import uuid
import requests
from django.core.files.base import ContentFile
import re


def prepare_file(url):
    file_extension = re.search(r'[^/\\&\?]+\.(?P<extension>\w{3,4})(?=([\?&].*$|$))',
                               url).group('extension')
    file_unique_name = uuid.uuid4()
    file = ContentFile(requests.get(url).content)
    return '{}.{}'.format(file_unique_name, file_extension), file