Obtaining an Object Version

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.

You can call ObsClient.GetObject to obtain an object version by specifying the version ID (VersionId).

This example downloads object objectname from bucket bucketname by specifying VersionId.

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);
// Obtain an object version.
try
{
    GetObjectRequest getObjectRequest = new GetObjectRequest()
    {
        BucketName = "bucketname",
        ObjectKey = "objectname",
        VersionId = "versionId",
    };
    using (GetObjectResponse response = client.GetObject(getObjectRequest))
    {
        Console.WriteLine("Get object response: {0}", response.StatusCode);
        //Save the file locally.
        if (!File.Exists("savePath"))
        {
            response.WriteResponseStreamToFile("savePath");
        }
    }
}
catch (ObsException ex)
{
    Console.WriteLine("ErrorCode: {0}", ex.ErrorCode);
    Console.WriteLine("ErrorMessage: {0}", ex.ErrorMessage);
}

• If the version ID is not specified, the object of the latest version will be downloaded by default.