To answer my own question, I now moved the validation code to the form
and create a PIL image using
Image.open(StringIO(uploadedFile.content)):
===forms.py
class ImageForm(forms.ModelForm):
def __init__(self, *args, **kwargs):
super(ImageForm, self).__init__(*args, **kwargs)
def clean_image(self):
uploadedFile = self.cleaned_data['image']
if uploadedFile:
from PIL import Image
from cStringIO import StringIO
try:
image = Image.open(StringIO(uploadedFile.content))
image.load()
image.verify()
if (image.size[0] > maxImgWidth) or (image.size[1] >
maxImgHeight):
raise
return self.cleaned_data['image']
except:
raise forms.ValidationError('Image is too big.')
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