def photo_size(request,
id,
size,
crop=False,
quality=90,
download=False,
constrain=False):
"""
Renders image and returns response
Does not use template
Saves resized image within cache system
Returns 404 if if image rendering fails
"""
if isinstance(quality, str) and quality.isdigit():
quality = int(quality)
cache_key = generate_image_cache_key(file=id,
size=size,
pre_key=PHOTO_PRE_KEY,
crop=crop,
unique_key=id,
quality=quality,
constrain=constrain)
cached_image = cache.get(cache_key)
if cached_image:
return redirect('{0}{1}'.format(
get_setting('site', 'global', 'siteurl'), cached_image))
photo = get_object_or_404(Image, id=id)
size = [int(s) for s in size.split('x')]
size = aspect_ratio(photo.image_dimensions(), size, constrain)
# check permissions
if not has_perm(request.user, 'photos.view_image', photo):
raise Http403
attachment = ''
if download:
attachment = 'attachment;'
if not photo.image or not default_storage.exists(photo.image.name):
raise Http404
# At this point, we didn't get the image from the cache.
# Check if this particular thumbnail already exists on file system.
# If it's there, no need to rebuild it from the original image!
file_name = photo.image_filename()
file_path = 'cached%s%s' % (request.path, file_name)
if default_storage.exists(file_path):
image = get_image_from_path(
os.path.join(settings.MEDIA_ROOT, file_path))
else:
# gets resized image from cache or rebuild
image = get_image(photo.image,
size,
PHOTO_PRE_KEY,
crop=crop,
quality=quality,
unique_key=str(photo.pk),
constrain=constrain)
# if image not rendered; quit
if not image:
raise Http404
response = HttpResponse(content_type='image/jpeg')
response['Content-Disposition'] = '%s filename="%s"' % (
attachment, photo.image_filename())
image.convert('RGB').save(response, "JPEG", quality=quality)
if photo.is_public_photo() and photo.is_public_photoset():
if not default_storage.exists(file_path):
default_storage.save(file_path, ContentFile(response.content))
full_file_path = "%s%s" % (settings.MEDIA_URL, file_path)
cache.set(cache_key, full_file_path)
cache_group_key = "photos_cache_set.%s" % photo.pk
cache_group_list = cache.get(cache_group_key)
if cache_group_list is None:
cache.set(cache_group_key, [cache_key])
else:
cache_group_list += [cache_key]
cache.set(cache_group_key, cache_group_list)
return response
def photo_size(request, id, size, crop=False, quality=90, download=False, constrain=False):
"""
Renders image and returns response
Does not use template
Saves resized image within cache system
Returns 404 if if image rendering fails
"""
if isinstance(quality, unicode) and quality.isdigit():
quality = int(quality)
cache_key = generate_image_cache_key(file=id, size=size, pre_key=PHOTO_PRE_KEY, crop=crop, unique_key=id, quality=quality, constrain=constrain)
cached_image = cache.get(cache_key)
if cached_image:
return redirect('{0}{1}'.format(get_setting('site', 'global', 'siteurl'), cached_image))
photo = get_object_or_404(Image, id=id)
size = [int(s) for s in size.split('x')]
size = aspect_ratio(photo.image_dimensions(), size, constrain)
# check permissions
if not has_perm(request.user, 'photos.view_image', photo):
raise Http403
attachment = ''
if download:
attachment = 'attachment;'
if not photo.image or not default_storage.exists(photo.image.name):
raise Http404
# At this point, we didn't get the image from the cache.
# Check if this particular thumbnail already exists on file system.
# If it's there, no need to rebuild it from the original image!
file_name = photo.image_filename()
file_path = 'cached%s%s' % (request.path, file_name)
if default_storage.exists(file_path):
image = get_image_from_path(os.path.join(settings.MEDIA_ROOT, file_path))
else:
# gets resized image from cache or rebuild
image = get_image(photo.image, size, PHOTO_PRE_KEY, crop=crop, quality=quality, unique_key=str(photo.pk), constrain=constrain)
# if image not rendered; quit
if not image:
raise Http404
response = HttpResponse(content_type='image/jpeg')
response['Content-Disposition'] = '%s filename="%s"' % (attachment, photo.image_filename())
image.convert('RGB').save(response, "JPEG", quality=quality)
if photo.is_public_photo() and photo.is_public_photoset():
if not default_storage.exists(file_path):
default_storage.save(file_path, ContentFile(response.content))
full_file_path = "%s%s" % (settings.MEDIA_URL, file_path)
cache.set(cache_key, full_file_path)
cache_group_key = "photos_cache_set.%s" % photo.pk
cache_group_list = cache.get(cache_group_key)
if cache_group_list is None:
cache.set(cache_group_key, [cache_key])
else:
cache_group_list += [cache_key]
cache.set(cache_group_key, cache_group_list)
return response