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Python Source  |  2012-05-27  |  1.1 KB  |  42 lines
  1. '''
  2.     Takes care about pictures formats
  3. '''
  4.  
  5. import parser
  6.  
  7.  
  8. class JpegStripper(parser.GenericParser):
  9.     '''
  10.         represents a jpeg file
  11.     '''
  12.     def _should_remove(self, field):
  13.         '''
  14.             return True if the field is compromizing
  15.         '''
  16.         field_list = frozenset(['start_image', 'app0', 'start_frame',
  17.                 'start_scan', 'data', 'end_image'])
  18.         if field.name in field_list:
  19.             return False
  20.         elif field.name.startswith('quantization['):
  21.             return False
  22.         elif field.name.startswith('huffman['):
  23.             return False
  24.         return True
  25.  
  26.  
  27. class PngStripper(parser.GenericParser):
  28.     '''
  29.         represents a png file
  30.         see : http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/PNG.html
  31.     '''
  32.     def _should_remove(self, field):
  33.         '''
  34.             return True if the field is compromizing
  35.         '''
  36.         field_list = frozenset(['id', 'header', 'physical', 'end'])
  37.         if field.name in field_list:
  38.             return False
  39.         if field.name.startswith('data['):
  40.             return False
  41.         return True
  42.