def __init__(self,
width=None,
height=None,
anchor=None,
crop=None,
upscale=None,
**kwargs):
self.processors = [
ThumbnailProcessor(width,
height,
anchor=anchor,
crop=crop,
upscale=upscale)
]
source = kwargs.get('source')
if not (source is not None and getattr(source, 'name', None)):
random_image = get_random_image()
media_root = os.path.abspath(django_settings.MEDIA_ROOT)
static_root = os.path.abspath(django_settings.STATIC_ROOT)
source = ImageCacheFile(self, name=random_image)
source.name = source.file.name \
.replace(media_root, '') \
.replace(static_root, '')[1:]
kwargs['source'] = source
super(DummyThumbnail, self).__init__(**kwargs)
def generic_cached_admin_thumb(instance):
image = instance.images.first()
if image:
cached = ImageCacheFile(AdminThumbnailSpec(image.image_file))
cached.generate()
return cached
return None
def add_thumb_if_not_none(files, field):
from imagekit.cachefiles import ImageCacheFile
if field:
image_generator = U24Thumbnail(source=field.file)
file = ImageCacheFile(image_generator)
file.generate()
files.append(os.path.join(settings.MEDIA_ROOT, file.name))
def get_thumb_url(field: ImageFieldFile):
from imagekit.cachefiles import ImageCacheFile
if field:
image_generator = PreviewThumbnail(source=field.file)
file = ImageCacheFile(image_generator)
file.generate()
return file.url
return None
def cached_admin_thumb(instance):
if instance.img:
# `image` is the name of the image field on the model
cached = ImageCacheFile(AdminThumbnailSpec(instance.img))
# only generates the first time, subsequent calls use cache
cached.generate()
return cached
return ""
def cached_list_thumb(instance):
# 'image' is the name of the image field on the model
cached = ''
if instance.image:
cached = ImageCacheFile(ListThumbnail(instance.image))
# only generates the first time, subsequent calls use cache
cached.generate()
return cached
def _crop_image(self):
if not self.is_image:
raise Attachment.NotAnImageException("Attachment is not an image. Use is_image to check"
" if attachment is an image before asking for the "
"cropped version.")
generator = Attachment.CroppedImage(source=self.file)
cache_file = ImageCacheFile(generator)
try:
cache_file.generate()
except FileNotFoundError as e:
logger.warn("File not found when generating cache file: " + str(e))
return cache_file
def source_group_receiver(self, sender, source, signal, **kwargs):
"""
Relay source group signals to the appropriate spec strategy.
"""
from imagekit.cachefiles import ImageCacheFile
source_group = sender
# Ignore signals from unregistered groups.
if source_group not in self._source_groups:
return
#OVERRIDE HERE -- pass specs into generator object
specs = [
generator_registry.get(id,
source=source,
specs=spec_data_field_hash[id])
for id in self._source_groups[source_group]
]
callback_name = self._signals[signal]
#END OVERRIDE
for spec in specs:
file = ImageCacheFile(spec)
call_strategy_method(file, callback_name)
def source_group_receiver(self, sender, source, signal, **kwargs):
"""
Relay source group signals to the appropriate spec strategy.
"""
from imagekit.cachefiles import ImageCacheFile
source_group = sender
instance = kwargs['instance']
# Ignore signals from unregistered groups.
if source_group not in self._source_groups:
return
#HOOK -- update source to point to image file.
for id in self._source_groups[source_group]:
spec_to_update = generator_registry.get(id, source=source, instance=instance, field=hack_spec_field_hash[id])
specs = [generator_registry.get(id, source=source, instance=instance, field=hack_spec_field_hash[id]) for id in
self._source_groups[source_group]]
callback_name = self._signals[signal]
# print 'callback_name? %s'%(callback_name)
for spec in specs:
file = ImageCacheFile(spec)
# print 'SEPC %s file %s'%(spec, file)
call_strategy_method(file, callback_name)
def test_no_source_falsiness():
"""
Ensure cache files generated from sourceless specs are falsy.
"""
spec = TestSpec(source=None)
file = ImageCacheFile(spec)
assert_file_is_falsy(file)
def test_async_backend_falsiness():
"""
Ensure that a cachefile with an asynchronous cache file backend is falsy.
"""
spec = TestSpec(source=get_unique_image_file())
file = ImageCacheFile(spec, cachefile_backend=DummyAsyncCacheFileBackend())
assert_file_is_falsy(file)
def test_cachefiles():
spec = TestSpec(source=get_unique_image_file())
file = ImageCacheFile(spec)
file.url
# remove link to file from spec source generator
# test __getstate__ of ImageCacheFile
file.generator.source = None
pickleback(file)
def get(self, request, *args, **kwargs):
photo = self.get_object()
width = int(request.GET.get('w', photo.image.width))
height = int(request.GET.get('h', photo.image.height))
style = request.GET.get('s', 'fill')
proc = CROP_STYLES.get(style, ResizeToFill)
spec = CropSpec(source=photo.image)
spec.processors = [proc(width, height)]
icf = ImageCacheFile(spec)
icf.generate()
return HttpResponseRedirect(icf.url)
def get_image_cache_file():
storage = Mock(FileSystemStorage)
backend = SimpleCFBackend()
strategy = OptimisticStrategy()
generator = ImageGenerator()
return ImageCacheFile(generator, storage=storage,
cachefile_backend=backend,
cachefile_strategy=strategy)
def test_sync_backend_truthiness():
"""
Ensure that a cachefile with a synchronous cache file backend (the default)
is truthy.
