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//
// daytime_client.cpp
// ~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2018 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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