protocol check

domain="poc-server.com"

for port in `sed '/^$/d' "ports.txt"`; do
  url="$domain:$port"
  http=false
  https=false
  protocol=""

  if [[ $(echo "http://$url" | online) ]]; then http=true; else http=false; fi
  if [[ $(echo "https://$url" | online) ]]; then https=true; else https=false; fi

  if [[ "$http" = true ]]; then protocol="http"; fi
  if [[ "$https" = true ]]; then protocol="https"; fi

  if [[ "$http" = true && "$https" = true ]]; then
    # If the content length of http is greater than the content length of https, then we choose http, otherwise we go with https
    contentLengthHTTP=$(curl -s http://$url | wc -c)
    contentLengthHTTPS=$(curl -s https://$url | wc -c)
    if [[ "$contentLengthHTTP" -gt "$contentLengthHTTPS" ]]; then protocol="http"; else protocol="https"; fi

    if [[ "$port" == "80" ]]; then protocol="http"; fi
    if [[ "$port" == "443" ]]; then protocol="https"; fi
  fi

  if [[ ! -z "$protocol" ]]; then
    echo "$protocol://$domain:$port"
  fi
done