来自C＃的Azure BLOB存储REST调用

Question

我正在尝试通过控制台应用程序与Azure Blob存储上的容器通信。我无法使用SDK，因此REST是我唯一的选择。使用.NET 4.5.2的语言是C＃。

我试过这两个代码，都返回相同的错误

Azure Rest API将Blob放在StackOverflow上

Azure Blob存储第5部分（非堆栈溢出）

我收到的错误是400 Bad Request

还有其他人遇到过同样的问题并成功解决了吗？

我为几乎所有内容都添加了带有（*）的CORS规则

该代码是两个链接的完全重复，因此我不在这里添加它。

    class Program
   {
    static void Main(string[] args)
    {

        UploadBlobWithRestAPI();
    }

    public static void UploadBlobWithRestAPI()
    {

        string storageKey = "ffFJwPXTqyYvRoubNQEti/aQUUMwn41BG3KDtl/yGpG4DR1eKaHRq6Bhbw==";
        string storageAccount = "xyz";
        string containerName = "notes";
        string blobName = "test567";

        string method = "PUT";
        string sampleContent = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nulla id euismod urna. Maecenas scelerisque dolor purus, sed ullamcorper ipsum lobortis non. Nulla est justo, sodales at venenatis a, faucibus";
        int contentLength = Encoding.UTF8.GetByteCount(sampleContent);

        string requestUri = $"https://xyz.blob.core.windows.net/notes/test567";

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

        string now = DateTime.UtcNow.ToString("R");

        request.Method = method;
        request.ContentType = "text/plain; charset=UTF-8";
        request.ContentLength = contentLength;

        request.Headers.Add("x-ms-version", "2018-01-11");
        request.Headers.Add("x-ms-date", now);
        request.Headers.Add("x-ms-blob-type", "BlockBlob");
        request.Headers.Add("Authorization", AuthorizationHeader2(method, now, request, storageAccount, storageKey, containerName, blobName));

        using (Stream requestStream = request.GetRequestStream())
        {
            requestStream.Write(Encoding.UTF8.GetBytes(sampleContent), 0, contentLength);
        }

        using (HttpWebResponse resp = (HttpWebResponse)request.GetResponse())
        {
            Console.WriteLine(resp.StatusCode.ToString());
            Console.ReadKey();
        }

    }

    public static string AuthorizationHeader2(string method, string now, HttpWebRequest request, string storageAccount, 
        string storageKey, string containerName, string blobName)
    {

        string headerResource = $"x-ms-blob-type:BlockBlob\nx-ms-date:"+ DateTime.UtcNow.ToString("R") +"\nx-ms-version:2018-01-11";
        string urlResource = "/xyz/notes/test567";
        string stringToSign =  method + "\n\n\n" + request.ContentLength + 
            "\n\n" + request.ContentType +"\n\n\n\n\n\n\n" + headerResource + "\n" + urlResource;


        HMACSHA256 hmac = new HMACSHA256(Convert.FromBase64String(storageKey));
        string signature = Convert.ToBase64String(hmac.ComputeHash(Encoding.UTF8.GetBytes(stringToSign)));

        String AuthorizationHeader = String.Format("{0} {1}:{2}", "SharedKey", storageAccount, signature);
        return AuthorizationHeader;
    }


}

Answer 1

您的代码有两个问题：

1. 您使用的服务版本无效。2017-04-17并非最新的Storage Service REST API版本2018-01-11。更改后，将不会出现400错误（但会出现403错误）。

2. 在中headerResource，您将生成一个新的日期/时间值，该值将与x-ms-date标题中的日期/时间值不同。因此，您将得到403错误。因此，基本上您的代码将是：

       string headerResource = $"x-ms-blob-type:BlockBlob\nx-ms-date:" + now + "\nx-ms-version:2017-04-17";
   

我做了这两个修复，之后就可以上传数据了。

这是完整的代码：

    public static void UploadBlobWithRestAPI()
    {

        string storageKey = "ffFJwPXTqyYvRoubNQEti/aQUUMwn41BG3KDtl/yGpG4DR1eKaHRq6Bhbw==";
        string storageAccount = "xyz";
        string containerName = "notes";
        string blobName = "test567";

        string method = "PUT";
        string sampleContent = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nulla id euismod urna. Maecenas scelerisque dolor purus, sed ullamcorper ipsum lobortis non. Nulla est justo, sodales at venenatis a, faucibus";
        int contentLength = Encoding.UTF8.GetByteCount(sampleContent);

        string requestUri = $"https://xyz.blob.core.windows.net/notes/test567";

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

        string now = DateTime.UtcNow.ToString("R");

        request.Method = method;
        request.ContentType = "text/plain; charset=UTF-8";
        request.ContentLength = contentLength;

        request.Headers.Add("x-ms-version", "2017-04-17");
        request.Headers.Add("x-ms-date", now);
        request.Headers.Add("x-ms-blob-type", "BlockBlob");
        request.Headers.Add("Authorization", AuthorizationHeader2(method, now, request, storageAccount, storageKey, containerName, blobName));

        using (Stream requestStream = request.GetRequestStream())
        {
            requestStream.Write(Encoding.UTF8.GetBytes(sampleContent), 0, contentLength);
        }

        using (HttpWebResponse resp = (HttpWebResponse)request.GetResponse())
        {
            Console.WriteLine(resp.StatusCode.ToString());
            Console.ReadKey();
        }

    }

    public static string AuthorizationHeader2(string method, string now, HttpWebRequest request, string storageAccount,
        string storageKey, string containerName, string blobName)
    {

        string headerResource = $"x-ms-blob-type:BlockBlob\nx-ms-date:" + now + "\nx-ms-version:2017-04-17";
        string urlResource = "/xyz/notes/test567";
        string stringToSign = method + "\n\n\n" + request.ContentLength +
            "\n\n" + request.ContentType + "\n\n\n\n\n\n\n" + headerResource + "\n" + urlResource;


        HMACSHA256 hmac = new HMACSHA256(Convert.FromBase64String(storageKey));
        string signature = Convert.ToBase64String(hmac.ComputeHash(Encoding.UTF8.GetBytes(stringToSign)));

        String AuthorizationHeader = String.Format("{0} {1}:{2}", "SharedKey", storageAccount, signature);
        return AuthorizationHeader;
    }