dlib C++ Library - sockets_ex.cpp

    /*

        This is an example illustrating the use of the sockets and
        server components from the dlib C++ Library.

        This is a simple echo server.  It listens on port 1234 for incoming
        connections and just echos back any data it receives.

    */

    #include "dlib/sockets.h"
    #include "dlib/server.h"
    #include <iostream>

    using namespace dlib;
    using namespace std;

    class serv : public server::kernel_1a_c
    {

        void on_connect  (
            connection& con
        )
        {
            char ch;
            while (con.read(&ch,1) > 0)
            {
                // we are just reading one char at a time and writing it back
                // to the connection.  If there is some problem writing the char
                // then we quit the loop.
                if (con.write(&ch,1) != 1)
                    break;
            }
        }

    };

    serv our_server;

    void thread()
    {
        cout << "Press enter to end this program" << endl;
        cin.get();
        // this will cause the server to shut down which will in turn cause
        // our_server.start() to unblock and thus the main() function will terminate.
        our_server.clear();
    }

    int main()
    {
        try
        {
            // create a thread that will listen for the user to end this program
            thread_function t(thread);

            // set up the server object we have made
            our_server.set_listening_port(1234);
            our_server.set_max_connections(1000);

            // start the server
            our_server.start();

        }
        catch (exception& e)
        {
            cout << e.what() << endl;
        }
        catch (...)
        {
            cout << "Some error occurred" << endl;
        }
    }