Windows Azure - Blob Storage Initialization - Authorization Error

Question

Background :

I have an Azure application with one web role, which is an ASP.NET (C #) application that uses a charting application to display calculation results. A charting application requires input of an XML file. To access this XML file (JavaScript link), I use XDocument and its related classes to manage the file, and then save it, the chart control is loaded when the page is refreshed.

The error is :

When I try to work (GetPermissions, Create, Create, if it does not exist, etc.) in the container , I get the following error:

The server failed to authenticate the request. Verify that the authorization header value is configured correctly, including the signature.

I also tried to create the container in advance using SpaceBlock, this did not seem to change the result.

Code :

Here is the function that I call on the_Load page. The error occurs in bold (GetPermissions):

    private void InitializeStorage()
    {
        if (storageInitialized)
        {
            return;
        }

        lock (gate)
        {
            if (storageInitialized)
            {
                return;
            }

            try
            {
                CloudStorageAccount.SetConfigurationSettingPublisher((configName, configSetter) =>
                {
                    configSetter(RoleEnvironment.GetConfigurationSettingValue(configName));
                });

                // read account configuration settings
                var storageAccount = CloudStorageAccount.FromConfigurationSetting("DataConnectionString");

                // create blob container for images
                blobStorage = storageAccount.CreateCloudBlobClient();
                CloudBlobContainer container = blobStorage.GetContainerReference("xml");

                // configure container for public access
                **var permissions = container.GetPermissions();**
                permissions.PublicAccess = BlobContainerPublicAccessType.Container;
                container.SetPermissions(permissions);

                CloudBlob opcBlob = container.GetBlobReference("OptionPriceChart.xml");
                opcBlob.DownloadToFile("opcLocal.xml");

            }
            catch (WebException)
            {
                throw new WebException("Storage services initialization failure. "
                    + "Check your storage account configuration settings. If running locally, "
                    + "ensure that the Development Storage service is running.");
            }

            storageInitialized = true;
        }
    }

Answer 1

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