I have a imaging tool which allows a photographer to upload a file. After uploading I want to check if the uploaded image is indeed a valid JPEG file.
So I wrote the following validate function:
def validate_JPG(self, image): ''' JPEG validation check. ''' # Since PIL offers a more rubust check to validate if the image # is an JPEG this is used instead of checking the file header. try: img = Image.open(image) if img.format != 'JPEG': raise JPEGValidationFailed() else: return True except IOError, e: self.logger.debug('Error in the JPG validation: {}'.format(e)) return False The function is called from the upload view which takes the image:
uploaded_file = self.request.FILES.get('image_file') image_checksum = sha256(uploaded_file.read()).hexdigest() if Photos.objects.filter(image_checksum=image_checksum).exists(): return Response({ 'uploadError': 'Image already exists.' }, status=status.HTTP_409_CONFLICT,) try: self.logger.debug('Parsing: IPTC and EXIF') exif, iptc = self.data_parser.process_file(uploaded_file) except JPEGValidationFailed, e: raise serializers.ValidationError({ 'uploadError': str(e) }) except Exception, e: self.logger.error('Error in parsing the IPTC and EXIF data: {}'.format(e)) raise serializers.ValidationError({ 'uploadError': 'Something has gone wrong.' }) This code has been running happily but somehow it is failing now.. The Pillow library is used, Pillow==3.0.0 but also updating to the latest version does not work.
The following error is encountered:
cannot identify image file <TemporaryUploadedFile: YV180707_7856.jpg (image/jpeg)>
Also doing image.seek(0) does not work.
Can someone help me?
