创建存储空间

存储空间是OSS全局命名空间，相当于数据的容器，可以存储若干文件。 以下代码用于新建一个存储空间：

#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";

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

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

    /* 指定新创建bucket的名称、存储类型和ACL */
    CreateBucketRequest request(BucketName, StorageClass::IA, CannedAccessControlList::PublicReadWrite);

    /* 创建bucket */
    auto outcome = client.CreateBucket(request);

    if (!outcome.isSuccess()) {
        /* 异常处理 */
        std::cout << "CreateBucket 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;
}

存储空间的命名规范，请参见基本概念中的命名规范。创建存储空间详情，请参见创建存储空间。

获取endpoint信息，请参见访问域名和数据中心文档。

上传文件

以下代码用于上传文件至OSS：

#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";
    /* yourObjectName表示上传文件到OSS时需要指定包含文件后缀在内的完整路径，例如abc/efg/123.jpg */
    std::string ObjectName = "yourObjectName";

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

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

    /* 上传文件 */
    /* yourLocalFilename由本地文件路径加文件名包括后缀组成，例如/users/local/myfile.txt。
    auto outcome = client.PutObject(BucketName, ObjectName,"yourLocalFilename");

    if (!outcome.isSuccess()) {
        /* 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;
}

下载文件

以下代码用于将指定的OSS文件下载到本地文件：

#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";
    /* yourObjectName表示从OSS下载文件时需要指定包含文件后缀在内的完整路径，例如abc/efg/123.jpg */
    std::string ObjectName = "yourObjectName";
    /* yourFileName由本地文件路径加文件名包括后缀组成，例如/users/local/myfile.txt */
    std::string FileNametoSave = "yourFileName";

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

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

    /* 获取文件到本地文件 */
    GetObjectRequest request(BucketName, ObjectName);
    request.setResponseStreamFactory([=]() {return std::make_shared<std::fstream>(FileNametoSave, std::ios_base::out | std::ios_base::in | std::ios_base::trunc| std::ios_base::binary); });

    auto outcome = client.GetObject(request);

    if (outcome.isSuccess()) {    
        std::cout << "GetObjectToFile success, ContentLength is" << outcome.result().Metadata().ContentLength() << std::endl;
    }
    else {
        /* 异常处理 */
        std::cout << "GetObjectToFile 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;
}

列举文件

以下代码用于列举指定存储空间下的文件。默认列举100个文件。

#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";

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

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

    /* 列举文件 */
    ListObjectsRequest request(BucketName);
    auto outcome = client.ListObjects(request);

    if (!outcome.isSuccess()) {    
        /* 异常处理 */
        std::cout << "ListObjects fail" <<
        ",code:" << outcome.error().Code() <<
        ",message:" << outcome.error().Message() <<
        ",requestId:" << outcome.error().RequestId() << std::endl;
        ShutdownSdk();
        return -1;  
    }
    else {
        for (const auto& object : outcome.result().ObjectSummarys()) {
            std::cout << "object"<<
            ",name:" << object.Key() <<
            ",size:" << object.Size() <<
            ",last modified time:" << object.LastModified() << std::endl;
        }      
    }

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

删除文件

以下代码用于删除指定文件：

#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";
    /* yourObjectName表示删除OSS文件时需要指定包含文件后缀在内的完整路径，例如abc/efg/123.jpg */
    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);

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

    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;
}

删除文件详情请参见管理文件中的删除文件。