解冻归档文件

1. 归档类型的Object初始时处于冷冻状态。
2. 提交一次解冻请求后，Object处于解冻中的状态。完成解冻任务通常需要1分钟，最长等待任务完成时间为4小时。
3. 服务端完成解冻任务后，Object进入解冻状态，此时您可以读取Object。解冻状态默认持续24小时，24小时内再次调用RestoreObject接口则解冻状态会自动延长24小时。对于同份归档文件，一次解冻流程内可有效调用7次RestoreObject接口达到最长7天的解冻持续时间。
4. 解冻状态结束后，Object再次返回到冷冻状态。

#include <alibabacloud/oss/OssClient.h>
#include <thread>
#include <chrono>
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);

    /* 解冻归档文件 */
    auto outcome = client.RestoreObject(BucketName, ObjectName);

    /* 非归档文件不能解冻 */
    if (!outcome.isSuccess()) {
        /* 异常处理 */
        std::cout << "RestoreObject fail" <<
        ",code:" << outcome.error().Code() <<
        ",message:" << outcome.error().Message() <<
        ",requestId:" << outcome.error().RequestId() << std::endl;
        ShutdownSdk();
        return -1;
    }

    std::string onGoingRestore("ongoing-request=\"false\"");

    int maxWaitTimeInSeconds = 600;
    while (maxWaitTimeInSeconds > 0)
    {
        auto meta = client.HeadObject(BucketName, ObjectName);

        std::string restoreStatus = meta.result().HttpMetaData()["x-oss-restore"];
        std::transform(restoreStatus.begin(), restoreStatus.end(), restoreStatus.begin(), ::tolower);
        if (!restoreStatus.empty() && 
        restoreStatus.compare(0, onGoingRestore.size(), onGoingRestore)==0) {
            std::cout << " success, restore status:" << restoreStatus << std::endl;
            /* 成功解冻归档文件*/
            break;
        }

        std::cout << " info, WaitTime:" << maxWaitTimeInSeconds
        << "; restore status:" << restoreStatus << std::endl;

        std::this_thread::sleep_for(std::chrono::seconds(10));
        maxWaitTimeInSeconds--;     
    }

    if (maxWaitTimeInSeconds == 0)
    {
        std::cout << "RestoreObject fail, TimeoutException" << std::endl;
    }

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