asio/src/examples/cpp03/http/server2/server.cpp

//
// server.cpp
// ~~~~~~~~~~
//
// Copyright (c) 2003-2016 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 "server.hpp"
#include <boost/bind.hpp>

namespace http {
namespace server2 {

server::server(const std::string& address, const std::string& port,
    const std::string& doc_root, std::size_t io_context_pool_size)
  : io_context_pool_(io_context_pool_size),
    signals_(io_context_pool_.get_io_context()),
    acceptor_(io_context_pool_.get_io_context()),
    new_connection_(),
    request_handler_(doc_root)
{
  // Register to handle the signals that indicate when the server should exit.
  // It is safe to register for the same signal multiple times in a program,
  // provided all registration for the specified signal is made through Asio.
  signals_.add(SIGINT);
  signals_.add(SIGTERM);
#if defined(SIGQUIT)
  signals_.add(SIGQUIT);
#endif // defined(SIGQUIT)
  signals_.async_wait(boost::bind(&server::handle_stop, this));

  // Open the acceptor with the option to reuse the address (i.e. SO_REUSEADDR).
  asio::ip::tcp::resolver resolver(acceptor_.get_executor().context());
  asio::ip::tcp::endpoint endpoint =
    *resolver.resolve(address, port).begin();
  acceptor_.open(endpoint.protocol());
  acceptor_.set_option(asio::ip::tcp::acceptor::reuse_address(true));
  acceptor_.bind(endpoint);
  acceptor_.listen();

  start_accept();
}

void server::run()
{
  io_context_pool_.run();
}

void server::start_accept()
{
  new_connection_.reset(new connection(
        io_context_pool_.get_io_context(), request_handler_));
  acceptor_.async_accept(new_connection_->socket(),
      boost::bind(&server::handle_accept, this,
        asio::placeholders::error));
}

void server::handle_accept(const asio::error_code& e)
{
  if (!e)
  {
    new_connection_->start();
  }

  start_accept();
}

void server::handle_stop()
{
  io_context_pool_.stop();
}

} // namespace server2
} // namespace http