"""
spec = TestSpec(source=get_unique_image_file())
file = ImageCacheFile(spec)
assert_file_is_truthy(file)
def _get_SIZE_url(self, size):
photosize = PhotoSizeCache().sizes.get(size)
if not self.size_exists(photosize):
self.create_size(photosize)
if photosize.increment_count:
self.increment_count()
generator = PhotologueSpec(photo=self, photosize=photosize)
image_url = urlparse.urljoin(self.image.url, 'f')
cache = ImageCacheFile(generator)
return cache.url
def thumb(content, thumb_type=None):
"""A filter to return an image file used to preview a Content as a thumbnail.
The particular image selected depends on the type of Content.
"""
image = None # The ImageField that we're using as a source for the thumbnail
if (
isinstance(content, models.Story) or isinstance(content, models.Video)
) and content.cover:
image = content.cover.source
elif isinstance(content, models.Image):
image = content.source
elif isinstance(content, models.Gallery) and content.entries.count() > 0:
# Gallery cache currently messed up, so no thumbnail for now
# image = thumb(content.entries_in_order()[0])
return content.entries_in_order()[0].source.url
if image is None:
return None
if thumb_type is None:
return True
# Check which thumbnail generator we're using
klass = {
"small": SmallThumbnail,
"medium": MediumThumbnail,
"large": LargeThumbnail,
"huge": HugeThumbnail,
}[thumb_type]
# Make the thumbnail generator and cache the result
try:
generator = klass(source=image)
cached_file = ImageCacheFile(generator)
cached_file.generate() # This seems to be necessary to save the file
return cached_file.url
except FileNotFoundError:
return None
except (IOError, SyntaxError): # Error actually parsing the file
return image.url
def handle(self, *args, **options):
generators = generator_registry.get_ids()
if args:
patterns = self.compile_patterns(args)
generators = (id for id in generators if any(
p.match(id) for p in patterns))
for generator_id in generators:
self.stdout.write('Validating generator: %s\n' % generator_id)
try:
for image_file in cachefile_registry.get(generator_id):
if image_file.name:
self.stdout.write(' %s\n' % image_file.name)
try:
image_file.generate()
except Exception as err:
self.stdout.write('\tFailed %s\n' % (err))
except:
items = cachefile_registry._cachefiles.items()
for k, v in items:
if generator_id in v:
#k is SourceGroupFilesGenerator
model_class = k.source_group.model_class
image_field = k.source_group.image_field
all_objects = model_class.objects.all()
item_count = len(all_objects)
count = 0
for instance in all_objects:
count += 1
print
try:
source = getattr(instance, image_field)
specs = spec_data_field_hash[generator_id]
spec = generator_registry.get(generator_id,
source=source,
specs=specs)
file = ImageCacheFile(spec)
self.stdout.write(' [%s of %s] - %s\n' %
(count, item_count, file))
call_strategy_method(file, 'on_source_saved')
except Exception:
self.stdout.write('ERROR: %s\n' %
(traceback.format_exc()))
def test_cachefiles():
clear_imagekit_cache()
spec = TestSpec(source=get_unique_image_file())
file = ImageCacheFile(spec)
file.url
# remove link to file from spec source generator
# test __getstate__ of ImageCacheFile
file.generator.source = None
restored_file = pickleback(file)
assert file is not restored_file
# Assertion for #437 and #451
assert file.storage is restored_file.storage
def test_repr_does_not_send_existence_required():
"""
Ensure that `__repr__` method does not send `existance_required` signal
Cachefile strategy may be configured to generate file on
`existance_required`.
To generate images, backend passes `ImageCacheFile` instance to worker.
Both celery and RQ calls `__repr__` method for each argument to enque call.
