GetParametersRequest returns empty result list while the response body is not empty

[Mher594]

Trying to retrieve some parameters from AWS parameter store with GetParametersRequest. The region and credentials are configured already on my computer. The result is success and it's possible to read the response buffer in SetDataReceivedEvent handler however the size of the result is 0, using the code below. How should I retrieve the result without parsing the response body?

#include <aws/core/auth/AWSCredentials.h>
#include <aws/ssm/model/GetParametersRequest.h>
#include <aws/ssm/model/GetParametersResult.h>

void getParam(const Aws::SSM::SSMClient& client)
{
    Aws::SSM::Model::GetParametersRequest request;
    request.SetNames({ "/some/config/parameter" });
    request.SetWithDecryption(true);

    request.SetDataSentEventHandler([&request](const Aws::Http::HttpRequest*, long long) {
        std::cout << "Request sent:\n" << request.SerializePayload() << std::endl;
        });
    request.SetDataReceivedEventHandler([](const Aws::Http::HttpRequest*, Aws::Http::HttpResponse* resp, long long) {
        std::cout << "\nResponse body:\n" << resp->GetResponseBody().rdbuf() << std::endl;
        });
    Aws::SSM::Model::GetParametersOutcome result = client.GetParameters(request);
    if (!result.IsSuccess())
    {
        std::cout << "failed : " << result.GetError() << std::endl;
    }
    else
    {
        std::cout << "succeed" << std::endl;
        auto response = result.GetResult();
        auto params = response.GetParameters();
        std::cout << "size : " << params.size() << std::endl;
        for (const auto& r : params)
        {
            std::cout << "name : " << r.GetName() << " value : " << r.GetValue() << std::endl;
        }
    }
}

int main()
{
    Aws::SDKOptions options;
    options.loggingOptions.logLevel = Aws::Utils::Logging::LogLevel::Trace;

    Aws::InitAPI(options);
    {
        Aws::Client::ClientConfiguration configs;
        if (configs.region.empty())
        {
            configs.region = "US_EAST_1";
        }

        Aws::SSM::SSMClient client(configs);

        getParam(client);
    }

    Aws::ShutdownAPI(options);

    return 0;
}

[Mher594]

The issue was in the rdbuf() usage in event handler. I added it to see the response and it was not necessary so removing it fixed the issue.

request.SetDataReceivedEventHandler([](const Aws::Http::HttpRequest*, Aws::Http::HttpResponse* resp, long long) {
    std::cout << "\nResponse body:\n" << resp->GetResponseBody().rdbuf() << std::endl;
});

[github-actions[bot]]

Hello! Reopening this discussion to make it searchable.