歸檔或冷歸檔類型的Object需要解凍(Restore)之後才能讀取。本文介紹如何解凍歸檔和冷歸檔Object。
注意事項
僅歸檔、冷歸檔類型的Object支援調用RestoreObject方法。
本文以華東1(杭州)外網Endpoint為例。如果您希望通過與OSS同地區的其他阿里雲產品訪問OSS,請使用內網Endpoint。關於OSS支援的Region與Endpoint的對應關係,請參見訪問網域名稱和資料中心。
本文以OSS網域名稱建立OSSClient為例。如果您希望通過自訂網域名、STS等方式建立OSSClient,請參見建立OssClient。
要解凍檔案,您必須有
oss:RestoreObject
許可權。具體操作,請參見為RAM使用者授權自訂的權限原則。
解凍歸檔Object
以下代碼用於解凍歸檔Object:
#include <alibabacloud/oss/OssClient.h>
#include <thread>
#include <chrono>
#include <algorithm>
using namespace AlibabaCloud::OSS;
int main(void)
{
/*初始化OSS帳號資訊。*/
/*yourEndpoint填寫Bucket所在地區對應的Endpoint。以華東1(杭州)為例,Endpoint填寫為https://oss-cn-hangzhou.aliyuncs.com。*/
std::string Endpoint = "yourEndpoint";
/*填寫Bucket名稱,例如examplebucket。*/
std::string BucketName = "examplebucket";
/*填寫不包含Bucket名稱在內的歸檔類型Object的完整路徑。*/
std::string ObjectName = "yourObjectName";
/*初始化網路等資源。*/
InitializeSdk();
ClientConfiguration conf;
/* 從環境變數中擷取訪問憑證。運行本程式碼範例之前,請確保已設定環境變數OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。*/
auto credentialsProvider = std::make_shared<EnvironmentVariableCredentialsProvider>();
OssClient client(Endpoint, credentialsProvider, conf);
/*解凍歸檔Object。*/
auto outcome = client.RestoreObject(BucketName, ObjectName);
/*非歸檔Object不能解凍。*/
if (!outcome.isSuccess()) {
/*異常處理。*/
std::cout << "RestoreObject fail,code:" << outcome.error().Code() <<
",message:" << outcome.error().Message() <<
",requestId:" << outcome.error().RequestId() << std::endl;
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;
/*成功解凍歸檔Object。*/
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;
}
/*釋放網路等資源。*/
ShutdownSdk();
return 0;
}
解凍冷歸檔Object
以下代碼用於解凍冷歸檔Object:
#include <alibabacloud/oss/OssClient.h>
using namespace AlibabaCloud::OSS;
int main(void)
{
/*初始化OSS帳號資訊。*/
/*yourEndpoint填寫Bucket所在地區對應的Endpoint。以華東1(杭州)為例,Endpoint填寫為https://oss-cn-hangzhou.aliyuncs.com。*/
std::string Endpoint = "yourEndpoint";
/*填寫Bucket名稱,例如examplebucket。*/
std::string BucketName = "examplebucket";
/*填寫不包含Bucket名稱在內的冷歸檔類型Object的完整路徑。*/
std::string ObjectName = "yourObjectName";
/*初始化網路等資源。*/
InitializeSdk();
ClientConfiguration conf;
/* 從環境變數中擷取訪問憑證。運行本程式碼範例之前,請確保已設定環境變數OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。*/
auto credentialsProvider = std::make_shared<EnvironmentVariableCredentialsProvider>();
OssClient client(Endpoint, credentialsProvider, conf);
/*如果上傳檔案的同時指定檔案儲存體類型為冷歸檔,請參考如下代碼。*/
//auto content = std::make_shared<std::stringstream>("test");
//PutObjectRequest putRequest(BucketName, ObjectName, content);
//putRequest.MetaData().addHeader("x-oss-storage-class", "ColdArchive");
//auto putOutcome = client.PutObject(putRequest);
RestoreObjectRequest request(BucketName, ObjectName);
/*設定解凍之後保持解凍狀態的天數,預設值為1天。*/
request.setDays(2);
/*設定解凍冷歸檔類型檔案的優先順序。TierType::Bulk表示5~12個小時之內解凍完成。*/
request.setTierType(TierType::Bulk);
auto outcome = client.RestoreObject(request);
if (!outcome.isSuccess()) {
/*異常處理。*/
std::cout << "Delete Bucket Inventory fail" <<
",code:" << outcome.error().Code() <<
",message:" << outcome.error().Message() <<
",requestId:" << outcome.error().RequestId() << std::endl;
}
/*釋放網路等資源。*/
ShutdownSdk();
return 0;
}
相關文檔
關於解凍歸檔和冷歸檔類型Object的完整範例程式碼,請參見GitHub樣本。
關於解凍Object的API介面說明,請參見RestoreObject。