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