src/cover/management/commands/refresh_covers.py

   1 # This file is part of FNP-Redakcja, licensed under GNU Affero GPLv3 or later.
   2 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
   3 #
   4 import urllib2 as urllib
   5 from django.core.files.base import ContentFile
   6 from django.core.management import BaseCommand
   7
   8 from cover.models import Image
   9 from cover.utils import get_flickr_data, URLOpener, FlickrError
  10
  11
  12 class Command(BaseCommand):
  13     def add_arguments(self, parser):
  14         parser.add_argument('--from', dest='from_id', type=int, default=1)
  15
  16     def handle(self, *args, **options):
  17         from_id = options.get('from_id', 1)
  18         images = Image.objects.filter(id__gte=from_id).exclude(book=None).order_by('id')
  19         images = images.filter(source_url__contains='flickr.com').exclude(download_url__endswith='_o.jpg')
  20         for image in images:
  21             print(image.id)
  22             try:
  23                 flickr_data = get_flickr_data(image.source_url)
  24                 print(flickr_data)
  25             except FlickrError as e:
  26                 print('Flickr analysis failed: %s' % e)
  27             else:
  28                 flickr_url = flickr_data['download_url']
  29                 if flickr_url != image.download_url:
  30                     same_url = Image.objects.filter(download_url=flickr_url)
  31                     if same_url:
  32                         print('Download url already present in image %s' % same_url.get().id)
  33                         continue
  34                 try:
  35                     t = URLOpener().open(flickr_url).read()
  36                 except urllib.URLError:
  37                     print('Broken download url')
  38                 except IOError:
  39                     print('Connection failed')
  40                 else:
  41                     image.download_url = flickr_url
  42                     image.file.save(image.file.name, ContentFile(t))
  43                     image.save()