78 lines
3.0 KiB
Python
78 lines
3.0 KiB
Python
#!/usr/bin/env python3
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"""Send the contents of a directory as a MIME message."""
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import os
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import smtplib
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# For guessing MIME type based on file name extension
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import mimetypes
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from argparse import ArgumentParser
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from email.message import EmailMessage
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from email.policy import SMTP
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def main():
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parser = ArgumentParser(description="""\
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Send the contents of a directory as a MIME message.
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Unless the -o option is given, the email is sent by forwarding to your local
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SMTP server, which then does the normal delivery process. Your local machine
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must be running an SMTP server.
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""")
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parser.add_argument('-d', '--directory',
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help="""Mail the contents of the specified directory,
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otherwise use the current directory. Only the regular
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files in the directory are sent, and we don't recurse to
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subdirectories.""")
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parser.add_argument('-o', '--output',
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metavar='FILE',
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help="""Print the composed message to FILE instead of
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sending the message to the SMTP server.""")
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parser.add_argument('-s', '--sender', required=True,
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help='The value of the From: header (required)')
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parser.add_argument('-r', '--recipient', required=True,
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action='append', metavar='RECIPIENT',
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default=[], dest='recipients',
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help='A To: header value (at least one required)')
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args = parser.parse_args()
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directory = args.directory
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if not directory:
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directory = '.'
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# Create the message
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msg = EmailMessage()
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msg['Subject'] = f'Contents of directory {os.path.abspath(directory)}'
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msg['To'] = ', '.join(args.recipients)
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msg['From'] = args.sender
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msg.preamble = 'You will not see this in a MIME-aware mail reader.\n'
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for filename in os.listdir(directory):
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path = os.path.join(directory, filename)
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if not os.path.isfile(path):
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continue
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# Guess the content type based on the file's extension. Encoding
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# will be ignored, although we should check for simple things like
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# gzip'd or compressed files.
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ctype, encoding = mimetypes.guess_type(path)
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if ctype is None or encoding is not None:
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# No guess could be made, or the file is encoded (compressed), so
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# use a generic bag-of-bits type.
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ctype = 'application/octet-stream'
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maintype, subtype = ctype.split('/', 1)
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with open(path, 'rb') as fp:
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msg.add_attachment(fp.read(),
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maintype=maintype,
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subtype=subtype,
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filename=filename)
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# Now send or store the message
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if args.output:
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with open(args.output, 'wb') as fp:
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fp.write(msg.as_bytes(policy=SMTP))
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else:
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with smtplib.SMTP('localhost') as s:
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s.send_message(msg)
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if __name__ == '__main__':
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main()
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