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- //
- // client.cpp
- // ~~~~~~~~~~
- //
- // Copyright (c) 2003-2019 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_context& io_context,
- const std::string& host, const std::string& service)
- : connection_(io_context.get_executor())
- {
- // Resolve the host name into an IP address.
- boost::asio::ip::tcp::resolver resolver(io_context);
- boost::asio::ip::tcp::resolver::query query(host, service);
- boost::asio::ip::tcp::resolver::iterator endpoint_iterator =
- resolver.resolve(query);
- // Start an asynchronous connect operation.
- boost::asio::async_connect(connection_.socket(), endpoint_iterator,
- boost::bind(&client::handle_connect, this,
- boost::asio::placeholders::error));
- }
- /// Handle completion of a connect operation.
- void handle_connect(const boost::system::error_code& e)
- {
- 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
- {
- // An error occurred. Log it and return. Since we are not starting a new
- // operation the io_context 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_context 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_context io_context;
- s11n_example::client client(io_context, argv[1], argv[2]);
- io_context.run();
- }
- catch (std::exception& e)
- {
- std::cerr << e.what() << std::endl;
- }
- return 0;
- }
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