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//
// client.cpp
// ~~~~~~~~~~
//
// Copyright (c) 2003-2008 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 <vector>
#include "connection.hpp" // Must come before boost/serialization headers.
#include <boost/serialization/vector.hpp>
#include "stock.hpp"
namespace s11n_example {
/// Downloads stock quote information from a server.
class client
{
public:
/// Constructor starts the asynchronous connect operation.
client(boost::asio::io_service& io_service,
const std::string& host, const std::string& service)
: connection_(io_service)
{
// Resolve the host name into an IP address.
boost::asio::ip::tcp::resolver resolver(io_service);
boost::asio::ip::tcp::resolver::query query(host, service);
boost::asio::ip::tcp::resolver::iterator endpoint_iterator =
resolver.resolve(query);
boost::asio::ip::tcp::endpoint endpoint = *endpoint_iterator;
// Start an asynchronous connect operation.
connection_.socket().async_connect(endpoint,
boost::bind(&client::handle_connect, this,
boost::asio::placeholders::error, ++endpoint_iterator));
}
/// Handle completion of a connect operation.
void handle_connect(const boost::system::error_code& e,
boost::asio::ip::tcp::resolver::iterator endpoint_iterator)
{
if (!e)
{
// Successfully established connection. Start operation to read the list
// of stocks. The connection::async_read() function will automatically
// decode the data that is read from the underlying socket.
connection_.async_read(stocks_,
boost::bind(&client::handle_read, this,
boost::asio::placeholders::error));
}
else if (endpoint_iterator != boost::asio::ip::tcp::resolver::iterator())
{
// Try the next endpoint.
connection_.socket().close();
boost::asio::ip::tcp::endpoint endpoint = *endpoint_iterator;
connection_.socket().async_connect(endpoint,
boost::bind(&client::handle_connect, this,
boost::asio::placeholders::error, ++endpoint_iterator));
}
else
{
// An error occurred. Log it and return. Since we are not starting a new
// operation the io_service will run out of work to do and the client will
// exit.
std::cerr << e.message() << std::endl;
}
}
/// Handle completion of a read operation.
void handle_read(const boost::system::error_code& e)
{
if (!e)
{
// Print out the data that was received.
for (std::size_t i = 0; i < stocks_.size(); ++i)
{
std::cout << "Stock number " << i << "\n";
std::cout << " code: " << stocks_[i].code << "\n";
std::cout << " name: " << stocks_[i].name << "\n";
std::cout << " open_price: " << stocks_[i].open_price << "\n";
std::cout << " high_price: " << stocks_[i].high_price << "\n";
std::cout << " low_price: " << stocks_[i].low_price << "\n";
std::cout << " last_price: " << stocks_[i].last_price << "\n";
std::cout << " buy_price: " << stocks_[i].buy_price << "\n";
std::cout << " buy_quantity: " << stocks_[i].buy_quantity << "\n";
std::cout << " sell_price: " << stocks_[i].sell_price << "\n";
std::cout << " sell_quantity: " << stocks_[i].sell_quantity << "\n";
}
}
else
{
// An error occurred.
std::cerr << e.message() << std::endl;
}
// Since we are not starting a new operation the io_service will run out of
// work to do and the client will exit.
}
private:
/// The connection to the server.
connection connection_;
/// The data received from the server.
std::vector<stock> stocks_;
};
} // namespace s11n_example
int main(int argc, char* argv[])
{
try
{
// Check command line arguments.
if (argc != 3)
{
std::cerr << "Usage: client <host> <port>" << std::endl;
return 1;
}
boost::asio::io_service io_service;
s11n_example::client client(io_service, argv[1], argv[2]);
io_service.run();
}
catch (std::exception& e)
{
std::cerr << e.what() << std::endl;
}
return 0;
}
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