c++ - boost asio 读缓冲区

Question

我的问题是，当您不知道消息大小时，读取 boost tcp 套接字的最佳方法是什么？这是一个样本。我简单地设置了 10 的大小。 代码位于不同的 header 中，但我认为不需要全部包含

/////////////hpp

typedef boost::asio::ip::tcp::resolver TResolver;
typedef boost::asio::ip::tcp::resolver::query TResolverQuery;
typedef boost::asio::ip::tcp::endpoint Tendpoint;
typedef boost::asio::ip::tcp::socket Tsocket;
typedef boost::asio::ip::tcp::acceptor Tacceptor;
#define Tsize 10

/////////////cpp

while(true)
{
    cout<<"recieve"<<endl;
    boost::shared_ptr< Tacceptor > acceptor(new boost::asio::ip::tcp::acceptor(*m_io_service));
    boost::system::error_code ec;
    TResolverQuery query(this->getHost(), boost::lexical_cast< std::string >( this->getPort() ));
    TResolver resolver( *m_io_service );
    Tendpoint endpoint = *resolver.resolve( query );
    acceptor->open( endpoint.protocol() );
    acceptor->set_option( boost::asio::ip::tcp::acceptor::reuse_address( true ) );
    acceptor->bind( endpoint );
    acceptor->listen();
    boost::shared_ptr< Tsocket > socknew(new Tsocket( *m_io_service ));
    acceptor->accept( *socknew,endpoint);
    boost::array<char, Tsize> buf;
    boost::asio::read(*socknew,boost::asio::buffer(buf), ec);
    cout.write(buf.data(),Tsize);cout << std::endl;
    socknew->shutdown( boost::asio::ip::tcp::socket::shutdown_both, ec );
    cout<<"threadId "<< boost::this_thread::get_id()<<endl;        
}

Answer 1

两种最常见的方法是使用包含消息长度或具有消息结束标记的协议(protocol)。