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Creating, listing, and deleting buckets

Every object or file in Amazon Simple Storage Service (Amazon S3) is contained in a bucket, which represents a folder of objects. Each bucket has a name that is globally unique within AWS. For more information, see Working with Amazon S3 Buckets in the Amazon Simple Storage Service User Guide.

Prerequisites

Before you begin, we recommend you read Getting started using the AWS SDK for C++.

Download the example code and build the solution as described in Get started on code examples.

To run the examples, the user profile your code uses to make the requests must have proper permissions in AWS (for the service and the action). For more information, see Providing AWS credentials.

List buckets

To run the list_buckets example, at a command prompt, navigate to the folder where your build system creates your build executables. Run the executable like run_list_buckets (your full executable filename will differ based on your operating system). The output lists your account's buckets if you have any, or it displays an empty list if you don't have any buckets.

In list_buckets.cpp, there are two methods.

The S3Client object calls the SDK's ListBuckets() method. If successful, the method returns a ListBucketOutcome object, which contains a ListBucketResult object. The ListBucketResult object calls the GetBuckets() method to get a list of Bucket objects that contain information about each Amazon S3 bucket in your account.

Code

bool AwsDoc::S3::listBuckets(const Aws::S3::S3ClientConfiguration &clientConfig) {
    Aws::S3::S3Client client(clientConfig);

    auto outcome = client.ListBuckets();

    bool result = true;
    if (!outcome.IsSuccess()) {
        std::cerr << "Failed with error: " << outcome.GetError() << std::endl;
        result = false;
    } else {
        std::cout << "Found " << outcome.GetResult().GetBuckets().size() << " buckets\n";
        for (auto &&b: outcome.GetResult().GetBuckets()) {
            std::cout << b.GetName() << std::endl;
        }
    }

    return result;
}

See the complete list_buckets example on Github.

Create a bucket

To run the create_bucket example, at a command prompt, navigate to the folder where your build system creates your build executables. Run the executable like run_create_bucket (your full executable filename will differ based on your operating system). The code creates an empty bucket under your account and then displays the success or failure of the request.

In create_bucket.cpp, there are two methods.

The S3Client object calls the SDK's CreateBucket() method, passing in a CreateBucketRequest with the bucket’s name. By default, buckets are created in the us-east-1 (N. Virginia) Region. If your Region is not us-east-1 then the code sets up a bucket constraint to ensure the bucket is created in your Region.

Code

bool AwsDoc::S3::createBucket(const Aws::String &bucketName,
                              const Aws::S3::S3ClientConfiguration &clientConfig) {
    Aws::S3::S3Client client(clientConfig);
    Aws::S3::Model::CreateBucketRequest request;
    request.SetBucket(bucketName);

    if (clientConfig.region != "us-east-1") {
        Aws::S3::Model::CreateBucketConfiguration createBucketConfig;
        createBucketConfig.SetLocationConstraint(
                Aws::S3::Model::BucketLocationConstraintMapper::GetBucketLocationConstraintForName(
                        clientConfig.region));
        request.SetCreateBucketConfiguration(createBucketConfig);
    }

    Aws::S3::Model::CreateBucketOutcome outcome = client.CreateBucket(request);
    if (!outcome.IsSuccess()) {
        auto err = outcome.GetError();
        std::cerr << "Error: createBucket: " <<
                  err.GetExceptionName() << ": " << err.GetMessage() << std::endl;
    } else {
        std::cout << "Created bucket " << bucketName <<
                  " in the specified AWS Region." << std::endl;
    }

    return outcome.IsSuccess();
}

See the complete create_buckets example on Github.

Delete a bucket

To run the delete_bucket example, at a command prompt, navigate to the folder where your build system creates your build executables. Run the executable like run_delete_bucket (your full executable filename will differ based on your operating system). The code deletes the specified bucket in your account and then displays the success or failure of the request.

In delete_bucket.cpp there are two methods.

The S3Client object uses the SDK's DeleteBucket() method, passing in a DeleteBucketRequest object with the name of the bucket to delete. The bucket must be empty to be successful.

Code

bool AwsDoc::S3::deleteBucket(const Aws::String &bucketName,
                              const Aws::S3::S3ClientConfiguration &clientConfig) {

    Aws::S3::S3Client client(clientConfig);

    Aws::S3::Model::DeleteBucketRequest request;
    request.SetBucket(bucketName);

    Aws::S3::Model::DeleteBucketOutcome outcome =
            client.DeleteBucket(request);

    if (!outcome.IsSuccess()) {
        const Aws::S3::S3Error &err = outcome.GetError();
        std::cerr << "Error: deleteBucket: " <<
                  err.GetExceptionName() << ": " << err.GetMessage() << std::endl;
    } else {
        std::cout << "The bucket was deleted" << std::endl;
    }

    return outcome.IsSuccess();
}

See the complete delete_bucket example on Github.