OSS支援使用對象標籤（Object Tagging）對儲存空間（Bucket）中的檔案（Object）進行分類，您可以針對相同標籤的Object設定生命週期規則、存取權限等。
說明
關於對象標籤的更多資訊，請參見對象標籤。
注意事項
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。
要設定對象標籤，您必須具有
oss:PutObjectTagging許可權。具體操作，請參見為RAM使用者授權自訂的權限原則。
上傳Object時添加對象標籤
簡單上傳時添加對象標籤
#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 = "https://oss-cn-hangzhou.aliyuncs.com";
/* 填寫Bucket名稱，例如examplebucket。*/
std::string BucketName = "examplebucket";
/* 填寫Object完整路徑，完整路徑中不能包含Bucket名稱，例如exampledir/exampleobject.txt。*/
std::string ObjectName = "exampledir/exampleobject.txt";
/* 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);
std::shared_ptr<std::iostream> content = std::make_shared<std::stringstream>();
*content << "test cpp sdk";
PutObjectRequest request(BucketName, ObjectName, content);
/* 設定標籤。*/
Tagging tagging;
tagging.addTag(Tag("key1", "value1"));
tagging.addTag(Tag("key2", "value2"));
request.setTagging(tagging.toQueryParameters());
/* 上傳檔案。*/
auto outcome = client.PutObject(request);
if (!outcome.isSuccess()) {
/* 異常處理。*/
std::cout << "PutObject fail" <<
",code:" << outcome.error().Code() <<
",message:" << outcome.error().Message() <<
",requestId:" << outcome.error().RequestId() << std::endl;
return -1;
}
/* 釋放網路等資源。*/
ShutdownSdk();
return 0;
}分區上傳時添加對象標籤
#include <alibabacloud/oss/OssClient.h>
#include <fstream>
int64_t getFileSize(const std::string& file)
{
std::fstream f(file, std::ios::in | std::ios::binary);
f.seekg(0, f.end);
int64_t size = f.tellg();
f.close();
return size;
}
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 = "https://oss-cn-hangzhou.aliyuncs.comm";
/* 填寫Bucket名稱，例如examplebucket。*/
std::string BucketName = "examplebucket";
/* 填寫Object完整路徑，完整路徑中不能包含Bucket名稱，例如exampledir/exampleobject.txt。*/
std::string ObjectName = "exampledir/exampleobject.txt";
/* 填寫本地檔案完整路徑。*/
std::string fileToUpload = "yourFilePath";
/* 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);
InitiateMultipartUploadRequest initUploadRequest(BucketName, ObjectName);
/* 設定標籤。*/
Tagging tagging;
tagging.addTag(Tag("key1", "value1"));
tagging.addTag(Tag("key2", "value2"));
initUploadRequest.setTagging(tagging.toQueryParameters());
/* 初始化分區上傳事件。*/
auto uploadIdResult = client.InitiateMultipartUpload(initUploadRequest);
auto uploadId = uploadIdResult.result().UploadId();
int64_t partSize = 100 * 1024;
PartList partETagList;
auto fileSize = getFileSize(fileToUpload);
int partCount = static_cast<int>(fileSize / partSize);
/* 計算分區個數。*/
if (fileSize % partSize != 0) {
partCount++;
}
/* 對每一個分區進行上傳。*/
for (int i = 1; i <= partCount; i++) {
auto skipBytes = partSize * (i - 1);
auto size = (partSize < fileSize - skipBytes) ? partSize : (fileSize - skipBytes);
std::shared_ptr<std::iostream> content = std::make_shared<std::fstream>(fileToUpload, std::ios::in|std::ios::binary);
content->seekg(skipBytes, std::ios::beg);
UploadPartRequest uploadPartRequest(BucketName, ObjectName, content);
uploadPartRequest.setContentLength(size);
uploadPartRequest.setUploadId(uploadId);
uploadPartRequest.setPartNumber(i);
auto uploadPartOutcome = client.UploadPart(uploadPartRequest);
if (uploadPartOutcome.isSuccess()) {
Part part(i, uploadPartOutcome.result().ETag());
partETagList.push_back(part);
}
else {
std::cout << "uploadPart fail" <<
",code:" << uploadPartOutcome.error().Code() <<
",message:" << uploadPartOutcome.error().Message() <<
