Question

我正在尝试使用WebClient将新blob上传到Azure存储计数器，如下所示：

var sas = "[a new generated sas with Read, Write, List & Delete permissions]";
var sData = "This is a test!";
var sEndPoint = "http://myaccount.blob.core.windows.net/mycontainer/MyTest.txt" + sas;

var clt = new WebClient();
var res = await clt.UploadStringTaskAsync(sEndPoint, "PUT", sData);

这给了我一个“（400）错误请求”。错误。我在这里做错了吗？

由于

（顺便说一句，我需要使用REST而不是Client API，因为我在Silverlight项目中）

Answer 1

您需要为blob类型定义请求标头（x-ms-blob-type）并将其值设置为BlockBlob。此外，对于Put请求，您还需要定义Content-Length请求标头。我写了一篇关于共享访问签名的博客文章，并使用它（包括REST API和存储客户端库）执行一些blob操作，您可以在这里阅读：http://gauravmantri.com/2013/02/13/revisiting-windows-azure-shared-access-signature/。

这里是关于上传blob的帖子的代码。它使用HttpWebRequest / HttpWebResponse而不是WebClient：

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.Substring(0, blobContainerSasUri.Length - queryString.Length);
    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())
    {

    }
}

Answer 2

在针对blob模拟器进行测试时，这是我需要的代码：

        var connection = ConfigurationManager.AppSettings["AzureStorageConnectionString"];
        var storageAccount = CloudStorageAccount.Parse(connection);

        var client = new WebClient();
        client.Headers.Add("x-ms-blob-type", "BlockBlob");
        client.Headers.Add("x-ms-version", "2012-02-12");
        client.UploadData(string.Format(@"{0}/$root/{1}{2}", storageAccount.BlobEndpoint, myFileName, sharedAccessSignature), "PUT", _content);

Azure REST WebClient PUT Blob

2 个答案: