def get_thumb(self, scale, key = None, direction = "thumbnail"):
""" Return data from plone scale or None"""
#Make cache optional
if key is None:
key = getattr(self.context, 'blob_key', 'image')
cachekey = (self.context.uid, scale, key, direction)
cached = self.thumb_cache.get(cachekey)
if cached:
return cached
if direction not in _ALLOWED_SCALE_DIRECTIONS:
return
scales = get_image_scales()
maxwidth, maxheight = scales[scale]
blobs = IBlobs(self.context)
if key in blobs:
registry = get_current_registry()
if blobs[key].mimetype in registry.settings['supported_thumbnail_mimetypes']:
with blobs[key].blob.open() as f:
try:
thumb_data, image_type, size = scaleImage(
f, width = maxwidth, height = maxheight, direction = direction
)
except IOError:
#FIXME: Logging?
return
thumb = Thumbnail(thumb_data, image_type = image_type, size = size)
self.thumb_cache.put(cachekey, thumb)
return thumb
def thumb_view(context, request, subpath=None):
if subpath is None:
subpath = request.subpath
if len(subpath) != 2:
return HTTPNotFound()
key = subpath[0] #Usually 'image', the blob area where it's stored
scale_name = subpath[1] #Some scale, like 'col-1'
scales = get_image_scales()
if scale_name not in scales:
return HTTPNotFound()
thumbnails = request.registry.queryAdapter(context, IThumbnails)
if not thumbnails:
#Log?
raise HTTPNotFound()
thumb = thumbnails.get_thumb(scale_name, key=key)
if thumb:
return Response(
body=thumb.image,
headerlist=[
# disposition = 'inline'
# ('Content-Disposition', '%s;filename="%s"' % (
# disposition, context.filename.encode('ascii', 'ignore'))),
('Content-Type', thumb.mimetype),
('Etag', thumb.etag)
])
raise HTTPNotFound()
def thumb_view(context, request, subpath=None):
if subpath is None:
subpath = request.subpath
if len(subpath) != 2:
return HTTPNotFound()
key = subpath[0] # Usually 'image', the blob area where it's stored
scale_name = subpath[1] # Some scale, like 'col-1'
scales = get_image_scales()
if scale_name not in scales:
return HTTPNotFound()
thumbnails = request.registry.queryAdapter(context, IThumbnails)
if not thumbnails:
# Log?
raise HTTPNotFound()
thumb = thumbnails.get_thumb(scale_name, key=key)
if thumb:
return Response(
body=thumb.image,
headerlist=[
# disposition = 'inline'
# ('Content-Disposition', '%s;filename="%s"' % (
# disposition, context.filename.encode('ascii', 'ignore'))),
("Content-Type", thumb.mimetype),
("Etag", thumb.etag),
],
)
raise HTTPNotFound()
def images_panel(context, request, va, **kw):
response = {'mime_to_title': image_mime_to_title,
'scales': get_image_scales(request.registry)}
return render('arche:templates/sysinfo/images.pt', response, request = request)
def thumb_url(request, context, scale, key = None, direction = 'thumbnail'):
if key is None:
key = getattr(context, 'blob_key', 'image')
scales = get_image_scales(request.registry)
if scale in scales and IThumbnailedContent.providedBy(context) and key in IBlobs(context, ()):
return request.resource_url(context, 'thumbnail', key, scale, direction)