#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
@File       : simple.py
@Author     : lichao
@Date       : 2024/11/25 16:39
@Software   : PyCharm
"""

import requests
import string


def gen_combos():
    chars = string.ascii_lowercase + string.digits
    combos = []
    for char1 in chars:
        for char2 in chars:
            for char3 in chars:
                combos.append(char1 + char2 + char3)
    return combos


def find(base_url, combos):
    for combo in combos:
        url = f"{base_url}{combo}.de"
        print(combo, end="")
        try:
            response = requests.get(url)
            if "is free and available for registration." in response.text:
                print(".de 可注册")
            else:
                print()
        except requests.RequestException as e:
            print(e)


def main():
    base_url = "https://webwhois.denic.de/?lang=en&query="
    combos = gen_combos()
    find(base_url, combos)


if __name__ == "__main__":
    main()