删除文件_版本控制_C++_SDK 示例_对象存储 OSS-阿里云

删除单个文件

对于开启版本控制的Bucket执行DeleteObject操作时，如果未指定versionId，则保留Object的当前版本，并插入删除标记（Delete Marker）。如果指定versionId，则永久删除该指定版本ID的Object。

说明

未指定versionId：
如果在未指定versionId的情况下执行DeleteObject操作时，默认仅作用于Object的当前版本，但不会直接删除该Object的当前版本，而是插入一个删除标记（Delete Marker），并保留原来的当前版本。当执行GetObject操作时，OSS会检测到当前版本为删除标记，并返回404 Not Found。此外，响应中会返回header：x-oss-delete-marker = true以及新生成的删除标记的版本号x-oss-version-id。

x-oss-delete-marker的值为true，表示与返回的x-oss-version-id对应的版本为删除标记。
指定versionId：
如果在指定versionId的情况下调用DeleteObject接口时，OSS会根据params参数中指定的versionId参数永久删除该版本。如果要删除ID为“null”的版本，则调用DeleteObject接口时，在params参数中添加 params['versionId'] =“null”，OSS将“null”字符串当成“null”版本的ID号，从而删除版本ID为“null”的Object。

以下提供了永久删除指定版本Object及临时删除Object的示例：

指定versionId永久删除Object

以下代码用于永久删除指定版本的Object：

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

int main(void)
{
    /*初始化OSS账号信息*/
    std::string AccessKeyId = "yourAccessKeyId";
    std::string AccessKeySecret = "yourAccessKeySecret";
    std::string Endpoint = "yourEndpoint";
    std::string BucketName = "yourBucketName";
    std::string ObjectName = "yourObjectName";

    /* 初始化网络等资源 */
    InitializeSdk();

    ClientConfiguration conf;
    OssClient client(Endpoint, AccessKeyId, AccessKeySecret, conf);

    /* 删除指定版本id的object或删除指定删除标记版本id的object */
    auto outcome = client.DeleteObject(BucketName, ObjectName, "yourObjectVersionIdOrDeleteMarkerVersionId");
    /* 如果指定的是object的版本id，则返回的delete_marker为None且返回的versionid为前面指定的object版本id */
    /* 如果指定的是删除标记的版本id，则返回的delete_marker为True且返回的versionid为前面指定的删除标记的版本id */
    if (!outcome.isSuccess()) {
        /* 异常处理 */
        std::cout << "DeleteObject fail" <<
        ",code:" << outcome.error().Code() <<
        ",message:" << outcome.error().Message() <<
        ",requestId:" << outcome.error().RequestId() << std::endl;
        ShutdownSdk();
        return -1;
    }

    /* 释放网络等资源 */
    ShutdownSdk();
    return 0;
}

不指定versionId临时删除Object

以下代码用于临时删除Object：

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

int main(void)
{
    /*初始化OSS账号信息*/
    std::string AccessKeyId = "yourAccessKeyId";
    std::string AccessKeySecret = "yourAccessKeySecret";
    std::string Endpoint = "yourEndpoint";
    std::string BucketName = "yourBucketName";
    std::string ObjectName = "yourObjectName";

    /* 初始化网络等资源 */
    InitializeSdk();

    ClientConfiguration conf;
    OssClient client(Endpoint, AccessKeyId, AccessKeySecret, conf);

    DeleteObjectRequest request(BucketName, ObjectName);

    /* 不指定版本id删除object */
    auto outcome = client.DeleteObject(request);
    /* 查看返回删除标记的版本id */
    if (outcome.isSuccess()) {
        std::cout << "versionid:" << outcome.result().VersionId() << ",DeleteMarker:" << outcome.result().DeleteMarker() << std::endl;
    }
    else {
        /* 异常处理 */
        std::cout << "PutObject fail" <<
        ",code:" << outcome.error().Code() <<
        ",message:" << outcome.error().Message() <<
        ",requestId:" << outcome.error().RequestId() << std::endl;
        ShutdownSdk();
        return -1;
    }

    /* 释放网络等资源 */
    ShutdownSdk();
    return 0;
}

删除单个文件的详细信息请参见DeleteObject。

删除多个文件

在开启版本控制的Bucket中，您可以使用DeleteObjectVersions接口来批量删除Object。在Delete请求中如果没有指定versionId，将插入删除标记。如果指定了versionId，将永久删除该Object的指定版本。

