Torch Object Storage
Torch Object Storage
Torch Object Storage
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- Documentation
Torch Object StorageSDK ReferenceC++Bucket InterfaceManage Bucket ConfigurationManaging Mirroring Rules (C++ SDK)
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Download PDFManage Bucket Configuration
Managing Mirroring Rules (C++ SDK)
Copy pageDownload PDFManaging Mirroring Rules (C++ SDK)
Mirror-based back-to-origin (mirroring) is primarily used in scenarios involving seamless data migration to TOS. For example, when your web service is already running on a self-built origin server or other cloud products and you need to migrate it to TOS, you can use a mirroring rule during the migration process to retrieve some data that has not yet been migrated to TOS. This ensures the normal operation of the service throughout the migration.
Configure mirroring rules
warning
- To configure mirroring rules for a bucket, you must be the bucket owner.
- A bucket supports the creation of only one back-to-origin rule.
- Mirroring supports objects up to a maximum size of 5 GiB. If you need to request objects larger than 5 GiB, please use the range download feature.
- The maximum supported object size for redirect-based back-to-origin is 300 GiB.
Sample code
The following code is used to set the mirroring rule for the specified bucket examplebucket.
#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 = "examplebucket";
InitializeClient();
TosClientV2 client(region, accessKey, secretKey);
PutBucketMirrorBackInput input(bucketName);
MirrorBackRule rule1;
auto condition = rule1.getCondition();
condition.setHttpCode(404);
rule1.setCondition(condition);
auto redirect = Redirect();
redirect.setRedirectType(RedirectType::RedirectMirror);
SourceEndpoint endpoint;
endpoint.setPrimary({"https://www.example.com/"});
endpoint.setFollower({"https://www.example.com/"});
PublicSource publicSource(endpoint);
redirect.setPublicSource(publicSource);
redirect.setPassQuery(true);
redirect.setFollowRedirect(true);
redirect.setFetchSourceOnRedirect(true);
MirrorHeader mirrorHeaders;
mirrorHeaders.setPassAll(false);
mirrorHeaders.setPass({"header-1", "header-2"});
mirrorHeaders.setRemove({"header-3", "header-4"});
redirect.setMirrorHeader(mirrorHeaders);
std::vector<MirrorBackRule> rules{rule1};
input.setRules(rules);
auto output = client.putBucketMirrorBack(input);
if (!output.isSuccess()) {
std::cout << "PutBucketMirrorBack failed." << output.error().String() << std::endl;
CloseClient();
return -1;
}
std::cout << "PutBucketMirrorBack success." << std::endl;
CloseClient();
return 0;
}
Retrieve mirroring rules
warning
To retrieve the mirroring rules for a bucket, you must be the bucket owner.
Sample code
The following code is used to obtain the mirroring rules for the specified bucket examplebucket.
#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 = "examplebucket";
InitializeClient();
TosClientV2 client(region, accessKey, secretKey);
GetBucketMirrorBackInput input(bucketName);
auto output = client.getBucketMirrorBack(input);
if (!output.isSuccess()) {
std::cout << "GetBucketMirrorBack failed." << output.error().String() << std::endl;
CloseClient();
return -1;
}
auto mirrorBackRules= output.result().getRules();
for (auto& rule : mirrorBackRules){
std::cout << "rule:" << rule.getId() << std::endl;
auto conditon = rule.getCondition();
std::cout << "http code conditon:" << conditon.getHttpCode() << std::endl;
auto redirect = rule.getRedirect();
std::cout << "redirect:" << redirect.getStringFormatRedirectType() << "," << redirect.isFetchSourceOnRedirect() << "," <<
redirect.isPassQuery() << "," << redirect.isFollowRedirect() << std::endl;
auto mirrorHeader = redirect.getMirrorHeader();
std::cout << "redirect-mirrorHeader:" << mirrorHeader.isPassAll() << std::endl;
std::cout << "redirect-mirrorHeader-pass:" << std::endl;
for(auto& pass : mirrorHeader.getPass()){
std::cout << pass << std::endl;
}
std::cout << "redirect-mirrorHeader-remove:" << std::endl;
for(auto& remove : mirrorHeader.getRemove()){
std::cout << remove << std::endl;
}
auto publicSource = redirect.getPublicSource();
auto sourceEndpoint = publicSource.getSourceEndpoint();
std::cout << "redirect-publicSource-sourceEndpoint:" << std::endl;
std::cout << "redirect-publicSource-sourceEndpoint-primary:" << std::endl;
for(auto& primary : sourceEndpoint.getPrimary()){
std::cout << primary << std::endl;
}
std::cout << "redirect-publicSource-sourceEndpoint-follower:" << std::endl;
for(auto& follower : sourceEndpoint.getFollower()){
std::cout << follower << std::endl;
}
}
CloseClient();
return 0;
}
Delete mirroring rules
warning
To delete the mirroring rule for a bucket, you must be the bucket owner.
Sample code
The following code is used to delete the mirroring rule for the specified bucket examplebucket.
#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 = "examplebucket";
InitializeClient();
TosClientV2 client(region, accessKey, secretKey);
DeleteBucketMirrorBackInput input(bucketName);
auto output = client.deleteBucketMirrorBack(input);
if (!output.isSuccess()) {
std::cout << "DeleteBucketMirrorBack failed." << output.error().String() << std::endl;
CloseClient();
return -1;
}
std::cout << "DeleteBucketMirrorBack success." << std::endl;
CloseClient();
return 0;
}
Relevant documentation
Last updated: 2026.08.07 17:39:01
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