def thumbnail_exists(self, thumbnail_name):
if self.remote_source:
return False
if utils.is_storage_local(self.source_storage):
source_modtime = utils.get_modified_time(self.source_storage,
self.name)
else:
source = self.get_source_cache()
if not source:
return False
source_modtime = source.modified
if not source_modtime:
return False
local_thumbnails = utils.is_storage_local(self.thumbnail_storage)
if local_thumbnails:
thumbnail_modtime = utils.get_modified_time(self.thumbnail_storage,
thumbnail_name)
if not thumbnail_modtime:
return False
return source_modtime <= thumbnail_modtime
thumbnail = self.get_thumbnail_cache(thumbnail_name)
if not thumbnail:
return False
thumbnail_modtime = thumbnail.modified
return thumbnail
def generate_thumbnail(self, thumbnail_options):
"""
Return a ``ThumbnailFile`` containing a thumbnail image.
The thumbnail image is generated using the ``thumbnail_options``
dictionary.
"""
if not utils.is_storage_local(self.source_storage):
# Get a local copy of the source file
tmp_image_f = StringIO()
orig_f = urllib2.urlopen(self.source_storage.url(self.name))
tmp_image_f.write(orig_f.read())
tmp_image_f.seek(0)
self.file = tmp_image_f
image = engine.generate_source_image(self, thumbnail_options)
thumbnail_image = engine.process_image(image, thumbnail_options)
quality = thumbnail_options.get('quality', self.thumbnail_quality)
filename = self.get_thumbnail_name(thumbnail_options,
transparent=self.is_transparent(thumbnail_image))
data = engine.save_image(thumbnail_image, filename=filename,
quality=quality).read()
thumbnail = ThumbnailFile(filename, ContentFile(data),
storage=self.thumbnail_storage)
thumbnail.image = thumbnail_image
thumbnail._committed = False
return thumbnail
def thumbnail_exists(self, thumbnail_name):
"""
Calculate whether the thumbnail already exists and that the source is
not newer than the thumbnail.
If the source and thumbnail file storages are local, their file
modification times are used. Otherwise the database cached modification
times are used.
"""
if self.remote_source:
return False
if utils.is_storage_local(self.source_storage):
source_modtime = utils.get_modified_time(self.source_storage,
self.name)
else:
source = self.get_source_cache()
if not source:
return False
source_modtime = source.modified
if not source_modtime:
return False
local_thumbnails = utils.is_storage_local(self.thumbnail_storage)
if local_thumbnails:
thumbnail_modtime = utils.get_modified_time(
self.thumbnail_storage, thumbnail_name)
if not thumbnail_modtime:
return False
return source_modtime <= thumbnail_modtime
thumbnail = self.get_thumbnail_cache(thumbnail_name)
if not thumbnail:
return False
thumbnail_modtime = thumbnail.modified
if thumbnail.modified and source_modtime <= thumbnail.modified:
return thumbnail
return False
def thumbnail_exists(self, thumbnail_name):
"""
Calculate whether the thumbnail already exists and that the source is
not newer than the thumbnail.
If the source and thumbnail file storages are local, their file
modification times are used. Otherwise the database cached modification
times are used.
"""
if self.remote_source:
return False
if utils.is_storage_local(self.source_storage):
source_modtime = utils.get_modified_time(
self.source_storage, self.name)
else:
source = self.get_source_cache()
if not source:
return False
source_modtime = source.modified
if not source_modtime:
return False
local_thumbnails = utils.is_storage_local(self.thumbnail_storage)
if local_thumbnails:
thumbnail_modtime = utils.get_modified_time(
self.thumbnail_storage, thumbnail_name)
if not thumbnail_modtime:
return False
return source_modtime <= thumbnail_modtime
thumbnail = self.get_thumbnail_cache(thumbnail_name)
if not thumbnail:
return False
thumbnail_modtime = thumbnail.modified
if thumbnail.modified and source_modtime <= thumbnail.modified:
return thumbnail
return False
