Method do_read

example/cpp11/local/stream_server.cpp:36–45

private:
  void do_read()
  {
    auto self(shared_from_this());
    socket_.async_read_some(boost::asio::buffer(data_),
        [this, self](boost::system::error_code ec, std::size_t length)
        {
          if (!ec)
            do_write(length);
        });
  }

  void do_write(std::size_t length)
  {