根据前缀获取 azure blob 结构的完整层次结构

Question

我的 Azure 存储容器中有以下层次结构：

Container  
-- Folder 1  
  -- Folder 2  
     -- Folder 2.1  
       -- File 1  
       -- File 2  
       -- File 3

我正在寻找的是一个通用函数，我可以在其中传递字符串，例如“container/Folder1/Folder2”，它 return 我的层次结构，即

-- Folder 2.1  
   -- File 1  
   -- File 2  
   -- File 3

我有以下代码，但在此我无法将前缀作为“container/Folder1/Folder2”传递。如果我在前缀字符串中添加“/”，则会抛出无效 uri 字符串的错误。

    static void printCloudDirectories(IEnumerable<IListBlobItem> blobList, Container cont)
    {
        foreach (var blobitem in blobList)
        {
            if (blobitem is CloudBlobDirectory)
            {
                var container = new Container();
                var directory = blobitem as CloudBlobDirectory;
                Console.WriteLine(directory.Prefix);
                container.Name = directory.Prefix;
                BlobContinuationToken token = null;
                var directories = directory.ListBlobsSegmentedAsync(token).Result.Results;
                printCloudDirectories(directories, container);
                cont.Containers.Add(container);
            }
            else
            {
                cont.Children.Add(blobitem.Uri.AbsoluteUri);
            }
        }
    }

    public static void ListClientMethod(CloudBlobClient cloudBlobClient)
    {
        BlobContinuationToken token = null;
        var containerSegments = cloudBlobClient.ListContainersSegmentedAsync(token).Result;
        List<Container> containers = new List<Container>();
        foreach (var container in containerSegments.Results)
        {
            Console.WriteLine("Container: " + container.Name);
            var cont = new Container();
            cont.Name = container.Name;
            // ADD A CALL TO printCloudDirectories:
            BlobContinuationToken token1 = null;
            var blobs = container.ListBlobsSegmentedAsync(token1).Result.Results;
            printCloudDirectories(blobs, cont);
            containers.Add(cont);
        }
    }
    public class Container
{
    public Container()
    {
        Children = new List<string>();
        Containers = new List<Container>();
    }

    public string Name { get; set; }

    public List<string> Children { get; set; }

    public List<Container> Containers { get; set; }
}

我使用c#作为编码语言

Answer 1

请使用ListBlobsSegmentedAsync(String, Boolean, BlobListingDetails, Nullable<Int32>, BlobContinuationToken, BlobRequestOptions, OperationContext)方法。

此方法的第一个参数是 Blob Prefix，您需要在此处指定 Folder 1/Folder 2/。

此方法的第二个参数是 useFlatBlobListing，您需要为此传递 true。

它应该 return 你得到这样的结果：

Folder 1/Folder 2/Folder 2.1/File 1
Folder 1/Folder 2/Folder 2.1/File 2
Folder 1/Folder 2/Folder 2.1/File 3

你应该能够基于此构建所需的树视图。

根据前缀获取 azure blob 结构的完整层次结构

Get complete hierarchy of azure blob structure based on prefix

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blobstorage