Downloading an Archive Object

If you have any questions during the development, post them on the Issues page of GitHub. For details about parameters and usage of each API, see the API Reference.

Before you can download an Archive object, you must restore it. Archive objects can be restored in either of the following ways.

To extend the validity period of the Archive data restored, you can repeatedly restore the data, but you will be billed for each restoration. After a second restore, the validity period of Standard object copies will be prolonged, and you need to pay for storing these copies during the prolonged period.

You can call ObsClient.RestoreObject to restore Archive objects. The sample code is as follows:

// Initialize configuration parameters.
ObsConfig config = new ObsConfig();
config.Endpoint = "https://your-endpoint";
// Hard-coded or plaintext AK and SK are risky. For security purposes, encrypt your AK and SK before storing them in the configuration file or environment variables. In this example, the AK and SK are stored in environment variables. Before running the code in this example, configure environment variables AccessKeyID and SecretAccessKey.
// Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/intl/en-us/usermanual-ca/ca_01_0003.html.
string accessKey= Environment.GetEnvironmentVariable("AccessKeyID", EnvironmentVariableTarget.Machine);
string secretKey= Environment.GetEnvironmentVariable("SecretAccessKey", EnvironmentVariableTarget.Machine);
// Create an instance of ObsClient.
ObsClient client = new ObsClient(accessKey, secretKey, config);

try
{
    RestoreObjectRequest request = new RestoreObjectRequest();
    request.BucketName = "bucketname";
    request.ObjectKey = "objectname";
    request.Days = 5;
    request.Tier = RestoreTierEnum.Expedited;
    // This parameter is optional. By default, the latest object version is restored. You can set versionId to restore a specified object version.
    // request.VersionId = "versionId";
    RestoreObjectResponse response = client.RestoreObject(request);
    Console.WriteLine("Restore object response: {0}", response.StatusCode);
}
catch (ObsException ex)
{
   Console.WriteLine("ErrorCode: {0}", ex.ErrorCode);
   Console.WriteLine("ErrorMessage: {0}", ex.ErrorMessage);
}

• The object specified in ObsClient.RestoreObject must be in the OBS Archive storage class. Otherwise, an exception will be thrown when you call this API.
• RestoreObjectRequest.Days specifies the retention period (1 to 30 days) of the restored object.
• RestoreObjectRequest.Tier specifies the restore option, which indicates the time spent on restoring an object.