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Object Storage Service:Query the region of a bucket

Last Updated:Jan 15, 2024

A bucket is a container that is used to store objects in Object Storage Service (OSS). Every object is contained in a bucket. This topic describes how to query the region of a bucket.

Usage notes

  • In this topic, the public endpoint of the China (Hangzhou) region is used. If you want to access OSS by using other Alibaba Cloud services in the same region as OSS, use an internal endpoint. For more information about the regions and endpoints supported by OSS, see Regions and endpoints.

  • In this topic, an OSSClient instance is created by using an OSS endpoint. If you want to create an OSSClient instance by using custom domain names or Security Token Service (STS), see Create an OSSClient instance.

  • To query the region of a bucket, you must have the oss:GetBucketLocation permission. For more information, see Attach a custom policy to a RAM user.

Sample code

The following sample code shows how to query the region or location of a bucket:

#include <alibabacloud/oss/OssClient.h>
using namespace AlibabaCloud::OSS;

int main(void)
    /* Initialize information about the account that is used to access OSS. */
    /* Specify the endpoint of a region that is supported by OSS. Example: */
    std::string Endpoint = "yourEndpoint";
    /* Specify the bucket name. */
    std::string BucketName = "yourBucketName";

    /* Initialize resources such as network resources. */

    ClientConfiguration conf;
    /* Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. */
    auto credentialsProvider = std::make_shared<EnvironmentVariableCredentialsProvider>();
    OssClient client(Endpoint, credentialsProvider, conf);

    /* Query the region of the bucket. */
    GetBucketLocationRequest request(BucketName);
    auto outcome = client.GetBucketLocation(request);

    if (outcome.isSuccess()) {    
        std::cout << "getBucketLocation success, location: " << outcome.result().Location() << std::endl;
    else {
        /* Handle exceptions. */
        std::cout << "getBucketLocation fail" <<
        ",code:" << outcome.error().Code() <<
        ",message:" << outcome.error().Message() <<
        ",requestId:" << outcome.error().RequestId() << std::endl;
        return -1;

    /* Release resources such as network resources. */
    return 0;


  • For the complete sample code that is used to query the region of a bucket, visit GitHub.

  • For more information about the API operation that you can call to query the region of a bucket, see GetBucketLocation.