fiber/examples/cpp03/asio/publish_subscribe/subscriber.cpp

//
// blocking_tcp_echo_client.cpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2013 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 <cstring>
#include <iostream>

#include <boost/asio.hpp>
#include <boost/date_time/posix_time/posix_time_types.hpp>
#include <boost/thread.hpp>

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

enum { max_length = 1024 };

int main(int argc, char* argv[])
{
  try
  {
    if (argc != 3)
    {
      std::cerr << "Usage: subscriber <host> <channel>\n";
      return 1;
    }

    boost::asio::io_service io_service;

    tcp::resolver resolver(io_service);
    tcp::resolver::query query(tcp::v4(), argv[1], "9998");
    tcp::resolver::iterator iterator = resolver.resolve(query);

    tcp::socket s(io_service);
    boost::asio::connect(s, iterator);

    char msg[max_length];
    std::string channel(argv[2]);
    std::memset(msg, '\0', max_length);
    std::memcpy(msg, channel.c_str(), channel.size() );
    boost::asio::write(s, boost::asio::buffer(msg, max_length));

    for (;;)
    {
        char reply[max_length];
        size_t reply_length = boost::asio::read(s,
                boost::asio::buffer(reply, max_length));
        std::cout << "published: ";
        std::cout.write(reply, reply_length);
        std::cout << std::endl;
    }
  }
  catch (std::exception const& e) 
  {
    std::cerr << "Exception: " << e.what() << "\n";
  }

  return 0;
}