Boost async_read

Question

我正在嘗試創建一個TCP服務器，其中Start（）方法阻塞，直到接受連接，然後開始一系列異步讀取。我有以下的代碼，當我連接使用telnet我得到這樣的輸出：

等待

連接已接受

一個新的連接終止叫做拋出exceptionAbort陷阱：6

這裏是代碼：

void SocketReadThread::Start() 
{ 
    bzero(m_headerBuffer, HEADER_LEN); 
    m_running = true; 

    asio::io_service ios; 
    asio::ip::tcp::acceptor acp (ios, 
     boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v4(), GUI_PORT)); 

    asio::ip::tcp::socket sock(ios); 
    std::cout << "Waiting for a new connection" << std::endl; 

    acp.accept(sock); 
    std::cout << "Connection accepted" << std::endl; 

    asio::async_read(sock, asio::buffer(m_headerBuffer, HEADER_LEN), 
     boost::bind(&SocketReadThread::handleReadHeader, shared_from_this(), 
     asio::placeholders::error)); 

    ios.run(); 
} 

void SocketReadThread::handleReadHeader(const system::error_code& error) 
{ 
    std::cout << "Read two bytes!" << std::endl; 
} 

Answer 1

通過錯誤地聲明ReadHandler，你可能會對堆棧做一些可怕的事情（而且太棒了）。即使您忽略了一些參數，簽名也必須如下：

void handler (
    const boost::system::error_code& error, // Result of operation. 

    std::size_t bytes_transferred   // Number of bytes copied into the 
              // buffers. If an error occurred, 
              // this will be the number of 
              // bytes successfully transferred 
              // prior to the error. 
); 

Answer 2

您應該將main()功能包裝在try {...} catch (std::exception& e) { cout << e.what(); }區塊中。