schemedet.py

# -*- coding: utf-8 -*-
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software
#  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
#  MA 02110-1301, USA.
#
#  Author: Mauro Soria

import ssl
import socket

from lib.core.settings import SOCKET_TIMEOUT


def detect_scheme(host, port):
    if not port:
        raise ValueError

    s = socket.socket()
    s.settimeout(SOCKET_TIMEOUT)
    conn = ssl.create_default_context().wrap_socket(s, server_hostname=host)

    try:
        conn.connect((host, port))
        conn.close()
        return "https"
    except Exception:
        return "http"