Control de versiones (OSS SDK for C# 1.0) - Object Storage Service

El control de versiones se aplica a todos los objetos de un bucket y permite recuperarlos en una versión anterior si se sobrescriben o eliminan por accidente.

Un bucket puede encontrarse en uno de los siguientes estados de control de versiones: deshabilitado (predeterminado), habilitado o suspendido. Para obtener más información sobre el control de versiones, consulte Versioning.

Notas

En este tema se utiliza el endpoint público de la región China (Hangzhou). Si necesita acceder a OSS desde otros servicios de Alibaba Cloud ubicados en la misma región que OSS, utilice un endpoint interno. Para obtener más información sobre las regiones y los endpoints de OSS, consulte Regions and endpoints.
Este tema muestra cómo crear una instancia de OSSClient con un endpoint de OSS. Para conocer configuraciones alternativas, como usar un dominio personalizado o autenticarse con credenciales de Security Token Service (STS), consulte Initialization (C# SDK V1).
Para establecer el estado de control de versiones de un bucket, es obligatorio contar con el permiso oss:PutBucketVersioning. Para obtener información sobre dicho estado, requiere el permiso oss:GetBucketVersioning. Para obtener más información, consulte Grant a custom access policy to a RAM user.

Configurar el control de versiones de un bucket

A continuación se muestra cómo habilitar o suspender el control de versiones de 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);
}

Consultar el estado de control de versiones de un bucket

A continuación se muestra cómo obtener el estado de control de versiones de 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);
}

Listar las versiones de todos los objetos de un bucket

A continuación se muestra cómo listar todas las versiones de los objetos de un bucket específico, incluidos los marcadores de eliminación.

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);
}

Referencias

Para obtener más información sobre la operación de API que permite configurar el control de versiones de un bucket, consulte PutBucketVersioning.
Si necesita consultar el estado de control de versiones de un bucket mediante una operación de API, consulte GetBucketVersioning.