Problems using boost :: asio :: async_read ()

Question

Here is the code I'm using:

class Server
{
.....

void Server::accepted()
{
    std::cout << "Accepted!" << std::endl;

    boost::array<char, 1> buf;
    boost::asio::async_read(socket, boost::asio::buffer(buf),
        boost::bind(&Server::handleRead, this, buf, boost::asio::placeholders::error));
}

void Server::handleRead(boost::array<char, 1> buf, const boost::system::error_code& error)
{
    if(!error)
    {
        std::cout << "Message: " << buf.data() << std::endl;
    }
    else
    {
        std::cout << "Error occurred." << std::endl;
    }
}

.....
}

The problem is that I always get the same data from the client: a specific char. In my client, I tried to send another char, but still the server shows the same char.

And when I try to read more than 1 byte, I get an error that a variable is used before it is initialized buf.

Answer 1

buf, . , . . - :

class Server
{
.....

boost::array<char, 1> buf;

void Server::accepted()
{
    std::cout << "Accepted!" << std::endl;

    boost::asio::async_read(socket, boost::asio::buffer(buf),
        boost::bind(&Server::handleRead, this, boost::asio::placeholders::error));
}

void Server::handleRead(const boost::system::error_code& error)
{
    if(!error)
    {
        std::cout << "Message: " << buf.data() << std::endl;
    }
    else
    {
        std::cout << "Error occurred." << std::endl;
    }
}

.....
}

: , , ( , , ):

void Server::accepted()
{
    std::cout << "Accepted!" << std::endl;

    boost::shared_ptr<boost::array<char, 1>> buf(new boost::array<char, 1>);

    boost::asio::async_read(socket, boost::asio::buffer(*buf),
        boost::bind(&Server::handleRead, this, buf, boost::asio::placeholders::error));
}

void Server::handleRead(boost::shared_ptr<boost::array<char, 1>> buf, const boost::system::error_code& error)
{
    if(!error)
    {
        std::cout << "Message: " << buf->data() << std::endl;
    }
    else
    {
        std::cout << "Error occurred." << std::endl;
    }
}