无法使用 Azure 的 REST 创建 Blob 容器 API

Question

我正在尝试使用 C# 和 REST API（在 Xamarin.Android 中）创建 Blob 容器。我可以将 blob 上传到现有容器，但我似乎无法通过 REST 创建容器。错误是 (403) 服务器无法验证请求。确保 Authorization header 的值正确形成，包括签名。 创建 Authorization Header 在上传 blob 时有效，所以它必须符合我构建的方式容器的字符串要签名，但对于我来说，我找不到问题所在。这是代码：

    private async Task<bool> CreateContainer(string containerName)
    {          
        String requestMethod = "PUT";
        String msVersion = "2009-09-19";
        string dt = DateTime.UtcNow.ToString("R", CultureInfo.InvariantCulture);

        String canonicalizedHeaders = String.Format("x-ms-date:{0}\nx-ms-version:{1}", dt, msVersion);
        String canonicalizedResource = String.Format("/{0}/{1}\nrestype:container", AzureStorageConstants.Account, containerName);
        String stringToSign = String.Format("{0}\n\n\n\n\n\n\n\n\n\n\n\n{1}\n{2}", requestMethod, canonicalizedHeaders, canonicalizedResource);

        string auth = SignThis(stringToSign);   
        string urlPath = string.Format("https://{0}.blob.core.windows.net/{1}?restype=container", AzureStorageConstants.Account, containerName);
        Uri uri = new Uri(urlPath);

        HttpClient client = new HttpClient();
        client.DefaultRequestHeaders.Add("x-ms-date", dt);
        client.DefaultRequestHeaders.Add("x-ms-version", "2009-09-19");
        client.DefaultRequestHeaders.Add("Authorization", auth);

        HttpContent empty = null;
        HttpResponseMessage response = await client.PutAsync(uri, empty);

        return response.IsSuccessStatusCode;
    }

    private static String SignThis(String StringToSign)
    {
        String signature = string.Empty;
        byte[] unicodeKey = Convert.FromBase64String(AzureStorageConstants.Key);
        using (HMACSHA256 hmacSha256 = new HMACSHA256(unicodeKey))
        {
            Byte[] dataToHmac = System.Text.Encoding.UTF8.GetBytes(StringToSign);
            signature = Convert.ToBase64String(hmacSha256.ComputeHash(dataToHmac));
        }

        String authorizationHeader = String.Format(
              CultureInfo.InvariantCulture,
              "{0} {1}:{2}",
              "SharedKey",
              AzureStorageConstants.Account,
              signature);

        return authorizationHeader;
    }

Answer 1

您的请求失败的原因是您没有在 stringToSign 中包含内容长度，即使它包含在请求中（HttpClient 包含它并将其值设置为 0).这导致签名不匹配。要解决此问题，请在 stringToSign:

中包含内容长度

String stringToSign = String.Format("{0}\n\n\n0\n\n\n\n\n\n\n\n\n{1}\n{2}", requestMethod, canonicalizedHeaders, canonicalizedResource);

无法使用 Azure 的 REST 创建 Blob 容器 API

Cannot create Blob Container with Azure's REST API

c#

rest

azure

xamarin

azure-blob-storage