C++ 网络编程入门：使用 Boost.Asio 实现简易客户端

C++ 网络编程入门：使用 Boost.Asio 实现简易客户端

Boost.Asio 是跨平台网络库，支持同步和异步操作。

同步 HTTP GET 请求

#include <boost/asio.hpp>

#include <iostream>



using boost::asio::ip::tcp;



int main() {

    boost::asio::io_context io;

    tcp::resolver resolver(io);

    tcp::socket socket(io);



    auto endpoints = resolver.resolve('httpbin.org', '80');

    boost::asio::connect(socket, endpoints);



    std::string request = 'GET /get HTTP/1.1\r\nHost: httpbin.org\r\nConnection: close\r\n\r\n';

    boost::asio::write(socket, boost::asio::buffer(request));



    boost::asio::streambuf response;

    boost::asio::read_until(socket, response, '\r\n\r\n');



    std::istream response_stream(&response);

    std::string header;

    while (std::getline(response_stream, header) && header != '\r') {}



    std::cout << 'Response received' << std::endl;

    return 0;

}

异步示例

socket.async_connect(endpoints, [&](boost::system::error_code ec) {

    if (!ec) {

        socket.async_write_some(boost::asio::buffer(request), callback);

    }

});

io.run();

Boost.Asio 是 C++ 高性能网络编程的基础库。