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- //
- // server.cpp
- // ~~~~~~~~~~
- //
- // Copyright (c) 2003-2019 Christopher M. Kohlhoff (chris at kohlhoff dot com)
- //
- // Distributed under the Boost Software License, Version 1.0. (See accompanying
- // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- //
- #include <ctime>
- #include <iostream>
- #include <string>
- #include <boost/bind.hpp>
- #include <boost/shared_ptr.hpp>
- #include <boost/enable_shared_from_this.hpp>
- #include <boost/asio.hpp>
- using boost::asio::ip::tcp;
- std::string make_daytime_string()
- {
- using namespace std; // For time_t, time and ctime;
- time_t now = time(0);
- return ctime(&now);
- }
- class tcp_connection
- : public boost::enable_shared_from_this<tcp_connection>
- {
- public:
- typedef boost::shared_ptr<tcp_connection> pointer;
- static pointer create(boost::asio::io_context& io_context)
- {
- return pointer(new tcp_connection(io_context));
- }
- tcp::socket& socket()
- {
- return socket_;
- }
- void start()
- {
- message_ = make_daytime_string();
- boost::asio::async_write(socket_, boost::asio::buffer(message_),
- boost::bind(&tcp_connection::handle_write, shared_from_this(),
- boost::asio::placeholders::error,
- boost::asio::placeholders::bytes_transferred));
- }
- private:
- tcp_connection(boost::asio::io_context& io_context)
- : socket_(io_context)
- {
- }
- void handle_write(const boost::system::error_code& /*error*/,
- size_t /*bytes_transferred*/)
- {
- }
- tcp::socket socket_;
- std::string message_;
- };
- class tcp_server
- {
- public:
- tcp_server(boost::asio::io_context& io_context)
- : io_context_(io_context),
- acceptor_(io_context, tcp::endpoint(tcp::v4(), 13))
- {
- start_accept();
- }
- private:
- void start_accept()
- {
- tcp_connection::pointer new_connection =
- tcp_connection::create(io_context_);
- acceptor_.async_accept(new_connection->socket(),
- boost::bind(&tcp_server::handle_accept, this, new_connection,
- boost::asio::placeholders::error));
- }
- void handle_accept(tcp_connection::pointer new_connection,
- const boost::system::error_code& error)
- {
- if (!error)
- {
- new_connection->start();
- }
- start_accept();
- }
- boost::asio::io_context& io_context_;
- tcp::acceptor acceptor_;
- };
- int main()
- {
- try
- {
- boost::asio::io_context io_context;
- tcp_server server(io_context);
- io_context.run();
- }
- catch (std::exception& e)
- {
- std::cerr << e.what() << std::endl;
- }
- return 0;
- }
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