Object Storage Service:Versioning (OSS SDK for C# 1.0)

Observações

• Este tópico utiliza o endpoint público da região China (Hangzhou). Para acessar o OSS a partir de outros services da Alibaba Cloud na mesma região do OSS, use um endpoint interno. Para obter mais informações sobre as regiões e endpoints do OSS, consulte Regions and endpoints.

• Este tópico demonstra a criação de uma instância OSSClient com um endpoint do OSS. Para configurações alternativas, como o uso de um domínio personalizado ou a autenticação com credenciais do Security Token Service (STS), consulte Initialization (C# SDK V1).

• Para definir o estado de versionamento de um bucket, é necessário ter a permissão oss:PutBucketVersioning. Para recuperar informações sobre o estado de versionamento de um bucket, é necessário ter a permissão oss:GetBucketVersioning. Para obter mais informações, consulte Grant a custom access policy to a RAM user.

Configure o versionamento de um bucket

O código a seguir mostra como ativar ou suspender o versionamento de um 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);
}

Consulte o status de versionamento de um bucket

O código a seguir mostra como recuperar o estado de versionamento de um 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);
}

Liste as versões de todos os objetos em um bucket

O código a seguir mostra como listar todas as versões de objetos, incluindo marcadores de exclusão, em um bucket especificado.

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);
}

Referências

• Para obter mais informações sobre a operação de API usada para configurar o versionamento de um bucket, consulte PutBucketVersioning.

• Para obter mais informações sobre a operação de API usada para consultar o status de versionamento de um bucket, consulte GetBucketVersioning.