private async Task <CloudBlobContainer> CreateCloudBlobContainer(
DataProtectionAzureStorageOptions options,
CloudStorageAccount cloudStorageAccount,
CancellationToken cancellationToken = default)
{
var sw = Stopwatch.StartNew();
var cloudBlobClient = cloudStorageAccount.CreateCloudBlobClient();
var cloudBlobContainer = cloudBlobClient.GetContainerReference(options.ContainerName);
var created = await cloudBlobContainer.CreateIfNotExistsAsync(cancellationToken);
if (created)
{
_logger?.LogInformation(" - No Azure Blob [{containerName}] found - so one was auto created.", options.ContainerName);
}
else
{
_logger?.LogInformation(" - Using existing Azure Blob [{containerName}] [{blobName}].", options.ContainerName, options.KeyBlobName);
}
sw.Stop();
_logger?.LogInformation(" - {nameOf} ran for {seconds} sc", nameof(CreateCloudBlobContainer), sw.Elapsed.TotalSeconds);
return(cloudBlobContainer);
}
private async Task <CloudBlobContainer> CreateCloudBlobContainer(
DataProtectionAzureStorageOptions options,
CloudStorageAccount cloudStorageAccount,
CancellationToken cancellationToken = default)
{
var sw = ValueStopwatch.StartNew();
var cloudBlobClient = cloudStorageAccount.CreateCloudBlobClient();
var cloudBlobContainer = cloudBlobClient.GetContainerReference(options.ContainerName);
#if NETSTANDARD2_1
var created = await cloudBlobContainer.CreateIfNotExistsAsync(cancellationToken);
#elif NETSTANDARD2_0
var created = await cloudBlobContainer.CreateIfNotExistsAsync();
#endif
if (created)
{
_logger.LogInformation("[Azure Blob][DataProtection] No Azure Blob [{blobName}] found - so one was auto created.", options.ContainerName);
}
else
{
_logger.LogInformation("[Azure Blob][DataProtection] Using existing Azure Blob:[{blobName}].", options.ContainerName);
}
_logger.LogInformation("[Azure Blob][DataProtection] Completed: {methodName}; Elapsed: {elapsed}sec", nameof(CreateCloudBlobContainer), sw.GetElapsedTime().TotalSeconds);
return(cloudBlobContainer);
}
private async Task <CloudStorageAccount> GetStorageAccountAsync(
DataProtectionAzureStorageOptions options,
CancellationToken cancellationToken = default)
{
CloudStorageAccount account;
if (!string.IsNullOrEmpty(options.ConnectionString) &&
CloudStorageAccount.TryParse(options.ConnectionString, out var cloudStorageAccount))
{
account = cloudStorageAccount;
_logger.LogInformation("Azure Storage Authentication with ConnectionString.");
}
else if (!string.IsNullOrEmpty(options.Name) &&
string.IsNullOrEmpty(options.Token))
{
// Get the initial access token and the interval at which to refresh it.
var azureServiceTokenProvider = options.TokenProvider;
var tokenAndFrequency = await TokenRenewerAsync(
azureServiceTokenProvider,
cancellationToken);
// Create storage credentials using the initial token, and connect the callback function
// to renew the token just before it expires
#pragma warning disable CA2000 // Dispose objects before losing scope
var tokenCredential = new TokenCredential(
tokenAndFrequency.Token,
TokenRenewerAsync,
azureServiceTokenProvider,
#pragma warning disable CS8629 // Nullable value type may be null.
tokenAndFrequency.Frequency.Value);
#pragma warning restore CS8629 // Nullable value type may be null.
#pragma warning restore CA2000 // Dispose objects before losing scope
var storageCredentials = new StorageCredentials(tokenCredential);
account = new CloudStorageAccount(storageCredentials, options.Name, string.Empty, true);
_logger.LogInformation("Azure Storage Authentication with MSI Token.");
}
else if (!string.IsNullOrEmpty(options.Name) &&
!string.IsNullOrEmpty(options.Token))
{
account = new CloudStorageAccount(new StorageCredentials(options.Token), options.Name, true);
_logger.LogInformation("Azure Storage Authentication with SAS Token.");
}
else
{
throw new ArgumentException($"One of the following must be set: '{options.ConnectionString}' or '{options.Name}'!");
}
return(account);
}
