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- //
- // daytime_client.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 <boost/asio.hpp>
- #include <boost/bind.hpp>
- #include <iostream>
- #include "logger.hpp"
- using boost::asio::ip::tcp;
- char read_buffer[1024];
- void read_handler(const boost::system::error_code& e,
- std::size_t bytes_transferred, tcp::socket* s)
- {
- if (!e)
- {
- std::cout.write(read_buffer, bytes_transferred);
- s->async_read_some(boost::asio::buffer(read_buffer),
- boost::bind(read_handler, boost::asio::placeholders::error,
- boost::asio::placeholders::bytes_transferred, s));
- }
- else
- {
- services::logger logger(s->get_executor().context(), "read_handler");
- std::string msg = "Read error: ";
- msg += e.message();
- logger.log(msg);
- }
- }
- void connect_handler(const boost::system::error_code& e, tcp::socket* s)
- {
- services::logger logger(s->get_executor().context(), "connect_handler");
- if (!e)
- {
- logger.log("Connection established");
- s->async_read_some(boost::asio::buffer(read_buffer),
- boost::bind(read_handler, boost::asio::placeholders::error,
- boost::asio::placeholders::bytes_transferred, s));
- }
- else
- {
- std::string msg = "Unable to establish connection: ";
- msg += e.message();
- logger.log(msg);
- }
- }
- int main(int argc, char* argv[])
- {
- try
- {
- if (argc != 2)
- {
- std::cerr << "Usage: daytime_client <host>" << std::endl;
- return 1;
- }
- boost::asio::io_context io_context;
- // Set the name of the file that all logger instances will use.
- services::logger logger(io_context, "");
- logger.use_file("log.txt");
- // Resolve the address corresponding to the given host.
- tcp::resolver resolver(io_context);
- tcp::resolver::results_type endpoints =
- resolver.resolve(argv[1], "daytime");
- // Start an asynchronous connect.
- tcp::socket socket(io_context);
- boost::asio::async_connect(socket, endpoints,
- boost::bind(connect_handler,
- boost::asio::placeholders::error, &socket));
- // Run the io_context until all operations have finished.
- io_context.run();
- }
- catch (std::exception& e)
- {
- std::cerr << e.what() << std::endl;
- }
- return 0;
- }
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