以下提供了不指定versionID和指定versionId删除多个Object的示例：

不指定versionID删除多个Object

以下代码用于不指定versionId删除多个Object：

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

int main(void)
{
    /*初始化OSS账号信息*/
    std::string AccessKeyId = "yourAccessKeyId";
    std::string AccessKeySecret = "yourAccessKeySecret";
    std::string Endpoint = "yourEndpoint";
    std::string BucketName = "yourBucketName";
    std::string ObjectName = "yourObjectName";

    /* 初始化网络等资源 */
    InitializeSdk();

    ClientConfiguration conf;
    OssClient client(Endpoint, AccessKeyId, AccessKeySecret, conf);

    DeleteObjectVersionsRequest request(BucketName);
    /* 添加要删除文件的文件名称 */
    ObjectIdentifier obj1(ObjectName1);
    ObjectIdentifier obj2(ObjectName2);
    ObjectIdentifier obj3(ObjectName3);

    request.addObject(obj1);
    request.addObject(obj2);
    request.addObject(obj3);

    /* 删除文件 */
    auto outcome = client.DeleteObjectVersions(request);

    if (outcome.isSuccess()) {
        for (auto const &obj : outcome.result().DeletedObjects()) {
            std::cout << "versionid:" << obj.VersionId() << ",DeleteMarker:" << obj.DeleteMarker() << std::endl;
        }
    }
    else {
        /* 异常处理 */
        std::cout << "DeleteObjectVersions fail" <<
        ",code:" << outcome.error().Code() <<
        ",message:" << outcome.error().Message() <<
        ",requestId:" << outcome.error().RequestId() << std::endl;
        ShutdownSdk();
        return -1;
    }


    /* 释放网络等资源 */
    ShutdownSdk();
    return 0;
}

指定versionId删除多个Object

以下代码用于删除多个指定versionId的Object或指定删除标记versionId关联的Object：

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

int main(void)
{
    /*初始化OSS账号信息*/
    std::string AccessKeyId = "yourAccessKeyId";
    std::string AccessKeySecret = "yourAccessKeySecret";
    std::string Endpoint = "yourEndpoint";
    std::string BucketName = "yourBucketName";
    std::string ObjectName = "yourObjectName";

    /* 初始化网络等资源 */
    InitializeSdk();

    ClientConfiguration conf;
    OssClient client(Endpoint, AccessKeyId, AccessKeySecret, conf);

    DeleteObjectVersionsRequest  request(BucketName);

    /*添加需要删除的Object的版本id或者删除标记版本id*/
    ObjectIdentifier obj1("yourObject1Name");
    obj1.setVersionId("yourVersionId");

    ObjectIdentifier obj2("yourObject2Name");
    obj2.setVersionId("obj2_del_marker_versionid");

    request.addObject(obj1);
    request.addObject(obj2);

    /*批量删除指定版本id的object或批量删除指定删除标记版本id的object*/
    auto outcome = client.DeleteObjectVersions(request);

    if (!outcome.isSuccess()) {
        /* 异常处理 */
        std::cout << "DeleteObjectVersions fail" <<
        ",code:" << outcome.error().Code() <<
        ",message:" << outcome.error().Message() <<
        ",requestId:" << outcome.error().RequestId() << std::endl;
        ShutdownSdk();
        return -1;
    }

    /* 释放网络等资源 */
    ShutdownSdk();
    return 0;
}

删除多个文件的详细信息请参见DeleteMultipleObjects。

删除指定前缀的文件

以下代码用于删除指定前缀（prefix）的文件：

#include <alibabacloud/oss/OssClient.h>

using namespace AlibabaCloud::OSS;

int main(void)
{
    /* 初始化OSS账号信息 */
    std::string AccessKeyId = "yourAccessKeyId";
    std::string AccessKeySecret = "yourAccessKeySecret";
    std::string Endpoint = "yourEndpoint";
    std::string BucketName = "yourBucketName";
    std::string ObjectName = "yourObjectName";

    /* 初始化网络等资源 */
    InitializeSdk();

    ClientConfiguration conf;
    OssClient client(Endpoint, AccessKeyId, AccessKeySecret, conf);

    ListObjectVersionsRequest request(BucketName);
    bool IsTruncated = false;

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

            if (outcome.isSuccess()) {
                /*查看列举的Object删除标记的各版本信息*/
                for (auto const &marker : outcome.result().DeleteMarkerSummarys()) {
                   client.DeleteObject(DeleteObjectRequest(bucket, marker.Key(), marker.VersionId()));
                }

                /*列举所有指定前缀的Object的版本信息并删除*/
                for (auto const &obj : outcome.result().ObjectVersionSummarys()) {
                     client.DeleteObject(DeleteObjectRequest(bucket, obj.Key(), obj.VersionId()));
                }
            }
            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);

    /* 释放网络等资源 */
    ShutdownSdk();
    return 0;
}