Question

不幸的是，在以下情况下，我陷入了困境：

我正在使用.NET Core 3.1，并使用HttpClient（类型化客户端）通过DI从URL中获取数据。此数据是一个csv文件，应上传到Azure Blob存储。在这一点上，我试图将其上传到Blob存储，但似乎失败，但出现以下异常：

 System.Net.Http: The operation was canceled. System.Net.Http: Error while copying content to a stream. 
 System.Net.Sockets: Unable to read data from the transport connection: The I/O operation has been aborted because of either a thread exit or an application request.. 
 The I/O operation has been aborted because of either a thread exit or an application request.

我目前不知道为什么上传失败。来自其他流的其他上传似乎可以正常运行。你们中有人有我的头绪吗？

我的课程

public class Web<T> where T : BlobStorageContext
{

    private HttpClient _client { get; }
    private ILogger<Web> _logger;
    private Csv<T> _csv { get; }

    public Web(HttpClient client, Csv<T> csv, ILogger<Web> logger)
    {
        _client = client;
        _logger = logger;

        _csv = csv;
    }

    public async Task AccessWebFileAndSaveToAzureAsync()
    {
        ...

        var request = new HttpRequestMessage(HttpMethod.Get,
            url);
        
        using (var response = await _client.SendAsync(request))
        {
           
            await using (var str = await response.Content.ReadAsStreamAsync())
            {
                await _csv.WriteFileToAzureAsync(str);
            }
        }
    }
}


public class Csv<T> where T : BlobStorageContext
{
    private BlobServiceClient _blobServiceClient { get; set; }
    private ILogger<Csv<T>> _logger { get; set; }

    public Csv(IOptions<BlobStorageConfiguration<T>> configuration, ILogger<Csv<T>> logger)
    {
        _blobServiceClient = new BlobServiceClient(configuration.Value.ConnectionString());
        _logger = logger;
    }

    public async Task WriteFileToAzureAsync(Stream str)
    {
      
        var container = _blobServiceClient.GetBlobContainerClient("container);
        var blob = container.GetBlobClient(blobPath);
        await blob.UploadAsync(str, true);
    }
}

Answer 1

复制连接字符串并在upload_ToBlob（）方法中分配给storageAccount_connectionString变量

storageAccount_connectionString = "your Azure storage account connection string"

以下语句用于为存储帐户，Blob客户端和Blob容器创建对象。

CloudStorageAccount mycloudStorageAccount = CloudStorageAccount.Parse(storageAccount_connectionString);  
CloudBlobClient blobClient = mycloudStorageAccount.CreateCloudBlobClient(); 
CloudBlobContainer container = blobClient.GetContainerReference(azure_ContainerName);

此代码用于检查存储帐户中是否存在指定的容器。

如果存在，则应用程序将使用现有容器。否则，它将在具有指定名称的存储帐户内创建一个容器。

if (container.CreateIfNotExists())
{      
    container.SetPermissionsAsync(new    
    BlobContainerPermissions    
   {    
       PublicAccess =BlobContainerPublicAccessType.Blob    
   });
}

以下语句用于使用带有扩展名的文件名创建一个Block blob对象

CloudBlockBlob cloudBlockBlob = container.GetBlockBlobReference(filename_withExtension);

cloudBlockBlob.UploadFromStreamAsync（file）语句用于将文件上传到Blob存储。

将ResponseStream上传到Blob存储

1 个答案: