azure CloudBlobDirectory.ListBlobs()返回"指定的资源不存在.",但fetchAttributes()使用相同的数据工作

Question

当我尝试迭代ListBlobs()调用的结果时,我得到"指定的资源不存在"异常.我直接访问它时可以获取blob属性,但我正在尝试获取子目录中所有blob的列表.

我写了这个小测试来确切地看到问题所在.我有一个测试驱动程序和两个方法.第一个方法"GetBlockBlobDateTime"运行正常并返回现有blob的日期时间.第二种方法"GetBlobDirFiles"使用相同的输入,并在我尝试迭代blobItems时抛出excpetion.

foreach (IListBlobItem blobItem in blobItems)

请注意,两种方法都使用相同的数据.我错过了什么？

    public static void DoTest(string baseURL, string container, string directory, string fileName)
    {
        DateTime t = GetBlockBlobDateTime( baseURL,  container,  directory,  fileName);
        List<string> fileList = GetBlobDirFiles( baseURL,  container,  directory);
    }

    public static DateTime GetBlockBlobDateTime(string baseURL, string container, string directory, string fileName)
    {
        CloudBlobClient blobClient = new CloudBlobClient(baseURL);
        CloudBlobDirectory blobDir = blobClient.GetBlobDirectoryReference(container);
        CloudBlobDirectory subDirectory = blobDir.GetSubdirectory(directory);
        CloudBlockBlob cloudBlockBlob = subDirectory.GetBlockBlobReference(fileName);
        cloudBlockBlob.FetchAttributes();
        DateTime cloudTimeStampUTC = cloudBlockBlob.Properties.LastModifiedUtc;
        return cloudTimeStampUTC;
    }

    public static List<string> GetBlobDirFiles(string baseURL, string container, string directory)
    {
        CloudBlobClient blobClient = new CloudBlobClient(baseURL);
        CloudBlobDirectory blobDir = blobClient.GetBlobDirectoryReference(container);
        CloudBlobDirectory subDirectory = blobDir.GetSubdirectory(directory);
        IEnumerable<IListBlobItem> blobItems = subDirectory.ListBlobs();

        List<string> fileList = new List<string>();
        foreach (IListBlobItem blobItem in blobItems)
        {
            fileList.Add(blobItem.Uri.ToString());
        }
        return fileList;
    }

Answer 1

好的,我明白了:

显然,您不需要获取文件属性的权限,但您可以列出目录中的文件.

    CloudBlobClient blobClient = new CloudBlobClient(baseURL);

当您要获取这样的属性时,它会起作用:

    cloudBlockBlob.FetchAttributes();

但是你需要提供这样的凭证:

    CloudBlobClient blobClient = 
                    new CloudBlobClient(baseURL, 
                    new StorageCredentialsAccountAndKey(myAccount, myKey));

当你要列出这样的blob时:

        var blobList = subDirectory.ListBlobs();
        foreach (var blobInfo in blobList)