Torch Object Storage
Torch Object Storage
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- Documentation
Torch Object StorageSDK ReferenceC++Object InterfaceCopy ObjectStandard Copy (C++ SDK)
Copy page
Download PDFCopy Object
Standard Copy (C++ SDK)
Copy pageDownload PDFStandard Copy (C++ SDK)
The copyObject operation enables copying objects between buckets within the same region, as well as copying objects within a single bucket. During copying, you can specify new metadata or retain the metadata of the source object.
Precautions
- File copying does not support cross-region bucket-to-bucket copying.
- When copying an object, the account must have read permission for the source object and write permission for the destination bucket.
- When copying an object, you can retain all metadata (by default) or specify new metadata. However, the ACL was not retained; instead, it was set to private.
Sample Code
Standard Copy
When the object is smaller than 5 GiB, you can use standard copy. The following code copies the srcdir/exampleobject.txt object from the srcbucket bucket to the destbucket bucket and sets the object name to destdir/exampleobject.txt.
#include "TosClientV2.h"
using namespace VolcengineTos;
int main(void){
std::string region = "Your Region";
std::string accessKey = std::getenv("TOS_ACCESS_KEY");
std::string secretKey = std::getenv("TOS_SECRET_KEY");
std::string bucketName = "destbucket";
std::string objectName = "destdir/exampleobject.txt";
std::string srcBucketName = "srcbucket";
std::string srcObjectName = "srcdir/exampleobject.txt";
InitializeClient();
TosClientV2 client(region, accessKey, secretKey);
CopyObjectV2Input input(bucketName, objectName, srcBucketName,srcObjectName);
input.setAcl(ACLType::PublicRead);
input.setStorageClass(StorageClassType::STANDARD);
input.setMetadataDirective(MetadataDirectiveType::REPLACE);
auto output = client.copyObject(input);
if (!output.isSuccess()) {
std::cout << "CopyObject failed." << output.error().String() << std::endl;
CloseClient();
return -1;
}
std::cout << "CopyObject success. the object etag:" << output.result().getETag() << std::endl;
CloseClient();
return 0;
}
Inherit source object metadata during copy
#include "TosClientV2.h"
using namespace VolcengineTos;
int main(void){
std::string region = "Your Region";
std::string accessKey = std::getenv("TOS_ACCESS_KEY");
std::string secretKey = std::getenv("TOS_SECRET_KEY");
std::string bucketName = "destbucket";
std::string objectName = "destdir/exampleobject.txt";
std::string srcBucketName = "srcbucket";
std::string srcObjectName = "srcdir/exampleobject.txt";
InitializeClient();
TosClientV2 client(region, accessKey, secretKey);
CopyObjectV2Input input(bucketName, objectName, srcBucketName,srcObjectName);
auto output = client.copyObject(input);
if (!output.isSuccess()) {
std::cout << "CopyObject failed." << output.error().String() << std::endl;
CloseClient();
return -1;
}
std::cout << "CopyObject success. the object etag:" << output.result().getETag() << std::endl;
CloseClient();
return 0;
}
Overwrite object metadata during copy
#include "TosClientV2.h"
using namespace VolcengineTos;
int main(void){
std::string region = "Your Region";
std::string accessKey = std::getenv("TOS_ACCESS_KEY");
std::string secretKey = std::getenv("TOS_SECRET_KEY");
std::string bucketName = "destbucket";
std::string objectName = "destdir/exampleobject.txt";
std::string srcBucketName = "srcbucket";
std::string srcObjectName = "srcdir/exampleobject.txt";
InitializeClient();
TosClientV2 client(region, accessKey, secretKey);
CopyObjectV2Input input(bucketName, objectName, srcBucketName,srcObjectName);
input.setMetadataDirective(MetadataDirectiveType::REPLACE);
input.setMeta({{"self-test", "yes"}});
auto output = client.copyObject(input);
if (!output.isSuccess()) {
std::cout << "CopyObject failed." << output.error().String() << std::endl;
CloseClient();
return -1;
}
std::cout << "CopyObject success. the object etag:" << output.result().getETag() << std::endl;
CloseClient();
return 0;
}
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Last updated: 2025.09.25 14:22:47
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