boost::asio 的daytime客户端和服务器实例

来源：互联网发布：mac number 求和编辑：程序博客网时间：2024/05/17 07:09

1. 服务器端

server.h

#include <boost/asio.hpp>#include <boost/array.hpp>using boost::asio::ip::tcp;using namespace boost::asio;#include <memory>#include <utility>#include <vector>#include <ctime>#include <iostream>// A reference-counted non-modifiable buffer class.//buffer类，用来保存要发送的消息。class shared_const_buffer{public:    // Construct from a std::string.    explicit shared_const_buffer(const std::string& data)        : data_(new std::vector<char>(data.begin(), data.end())),        buffer_(boost::asio::buffer(*data_))    {    }    // Implement the ConstBufferSequence requirements.    typedef boost::asio::const_buffer value_type;    typedef const boost::asio::const_buffer* const_iterator;    const boost::asio::const_buffer* begin() const { return &buffer_; }    const boost::asio::const_buffer* end() const { return &buffer_ + 1; }private:    std::shared_ptr<std::vector<char> > data_;    boost::asio::const_buffer buffer_;};//处理socketclass Session:public std::enable_shared_from_this<Session>{public:    Session(tcp::socket socket) :        m_socket(std::move(socket)){}    void start(){        std::cout << "connect" << std::endl;        do_write();  //框架内部，可修改问其他服务器的功能。    }private:    void do_write(){        std::time_t now = std::time(0);        shared_const_buffer buffer(std::ctime(&now));        auto self(shared_from_this());        boost::asio::async_write(m_socket, buffer,            [this, self](boost::system::error_code /*ec*/, std::size_t /*length*/)        {        });    }private:    tcp::socket m_socket;};//服务器主程序，循环异步分发socket事件。class Server{public:    Server(io_service &ios, short port) :        m_acceptor(ios, tcp::endpoint(tcp::v4(), port)),        m_socket(ios)    {        do_accept();    }private:    void do_accept(){        m_acceptor.async_accept(m_socket,            [this](boost::system::error_code ec){            if (!ec){                std::make_shared<Session>(std::move(m_socket))->start();            }            do_accept();  //循环        });    }private:    tcp::socket m_socket;    tcp::acceptor m_acceptor;};

main.cpp

#include <boost/asio.hpp>using namespace boost::asio;#include "server.h"int main(){    io_service ios;    int port = 6677;    Server server(ios, port);    ios.run();    return 0;}

2. 客户端

main.cpp

//stl#include <iostream>//boost#include <boost/asio.hpp>#include <boost/array.hpp>int main(int argc, char **argv){    boost::asio::io_service ios;    boost::asio::ip::tcp::socket socket(ios);    //连接    boost::asio::ip::tcp::resolver resolver(ios);    auto endpoint_iterator = resolver.resolve({ "127.0.0.1", "6677" });    boost::asio::connect(socket, endpoint_iterator);    for (;;){        boost::array<char, 128> buf;        boost::system::error_code error;        size_t len = socket.read_some(boost::asio::buffer(buf), error);  //读取数据        if (error == boost::asio::error::eof)            break; // Connection closed cleanly by peer.        else if (error)            throw boost::system::system_error(error); // Some other error.        std::cout.write(buf.data(), len);    }}

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