访问 REST API 作为 C++ 中的客户端，具有 boost、以太网帧问题

Question

I try to get a JSON from a REST API (blocking is fine for now) using boost::asio::read. The problem I have is that I don't know how to deal if the response consists of multiple ethernet frames. When this is the case and I print the JSON, between the frames there is some "rubbish", I don't know if it is padding or some headers. How do I solve this? How can I know until when I have to read and from where I need to read again? Thanks.

    uint16_t port = 80; //TLS later?
    std::string address = this->hostip_ + ":" + std::to_string(port);

    //resolve address
    boost::asio::ip::tcp::resolver resolver(io_service);
    boost::asio::ip::tcp::resolver::query query(hostip_, std::to_string(port));
    boost::asio::ip::tcp::resolver::iterator endpoint_iterator = resolver.resolve(query);

    //create socket
    boost::asio::ip::tcp::socket socket(io_service);

    try
    {
        boost::asio::connect(socket, endpoint_iterator);
    }
    catch (const std::exception& e)
    {
        std::cout << "Could not connect to API host";
        return false;
    }

    //form the request
    std::string hostAddress = hostip_ + ":" + std::to_string(port);


    boost::asio::streambuf request;
    std::ostream request_stream(&request);
    request_stream << "GET " << restURI_ << " HTTP/1.1\r\n";
    request_stream << "Host: " << hostAddress << "\r\n";
    request_stream << "Accept: */*\r\n";
    request_stream << "Connection: close\r\n\r\n";

    //send the request
    boost::asio::write(socket, request);

    //read the full response
    boost::asio::streambuf response;
    boost::system::error_code error;



    while (boost::asio::read(socket, response,boost::asio::transfer_at_least(1), error));
    
    //convert to string
    boost::asio::streambuf::const_buffers_type buf = response.data();
    const std::string bufferstr(boost::asio::buffers_begin(buf), boost::asio::buffers_begin(buf) + response.size());

Answer 1

仅使用 C++11 和 Boost.Asio 即可使用Boost.Beast 、Portable HTTP、WebSocket 和网络操作！