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@frafra frafra/mbox2html.py
Last active Sep 13, 2018

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Mailbox to HTML conversion using Python 3 + Jinja2 in less than 100 lines (including GPLv3 license)
#!/usr/bin/env python3
#
# Copyright (C) 2016 - Francesco Frassinelli
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# External dependency
import jinja2
import argparse
import collections
import email.parser, email.policy
import mailbox
import os.path
# Default html template
# Jinja2 syntax: http://jinja.pocoo.org/docs/dev/
template = jinja2.Template("""
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>{{ title }}</title>
</head>
<body>
{% for message in messages %}
{% for key, value in message.header %}
{% if key in header_filter %}
<div><strong>{{ key }}</strong>: {{ value }}</div>
{% endif %}
{% endfor %}
<hr/>
{% if message.is_html %}
{{ message.body|safe }}
{% else %}
<pre>{{ message.body }}</pre>
{% endif %}
{% if not loop.last %}
<hr/>
{% endif %}
{% endfor %}
</body>
</html>
""".strip(), trim_blocks=True, lstrip_blocks=True, autoescape=True)
# Command line options
parser = argparse.ArgumentParser()
parser.add_argument('-p', '--plain', action='store_true',
help="prefer plain text over html")
parser.add_argument('-o', '--outfile', nargs='?',
type=argparse.FileType('w'),
default='-',
help='output html file')
parser.add_argument('mbox', type=argparse.FileType('r'),
help='mbox file')
args = parser.parse_args()
# Base information and header filters
info = {
'title':os.path.basename(args.mbox.name),
'header_filter':[
'From',
'Date',
],
'messages':[],
}
# Mailbox parser
reverse = -1 if args.plain else 1
preferencelist = ('html', 'plain')[::reverse]
inbox = mailbox.mbox(args.mbox.name)
for index, message in inbox.items():
message_info = collections.defaultdict(dict)
# Message parser
msg_parser = email.parser.BytesFeedParser(policy=email.policy.default)
msg_parser.feed(message.as_bytes())
msg = msg_parser.close()
# Header
message_info['header'] = msg.items()
# Body
simplest = msg.get_body(preferencelist=preferencelist)
message_info['is_html'] = simplest.get_content_type() == 'text/html'
message_info['body'] = simplest.get_content()
# Add result to collection
info['messages'].append(message_info)
# Write to file
args.outfile.write(template.render(info))
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