def from_file(cls, file, user, site, desc=''):
'''
Construct an ImageCopy from an uploaded file
'''
img = ImageCopy(owner=user, site=site, description=desc)
# strip exif from given image
file.seek(0)
exif = pyexiv2.ImageMetadata.from_buffer(file.read())
exif.read()
exif_dict = dict()
for k in exif.exif_keys:
if exif[k].human_value:
try:
exif_dict[exif[k].label] = exif[k].human_value.decode('utf-8')
except UnicodeDecodeError:
# ignore invalid chars
pass
del exif[k]
img.exif_str = json.dumps(exif_dict)
img.file = ImageFile.from_file(file)
img.save()
img.id_str = struk.int2str(img.id)
img.save()
return img
def from_file(cls, file):
'''
Construct an ImageFile from file
'''
md5 = cls.md5sum(file)
try:
imgf = cls.objects.filter(md5=md5).get()
except ImageFile.DoesNotExist:
imgf = cls(md5=md5)
imgf.save()
try:
imgf.id_str = struk.int2str(imgf.id)
imgf.file = FieldFile(imgf, imgf.file, imgf.gen_filename())
imgf.save()
dir = os.path.dirname(imgf.file.path)
if not os.path.exists(dir):
os.makedirs(dir)
# make sure converted to jpg
if isinstance(file, InMemoryUploadedFile):
tmp = tempfile.NamedTemporaryFile()
file.seek(0)
tmp.write(file.read())
tmp.flush()
img = Image.open(tmp.name)
else: # TemporaryUploadedFile or File
img = Image.open(file.file.name)
#img.save(imgf.file.path, quality=95, optimize=True)
img.save(imgf.file.path, quality=95)
#img.save(imgf.file.path)
imgf.width_f = img.size[0]
imgf.height_f = img.size[1]
del img
imgf.resample()
# save updated width and height of sizes
imgf.save()
except:
imgf.delete()
raise
return imgf
def _post_post_save(instance, created, **kwargs):
''''''
if not instance.id_str:
instance.id_str = struk.int2str(instance.id)
instance.save()