",requestId:" << uploadPartOutcome.error().RequestId() << std::endl;
}
}
/* 完成分區上傳。*/
CompleteMultipartUploadRequest request(BucketName, ObjectName);
request.setUploadId(uploadId);
request.setPartList(partETagList);
auto outcome = client.CompleteMultipartUpload(request);
if (!outcome.isSuccess()) {
/* 異常處理。*/
std::cout << "CompleteMultipartUpload fail" <<
",code:" << outcome.error().Code() <<
",message:" << outcome.error().Message() <<
",requestId:" << outcome.error().RequestId() << std::endl;
return -1;
}
/* 釋放網路等資源。*/
ShutdownSdk();
return 0;
}追加上傳時添加對象標籤
#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 = "https://oss-cn-hangzhou.aliyuncs.com";
/* 填寫Bucket名稱，例如examplebucket。*/
std::string BucketName = "examplebucket";
/* 填寫Object完整路徑，完整路徑中不能包含Bucket名稱，例如exampledir/exampleobject.txt。*/
std::string ObjectName = "exampledir/exampleobject.txt";
/* 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);
auto meta = ObjectMetaData();
meta.setContentType("text/plain");
/* 追加檔案，預設追加position為0。*/
std::shared_ptr<std::iostream> content1 = std::make_shared<std::stringstream>();
*content1 <<"Thank you for using Aliyun Object Storage Service!";
AppendObjectRequest request(BucketName, ObjectName, content1, meta);
/* 設定標籤。*/
Tagging tagging;
tagging.addTag(Tag("key1", "value1"));
tagging.addTag(Tag("key2", "value2"));
request.setTagging(tagging.toQueryParameters());
/* 追加檔案。*/
auto result = client.AppendObject(request);
if (!result.isSuccess()) {
/* 異常處理。*/
std::cout << "AppendObject fail" <<
",code:" << result.error().Code() <<
",message:" << result.error().Message() <<
",requestId:" << result.error().RequestId() << std::endl;
return -1;
}
/* 釋放網路等資源。*/
ShutdownSdk();
return 0;
}斷點續傳上傳時添加對象標籤
#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 = "https://oss-cn-hangzhou.aliyuncs.com";
/* 填寫Bucket名稱，例如examplebucket。*/
std::string BucketName = "examplebucket";
/* 填寫Object完整路徑，完整路徑中不能包含Bucket名稱，例如exampledir/exampleobject.txt。*/
std::string ObjectName = "exampledir/exampleobject.txt";
std::string UploadFilePath = "yourUploadfilePath";
/* 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);
/* 斷點續傳上傳 */
UploadObjectRequest request(BucketName, ObjectName, UploadFilePath);
/* 設定對象標籤 */
Tagging tagging;
tagging.addTag(Tag("key1", "value1"));
tagging.addTag(Tag("key2", "value2"));
request.setTagging(tagging.toQueryParameters());
auto outcome = client.ResumableUploadObject(request);
if (!outcome.isSuccess()) {
/* 異常處理 */
std::cout << "ResumableUploadObject fail" <<
",code:" << outcome.error().Code() <<
",message:" << outcome.error().Message() <<
",requestId:" << outcome.error().RequestId() << std::endl;
return -1;
}
/* 釋放網路等資源 */
ShutdownSdk();
return 0;
}對已上傳Object添加或更改對象標籤
以下代碼用於對已上傳Object添加或更改對象標籤：
#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 = "https://oss-cn-hangzhou.aliyuncs.com";
/* 填寫Bucket名稱，例如examplebucket。*/
std::string BucketName = "examplebucket";
/* 填寫Object完整路徑，完整路徑中不能包含Bucket名稱，例如exampledir/exampleobject.txt。*/
std::string ObjectName = "exampledir/exampleobject.txt";
/* 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);
std::shared_ptr<std::iostream> content = std::make_shared<std::stringstream>();
*content << "test cpp sdk";
PutObjectRequest request(BucketName, ObjectName, content);
/* 上傳檔案。*/
auto outcome = client.PutObject(request);
/* 設定標籤。*/
