| // |
| // client.cpp |
| // ~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2010 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; |
| } |