C# S3 Bucket TransferUtilityDownloadRequest 工作，但 TransferUtilityDownloadDirectoryRequest 没有

Question

我正在使用 TransferUtilityDownload 和 TransferUtilityDownloadDirectory 下载文件和完整目录。但是，即使我使用相同的存储桶名称格式，它也适用于单个文件但不适用于目录并返回 403 Access Denied。 （列出对象时同样的问题）：

        string bucketName = "my-bucket-us-east-1-prod";
        string UnscheduledIn = "abc/butter/input_butter_11nov2019/unscheduled";

        AmazonS3Client client = new AmazonS3Client(RegionEndpoint.USEast1);

        // request for object download
        var request = new TransferUtilityDownloadRequest(); 
        // request for directory download
        var drequest = new TransferUtilityDownloadDirectoryRequest();

        //This request for single file download
        request.BucketName = bucketName + "/" + UnscheduledIn;
        request.FilePath = "D:\\input\\" + "test.csv";
        request.Key = "test.csv";

        //This request for directory download
        drequest.BucketName = bucketName + "/" + UnscheduledIn;
        drequest.S3Directory = "unscheduled"; 
        drequest.LocalDirectory = "D:\\input\\";
        drequest.DownloadFilesConcurrently = true;

        TransferUtility fileTransferUtility = new TransferUtility(new AmazonS3Client(RegionEndpoint.USEast1));

        // This one works
        fileTransferUtility.Download(request);

        // This one does not work
        fileTransferUtility.DownloadDirectory(drequest); 

403 Access Denied 错误通常是由于错误的存储桶或目录名称（如果请求找不到存储桶或目录，这是一个已知问题）。但是存储桶名称和目录名称是正确的。我想知道是否缺少格式或设置某些属性？

快速注意此版本也返回相同的 403 错误：

               //This request for directory download
              drequest.BucketName = bucketName;
              drequest.S3Directory = UnscheduledIn; 
              drequest.LocalDirectory = "D:\\input\\";
              drequest.DownloadFilesConcurrently = true;

Answer 1

似乎存储桶名称和 s3 目录路径存在问题。使用这段代码更新您的代码。

//This request for directory download
drequest.BucketName = bucketName;
drequest.S3Directory = '/' + UnscheduledIn; 
drequest.LocalDirectory = "D:\\input";
drequest.DownloadFilesConcurrently = true;

更新：

一般来说，403 禁止来自服务器，以防身份验证失败/权限问题。 请检查您的存储桶政策以允许下载。

    {
      "Sid": "AllowAllS3ActionsInUserFolder",
      "Effect": "Allow",
      "Action": ["s3:*"],
      "Resource": ["arn:aws:s3:::my-bucket-us-east-1-prod/abc/butter/input_butter_11nov2019/*","arn:aws:s3:::my-bucket-us-east-1-prod/abc/butter/input_butter_11nov2019/unscheduled/*"]
    }