C++如何实现网络通信 C++网络通信的简单实现方法

#include <iostream>
#include <string>
#include <asio.hpp>

using asio::ip::tcp;

int main() {
    try {
        asio::io_context io_context;
        tcp::acceptor acceptor(io_context, tcp::endpoint(tcp::v4(), 12345)); // 监听12345端口

        std::cout << "Server listening on port 12345..." << std::endl;

        for (;;) {
            tcp::socket socket(io_context);
            acceptor.accept(socket);

            std::cout << "Client connected." << std::endl;

            std::string message = "Hello from server!";
            asio::error_code ignored_error;
            asio::write(socket, asio::buffer(message), ignored_error); // 发送消息

            socket.close();
            std::cout << "Client disconnected." << std::endl;
        }
    } catch (std::exception& e) {
        std::cerr << "Exception: " << e.what() << std::endl;
    }

    return 0;
}

#include <iostream>
#include <string>
#include <asio.hpp>

using asio::ip::tcp;

int main() {
    try {
        asio::io_context io_context;
        tcp::socket socket(io_context);
        socket.connect(tcp::endpoint(asio::ip::address::from_string("127.0.0.1"), 12345)); // 连接服务器

        std::cout << "Connected to server." << std::endl;

        asio::streambuf buffer;
        asio::read_until(socket, buffer, '\0'); // 读取直到遇到空字符

        std::istream input_stream(&buffer);
        std::string message;
        std::getline(input_stream, message, '\0');

        std::cout << "Received: " << message << std::endl;

    } catch (std::exception& e) {
        std::cerr << "Exception: " << e.what() << std::endl;
    }

    return 0;
}