Guess file extension based on content-type. When downloading a file, and no path is supplied to store it, guess the file extension using mimetypes and the content-type header. Also supply a unit test for the HotLinkImageForm.

"""
Celery tasks for the POTD app.

"""
from __future__ import absolute_import

from celery import shared_task

import potd.tools


@shared_task
def pick_potd():
    potd.tools.pick_potd()