# Pastebin isfPDuUS
{ config, pkgs, ... }:

{
  imports = [ <nixpkgs/nixos/modules/virtualisation/amazon-image.nix> ];
  ec2.hvm = true;

  systemd.services.helloWorld = let
    helloWorld = pkgs.writeScriptBin "helloWorld" ''
      #!${pkgs.ruby}/bin/ruby
      require 'socket'
      server = TCPServer.new 5678

      while session = server.accept
        request = session.gets
        puts request

        session.print "HTTP/1.1 200\r\n" # 1
        session.print "Content-Type: text/html\r\n" # 2
        session.print "\r\n" # 3
        session.print "Hello world! The time is #{Time.now}" #4

        session.close
      end
    '';
  in {
    description = "Hello world service";
    wantedBy = [ "multi-user.target" ];
    serviceConfig = {
      Type = "simple";
      ExecStart = helloWorld;
    };
  };

}