fiber/examples/asio/echo_client.cpp

//
// echo_client.cpp
// ~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com)
// This source is effectively identical to
// http://www.boost.org/doc/libs/release/doc/html/boost_asio/example/cpp03/echo/blocking_tcp_echo_client.cpp
// It does not use Boost.Fiber. It is copied here only for completeness. A
// server needs a client.
//
// 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 <cstring>
#include <iostream>

#include <boost/asio.hpp>

using boost::asio::ip::tcp;

enum {
    max_length = 1024
};

int main( int argc, char* argv[]) {
    try {
        if ( 3 != argc) {
            std::cerr << "Usage: echo_client <host> <port>\n";
            return EXIT_FAILURE;
        }
        boost::asio::io_service io_service;
        tcp::resolver resolver( io_service);
        tcp::resolver::query query( tcp::v4(), argv[1], argv[2]);
        tcp::resolver::iterator iterator = resolver.resolve( query);
        tcp::socket s( io_service);
        boost::asio::connect( s, iterator);
        std::cout << "Enter message: ";
        char request[max_length];
        std::cin.getline( request, max_length);
        size_t request_length = std::strlen( request);
        boost::asio::write( s, boost::asio::buffer( request, request_length) );
        char reply[max_length];
        size_t reply_length = boost::asio::read( s, boost::asio::buffer( reply, request_length) );
        std::cout << "Reply is: ";
        std::cout.write( reply, reply_length);
        std::cout << "\n";
        return EXIT_SUCCESS;
    } catch ( std::exception const& e) {
        std::cerr << "Exception: " << e.what() << "\n";
    }

    return EXIT_FAILURE;
}