How to get the boost::asio::async_read to return when the terminating character is reached

i'm using boost asio library to read the content from the tcp socket. My code looks like this

std::string completeBuffer="";
std::string TcpConnection::readMessage()
{
    LOG4CPLUS_DEBUG(logger, "Start Listener for Reading Message from Connection");
    boost::system::error_code error;
    boost::asio::async_read(socket, boost::asio::buffer(buffer),
        boost::bind(&TcpConnection::handleRead, this, buffer, boost::asio::placeholders::error));
    return buffer.data();
}

void TcpConnection::handleRead(boost::array<char, TcpConnection::BUFFER_SIZE> buf, const boost::system::error_code& error)
{
    if(!error)
    {
       LOG4CPLUS_INFO(logger, "READ Message " << buf.data());
       compl开发者_C百科eteBuffer.append(buf.data());
       buf.assign(0);
       readMessage();
    }

}

Now i'm making the call from some other class to readMessage(). whenever the BUFFER_SIZE is reached the handleRead gets called and the content gets appended.

now the question is say the BUFFER_SIZE is 50, and the whole message size is 75, handleRead is called only once and the buffer waits to be filled for the handleRead to be called for the second time. Is there a way to set the EOM character or string for asio to return whenever its reached.

Found the answer async_read_until