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- //
- // blocking_tcp_echo_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 <cstdlib>
- #include <iostream>
- #include <thread>
- #include <utility>
- #include <boost/asio.hpp>
- using boost::asio::ip::tcp;
- const int max_length = 1024;
- void session(tcp::socket sock)
- {
- try
- {
- for (;;)
- {
- char data[max_length];
- boost::system::error_code error;
- size_t length = sock.read_some(boost::asio::buffer(data), error);
- if (error == boost::asio::error::eof)
- break; // Connection closed cleanly by peer.
- else if (error)
- throw boost::system::system_error(error); // Some other error.
- boost::asio::write(sock, boost::asio::buffer(data, length));
- }
- }
- catch (std::exception& e)
- {
- std::cerr << "Exception in thread: " << e.what() << "\n";
- }
- }
- void server(boost::asio::io_context& io_context, unsigned short port)
- {
- tcp::acceptor a(io_context, tcp::endpoint(tcp::v4(), port));
- for (;;)
- {
- std::thread(session, a.accept()).detach();
- }
- }
- int main(int argc, char* argv[])
- {
- try
- {
- if (argc != 2)
- {
- std::cerr << "Usage: blocking_tcp_echo_server <port>\n";
- return 1;
- }
- boost::asio::io_context io_context;
- server(io_context, std::atoi(argv[1]));
- }
- catch (std::exception& e)
- {
- std::cerr << "Exception: " << e.what() << "\n";
- }
- return 0;
- }
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