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#### Source listing for Daytime.1

    //
    // client.cpp
    // ~~~~~~~~~~
    //
    // Copyright (c) 2003-2011 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 <iostream>
    #include <boost/array.hpp>
    #include <boost/asio.hpp>

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

    int main(int argc, char* argv[])
    {
      try
      {
        if (argc != 2)
        {
          std::cerr << "Usage: client <host>" << std::endl;
          return 1;
        }

        boost::asio::io_service io_service;

        tcp::resolver resolver(io_service);
        tcp::resolver::query query(argv[1], "daytime");
        tcp::resolver::iterator endpoint_iterator = resolver.resolve(query);
        tcp::resolver::iterator end;

        tcp::socket socket(io_service);
        boost::system::error_code error = boost::asio::error::host_not_found;
        while (error && endpoint_iterator != end)
        {
          socket.close();
          socket.connect(*endpoint_iterator++, error);
        }
        if (error)
          throw boost::system::system_error(error);

        for (;;)
        {
          boost::array<char, 128> buf;
          boost::system::error_code error;

          size_t len = socket.read_some(boost::asio::buffer(buf), 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.

          std::cout.write(buf.data(), len);
        }
      }
      catch (std::exception& e)
      {
        std::cerr << e.what() << std::endl;
      }

      return 0;
    }

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