Boost asio send and receive messages

问题

I'm trying to send and receive messages from a client and server using TCP. I'm trying it with threading, and I don't know how to do this at all. I can connect to the server just fine, but I need to be able to send and receive messages from both places on demand. I've been searching for hours and have come up empty, as all of the results on Google are overcomplicated and cluttering.

struct Client
{
boost::asio::ip::tcp::socket socket;

Client(const char* host = HOST, const char* port = PORT) : socket(io_service) 
{
    boost::asio::ip::tcp::resolver resolver(io_service);
    boost::asio::ip::tcp::resolver::iterator endpoint = resolver.resolve(boost::asio::ip::tcp::resolver::query(HOST, PORT));
    boost::asio::connect(this->socket, endpoint);
   };
};

That's all I have so far for the client.

For the server:

const int PORT = 52275;

int main()
{
    try
{
    boost::asio::io_service io_service;
    boost::asio::ip::tcp::acceptor acceptor(io_service, boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v4(), PORT));

    {
        boost::asio::ip::tcp::socket socket(io_service);
        acceptor.accept(socket);
        main();
    }
}
catch (std::exception& e)
{
    std::cerr << "Exception: " << e.what() << std::endl;
}
}

回答1:

Since it's apparently safe to assume you just want to send /any/ message by the simplest means possible:

Live On Coliru

#include <boost/asio.hpp>

struct Client
{
    boost::asio::io_service& io_service;
    boost::asio::ip::tcp::socket socket;

    Client(boost::asio::io_service& svc, std::string const& host, std::string const& port) 
        : io_service(svc), socket(io_service) 
    {
        boost::asio::ip::tcp::resolver resolver(io_service);
        boost::asio::ip::tcp::resolver::iterator endpoint = resolver.resolve(boost::asio::ip::tcp::resolver::query(host, port));
        boost::asio::connect(this->socket, endpoint);
    };

    void send(std::string const& message) {
        socket.send(boost::asio::buffer(message));
    }
};


#include <iostream>

static const int PORT = 52275;

void client_thread() {
    boost::asio::io_service svc;
    Client client(svc, "127.0.0.1", std::to_string(PORT));

    client.send("hello world\n");
    client.send("bye world\n");
}

void server_thread() {
    try
    {
        boost::asio::io_service io_service;
        boost::asio::ip::tcp::acceptor acceptor(io_service, boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v4(), PORT));

        {
            boost::asio::ip::tcp::socket socket(io_service);
            acceptor.accept(socket);

            boost::asio::streambuf sb;
            boost::system::error_code ec;
            while (boost::asio::read(socket, sb, ec)) {
                std::cout << "received: '" << &sb << "'\n";

                if (ec) {
                    std::cout << "status: " << ec.message() << "\n";
                    break;
                }
            }
        }
    }
    catch (std::exception& e)
    {
        std::cerr << "Exception: " << e.what() << std::endl;
    }
}

#include <boost/thread.hpp>

int main() {
    boost::thread_group tg;
    tg.create_thread(server_thread);

    boost::this_thread::sleep_for(boost::chrono::milliseconds(100));
    tg.create_thread(client_thread);

    tg.join_all();
}

来源：https://stackoverflow.com/questions/27672591/boost-asio-send-and-receive-messages

标签

boost

boost-asio