ceph/src/boost/libs/asio/example/cpp03/echo/blocking_tcp_echo_server.cpp

   1 //
   2 // blocking_tcp_echo_server.cpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2016 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 <cstdlib>
  12 #include <iostream>
  13 #include <boost/bind.hpp>
  14 #include <boost/smart_ptr.hpp>
  15 #include <boost/asio.hpp>
  16 #include <boost/thread/thread.hpp>
  17
  18 using boost::asio::ip::tcp;
  19
  20 const int max_length = 1024;
  21
  22 typedef boost::shared_ptr<tcp::socket> socket_ptr;
  23
  24 void session(socket_ptr sock)
  25 {
  26   try
  27   {
  28     for (;;)
  29     {
  30       char data[max_length];
  31
  32       boost::system::error_code error;
  33       size_t length = sock->read_some(boost::asio::buffer(data), error);
  34       if (error == boost::asio::error::eof)
  35         break; // Connection closed cleanly by peer.
  36       else if (error)
  37         throw boost::system::system_error(error); // Some other error.
  38
  39       boost::asio::write(*sock, boost::asio::buffer(data, length));
  40     }
  41   }
  42   catch (std::exception& e)
  43   {
  44     std::cerr << "Exception in thread: " << e.what() << "\n";
  45   }
  46 }
  47
  48 void server(boost::asio::io_service& io_service, unsigned short port)
  49 {
  50   tcp::acceptor a(io_service, tcp::endpoint(tcp::v4(), port));
  51   for (;;)
  52   {
  53     socket_ptr sock(new tcp::socket(io_service));
  54     a.accept(*sock);
  55     boost::thread t(boost::bind(session, sock));
  56   }
  57 }
  58
  59 int main(int argc, char* argv[])
  60 {
  61   try
  62   {
  63     if (argc != 2)
  64     {
  65       std::cerr << "Usage: blocking_tcp_echo_server <port>\n";
  66       return 1;
  67     }
  68
  69     boost::asio::io_service io_service;
  70
  71     using namespace std; // For atoi.
  72     server(io_service, atoi(argv[1]));
  73   }
  74   catch (std::exception& e)
  75   {
  76     std::cerr << "Exception: " << e.what() << "\n";
  77   }
  78
  79   return 0;
  80 }