def validate_og_fallback_image(value):
"""Check if fallback image follows best practices on MIME type,
size, dimensions and aspect ratio.
"""
if value is None:
return True
filename, data = b64decode_file(value)
image = NamedBlobImage(data=data, filename=filename)
if image.contentType not in OG_LEAD_IMAGE_MIME_TYPES:
raise Invalid(MSG_INVALID_OG_LEAD_IMAGE_MIME_TYPE)
if image.getSize() > OG_LEAD_IMAGE_MAX_SIZE:
raise Invalid(MSG_INVALID_OG_LEAD_IMAGE_SIZE)
width, height = image.getImageSize()
if width < OG_LEAD_IMAGE_MIN_WIDTH or height < OG_LEAD_IMAGE_MIN_HEIGHT:
raise Invalid(MSG_INVALID_OG_LEAD_IMAGE_DIMENSIONS)
aspect_ratio = width / height
if aspect_ratio < OG_LEAD_IMAGE_MIN_ASPECT_RATIO:
raise Invalid(MSG_INVALID_OG_LEAD_IMAGE_ASPECT_RATIO)
return True
def validate_og_fallback_image(value):
"""Check if fallback image follows best practices on MIME type,
size, dimensions and aspect ratio.
"""
if value is None:
return True
filename, data = b64decode_file(value)
image = NamedBlobImage(data=data, filename=filename)
if image.contentType not in OG_LEAD_IMAGE_MIME_TYPES:
raise Invalid(MSG_INVALID_OG_LEAD_IMAGE_MIME_TYPE)
if image.getSize() > OG_LEAD_IMAGE_MAX_SIZE:
raise Invalid(MSG_INVALID_OG_LEAD_IMAGE_SIZE)
width, height = image.getImageSize()
if width < OG_LEAD_IMAGE_MIN_WIDTH or height < OG_LEAD_IMAGE_MIN_HEIGHT:
raise Invalid(MSG_INVALID_OG_LEAD_IMAGE_DIMENSIONS)
aspect_ratio = width / height
if aspect_ratio < OG_LEAD_IMAGE_MIN_ASPECT_RATIO:
raise Invalid(MSG_INVALID_OG_LEAD_IMAGE_ASPECT_RATIO)
return True
def test_opened_file_storable(self):
data = getFile('image.gif')
f = tempfile.NamedTemporaryFile(delete=False)
try:
path = f.name
f.write(data)
f.close()
with open(path, 'rb') as f:
fi = NamedBlobImage(f, filename=u'image.gif')
finally:
if os.path.exists(path):
os.remove(path)
self.assertEqual(303, fi.getSize())
def test_filechunk_storable(self):
fi = NamedBlobImage(FileChunk(getFile('image.gif').read()),
filename=u'image.gif')
self.assertEqual(303, fi.getSize())
def test_pdata_storable(self):
pdata = Pdata(getFile('image.gif').read())
fi = NamedBlobImage(pdata, filename=u'image.gif')
self.assertEqual(303, fi.getSize())
def test_str_storable(self):
fi = NamedBlobImage(getFile('image.gif'), filename=u'image.gif')
self.assertEqual(303, fi.getSize())
