
}

一些解释:

第一种情况，使用 UploadFromFile 上传:它正在工作，我可以存储和读取 MD5。 (我可以在azure门户中看到MD5正确存储在属性中)

第二种情况，自定义上传时，ContentMD5 为空。 (我可以在azure门户中看到MD5未存储在属性中)

但是当我下载第二个文件并计算md5时，该文件是正确的，因此上传可以。

如何将 MD5 存储在 Azure 文件中并进行第二次上传？ (或用百分比更改上传方式)

Answer 1

其实上传结束后，我可以手动设置MD5；我以为这只是得到:

currentFile.Properties.ContentMD5 = md5;
currentFile.SetProperties();