boost::asio::io_service io_service;
//do something with io_service
std::thread run_io_service([&] {
    io_service.run();
});
run_io_service.detach();

#include <QApplication>
#include <QTimer>
#include <QDebug>

#include <iostream>
#include <thread>
#include <boost/asio.hpp>
#include <boost/asio/ssl.hpp>
#include <boost/bind.hpp>

typedef boost::asio::ssl::stream<boost::asio::ip::tcp::socket> ssl_socket;

enum { max_length = 1024 };

class client
{
public:
  client(boost::asio::io_service& io_service,
      boost::asio::ssl::context& context,
      boost::asio::ip::tcp::resolver::iterator endpoint_iterator)
    : socket_(io_service, context)
  {
    socket_.set_verify_mode(boost::asio::ssl::verify_peer);
    socket_.set_verify_callback(
        boost::bind(&client::verify_certificate, this, _1, _2));

    boost::asio::async_connect(socket_.lowest_layer(), endpoint_iterator,
        boost::bind(&client::handle_connect, this,
          boost::asio::placeholders::error));
  }

  bool verify_certificate(bool preverified,
      boost::asio::ssl::verify_context& ctx)
  {
    // The verify callback can be used to check whether the certificate that is
    // being presented is valid for the peer. For example, RFC 2818 describes
    // the steps involved in doing this for HTTPS. Consult the OpenSSL
    // documentation for more details. Note that the callback is called once
    // for each certificate in the certificate chain, starting from the root
    // certificate authority.

    // In this example we will simply print the certificate's subject name.
    char subject_name[256];
    X509* cert = X509_STORE_CTX_get_current_cert(ctx.native_handle());
    X509_NAME_oneline(X509_get_subject_name(cert), subject_name, 256);
    qDebug() << "Verifying " << subject_name;

    return preverified;
  }

  void handle_connect(const boost::system::error_code& error)
  {
    if (!error)
    {
      socket_.async_handshake(boost::asio::ssl::stream_base::client,
          boost::bind(&client::handle_handshake, this,
            boost::asio::placeholders::error));
    }
    else
    {
      std::cout << "Connect failed: " << error.message() << "\n";
    }
  }

  void handle_handshake(const boost::system::error_code& error)
  {
    if (!error)
    {
      size_t request_length = 4;
      memcpy(request_, "test", request_length);
//      std::cout << "Enter message: ";
//      std::cin.getline(request_, max_length);
//      size_t request_length = strlen(request_);

      qDebug() << "Going to send";
      boost::asio::async_write(socket_,
          boost::asio::buffer(request_, request_length),
          boost::bind(&client::handle_write, this,
            boost::asio::placeholders::error,
            boost::asio::placeholders::bytes_transferred));
    }
    else
    {
      std::cout << "Handshake failed: " << error.message() << "\n";
    }
  }

  void handle_write(const boost::system::error_code& error,
      size_t bytes_transferred)
  {
    qDebug() << "handle_write";
    if (!error)
    {
      qDebug() << "Going to read";
      boost::asio::async_read(socket_,
          boost::asio::buffer(reply_, bytes_transferred),
          boost::bind(&client::handle_read, this,
            boost::asio::placeholders::error,
            boost::asio::placeholders::bytes_transferred));
    }
    else
    {
      std::cout << "Write failed: " << error.message() << "\n";
    }
  }

  void handle_read(const boost::system::error_code& error,
      size_t bytes_transferred)
  {
    if (!error)
    {
      //std::cout not working
      //qDebug() << "Reply: ";
      std::cerr << "Reply: ";
      reply_[bytes_transferred] = 0;
      qDebug() << reply_;
    }
    else
    {
      std::cout << "Read failed: " << error.message() << "\n";
    }
  }

private:
  boost::asio::ssl::stream<boost::asio::ip::tcp::socket> socket_;
  char request_[max_length];
  char reply_[max_length];
};

int main(int argc, char *argv[])
{
    //QApplication a(argc, argv);

    boost::asio::io_service io_service;
    boost::asio::ip::tcp::resolver resolver(io_service);
    boost::asio::ip::tcp::resolver::query query("127.0.0.1", "5188");
    boost::asio::ip::tcp::resolver::iterator iterator = resolver.resolve(query);

    boost::asio::ssl::context ctx(boost::asio::ssl::context::sslv23);
    ctx.load_verify_file("ca.pem");

    client c(io_service, ctx, iterator);

    std::thread run_io_service([&io_service] {
        //std::cerr << std::this_thread::get_id() << std::endl;
        qDebug() << "io_service going to run";
        io_service.run();
        qDebug() << "io_service stopped";
    });
    std::cerr << run_io_service.native_handle() << std::endl;
    run_io_service.detach();

    //io_service.run();

//    QTimer timer;
//    QObject::connect(&timer, &QTimer::timeout, [&] {
//        qDebug() << "poll";
//        io_service.poll_one();
//        //io_service.poll();
//    });
//    timer.start(100);

    //return a.exec();
    std::this_thread::sleep_for(std::chrono::seconds(2));
    qDebug() << "End of main";
}

boost::asio::io_service io_service;

boost::asio::io_service::work work(io_service);

std::auto_ptr<boost::asio::io_service::work> work(
        new boost::asio::io_service::work(io_service));

work.reset();