Remove some images from a mail message

[Dave Angel]

On 04/21/2013 01:31 PM, Jason Friedman wrote:
> I will be receiving email that contains, say, 10 images, and I want to
> forward that message on after removing, say, 5 of those images.  I will
> remove based on size, for example 1679 bytes.  I am aware that other images
> besides the unwanted ones could be 1679 bytes but this is unlikely and the
> impact of mistakes is small.
>
> I have figured out how to compose and send an email message from parts:
>   from, to, subject, and some images.  I was planning to read the incoming
> message, write the images I want to keep to files, then use those files to
> construct the outgoing message.
>
> I cannot figure out how to read the incoming message and extract the images.
>
> message_in = email.message_from_binary_file(open(file_name, "rb"))
> for part in message_in.walk():
>      print("-" * 80)
>      print("type: " + part.get_content_maintype())
>      for key, value in part.items():
>          print("key: " + key)
>          print("value: " + value)
>
> -------------------------
>
> type: multipart
> key: Return-Path
> value: <jfriedman at mycompany.com>
> key: X-Original-To
> value: myuser at myhost
>
> ...
>
> key: Content-Type
> value: multipart/alternative;
>          boundary="_000_A9E5330AAB8D0D4E8F9372F872EE8504010458F671hostden_"
>
> --_000_A9E5330AAB8D0D4E8F9372F872EE85040104591ECChostden_--
>
> --_010_A9E5330AAB8D0D4E8F9372F872EE85040104591ECChostden_
> Content-Type: image/png; name="image001.png"
> Content-Description: image001.png
> Content-Disposition: inline; filename="image001.png"; size=9257;
>          creation-date="Mon, 15 Apr 2013 17:48:29 GMT";
>          modification-date="Mon, 15 Apr 2013 17:48:29 GMT"
> Content-ID: <image001.png at 01CE39DF.E9801A60>
> Content-Transfer-Encoding: base64
>
> iVBORw0KGgoAAAANSUhEUgAAANcAAAAwCAYAAACCPO+PAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJ
> bWFnZVJlYWR5ccllPAAAI8tJREFUeNrsXQlYVdUW/u+Fey+TCqgJTqA4i4rzjDM4pGaZU449yxAM
> Xy+bfY1WZpmZkpapZVpZmpmiKCqoOOGEGjmLI6AioMxcuO/f5+wLl0HFqVd59/ftz3sO+5yzzz7r
>
> ...
>
> ----------------------
>
> I'm guessing my image is in there, how do I get it out?
>
>
>

One possibility, see the base64 module:

http://docs.python.org/library/base64.html

-- 
DaveA