void deliver(const chat_message& msg)
{
bool write_in_progress = !write_msgs_.empty();
write_msgs_.push_back(msg);
if (true)
{
boost::asio::async_write(socket_,
boost::asio::buffer(write_msgs_.front().data(),
write_msgs_.front().length()),
boost::bind(&chat_session::handle_write, shared_from_this(),
boost::asio::placeholders::error));
}
}

void getthread()
{
    boost::asio::io_service io_service;
    char line[chat_message::max_body_length + 1];
    chat_room room_;
    chat_session_ptr new_session(new chat_session(io_service, room_));
    while (std::cin.getline(line, chat_message::max_body_length + 1))
    {
        using namespace std; // For strlen and memcpy.
        chat_message msg;
        msg.body_length(strlen(line));
        memcpy(msg.body(), line, msg.body_length());
        msg.encode_header();
        new_session->deliver(msg);
    }
}
int main(int argc, char* argv[])
{
    try
    {
        if (argc < 2)
        {
            std::cerr << "Usage: chat_server <port> [<port> ...]\n";
            return 1;
        }
        boost::asio::io_service io_service;
        boost::thread t(boost::bind(getthread));
        chat_server_list servers;
        for (int i = 1; i < argc; ++i)
        {
            using namespace std; // For atoi.
            tcp::endpoint endpoint(tcp::v4(), atoi(argv[i]));
            chat_server_ptr server(new chat_server(io_service, endpoint));
            servers.push_back(server);
        }

        io_service.run();
        t.join();
    }
    catch (std::exception& e)
    {
        std::cerr << "Exception: " << e.what() << "\n";
    }
    return 0;
}

this is modified code of chat in Boost sample. I need to display from client in the server and msg from server in the client.
i Can send from client to server but wen i write from server, client does not read the message send. How to solve it?