使用共享访问密钥上载到Azure Blob存储

Question

UPD:这是我实现的这个问题的解决方案

我正在尝试通过Azure.Storage库(不是REST API)上传到Azure blob存储,并通过共享访问密钥进行身份验证.

我看过这篇博文,但是自帖子以来API已经发生了变化,现在我无法得到相同的结果.

这是我有的:

var blobClient = new CloudBlobClient(new Uri(blobWithSas.BaseUri), new StorageCredentials(blobWithSas.Sas));


// here I receive 404 error
var blob = blobClient.GetBlobReferenceFromServer(new Uri(blobWithSas.AbsoluteUri));

using (var stream = new FileStream(fullFilePath, FileMode.Open))
{
    blob.UploadFromStream(stream);
}

有:

blobWithSas.BaseUri= http://127.0.0.1:10000/devstoreaccount1/a6dc9274-6ce1-4095-be6b-e84d1012cb24(Guid是容器的名称,已存在,在其他地方创建.)

blobWithSas.Sas= ?sv=2012-02-12&se=2013-06-23T03%3A04%3A53Z&sr=b&sp=w&sig=NaMqgXRMXDFvLAp8LTskgplAKp%2B9LCZzq8WK9Zo35x8%3D(也在代码中的其他地方发布)

blobWithSas.AbsoluteUri = http://127.0.0.1:10000/devstoreaccount1/a6dc9274-6ce1-4095-be6b-e84d1012cb24/foldername/filename.txt

blob不存在,我想上传新文件并创建一个blob.我有"服务器"应用程序持有Azure存储帐户的访问密钥.服务器将向客户端发出SAS,客户端将文件直接上载到Azure.所以SAS只会写,没有阅读,客户端将创建服务器告诉他们的文件(容器,文件夹名称)

问题出现了GetBlobReferenceFromServer- 我从Azure存储中收到404错误.是的,blob不存在且没有引用.因此,给定CloudBlobClient,如何将文件上传到blob？

ps我意识到这些东西有REST API.但我之前使用过Microsoft.WindowsAzure.Storage库,如果可能的话,我希望避免使用REST服务.

Answer 1

GetBlobReferenceFromServer出现问题 - 我从Azure存储中收到404错误.是的,blob不存在且没有引用.因此,给定CloudBlobClient,如何将文件上传到blob？

为了GetBlobReferenceFromServer工作,blob必须存在于blob存储中.-当你知道BLOB存储存在,想找出BLOB类型这是在场景中有用Block Blob或Page Blob.

如果要通过从本地计算机上载文件来创建块blob,可以执行以下操作:

    var blob = new CloudBlockBlob(new Uri(blobWithSas.AbsoluteUri), new StorageCredentials(blobWithSas.Sas));
using (var stream = new FileStream(fullFilePath, FileMode.Open))
{
    blob.UploadFromStream(stream);
}

为了实现共享访问签名功能,我不久前写了一篇博文:http://gauravmantri.com/2013/02/13/revisiting-windows-azure-shared-access-signature/.您可以将其称为史蒂夫博客文章的第2版:).我已经展示了使用REST API和Storage Client Library 2.0上传具有共享访问签名的blob的示例.

博客文章中的一些代码示例:

使用存储客户端库:

/// <summary>
/// Uploads a blob in a blob container where SAS permission is defined on a blob container using storage client library.
/// </summary>
/// <param name="blobContainerSasUri"></param>
static void UploadBlobWithStorageClientLibrarySasPermissionOnBlobContainer(string blobContainerSasUri)
{
    CloudBlobContainer blobContainer = new CloudBlobContainer(new Uri(blobContainerSasUri));
    CloudBlockBlob blob = blobContainer.GetBlockBlobReference("sample.txt");
    string sampleContent = "This is sample text.";
    using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(sampleContent)))
    {
        blob.UploadFromStream(ms);
    }
}

使用REST API:

/// <summary>
/// Uploads a blob in a blob container where SAS permission is defined on a blob container using REST API.
/// </summary>
/// <param name="blobContainerSasUri"></param>
static void UploadBlobWithRestAPISasPermissionOnBlobContainer(string blobContainerSasUri)
{
    string blobName = "sample.txt";
    string sampleContent = "This is sample text.";
    int contentLength = Encoding.UTF8.GetByteCount(sampleContent);
    string queryString = (new Uri(blobContainerSasUri)).Query;
    string blobContainerUri = blobContainerSasUri.Split('?')[0];
    string requestUri = string.Format(CultureInfo.InvariantCulture, "{0}/{1}{2}", blobContainerUri, blobName, queryString);
    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(requestUri);
    request.Method = "PUT";
    request.Headers.Add("x-ms-blob-type", "BlockBlob");
    request.ContentLength = contentLength;
    using (Stream requestStream = request.GetRequestStream())
    {
        requestStream.Write(Encoding.UTF8.GetBytes(sampleContent), 0, contentLength);
    }
    using (HttpWebResponse resp = (HttpWebResponse)request.GetResponse())
    {

    }
}

您可能还会发现此博文有用: http://gauravmantri.com/2013/02/16/uploading-large-files-in-windows-azure-blob-storage-using-shared-access-signature-html-and-javascript/