ceph/src/boost/libs/asio/example/cpp03/http/server3/server.cpp

   1 //
   2 // server.cpp
   3 // ~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2017 Christopher M. Kohlhoff (chris at kohlhoff dot com)
   6 //
   7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   9 //
  10
  11 #include "server.hpp"
  12 #include <boost/thread/thread.hpp>
  13 #include <boost/bind.hpp>
  14 #include <boost/shared_ptr.hpp>
  15 #include <vector>
  16
  17 namespace http {
  18 namespace server3 {
  19
  20 server::server(const std::string& address, const std::string& port,
  21     const std::string& doc_root, std::size_t thread_pool_size)
  22   : thread_pool_size_(thread_pool_size),
  23     signals_(io_context_),
  24     acceptor_(io_context_),
  25     new_connection_(),
  26     request_handler_(doc_root)
  27 {
  28   // Register to handle the signals that indicate when the server should exit.
  29   // It is safe to register for the same signal multiple times in a program,
  30   // provided all registration for the specified signal is made through Asio.
  31   signals_.add(SIGINT);
  32   signals_.add(SIGTERM);
  33 #if defined(SIGQUIT)
  34   signals_.add(SIGQUIT);
  35 #endif // defined(SIGQUIT)
  36   signals_.async_wait(boost::bind(&server::handle_stop, this));
  37
  38   // Open the acceptor with the option to reuse the address (i.e. SO_REUSEADDR).
  39   boost::asio::ip::tcp::resolver resolver(io_context_);
  40   boost::asio::ip::tcp::endpoint endpoint =
  41     *resolver.resolve(address, port).begin();
  42   acceptor_.open(endpoint.protocol());
  43   acceptor_.set_option(boost::asio::ip::tcp::acceptor::reuse_address(true));
  44   acceptor_.bind(endpoint);
  45   acceptor_.listen();
  46
  47   start_accept();
  48 }
  49
  50 void server::run()
  51 {
  52   // Create a pool of threads to run all of the io_contexts.
  53   std::vector<boost::shared_ptr<boost::thread> > threads;
  54   for (std::size_t i = 0; i < thread_pool_size_; ++i)
  55   {
  56     boost::shared_ptr<boost::thread> thread(new boost::thread(
  57           boost::bind(&boost::asio::io_context::run, &io_context_)));
  58     threads.push_back(thread);
  59   }
  60
  61   // Wait for all threads in the pool to exit.
  62   for (std::size_t i = 0; i < threads.size(); ++i)
  63     threads[i]->join();
  64 }
  65
  66 void server::start_accept()
  67 {
  68   new_connection_.reset(new connection(io_context_, request_handler_));
  69   acceptor_.async_accept(new_connection_->socket(),
  70       boost::bind(&server::handle_accept, this,
  71         boost::asio::placeholders::error));
  72 }
  73
  74 void server::handle_accept(const boost::system::error_code& e)
  75 {
  76   if (!e)
  77   {
  78     new_connection_->start();
  79   }
  80
  81   start_accept();
  82 }
  83
  84 void server::handle_stop()
  85 {
  86   io_context_.stop();
  87 }
  88
  89 } // namespace server3
  90 } // namespace http