将文件从一个Azure存储帐户复制到另一个

Question

我正在尝试使用StartCopy方法将文件从一个存储帐户复制到另一个帐户，以复制文件。 检查以下代码。

CloudStorageAccount sourceStorageAccount = CloudStorageAccount.Parse(@"source storage account connection string");
CloudStorageAccount destStorageAccount = CloudStorageAccount.Parse(@"destination storage account connection string");

CloudBlobClient sourceBlobClient = sourceStorageAccount.CreateCloudBlobClient();
CloudBlobClient destBlobClient = destStorageAccount.CreateCloudBlobClient();
var sourceContainer = sourceBlobClient.GetContainerReference("sourceContainer");
var destContainer = destBlobClient.GetContainerReference("destContainer");

CloudBlockBlob sourceBlob = sourceContainer.GetBlockBlobReference("copy.txt");
CloudBlockBlob targetBlob = destContainer.GetBlockBlobReference("copy.txt");

targetBlob.StartCopy(sourceBlob);

但是它总是返回以下错误。

Microsoft.WindowsAzure.Storage.StorageException：远程服务器返回错误：（404）未找到。

我在这里想念什么？

请注意，如果我尝试将文件从一个容器复制到同一存储帐户中的另一个容器，则相同的代码可以完美地工作。

Answer 1

请看以下示例，了解如何执行复制（摘自异步跨帐户复制Blob介绍 ）：

public static void CopyBlobs(
            CloudBlobContainer srcContainer,  
            string policyId, 
            CloudBlobContainer destContainer)
{
    // get the SAS token to use for all blobs
    string blobToken = srcContainer.GetSharedAccessSignature(
                   new SharedAccessBlobPolicy(), policyId);


    var srcBlobList = srcContainer.ListBlobs(true, BlobListingDetails.None);
    foreach (var src in srcBlobList)
    {
        var srcBlob = src as CloudBlob;

        // Create appropriate destination blob type to match the source blob
        CloudBlob destBlob;
        if (srcBlob.Properties.BlobType == BlobType.BlockBlob)
        {
            destBlob = destContainer.GetBlockBlobReference(srcBlob.Name);
        }
        else
        {
            destBlob = destContainer.GetPageBlobReference(srcBlob.Name);
        }

        // copy using src blob as SAS
        destBlob.StartCopyFromBlob(new Uri(srcBlob.Uri.AbsoluteUri + blobToken));
    }
}

希望能帮助到你！

Answer 2

这是使用TransferManager.CopyAsync方法执行此操作的另一种方法

CloudStorageAccount sourceStorageAccount = CloudStorageAccount.Parse(@"source storage account connection string");
CloudStorageAccount destStorageAccount = CloudStorageAccount.Parse(@"destination storage account connection string");

CloudBlobClient sourceBlobClient = sourceStorageAccount.CreateCloudBlobClient();
CloudBlobClient destBlobClient = destStorageAccount.CreateCloudBlobClient();
var sourceContainer = sourceBlobClient.GetContainerReference("sourceContainer");
var destContainer = destBlobClient.GetContainerReference("destContainer");

CloudBlockBlob sourceBlob = sourceContainer.GetBlockBlobReference("copy.txt");
CloudBlockBlob targetBlob = destContainer.GetBlockBlobReference("copy.txt");

TransferManager.CopyAsync(sourceBlob, targetBlob, true).Wait();

TransferManager在名称空间Microsoft.WindowsAzure.Storage.DataMovement 。 要获取参考，请在nuget管理器中安装Microsoft.Azure.Storage.DataMovement 。

Answer 3

我最近在尝试在单个Blob帐户中从/ uploads复制到/ raw时遇到此错误。

问题是容器/ raw在测试环境中的目标端不存在。

（即，此错误实际上是由目标而不是源引发的）