Help Center/ Object Storage Service/ SDK Reference/ .NET/ Lifecycle Management/ Setting Lifecycle Rules
Updated on 2024-05-08 GMT+08:00
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Setting Lifecycle Rules

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.SetBucketLifecycle to set lifecycle rules.

Setting an Object Transition Policy

Sample code: 
// Initialize configuration parameters.
ObsConfig config = new ObsConfig();
config.Endpoint = "https://your-endpoint";
// Hard-coded or plaintext AK/SK are risky. For security purposes, encrypt your AK/SK and store them in the configuration file or environment variables. In this example, the AK/SK are stored in environment variables for identity authentication. Before running 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);
//Set an object transition policy.
try
{
    SetBucketLifecycleRequest request = new SetBucketLifecycleRequest();
    request.BucketName = "bucketname";
    request.Configuration = new LifecycleConfiguration();
    LifecycleRule rule1 = new LifecycleRule();
    rule1.Id = "rule1";
    rule1.Prefix = "prefix";
    rule1.Status = RuleStatusEnum.Enabled;
    Transition transition = new Transition();
    rule1.Transitions.Add(transition);     
    // Specify that objects whose names contain the specified prefix will be transitioned 30 days after creation.
    transition.Days = 30;
    // Specify the storage class that the object will be transitioned to.
    transition.StorageClass = StorageClassEnum.Warm;
    NoncurrentVersionTransition noncurrentVersionTransition  = new NoncurrentVersionTransition();
    rule1.NoncurrentVersionTransitions.Add(noncurrentVersionTransition);
    // Specify that objects whose names contain the specified prefix will be transitioned 60 days after becoming noncurrent versions.
    noncurrentVersionTransition.NoncurrentDays = 60;
    // Specify the storage class that a noncurrent version will be transitioned to.
    noncurrentVersionTransition.StorageClass = StorageClassEnum.Warm;
    request.Configuration.Rules.Add(rule1);
    SetBucketLifecycleResponse response = client.SetBucketLifecycle(request);
    Console.WriteLine("Set bucket lifecycle response: {0}", response.StatusCode);
}
catch (ObsException ex)
{
    Console.WriteLine("ErrorCode: {0}", ex.ErrorCode);
    Console.WriteLine("ErrorMessage: {0}", ex.ErrorMessage);
}

Setting an Object Expiration Time

Sample code:

// Initialize configuration parameters.
ObsConfig config = new ObsConfig();
config.Endpoint = "https://your-endpoint";
// Hard-coded or plaintext AK/SK are risky. For security purposes, encrypt your AK/SK and store them in the configuration file or environment variables. In this example, the AK/SK are stored in environment variables for identity authentication. Before running 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);
// Set the object expiration time.
try
{
    SetBucketLifecycleRequest request = new SetBucketLifecycleRequest();
    request.BucketName = "bucketname";
    request.Configuration = new LifecycleConfiguration();
    LifecycleRule rule1 = new LifecycleRule();
    rule1.Id = "rule1";
    rule1.Prefix = "prefix";
    rule1.Status = RuleStatusEnum.Enabled;
    rule1.Expiration = new Expiration();
    //Specify that objects whose names contain the prefix will expire 60 days after creation.
    rule1.Expiration.Days = 60;
    // Specify that objects whose names contain the prefix will expire 60 days after becoming noncurrent versions.
    rule1.NoncurrentVersionExpiration = new NoncurrentVersionExpiration();
    rule1.NoncurrentVersionExpiration.NoncurrentDays = 60;
    request.Configuration.Rules.Add(rule1);
    SetBucketLifecycleResponse response = client.SetBucketLifecycle(request);
    Console.WriteLine("Set bucket lifecycle response: {0}", response.StatusCode);
}
catch (ObsException ex)
{
    Console.WriteLine("ErrorCode: {0}", ex.ErrorCode);
    Console.WriteLine("ErrorMessage: {0}", ex.ErrorMessage);
}
  • Each time you call this API to configure a lifecycle rule, the lifecycle rules you previously configured will be overwritten.
Parent topic: Lifecycle Management