private static async Task ValidateCredentialsAsyncCore()

in src/Microsoft.Azure.WebJobs.Host.Storage/DefaultStorageCredentialsValidator.cs [27:81]
44 lines of code
7 McCabe index (conditional complexity)

        private static async Task ValidateCredentialsAsyncCore(IStorageAccount account, CancellationToken cancellationToken)
        {
            // Verify the credentials are correct.
            // Have to actually ping a storage operation.
            IStorageBlobClient client = account.CreateBlobClient();

            try
            {
                // This can hang for a long time if the account name is wrong. 
                // If will fail fast if the password is incorrect.
                await client.GetServicePropertiesAsync(cancellationToken);
            }
            catch (OperationCanceledException)
            {
                throw;
            }
            catch (Exception e)
            {
                var storageException = e as StorageException;
                var isDevStoreAccount = GetIsDevStoreAccountFromCloudStorageAccount(account.SdkObject);

                if (storageException?.RequestInformation?.HttpStatusCode == 400 &&
                    storageException?.RequestInformation?.ExtendedErrorInformation?.ErrorCode == "InvalidQueryParameterValue")
                {
                    // Premium storage accounts do not support the GetServicePropertiesAsync call, and respond with a 400 'InvalidQueryParameterValue'.
                    // If we see this error response classify the account as a premium account
                    account.Type = StorageAccountType.Premium;
                    return;
                }
                else if (isDevStoreAccount)
                {
                    // If using the storage emulator, it might not be running
                    throw new InvalidOperationException(Constants.CheckAzureStorageEmulatorMessage, e);
                }
                else
                {
                    // If not a recognized error, the credentials are invalid
                    string message = String.Format(CultureInfo.CurrentCulture,
                        "Invalid storage account '{0}'. Please make sure your credentials are correct.",
                        account.Credentials.AccountName);
                    throw new InvalidOperationException(message, e);
                }
            }

            IStorageQueueClient queueClient = account.CreateQueueClient();
            IStorageQueue queue = queueClient.GetQueueReference("name");
            try
            {
                await queue.ExistsAsync(cancellationToken);
            }
            catch (StorageException exception) when (IsBlobOnlyStorageException(exception))
            {
                account.Type = StorageAccountType.BlobOnly;
            }
        }