what causes the Assertion failed: (GetHttpClientFactory()), function CreateHttpRequest, file HttpClientFactory.cpp, line 199.

[Mr-nightskycoder]

I am trying to List all the objects stored in a specific S3 bucket. I am not using the TransferManager instead I am using that logic and writing my own code.

int main(int, char*[])
{

    Aws::SDKOptions options;
    Aws::InitAPI(options);
    {
        const Aws::String bucket_name = "xxx-net";
        Aws::String region = "us-east-1";
        //Chimera::ReadAWSBucket readAWSObjFromBucket;
        //if(!readAWSObjFromBucket.ListObjects(bucket_name, region)) {
        //    return 1;
        //}

        auto s3_file_transfer_manager_obj = std::make_shared<S3FileTransferManager>();
        s3_file_transfer_manager_obj->ListObjects("/",bucket_name, "s3");
    }
    Aws::ShutdownAPI(options);
    return 0;
}

public:
            std::shared_ptr<Aws::S3::S3Client> s3_client;
            S3FileTransferManager() {
                  std::cout << "Hello from constructor" << std::endl;
                  Aws::String region = "us-east-1";
                  Aws::Client::ClientConfiguration config;
                  config.connectTimeoutMs = 30000;
                  config.requestTimeoutMs = 30000;
                  //config.scheme = Aws::Http::Scheme::HTTPS;
                  if (!region.empty()) {
                      config.region = region;
                  }
                  const char* AWS_ACCESS_KEY_ID = "xxx";
                  const char* AWS_SECRET_ACCESS_KEY = "xxx";
                  const Aws::String bucket_name = "xxx-net";
                  Aws::Auth::AWSCredentials credentials(AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY);
                  Aws::S3::S3Client s3Client(credentials, config);
                  s3_client = std::make_shared<Aws::S3::S3Client>(s3Client);
            }

void S3FileTransferManager::ListObjects(const Aws::String& directory, const Aws::String& bucketName, const Aws::String& prefix) 
{
    // This self needs to be checked.
    auto self = shared_from_this();

    auto handler = [self](  const Aws::S3::S3Client* client, 
                            const Aws::S3::Model::ListObjectsV2Request& request, 
                            const Aws::S3::Model::ListObjectsV2Outcome& outcome,
                            const std::shared_ptr<const Aws::Client::AsyncCallerContext>& context
                        ) {
                            self->HandleListObjectsResponse(client, request, outcome, context);
                        };

    
    Aws::S3::Model::ListObjectsV2Request request;
    request.WithBucket(bucketName).WithPrefix("topics/llll");

    s3_client->ListObjectsV2Async(request, handler);


}

void S3FileTransferManager::HandleListObjectsResponse( const Aws::S3::S3Client* client,
                                                                const Aws::S3::Model::ListObjectsV2Request& request,
                                                                const Aws::S3::Model::ListObjectsV2Outcome& outcome,
                                                                const std::shared_ptr<const Aws::Client::AsyncCallerContext>& context) 
{
    auto self = shared_from_this();
    auto handler = [self](const Aws::S3::S3Client* client, 
                          const Aws::S3::Model::ListObjectsV2Request& lambdaRequest,
                          const Aws::S3::Model::ListObjectsV2Outcome& lambdaOutcome,
                          const std::shared_ptr<const Aws::Client::AsyncCallerContext>& lambdaContext) {
                              self->HandleListObjectsResponse(client, lambdaRequest, lambdaOutcome, lambdaContext);
                          };

    
    if(outcome.IsSuccess()) {
        Aws::S3::Model::ListObjectsV2Request requestCopy = request;
        auto& result = outcome.GetResult();
    

        if(result.GetIsTruncated()) {
            requestCopy.SetContinuationToken(result.GetContinuationToken());
            client->ListObjectsV2Async(requestCopy, handler);
        }
        for (auto&  content : result.GetContents()) {
            std::cout << content.GetKey() << std::endl;
        }
    }


}```

What is the context ```std::shared_ptr<const Aws::Client::AsyncCallerContext>&```???

Please help. why the above code is not working?

[jmklix]

Is there a reason that you are trying to do this on your own? Does TransferManager not work for you?

[Mr-nightskycoder]

It works. Just for my learning so I can slowly start contributing to AWS SDK

[Mr-nightskycoder]

Transfer Manager works. But I am trying to understand how to use S3 SDK code to write this by myself

[jmklix]

Have you taken a look at the example: list_objects.cpp

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Hello! Reopening this discussion to make it searchable.