我如何使用带有共享指针的 Boost Asio 来解决这个 "Network connection aborted by local system"？

Question

我正在尝试使用来自 Boost 1.60 的 Asio 使用几个不同的示例编写 TCP 客户端。连接正常工作大约 30 秒左右，但因错误而断开连接：

The network connection was aborted by the local system

我已尝试设置 "ping/pong" 设置以保持连接有效，但它仍然终止。我发现的唯一一个 Stack Overflow 答案建议使用 Boost 的 shared_from_this 和一个共享指针，我已经修改了我的代码以供使用。但是问题依旧。

设置连接对象及其线程：

    boost::asio::io_service ios;

    boost::asio::ip::tcp::resolver res(ios);
    boost::shared_ptr<Connection> conn = boost::shared_ptr<Connection>(new Connection(ios));

    conn->Start(res.resolve(boost::asio::ip::tcp::resolver::query("myserver", "10635")));

    boost::thread t(boost::bind(&boost::asio::io_service::run, &ios));

这里是连接 class 的相关部分（我确保在其他地方也使用 shared_from_this()）：

class Connection : public boost::enable_shared_from_this<Connection>
{
public:
  Connection(boost::asio::io_service &io_service)
    : stopped_(false),
      socket_(io_service),
      deadline_(io_service),
      heartbeat_timer_(io_service)
  {
  }

  void Start(tcp::resolver::iterator endpoint_iter)
  {
    start_connect(endpoint_iter);

    deadline_.async_wait(boost::bind(&Connection::check_deadline, shared_from_this()));
  }

private:


  void start_read()
  {
    deadline_.expires_from_now(boost::posix_time::seconds(30));

    boost::asio::async_read_until(socket_, input_buffer_, 0x1f,
        boost::bind(&Connection::handle_read, shared_from_this(), _1));
  }

  void handle_read(const boost::system::error_code& ec)
  {
    if (stopped_)
      return;

    if (!ec)
    {
      std::string line;
      std::istream is(&input_buffer_);
      std::getline(is, line);

      if (!line.empty())
      {
        std::cout << "Received: " << line << "\n";
      }

      start_read();
    }
    else
    {
// THIS IS WHERE THE ERROR IS LOGGED
      std::cout << "Error on receive: " << ec.message() << "\n";

      Stop();
    }
  }

  void check_deadline()
  {
    if (stopped_)
      return;

    if (deadline_.expires_at() <= deadline_timer::traits_type::now())
    {
      socket_.close();
      deadline_.expires_at(boost::posix_time::pos_infin);
    }

    deadline_.async_wait(boost::bind(&Connection::check_deadline, shared_from_this()));
  }
};

Answer 1

原来问题出在服务器端。服务器未正确发送 "pong" 对客户端 ping 的响应，因此 async_read_until() 调用从未完成，因此从未重置截止时间计时器。

我如何使用带有共享指针的 Boost Asio 来解决这个 "Network connection aborted by local system"？

How can I get around this "Network connection aborted by local system" using Boost Asio with a shared pointer?

c++

boost

shared-ptr

boost-asio