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

   1 //
   2 // blocking_tcp_echo_client.cpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2018 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 <cstring>
  13 #include <iostream>
  14 #include <boost/asio.hpp>
  15
  16 using boost::asio::ip::tcp;
  17
  18 enum { max_length = 1024 };
  19
  20 int main(int argc, char* argv[])
  21 {
  22   try
  23   {
  24     if (argc != 3)
  25     {
  26       std::cerr << "Usage: blocking_tcp_echo_client <host> <port>\n";
  27       return 1;
  28     }
  29
  30     boost::asio::io_context io_context;
  31
  32     tcp::resolver resolver(io_context);
  33     tcp::resolver::results_type endpoints =
  34       resolver.resolve(tcp::v4(), argv[1], argv[2]);
  35
  36     tcp::socket s(io_context);
  37     boost::asio::connect(s, endpoints);
  38
  39     using namespace std; // For strlen.
  40     std::cout << "Enter message: ";
  41     char request[max_length];
  42     std::cin.getline(request, max_length);
  43     size_t request_length = strlen(request);
  44     boost::asio::write(s, boost::asio::buffer(request, request_length));
  45
  46     char reply[max_length];
  47     size_t reply_length = boost::asio::read(s,
  48         boost::asio::buffer(reply, request_length));
  49     std::cout << "Reply is: ";
  50     std::cout.write(reply, reply_length);
  51     std::cout << "\n";
  52   }
  53   catch (std::exception& e)
  54   {
  55     std::cerr << "Exception: " << e.what() << "\n";
  56   }
  57
  58   return 0;
  59 }