Tagging tagging;
tagging.addTag(Tag("key1", "value1"));
tagging.addTag(Tag("key2", "value2"));
auto putTaggingOutcome = client.SetObjectTagging(SetObjectTaggingRequest(BucketName, ObjectName, tagging));
if (!putTaggingOutcome.isSuccess()) {
/* 異常處理。*/
std::cout << "SetObjectTagging fail" <<
",code:" << putTaggingOutcome.error().Code() <<
",message:" << putTaggingOutcome.error().Message() <<
",requestId:" << putTaggingOutcome.error().RequestId() << std::endl;
return -1;
}
/* 釋放網路等資源。*/
ShutdownSdk();
return 0;
}拷貝Object時設定對象標籤
拷貝Object時，可以指定如何設定目標Object的對象標籤。取值如下：
Copy（預設值）：複製源Object的對象標籤到目標Object。
Replace：忽略源Object的對象標籤，直接採用請求中指定的對象標籤。
以下分別提供了簡單拷貝1 GB以下的Object及分區拷貝1 GB以上的Object時設定對象標籤的詳細樣本。
簡單拷貝時設定對象標籤
以下代碼用於簡單拷貝1 GB以下的Object時設定對象標籤：
#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 = "https://oss-cn-hangzhou.aliyuncs.com";
/* 填寫Bucket名稱，例如examplebucket。*/
std::string BucketName = "examplebucket";
/* 填寫目標Object完整路徑，完整路徑中不能包含Bucket名稱，例如exampledir/exampleobject.txt。*/
std::string ObjectName = "exampledir/exampleobject.txt";
/* 填寫源Object的完整路徑。*/
std::string CopyObjectName = "scrdir/scrobject.txt";
/* 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);
std::shared_ptr<std::iostream> content = std::make_shared<std::stringstream>();
*content << "test cpp sdk";
PutObjectRequest request(BucketName, ObjectName, content);
/* 設定標籤。*/
Tagging tagging;
tagging.addTag(Tag("key1", "value1"));
tagging.addTag(Tag("key2", "value2"));
request.setTagging(tagging.toQueryParameters());
/* 上傳檔案。*/
auto outcome = client.PutObject(request);
/* 拷貝檔案時設定標籤。 */
CopyObjectRequest cpRequest(BucketName, CopyObjectName);
cpRequest.setCopySource(BucketName, ObjectName);
Tagging tagging2;
tagging2.addTag(Tag("key1-2", "value1-2"));
tagging2.addTag(Tag("key2-2", "value2-2"));
tagging2.addTag(Tag("key3-2", "value3-2"));
cpRequest.setTagging(tagging2.toQueryParameters());
/* 忽略源Object的對象標籤，直接替換為請求中指定的對象標籤。*/
cpRequest.setTaggingDirective(CopyActionList::Replace);
/* 拷貝檔案。*/
auto copyoutcome = client.CopyObject(cpRequest);
if (!copyoutcome.isSuccess()) {
/* 異常處理。*/
std::cout << "CopyObject fail" <<
",code:" << copyoutcome.error().Code() <<
",message:" << copyoutcome.error().Message() <<
",requestId:" << copyoutcome.error().RequestId() << std::endl;
return -1;
}
/* 釋放網路等資源。*/
ShutdownSdk();
return 0;
}分區拷貝時設定對象標籤
以下代碼用於分區拷貝1 GB 以上的Object時設定對象標籤：
#include <alibabacloud/oss/OssClient.h>
#include <sstream>
using namespace AlibabaCloud::OSS;
int main(void)
{
/* 初始化OSS帳號資訊 */
/* 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 = "https://oss-cn-hangzhou.aliyuncs.com";
/* 填寫源Bucket名稱，例如srcexamplebucket。*/
std::string SourceBucketName = "srcexamplebucket";
/* 填寫與源Bucket處於同一地區的目標Bucket名稱，例如destbucket。*/
std::string CopyBucketName = "destbucket";
/* 填寫源Object的完整路徑，完整路徑中不能包含Bucket名稱，例如srcdir/scrobject.txt。*/
std::string SourceObjectName = "srcdir/scrobject.txt";
/* 填寫目標Object的完整路徑，完整路徑中不能包含Bucket名稱，例如destdir/destobject.txt。*/
std::string CopyObjectName = "destdir/destobject.txt";
/* 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);
auto getObjectMetaReq = GetObjectMetaRequest(SourceBucketName, SourceObjectName);
auto getObjectMetaResult = client.GetObjectMeta(getObjectMetaReq);
if (!getObjectMetaResult.isSuccess()) {
std::cout << "GetObjectMeta fail" <<
",code:" << getObjectMetaResult.error().Code() <<
