问题描述

用存储的REST调用也是401错误~~

我按照教程使用REST调用BLOB的内容，也遇到的是401错误，这是什么情况？还有人也遇到了吗？

解决方案

您好，
请问您使用的是REST中的哪一个方法？据我所知，如果使用REST去调用blob中内容是，复杂的地方主要是在构造签名，首先我建议您先阅读下这篇文档：
https://msdn.microsoft.com/zh-cn/library/azure/dd179428.aspx
例如该方法：

 public void PutBlob(String containerName, String blobName)

{

    String requestMethod = "PUT";

    String urlPath = String.Format("{0}/{1}", containerName, blobName);

    String storageServiceVersion = "2012-02-12";

    String dateInRfc1123Format = DateTime.UtcNow.ToString("R", CultureInfo.InvariantCulture);

    String content = "Andrew Carnegie was born in Dunfermline";

    UTF8Encoding utf8Encoding = new UTF8Encoding();

    Byte[] blobContent = utf8Encoding.GetBytes(content);

    Int32 blobLength = blobContent.Length;

    const String blobType = "BlockBlob";

    String canonicalizedHeaders = String.Format(

            "x-ms-blob-type:{0}nx-ms-date:{1}nx-ms-version:{2}",

            blobType,

            dateInRfc1123Format,

            storageServiceVersion);

    String canonicalizedResource = String.Format("/{0}/{1}", AzureStorageConstants.Account, urlPath);

    String stringToSign = String.Format(

            "{0}nnn{1}nnnnnnnnn{2}n{3}",

            requestMethod,

            blobLength,

            canonicalizedHeaders,

            canonicalizedResource);

    String authorizationHeader = Utility.CreateAuthorizationHeader(stringToSign);

    Uri uri = new Uri(AzureStorageConstants.BlobEndPoint + urlPath);

    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);

    request.Method = requestMethod;

    request.Headers.Add("x-ms-blob-typeobType);

    request.Headers.Add("x-ms-dateteInRfc1123Format);

    request.Headers.Add("x-ms-versionorageServiceVersion);

    request.Headers.Add("AuthorizationthorizationHeader);

    request.ContentLength = blobLength;

    using (Stream requestStream = request.GetRequestStream())

    {

        requestStream.Write(blobContent, 0, blobLength);

    }

    using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())

    {

        String ETag = response.Headers["ETag"];

    }

}

我们需要构造出shared key，同时注意header中的各个信息。
处理rest问题和调试rest错误时，我个人建议您可以使用fiddler去troubleshoot您的reqest请求，去解决问题。
同时，建议您参考这个博客：https://convective.wordpress.com/2010/08/18/examples-of-the-windows-azure-storage-services-rest-api/
Regards,
Will
如果您想进一步了解Windows Azure, Windows Azure 官网欢迎您的访问