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1 # Copyright (C) 2001-2006 Python Software Foundation
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2 # Author: Barry Warsaw
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3 # Contact: email-sig@python.org
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4
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5 """Class representing image/* type MIME documents."""
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6
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7 __all__ = ['MIMEImage']
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8
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9 import imghdr
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10
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11 from email import encoders
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12 from email.mime.nonmultipart import MIMENonMultipart
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13
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14
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15
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16 class MIMEImage(MIMENonMultipart):
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17 """Class for generating image/* type MIME documents."""
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18
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19 def __init__(self, _imagedata, _subtype=None,
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20 _encoder=encoders.encode_base64, *, policy=None, **_params):
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21 """Create an image/* type MIME document.
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22
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23 _imagedata is a string containing the raw image data. If this data
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24 can be decoded by the standard Python `imghdr' module, then the
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25 subtype will be automatically included in the Content-Type header.
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26 Otherwise, you can specify the specific image subtype via the _subtype
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27 parameter.
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28
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29 _encoder is a function which will perform the actual encoding for
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30 transport of the image data. It takes one argument, which is this
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31 Image instance. It should use get_payload() and set_payload() to
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32 change the payload to the encoded form. It should also add any
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33 Content-Transfer-Encoding or other headers to the message as
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34 necessary. The default encoding is Base64.
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35
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36 Any additional keyword arguments are passed to the base class
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37 constructor, which turns them into parameters on the Content-Type
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38 header.
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39 """
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40 if _subtype is None:
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41 _subtype = imghdr.what(None, _imagedata)
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42 if _subtype is None:
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43 raise TypeError('Could not guess image MIME subtype')
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44 MIMENonMultipart.__init__(self, 'image', _subtype, policy=policy,
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45 **_params)
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46 self.set_payload(_imagedata)
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47 _encoder(self)
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