Log storage (C++ SDK)

Notes

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

• This topic demonstrates creating an OSSClient instance with an OSS endpoint. For alternative configurations, such as using a custom domain or authenticating with credentials from Security Token Service (STS), see Create an OssClient instance.

• Managing logging for a bucket requires specific permissions: oss:PutBucketLogging to enable, oss:GetBucketLogging to query, and oss:DeleteBucketLogging to disable. For more information, see Grant a custom policy.

Enable logging for a bucket

The following sample code provides an example on how to enable logging for a bucket:

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

int main(void)
{
    /* Initialize the OSS account information. */
            
    /* Set Endpoint to the Endpoint of the region where the bucket is located. For example, if the bucket is in the China (Hangzhou) region, set Endpoint to https://oss-cn-hangzhou.aliyuncs.com. */
    std::string Endpoint = "yourEndpoint";
    /* Set Region to the region where the bucket is located. For example, if the bucket is in the China (Hangzhou) region, set Region to cn-hangzhou. */
    std::string Region = "yourRegion";
    /* Enter the name of the bucket for which you want to enable log storage, for example, examplebucket. */
    std::string BucketName = "examplebucket";
    /* Enter the destination bucket to store the log files. The targetBucketName and bucketName can be the same or different. */
    std::string TargetBucketName = "destbucket";
    /* Set the folder where the log files are stored to log/. If you specify this parameter, the log files are saved to the specified folder in the destination bucket. If you do not specify this parameter, the log files are saved to the root directory of the destination bucket. */
    std::string TargetPrefix  ="log/";

    /* Initialize network resources. */
    InitializeSdk();

    ClientConfiguration conf;
    conf.signatureVersion = SignatureVersionType::V4;
    /* Obtain access credentials from environment variables. Before you run this sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are set. */
    auto credentialsProvider = std::make_shared<EnvironmentVariableCredentialsProvider>();
    OssClient client(Endpoint, credentialsProvider, conf);
    client.SetRegion(Region); 

    /* Enable the log storage feature. */
    SetBucketLoggingRequest request(BucketName, TargetBucketName, TargetPrefix);
    auto outcome = client.SetBucketLogging(request);

    if (!outcome.isSuccess()) {
        /* Handle exceptions. */
        std::cout << "SetBucketLogging fail" <<
        ",code:" << outcome.error().Code() <<
        ",message:" << outcome.error().Message() <<
        ",requestId:" << outcome.error().RequestId() << std::endl;
        return -1;
    }

    /* Release network resources. */
    ShutdownSdk();
    return 0;
}

Query the logging configurations of a bucket

The following sample code provides an example on how to query the logging configurations of a bucket:

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

int main(void)
{
    /* Initialize the OSS account information. */
            
    /* Set Endpoint to the Endpoint of the region where the bucket is located. For example, if the bucket is in the China (Hangzhou) region, set Endpoint to https://oss-cn-hangzhou.aliyuncs.com. */
    std::string Endpoint = "yourEndpoint";
    /* Set Region to the region where the bucket is located. For example, if the bucket is in the China (Hangzhou) region, set Region to cn-hangzhou. */
    std::string Region = "yourRegion";
    /* Enter the bucket name, for example, examplebucket. */
    std::string BucketName = "examplebucket";

    /* Initialize network resources. */
    InitializeSdk();

    ClientConfiguration conf;
    conf.signatureVersion = SignatureVersionType::V4;
    /* Obtain access credentials from environment variables. Before you run this sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are set. */
    auto credentialsProvider = std::make_shared<EnvironmentVariableCredentialsProvider>();
    OssClient client(Endpoint, credentialsProvider, conf);
    client.SetRegion(Region);

    /* View the log storage configuration. */
    GetBucketLoggingRequest request(BucketName);
    auto outcome = client.GetBucketLogging(request);

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

    /* Release network resources. */
    ShutdownSdk();
    return 0;
}

Disable logging for a bucket

The following sample code provides an example on how to disable logging for a bucket:

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

int main(void)
{
    /* Initialize the OSS account information. */
            
    /* Set Endpoint to the Endpoint of the region where the bucket is located. For example, if the bucket is in the China (Hangzhou) region, set Endpoint to https://oss-cn-hangzhou.aliyuncs.com. */
    std::string Endpoint = "yourEndpoint";
    /* Set Region to the region where the bucket is located. For example, if the bucket is in the China (Hangzhou) region, set Region to cn-hangzhou. */
    std::string Region = "yourRegion";
    /* Enter the bucket name, for example, examplebucket. */
    std::string BucketName = "examplebucket";

    /* Initialize network resources. */
    InitializeSdk();

    ClientConfiguration conf;
    conf.signatureVersion = SignatureVersionType::V4;
    /* Obtain access credentials from environment variables. Before you run this sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are set. */
    auto credentialsProvider = std::make_shared<EnvironmentVariableCredentialsProvider>();
    OssClient client(Endpoint, credentialsProvider, conf);
    client.SetRegion(Region);

    /* Disable the log storage feature. */
    DeleteBucketLoggingRequest request(BucketName);
    auto outcome = client.DeleteBucketLogging(request);

    if (!outcome.isSuccess()) {
        /* Handle exceptions. */
        std::cout << "DeleteBucketLogging fail" <<
        ",code:" << outcome.error().Code() <<
        ",message:" << outcome.error().Message() <<
        ",requestId:" << outcome.error().RequestId() << std::endl;
        return -1;
    }

    /* Release network resources. */
    ShutdownSdk();
    return 0;
}

References

• For the complete sample code for log storage, see the GitHub example.

• PutBucketLogging

• GetBucketLogging

• DeleteBucketLogging