How to manage versioning with OSS SDK for C# 1.0 - Object Storage Service

Le versioning s'applique à tous les objets d'un bucket. Il vous permet de restaurer une version antérieure d'un objet en cas d'écrasement ou de suppression accidentelle.

Un bucket peut se trouver dans l'un des états de versioning suivants : désactivé (par défaut), activé ou suspendu. Pour plus d'informations sur le versioning, consultez la rubrique Versioning.

Notes

Cette rubrique utilise le point de terminaison public de la région Chine (Hangzhou). Si vous souhaitez accéder à OSS depuis d'autres services Alibaba Cloud situés dans la même région, utilisez un point de terminaison interne. Pour plus d'informations sur les régions et les points de terminaison OSS, consultez la rubrique Regions and endpoints.
Cette rubrique explique comment créer une instance OSSClient avec un endpoint OSS. Pour découvrir d'autres configurations, telles que l'utilisation d'un domaine personnalisé ou l'authentification via des identifiants du Security Token Service (STS), consultez la rubrique Initialization (C# SDK V1).
Pour définir l'état de versioning d'un bucket, vous devez disposer de l'autorisation oss:PutBucketVersioning. Pour récupérer les informations relatives à l'état de versioning d'un bucket, vous devez disposer de l'autorisation oss:GetBucketVersioning. Pour plus d'informations, consultez la rubrique Grant a custom access policy to a RAM user.

Configure versioning for a bucket

L'extrait de code suivant montre comment activer ou suspendre le versioning pour un bucket.

using Aliyun.OSS;
using Aliyun.OSS.Common;

// Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. 
var endpoint = "yourEndpoint";
// Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. 
var accessKeyId = Environment.GetEnvironmentVariable("OSS_ACCESS_KEY_ID");
var accessKeySecret = Environment.GetEnvironmentVariable("OSS_ACCESS_KEY_SECRET");
// Specify the name of the bucket. Example: examplebucket. 
var bucketName = "examplebucket";
// Specify the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou.
const string region = "cn-hangzhou";

// Create a ClientConfiguration instance and modify parameters as required.
var conf = new ClientConfiguration();

// Use the signature algorithm V4.
conf.SignatureVersion = SignatureVersion.V4;

// Create an OSSClient instance.
var client = new OssClient(endpoint, accessKeyId, accessKeySecret, conf);
client.SetRegion(region);
try
{
    // Set the versioning status of the bucket to Enabled. 
    client.SetBucketVersioning(new SetBucketVersioningRequest(bucketName, VersioningStatus.Enabled));
    Console.WriteLine("Create bucket Version succeeded");
}
catch (Exception ex)
{
    Console.WriteLine("Create bucket Version failed. {0}", ex.Message);
}

Query the versioning status of a bucket

L'extrait de code suivant montre comment récupérer l'état de versioning d'un bucket.

using Aliyun.OSS;
using Aliyun.OSS.Common;
// Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. 
var endpoint = "yourEndpoint";
// Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. 
var accessKeyId = Environment.GetEnvironmentVariable("OSS_ACCESS_KEY_ID");
var accessKeySecret = Environment.GetEnvironmentVariable("OSS_ACCESS_KEY_SECRET");
// Specify the name of the bucket. Example: examplebucket. 
var bucketName = "examplebucket";
// Specify the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou.
const string region = "cn-hangzhou";
            
// Create a ClientConfiguration instance and modify parameters as required.
var conf = new ClientConfiguration();
            
// Use the signature algorithm V4.
conf.SignatureVersion = SignatureVersion.V4;
            
// Create an OSSClient instance.
var client = new OssClient(endpoint, accessKeyId, accessKeySecret, conf);
client.SetRegion(region);
try
{
    // Query the versioning status of the bucket. 
    var result = client.GetBucketVersioning(bucketName);
    Console.WriteLine("Get bucket:{0} Version succeeded ", bucketName);

    Console.WriteLine("bucket version status: {0}", result.Status);
}
catch (OssException ex)
{
    Console.WriteLine("Failed with error code: {0}; Error info: {1}. \nRequestID:{2}\tHostID:{3}",
        ex.ErrorCode, ex.Message, ex.RequestId, ex.HostId);
}
catch (Exception ex)
{
    Console.WriteLine("Failed with error info: {0}", ex.Message);
}

List the versions of all objects in a bucket

L'extrait de code suivant montre comment répertorier toutes les versions d'objets, y compris les marqueurs de suppression, dans un bucket spécifié.

using Aliyun.OSS;
using Aliyun.OSS.Common;
// Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. 
var endpoint = "yourEndpoint";
// Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. 
var accessKeyId = Environment.GetEnvironmentVariable("OSS_ACCESS_KEY_ID");
var accessKeySecret = Environment.GetEnvironmentVariable("OSS_ACCESS_KEY_SECRET");
// Specify the name of the bucket. Example: examplebucket. 
var bucketName = "examplebucket";
// Specify the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou.
const string region = "cn-hangzhou";
            
// Create a ClientConfiguration instance and modify parameters as required.
var conf = new ClientConfiguration();
            
// Use the signature algorithm V4.
conf.SignatureVersion = SignatureVersion.V4;
            
// Create an OSSClient instance.
var client = new OssClient(endpoint, accessKeyId, accessKeySecret, conf);
client.SetRegion(region);
try
{   
    ObjectVersionList result = null;
    var request = new ListObjectVersionsRequest(bucketName);
    do {        
        result = client.ListObjectVersions(request);
        Console.WriteLine("ListObjectVersions succeeded");
        // View the versions of all listed objects. 
        foreach (var objectversion in result.ObjectVersionSummaries)
        {
            Console.WriteLine("objectversion key: {0}; objectversion versionid: {1}", objectversion.Key, objectversion.VersionId);
        }
        // View the versions of all listed delete markers. 
        foreach (var deletemarker in result.DeleteMarkerSummaries)
        {
            Console.WriteLine("deletemarker key: {0}; deletemarker versionid: {1}", deletemarker.Key, deletemarker.VersionId);
        }
        request.KeyMarker = result.NextKeyMarker;
        request.NextVersionIdMarker = result.NextVersionIdMarker;
    } while (result.IsTruncated)
}
catch (OssException ex)
{
    Console.WriteLine("Failed with error code: {0}; Error info: {1}. \nRequestID:{2}\tHostID:{3}",
        ex.ErrorCode, ex.Message, ex.RequestId, ex.HostId);
}
catch (Exception ex)
{
    Console.WriteLine("Failed with error info: {0}", ex.Message);
}

References

Pour plus d'informations sur l'opération API permettant de configurer le versioning d'un bucket, consultez la rubrique PutBucketVersioning.
Pour plus d'informations sur l'opération API permettant de consulter l'état de versioning d'un bucket, consultez la rubrique GetBucketVersioning.