def testSmallerImageObject(self):
image, buffer = self._make_image(width=641, height=481)
buffer.seek(0, os.SEEK_END)
orig_size = buffer.tell()
buffer.seek(0)
cimage = CachedImage("test_small")
metadata = {'content_type': 'image/png'}
cimage.cache_put(buffer, metadata)
smaller = IMAGE_SIZE_ORDERING[0:7]
bigger = IMAGE_SIZE_ORDERING[7:-1] # skip the original
for size_key in smaller:
self.assertTrue(cimage.can_size(size_key))
cmeta, cstream = cimage.get(size_key=size_key)
self.assertEqual(cmeta['size_key'], size_key)
cstream.seek(0, os.SEEK_END)
stream_size = cstream.tell()
self.assertLess(stream_size, orig_size)
for size_key in bigger:
self.assertFalse(cimage.can_size(size_key),
msg="size key: %s shouldn't be sized" % size_key)
cmeta, cstream = cimage.get(size_key=size_key)
cstream.seek(0, os.SEEK_END)
stream_size = cstream.tell()
self.assertEqual(stream_size, orig_size)
self.assertNotEqual(cmeta['size_key'], size_key)
self.assertEqual(cmeta['size_key'], OBJECT_ORIGINAL)
def get_cached_case_attachment(domain, case_id, attachment_id, is_image=False):
attachment_cache_key = "%(case_id)s_%(attachment)s" % {
"case_id": case_id,
"attachment": attachment_id
}
from dimagi.utils.django.cached_object import CachedObject, CachedImage
cobject = CachedImage(attachment_cache_key) if is_image else CachedObject(attachment_cache_key)
if not cobject.is_cached():
content = CaseAccessors(domain).get_attachment_content(case_id, attachment_id)
stream = StringIO(content.content_body)
metadata = {'content_type': content.content_type}
cobject.cache_put(stream, metadata)
return cobject
def get_cached_case_attachment(domain, case_id, attachment_id, is_image=False):
attachment_cache_key = "%(case_id)s_%(attachment)s" % {
"case_id": case_id,
"attachment": attachment_id
}
from dimagi.utils.django.cached_object import CachedObject, CachedImage
cobject = CachedImage(attachment_cache_key) if is_image else CachedObject(attachment_cache_key)
if not cobject.is_cached():
content = CaseAccessors(domain).get_attachment_content(case_id, attachment_id)
stream = StringIO(content.content_body)
metadata = {'content_type': content.content_type}
cobject.cache_put(stream, metadata)
return cobject
def testSmallerImageObject(self):
image, buffer = self._make_image(width=641, height=481)
buffer.seek(0, os.SEEK_END)
orig_size = buffer.tell()
buffer.seek(0)
cimage = CachedImage("test_small")
metadata = {'content_type': 'image/png'}
cimage.cache_image(buffer, metadata)
smaller = IMAGE_SIZE_ORDERING[0:7]
bigger = IMAGE_SIZE_ORDERING[7:-1] # skip the original
for size_key in smaller:
self.assertTrue(cimage.can_size(size_key))
cmeta, cstream = cimage.get_size(size_key)
self.assertEqual(cmeta['size_key'], size_key)
cstream.seek(0, os.SEEK_END)
stream_size = cstream.tell()
self.assertLess(stream_size, orig_size)
for size_key in bigger:
self.assertFalse(cimage.can_size(size_key), msg="size key: %s shouldn't be sized" % size_key)
cmeta, cstream = cimage.get_size(size_key)
cstream.seek(0, os.SEEK_END)
stream_size = cstream.tell()
self.assertEqual(stream_size, orig_size)
self.assertNotEqual(cmeta['size_key'], size_key)
self.assertEqual(cmeta['size_key'], OBJECT_ORIGINAL)
def testHugeImageObject(self):
image, buffer = self._make_image()
buffer.seek(0, os.SEEK_END)
orig_size = buffer.tell()
buffer.seek(0)
cimage = CachedImage("test_huge")
metadata = {'content_type': 'image/png'}
cimage.cache_image(buffer, metadata)
for size in IMAGE_SIZE_ORDERING:
self.assertTrue(cimage.can_size(size))
cmeta, cstream = cimage.get_size(size)
self.assertEqual(cmeta['size_key'], size)
cstream.seek(0, os.SEEK_END)
stream_size = cstream.tell()
if size != OBJECT_ORIGINAL:
self.assertLess(stream_size, orig_size)
else:
self.assertEqual(stream_size, orig_size)
def testHugeImageObject(self):
image, buffer = self._make_image()
buffer.seek(0, os.SEEK_END)
orig_size = buffer.tell()
buffer.seek(0)
cimage = CachedImage("test_huge")
metadata = {'content_type': 'image/png'}
cimage.cache_put(buffer, metadata)
for size in IMAGE_SIZE_ORDERING:
self.assertTrue(cimage.can_size(size))
cmeta, cstream = cimage.get(size_key=size)
self.assertEqual(cmeta['size_key'], size)
cstream.seek(0, os.SEEK_END)
stream_size = cstream.tell()
if size != OBJECT_ORIGINAL:
self.assertLess(stream_size, orig_size)
else:
self.assertEqual(stream_size, orig_size)
def fetch_case_image(cls, case_id, attachment_key, filesize_limit=0, width_limit=0, height_limit=0, fixed_size=None):
"""
Return (metadata, stream) information of best matching image attachment.
