Gerencie versionamento (C++ SDK) - Object Storage Service: Central de Documentação do Alibaba Cloud

O versionamento aplica-se a todos os objetos em um bucket.

Observações

Este tópico usa o endpoint público da região China (Hangzhou). Para acessar o OSS a partir de outros serviços da Alibaba Cloud na mesma região, use um endpoint interno. Para obter mais informações sobre regiões e endpoints do OSS, consulte Regiões e endpoints.
Os exemplos a seguir demonstram como criar uma instância OSSClient com um endpoint do OSS. Para configurações alternativas, como uso de domínio personalizado ou autenticação via Security Token Service (STS), consulte Criar uma instância OssClient.
Para definir o estado de versionamento de um bucket, você precisa da permissão oss:PutBucketVersioning. Para recuperar informações sobre esse estado, é necessária a permissão oss:GetBucketVersioning. Para obter mais informações, consulte Conceder uma política de acesso personalizada a um usuário RAM.

Defina o estado de versionamento de um bucket

O código a seguir mostra como ativar ou suspender o versionamento de um bucket.

#include <alibabacloud/oss/OssClient.h>
using namespace AlibabaCloud::OSS;

int main(void)
{
    /* Initialize OSS account information. */
            
    /* Set yourEndpoint to the endpoint of the region where the bucket is located. For example, if the bucket is in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. */
    std::string Endpoint = "yourEndpoint";
    /* Set yourRegion to the region where the bucket is located. For example, if the bucket is in the China (Hangzhou) region, set the region to cn-hangzhou. */
    std::string Region = "yourRegion";
    /* Specify the bucket name, for example, examplebucket. */
    std::string BucketName = "examplebucket";

    /* Initialize network resources. */
    InitializeSdk();

    ClientConfiguration conf;
    conf.signatureVersion = SignatureVersionType::V4;
    /* Obtain access credentials from environment variables. Before running this sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are set. */
    auto credentialsProvider = std::make_shared<EnvironmentVariableCredentialsProvider>();
    OssClient client(Endpoint, credentialsProvider, conf);
    client.SetRegion(Region);

    /* Create a bucket versioning configuration and set the status to Enabled or Suspended. */
    SetBucketVersioningRequest setrequest(BucketName, VersioningStatus::Enabled);
    auto outcome = client.SetBucketVersioning(setrequest);

    if (!outcome.isSuccess()) {
        /* Handle the exception. */
        std::cout << "SetBucketVersioning fail" <<
        ",code:" << outcome.error().Code() <<
        ",message:" << outcome.error().Message() <<
        ",requestId:" << outcome.error().RequestId() << std::endl;
        return -1;
    }

    /* Release network resources. */
    ShutdownSdk();
    return 0;
}

Visualize o estado de versionamento de um bucket

O código a seguir mostra como recuperar o estado de versionamento de um bucket.

#include <alibabacloud/oss/OssClient.h>
using namespace AlibabaCloud::OSS;

int main(void)
{
    /* Initialize OSS account information. */
            
    /* Set yourEndpoint to the endpoint of the region where the bucket is located. For example, if the bucket is in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. */
    std::string Endpoint = "yourEndpoint";
    /* Set yourRegion to the region where the bucket is located. For example, if the bucket is in the China (Hangzhou) region, set the region to cn-hangzhou. */
    std::string Region = "yourRegion";
    /* Specify the bucket name, for example, examplebucket. */
    std::string BucketName = "examplebucket";

    /* Initialize network resources. */
    InitializeSdk();

    ClientConfiguration conf;
    conf.signatureVersion = SignatureVersionType::V4;
    /* Obtain access credentials from environment variables. Before running this sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are set. */
    auto credentialsProvider = std::make_shared<EnvironmentVariableCredentialsProvider>();
    OssClient client(Endpoint, credentialsProvider, conf);
    client.SetRegion(Region);

    /* Get the versioning state of the bucket. */   
    auto outcome = client.GetBucketVersioning(GetBucketVersioningRequest(BucketName));

    if (!outcome.isSuccess()) {
        /* Handle the exception. */
        std::cout << "GetBucketVersioning fail" <<
        ",code:" << outcome.error().Code() <<
        ",message:" << outcome.error().Message() <<
        ",requestId:" << outcome.error().RequestId() << std::endl;
        return -1;
    }

    /* Release network resources. */
    ShutdownSdk();
    return 0;
}

Listar todas as versões de objetos em um bucket

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

#include <alibabacloud/oss/OssClient.h>

using namespace AlibabaCloud::OSS;

int main(void)
{
    /* Initialize OSS account information. */
            
    /* Set yourEndpoint to the endpoint of the region where the bucket is located. For example, if the bucket is in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. */
    std::string Endpoint = "yourEndpoint";
    /* Set yourRegion to the region where the bucket is located. For example, if the bucket is in the China (Hangzhou) region, set the region to cn-hangzhou. */
    std::string Region = "yourRegion";
    /* Specify the bucket name, for example, examplebucket. */
    std::string BucketName = "examplebucket";
    /* Specify the full path of the object. The full path cannot contain the bucket name. Example: exampledir/exampleobject.txt. */
    std::string ObjectName = "exampledir/exampleobject.txt";

    /* Initialize network resources. */
    InitializeSdk();

    ClientConfiguration conf;
    conf.signatureVersion = SignatureVersionType::V4;
    /* Obtain access credentials from environment variables. Before running this sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are set. */
    auto credentialsProvider = std::make_shared<EnvironmentVariableCredentialsProvider>();
    OssClient client(Endpoint, credentialsProvider, conf);
    client.SetRegion(Region);

    ListObjectVersionsRequest request(BucketName);
    bool IsTruncated = false;

    do {
            auto outcome = client.ListObjectVersions(request);

            if (outcome.isSuccess()) {
                /* View the version information of the listed object delete markers. */
                for (auto const &marker : outcome.result().DeleteMarkerSummarys()) {
                   std::cout << "marker key:" << marker.Key() << ",marker versionid:" << marker.VersionId() << std::endl;
                }

                /* View the version information of the listed objects. */
                for (auto const &obj : outcome.result().ObjectVersionSummarys()) {
                     std::cout << "object key:" << obj.Key() << ",object versionid:" << obj.VersionId() << std::endl;
                }
            }
            else {
                std::cout << "ListObjectVersions fail" <<
                ",code:" << outcome.error().Code() <<
                ",message:" << outcome.error().Message() <<
                ",requestId:" << outcome.error().RequestId() << std::endl;
                break;
            }
            request.setKeyMarker(outcome.result().NextKeyMarker());
            request.setVersionIdMarker(outcome.result().NextVersionIdMarker());
            IsTruncated = outcome.result().IsTruncated();
    } while (IsTruncated);

    /* Release network resources. */
    ShutdownSdk();
    return 0;
}

Referências

Para obter informações sobre a operação de API que define o estado de versionamento de um bucket, consulte PutBucketVersioning.
Para obter informações sobre a operação de API que recupera o estado de versionamento de um bucket, consulte GetBucketVersioning.