azure - 尝试将 blob 上传到 Azure 云时出现“MD5 不是已知的哈希算法”异常？

Question

我正在尝试使用 SAS 令牌在 Azure 中上传文件，但在尝试上传文件时收到此错误：

MD5 不是已知的哈希算法

我有这两种我使用的方法，一种是生成将用于上传文件的文件链接：

   public string GetBlobSASUploadFileLink(string fileName)
   {
            var connectionString = string.Format("DefaultEndpointsProtocol=https;AccountName={0};AccountKey={1}", StorageAccountName, AccessKey);
            var storageAccount = CloudStorageAccount.Parse(connectionString);
            CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
            CloudBlobContainer container = blobClient.GetContainerReference(FilesContainer);

            SharedAccessBlobPolicy sasConstraints = new SharedAccessBlobPolicy();
            sasConstraints.SharedAccessExpiryTime = DateTime.UtcNow.AddMinutes(5);
            sasConstraints.Permissions = SharedAccessBlobPermissions.Write | SharedAccessBlobPermissions.Create;

            var blob = container.GetBlockBlobReference(fileName);
            return string.Format("{0}{1}", blob.Uri, blob.GetSharedAccessSignature(sasConstraints));
   }

这个方法也会引发异常，它应该在 Azure 中上传文件：

 public async Task UploadFilesToBlob(string fileLink, IBrowserFile file)
 {
        try
        {
            var cloudBlockBlob = new CloudBlockBlob(new Uri(fileLink));
            await cloudBlockBlob.UploadFromStreamAsync(file.OpenReadStream(912000000));
        }
        catch (Exception ex)
        {

        }
  }

在该方法的第二个方法中，UploadFromStreamAsync抛出异常。我猜该框架使用 MD5 算法，但 Azure 使用另一种加密哈希算法，但我不知道应该做什么。

Answer 1

我按照官方示例代码进行了测试，效果很好。你可以参考我的测试代码。

测试结果：

示例代码如下：

    public static async Task MyFunc()
    {
        var filepath = @"C:\Users\jason\Desktop\1.txt";
        var file = new FileStream(filepath, FileMode.Open);

        CloudStorageAccount storageAccount;

        string container_name = "memorydumps";
        var policyName = "Pan";

        var connectionString = string.Format("DefaultEndpoi***;EndpointSuffix=core.windows.net");
        storageAccount = CloudStorageAccount.Parse(connectionString);
        CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
        CloudBlobContainer container = blobClient.GetContainerReference(container_name);
        container.CreateIfNotExists();

        var storedPolicy = new SharedAccessBlobPolicy()
        {
            SharedAccessExpiryTime = DateTime.UtcNow.AddMinutes(5),
            Permissions = SharedAccessBlobPermissions.Create |
              SharedAccessBlobPermissions.Write | SharedAccessBlobPermissions.Read
        };
        var permissions = container.GetPermissions();

        // optionally clear out any existing policies on this container
        permissions.SharedAccessPolicies.Clear();
        // add in the new one
        permissions.SharedAccessPolicies.Add(policyName, storedPolicy);
        // save back to the container
        container.SetPermissions(permissions);

        //reading file name & file extention    
        string file_extension = Path.GetExtension(filepath);
        string filename_withExtension = Path.GetFileName(filepath);

        CloudBlockBlob cloudBlockBlob = container.GetBlockBlobReference(filename_withExtension);
        cloudBlockBlob.Properties.ContentType = file_extension;
        await cloudBlockBlob.UploadFromStreamAsync(file);
        var returnpath = string.Format("{0}{1}", cloudBlockBlob.Uri, cloudBlockBlob.GetSharedAccessSignature(storedPolicy));
        Console.WriteLine(returnpath);
    }