attachment_key is the case property of the attachment
attachment filename is the filename of the original submission - full extension and all.
"""
if fixed_size is not None:
size_key = fixed_size
else:
size_key = OBJECT_ORIGINAL
constraint_dict = {}
if filesize_limit:
constraint_dict['content_length'] = filesize_limit
if height_limit:
constraint_dict['height'] = height_limit
if width_limit:
constraint_dict['width'] = width_limit
do_constrain = bool(constraint_dict)
# if size key is None, then one of the limit criteria are set
attachment_cache_key = "%(case_id)s_%(attachment)s" % {
"case_id": case_id,
"attachment": attachment_key,
}
cached_image = CachedImage(attachment_cache_key)
meta, stream = cls.cache_and_get_object(cached_image, case_id, attachment_key, size_key=size_key)
# now that we got it cached, let's check for size constraints
if do_constrain:
#check this size first
#see if the current size matches the criteria
def meets_constraint(constraints, meta):
for c, limit in constraints.items():
if meta[c] > limit:
return False
return True
if meets_constraint(constraint_dict, meta):
#yay, do nothing
pass
else:
#this meta is no good, find another one
lesser_keys = IMAGE_SIZE_ORDERING[0:IMAGE_SIZE_ORDERING.index(size_key)]
lesser_keys.reverse()
is_met = False
for lesser_size in lesser_keys:
less_meta, less_stream = cached_image.get_size(lesser_size)
if meets_constraint(constraint_dict, less_meta):
meta = less_meta
stream = less_stream
is_met = True
break
if not is_met:
meta = None
stream = None
return meta, stream
def fetch_case_image(cls,
case_id,
attachment_key,
filesize_limit=0,
width_limit=0,
height_limit=0,
fixed_size=None):
"""
Return (metadata, stream) information of best matching image attachment.
attachment_key is the case property of the attachment
attachment filename is the filename of the original submission - full extension and all.
"""
if fixed_size is not None:
size_key = fixed_size
else:
size_key = OBJECT_ORIGINAL
constraint_dict = {}
if filesize_limit:
constraint_dict['content_length'] = filesize_limit
if height_limit:
constraint_dict['height'] = height_limit
if width_limit:
constraint_dict['width'] = width_limit
do_constrain = bool(constraint_dict)
# if size key is None, then one of the limit criteria are set
attachment_cache_key = "%(case_id)s_%(attachment)s" % {
"case_id": case_id,
"attachment": attachment_key,
}
cached_image = CachedImage(attachment_cache_key)
meta, stream = cls.cache_and_get_object(cached_image,
case_id,
attachment_key,
size_key=size_key)
# now that we got it cached, let's check for size constraints
if do_constrain:
#check this size first
#see if the current size matches the criteria
def meets_constraint(constraints, meta):
for c, limit in constraints.items():
if meta[c] > limit:
return False
return True
if meets_constraint(constraint_dict, meta):
#yay, do nothing
pass
else:
#this meta is no good, find another one
lesser_keys = IMAGE_SIZE_ORDERING[0:IMAGE_SIZE_ORDERING.
index(size_key)]
lesser_keys.reverse()
is_met = False
for lesser_size in lesser_keys:
less_meta, less_stream = cached_image.get_size(lesser_size)
if meets_constraint(constraint_dict, less_meta):
meta = less_meta
stream = less_stream
is_met = True
break
if not is_met:
meta = None
stream = None
return meta, stream