c++ - boost asio 中具有异步功能的坏字符

Question

我在 boost::asio 中遇到数据传输问题。 使用以下代码:

服务器.cpp

void        Server::accept(void)
{
    Network::ptr connection = Network::create(this->my_acceptor.get_io_service());
    this->my_acceptor.async_accept(connection->getSocket(), bind(&Server::endCmd, this, connection, placeholders::error));
}

void        Server::endCmd(Network::ptr connection, const boost::system::error_code& error)
{
    if (!error)
        {
            connection->Swrite("BIENVENUE");
            this->accept();
        }
}

网络.cpp

void        Network::Sread(void)
{
    async_read(this->socket, buffer(this->rbuffer), bind(&Network::endRead, shared_from_this(), placeholders::error));
}

void            Network::endRead(const error_code& error)
{
    if (!error)
        {
            this->rcv_msg = this->rbuffer.c_array();
            std::cout << this->rcv_msg << std::endl;
            this->Sread();
        }
}

void            Network::Swrite(std::string msg)
{
    this->msg = msg;
    async_write(this->socket, buffer(this->msg, (int)this->msg.size()), bind(&Network::endWrite, shared_from_this(), placeholders::error));
}

void            Network::endWrite(const error_code &error)
{
    if (!error)
    {
        this->Sread();
    }
}

tcp::socket&    Network::getSocket(void)
{
    return (this->socket);
}

Network::ptr                Network::create(io_service &ios)
{
    return (ptr(new Network(ios)));
}

当我用 telnet 向服务器发送类似“Hello world”的字符串时，他写入以下内容:

谁能告诉我为什么服务器写了很多未知字符？

Answer 1

我相信您的 readHandler (Network::endRead()) 缺少参数。无法确定从流中读取了多少字节。我的回调通常是这样的(但我调用了 async_read_some()):

void HandleAsioRead(const boost::system::error_code& rErrorCode,
                    std::size_t nBytesTransferred)

然后我会在打印之前空终止我从流中读取的字符串。

编辑: 我对 async_read_some() 的调用如下所示:

    m_Socket.async_read_some(
        asio::buffer(m_RawBuffer, MaxBufferSize),
        bind(&HandleAsioRead,
             this,
             asio::placeholders::error,
             asio::placeholders::bytes_transferred));