And if `__repr__` of object will send this signal, we will get endless
recursion
"""
with mock.patch('imagekit.cachefiles.existence_required') as signal:
# import here to apply mock
from imagekit.cachefiles import ImageCacheFile
spec = TestSpec(source=get_unique_image_file())
file = ImageCacheFile(spec,
cachefile_backend=DummyAsyncCacheFileBackend())
file.__repr__()
eq_(signal.send.called, False)
def generate_images(self, force_create=False):
"""
Generate resized images from the master
:param bool force_create: Create thumbnail, small, and medium
images even if they already exist
"""
if self.original:
base_name = self.original.name
if force_create or not self.thumbnail:
try:
image_generator = SightingImageThumbnail(source=self.original)
filename = u'%s.thumbnail.jpg' % base_name
result = ImageCacheFile(image_generator, name=filename) #.generate()
result.generate()
self.thumbnail.name = filename
self.save()
finally:
self.original.close()
#self.thumbnail.close()
if force_create or not self.small:
try:
image_generator = SightingImageSmall(source=self.original)
filename = u'%s.small.jpg' % base_name
result = ImageCacheFile(image_generator, name=filename) #.generate()
result.generate()
self.small.name = filename
self.save()
finally:
self.original.close()
#self.small.close()
if force_create or not self.medium:
try:
image_generator = SightingImageMedium(source=self.original)
filename = u'%s.medium.jpg' % base_name
result = ImageCacheFile(image_generator, name=filename) #.generate()
result.generate()
self.medium.name = filename
self.save()
finally:
self.original.close()
def __get__(self, instance, owner):
# print 'get %s - %s. attname: %s field %s source_field_name: %s'%(instance, owner, self.attname, self.field, self.source_field_name)
if instance is None:
return self.field
else:
source = getattr(instance, self.source_field_name)
spec = self.field.get_spec(source=source, instance=instance)
file = ImageCacheFile(spec)
instance.__dict__[self.attname] = file
return file
def test_repr_does_not_send_existence_required():
"""
Ensure that `__repr__` method does not send `existance_required` signal
Cachefile strategy may be configured to generate file on
`existance_required`.
To generate images, backend passes `ImageCacheFile` instance to worker.
Both celery and RQ calls `__repr__` method for each argument to enque call.
And if `__repr__` of object will send this signal, we will get endless
recursion
"""
with mock.patch('imagekit.cachefiles.existence_required') as signal:
# import here to apply mock
from imagekit.cachefiles import ImageCacheFile
spec = TestSpec(source=get_unique_image_file())
file = ImageCacheFile(
spec,
cachefile_backend=DummyAsyncCacheFileBackend()
)
file.__repr__()
eq_(signal.send.called, False)
def _local_image_url(self, size):
"""
Generate the URL of an image of a particular size, hosted locally,
based on the original file (which must already be downloaded).
"""
if self.original_file:
if size == 'original':
return self.original_file.url
else:
generator = self.PHOTO_SIZES[size]['generator']
try:
image_generator = generator(source=self.original_file)
result = ImageCacheFile(image_generator)
return result.url
except:
# We have an original file but something's wrong with it.
# Might be 0 bytes or something.
return static('img/original_error.jpg')
else:
# We haven't downloaded an original file for this Photo.
return static('img/original_missing.jpg')
def _local_image_url(self, size):
"""
Generate the URL of an image of a particular size, hosted locally,
based on the original file (which must already be downloaded).
size -- one of 'large', 'medium', 'small', or 'thumbnail'.
"""
if self.image_file:
if size == 'large':
# Essentially the original file.
return self.image_file.url
else:
generator = self.IMAGE_SIZES[size]['generator']
try:
image_generator = generator(source=self.image_file)
result = ImageCacheFile(image_generator)
return result.url
except:
# We have an original file but something's wrong with it.
# Might be 0 bytes or something.
return static('img/original_error.jpg')
else:
# We haven't downloaded an original file for this.
return static('img/original_missing.jpg')
def generate_thumbnail(self, source, **kwargs):
generator = generator_registry.get(self.generator_id,
source=source,
**kwargs)
return ImageCacheFile(generator)
def test_no_source_error():
spec = TestSpec(source=None)
file = ImageCacheFile(spec)
file.generate()
def cached_default(self):
generator = ImageCacheFile(self.default)
return generator.generate()
def test_accessor_methods_filename(self):
generator = PhotologueSpec(photo=self.pl, photosize=self.s)
cache = ImageCacheFile(generator)
self.assertEqual(self.pl.get_testPhotoSize_filename(), cache.file.name)
def cached_preview(self):
generator = ImageCacheFile(self.preview)
return generator.generate()
def test_no_source_error():
spec = TestSpec(source=None)
file = ImageCacheFile(spec)
file.generate()
def cached_tiny_thumb(self):
generator = ImageCacheFile(self.tiny_thumb)
return generator.generate()
def cached_bigger(self):
generator = ImageCacheFile(self.bigger)
return generator.generate()
def get_image(self, image, w, h):
generator = self.get_generator(w, h)(source=image)
file = ImageCacheFile(generator)
file.generate()
return file
def create_size(self, photosize):
generator = PhotologueSpec(photo=self, photosize=photosize)
cache = ImageCacheFile(generator)
cache.generate()
def _get_SIZE_filename(self, size):
photosize = PhotoSizeCache().sizes.get(size)
generator = PhotologueSpec(photo=self, photosize=photosize)
cache = ImageCacheFile(generator)
return cache.name
def create_size(self, photosize):
generator = PhotologueSpec(photo=self, photosize=photosize)
cache = ImageCacheFile(generator)
cache.generate()
def cached_admin_thumb(instance):
cached = ImageCacheFile(AdminThumbnailSpec(instance.image))
cached.generate()
return cached
def cached_full_fixed(self):
generator = ImageCacheFile(self.full_fixed)
return generator.generate()
