text: //
  // server.hpp
  // ~~~~~~~~~~
  //
  // Copyright (c) 2003-2015 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)
  //
  
  #ifndef HTTP_SERVER3_SERVER_HPP
  #define HTTP_SERVER3_SERVER_HPP
  
  #include <asio.hpp>
  #include <string>
  #include <vector>
  #include <boost/noncopyable.hpp>
  #include <boost/shared_ptr.hpp>
  #include "connection.hpp"
  #include "request_handler.hpp"
  
  namespace http {
  namespace server3 {
  
  /// The top-level class of the HTTP server.
  class server
    : private boost::noncopyable
  {
  public:
    /// Construct the server to listen on the specified TCP address and port, and
    /// serve up files from the given directory.
    explicit server(const std::string& address, const std::string& port,
        const std::string& doc_root, std::size_t thread_pool_size);
  
    /// Run the server's io_service loop.
    void run();
  
  private:
    /// Initiate an asynchronous accept operation.
    void start_accept();
  
    /// Handle completion of an asynchronous accept operation.
    void handle_accept(const asio::error_code& e);
  
    /// Handle a request to stop the server.
    void handle_stop();
  
    /// The number of threads that will call io_service::run().
    std::size_t thread_pool_size_;
  
    /// The io_service used to perform asynchronous operations.
    asio::io_service io_service_;
  
    /// The signal_set is used to register for process termination notifications.
    asio::signal_set signals_;
  
    /// Acceptor used to listen for incoming connections.
    asio::ip::tcp::acceptor acceptor_;
  
    /// The next connection to be accepted.
    connection_ptr new_connection_;
  
    /// The handler for all incoming requests.
    request_handler request_handler_;
  };
  
  } // namespace server3
  } // namespace http
  
  #endif // HTTP_SERVER3_SERVER_HPP
  