",message:" << getObjectMetaResult.error().Message() <<
",requestId:" << getObjectMetaResult.error().RequestId() << std::endl;
return -1;
}
/* 擷取被拷貝檔案的大小。*/
auto objectSize = getObjectMetaResult.result().ContentLength();
/* 拷貝大檔案。*/
InitiateMultipartUploadRequest initUploadRequest(CopyBucketName, CopyObjectName);
/* 設定標籤。*/
Tagging tagging;
tagging.addTag(Tag("key1", "value1"));
tagging.addTag(Tag("key2", "value2"));
initUploadRequest.setTagging(tagging.toQueryParameters());
/* 初始化分區拷貝事件。*/
auto uploadIdResult = client.InitiateMultipartUpload(initUploadRequest);
auto uploadId = uploadIdResult.result().UploadId();
int64_t partSize = 100 * 1024;
PartList partETagList;
int partCount = static_cast<int>(objectSize / partSize);
/* 計算分區個數。*/
if (objectSize % partSize != 0) {
partCount++;
}
/* 對每一個分區進行拷貝。*/
for (int i = 1; i <= partCount; i++) {
auto skipBytes = partSize * (i - 1);
auto size = (partSize < objectSize - skipBytes) ? partSize : (objectSize - skipBytes);
auto uploadPartCopyReq = UploadPartCopyRequest(CopyBucketName, CopyObjectName, SourceBucketName, SourceObjectName,uploadId, i);
uploadPartCopyReq.setCopySourceRange(skipBytes, skipBytes + size -1);
auto uploadPartOutcome = client.UploadPartCopy(uploadPartCopyReq);
if (uploadPartOutcome.isSuccess()) {
Part part(i, uploadPartOutcome.result().ETag());
partETagList.push_back(part);
}
else {
std::cout << "UploadPartCopy fail" <<
",code:" << uploadPartOutcome.error().Code() <<
",message:" << uploadPartOutcome.error().Message() <<
",requestId:" << uploadPartOutcome.error().RequestId() << std::endl;
}
}
/* 完成分區拷貝。*/
CompleteMultipartUploadRequest request(CopyBucketName, CopyObjectName, partETagList, uploadId);
auto outcome = client.CompleteMultipartUpload(request);
if (!outcome.isSuccess()) {
/* 異常處理。*/
std::cout << "CompleteMultipartUpload fail" <<
",code:" << outcome.error().Code() <<
",message:" << outcome.error().Message() <<
",requestId:" << outcome.error().RequestId() << std::endl;
return -1;
}
/* 釋放網路等資源。*/
ShutdownSdk();
return 0;
}為軟連結檔案設定標籤
以下代碼用於為軟連結檔案設定標籤：
#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 = "https://oss-cn-hangzhou.aliyuncs.com";
/* 填寫Bucket名稱，例如examplebucket。*/
std::string BucketName = "examplebucket";
/* 填寫Object完整路徑，完整路徑中不能包含Bucket名稱，例如exampledir/exampleobject.txt。*/
std::string ObjectName = "exampledir/exampleobject.txt";
/* 填寫軟連結名稱，例如symlink.txt。*/
std::string LinkName = "symlink.txt";
/* 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);
std::shared_ptr<std::iostream> content = std::make_shared<std::stringstream>();
*content << "test cpp sdk";
PutObjectRequest request(BucketName, ObjectName, content);
/* 上傳檔案。*/
auto outcome = client.PutObject(request);
/* 建立軟連結。*/
CreateSymlinkRequest csRequest(BucketName, ObjectName);
csRequest.SetSymlinkTarget(LinkName);
/* 設定標籤。*/
Tagging tagging;
tagging.addTag(Tag("key1", "value1"));
tagging.addTag(Tag("key2", "value2"));
csRequest.setTagging(tagging.toQueryParameters());
auto csoutcome = client.CreateSymlink(csRequest);
if (!csoutcome.isSuccess()) {
/* 異常處理。*/
std::cout << "CreateSymlink fail" <<
",code:" << csoutcome.error().Code() <<
",message:" << csoutcome.error().Message() <<
",requestId:" << csoutcome.error().RequestId() << std::endl;
return -1;
}
/* 釋放網路等資源。*/
ShutdownSdk();
return 0;
}相關文檔
關於設定對象標籤的完整範例程式碼，請參見GitHub樣本。
關於設定對象標籤的API介面說明，請參見PutObjectTagging。