def generate(cls, manga):
"""
This method is locked for up to 30 seconds (per manga) until it returns.
This prevents the server from falling over due to stampede effect.
"""
if not cls.acquire_lock(manga): return
try:
manga_archive = MangaArchive.objects.get(manga=manga)
DeletedFile.objects.create(path=manga_archive.file.path)
except MangaArchive.DoesNotExist:
manga_archive = MangaArchive(manga=manga)
manga_zip_file = BytesIO()
manga_zip = zipfile.ZipFile(manga_zip_file, 'w')
# write manga pages into zip file
for page in MangaPage.objects.filter(manga=manga).order_by('page'):
if not page.image: continue
extension = get_image_extension(page.image)
manga_zip.write(page.image.path, '{:03d}.{}'.format(page.page, extension))
# write info.txt into zip file
info_text = manga.info_text
manga_zip.writestr('info.txt', info_text)
manga_zip.close()
manga_archive.name = manga.archive_name
manga_archive.file = UploadedFile(manga_zip_file, 'archive.zip')
manga_archive.save()
manga_zip_file.close()
cls.release_lock(manga)
return manga_archive
def manga_page_upload_to(instance, filename):
filename = '{}-{}.{}'.format(instance.page, get_timestamp(), get_image_extension(instance.image))
dirs = int_to_base36(instance.manga.id)
return os.sep.join(['manga-page'] + list(dirs) + [filename])
def tag_cover_upload_to(instance, filename):
filename = '{}-{}.{}'.format(int_to_base36(instance.id), get_timestamp(), get_image_extension(instance.cover))
dirs = int_to_base36(instance.id)[:-1]
return os.sep.join(['tag-cover'] + list(dirs) + [filename])
def user_avatar_upload_to(instance, filename):
filename = '{}.{}'.format(int_to_base36(instance.id), get_image_extension(instance.avatar))
dirs = int_to_base36(instance.id)[:-1]
return os.sep.join(['user-avatar'] + list(dirs) + [filename])