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"""Mail to news gateway script. Copyright 2000 Cosimo Alfarano
Author: Cosimo Alfarano
Date: September 16 2000
mail2news.py - (C) 2000 by Cosimo Alfarano <Alfarano@Students.CS.UniBo.It>
You can use this software under the terms of the GPL. If we meet some day,
and you think this stuff is worth it, you can buy me a beer in return.
Thanks to md for this useful formula. Beer is beer.
Gets news email and sends it via SMTP.
class mail2news is hopefully conform to rfc850.
"""
from collections import OrderedDict
import email
import logging
import os
import nntplib
from StringIO import StringIO
from re import findall
from socket import gethostbyaddr, gethostname
import sys
#logging.basicConfig(level=logging.DEBUG)
# This is the single source of Truth
# Yes, it is awkward to have it assymetrically here
# and not in news2mail as well.
VERSION = '0.9.9'
DESC = "The Python Gateway Script: news2mail mail2news gateway"
class mail2news(object):
"""news to mail gateway class"""
def __init__(self):
# newsgroups = None # Newsgroups: local.test,local.moderated...
# approved = None # Approved: kame@aragorn.lorien.org
if 'NNTPHOST' in os.environ:
self.newsserver = os.environ['NNTPHOST']
else:
self.newsserver = 'localhost'
self.port = 119
self.user = None
self.password = None
self.hostname = gethostbyaddr(gethostname())[0]
self.heads_dict, self.smtpheads, self.nntpheads = {}, {}, {}
self.headers = []
self.message = None
def readfile(self, opt):
self.message = email.message_from_file(sys.stdin)
if (len(self.message) == 0) \
and self.message.get_payload().startswith('/'):
msg_file_name = self.message.get_payload().strip()
del self.message
with open(msg_file_name, 'r') as msg_file:
self.message = email.message_from_file(msg_file)
# introduce nntpheads
if opt.newsgroup != '':
self.nntpheads['Newsgroups'] = opt.newsgroup
if opt.approver != '':
self.nntpheads['Approved'] = opt.approver
return 1
@staticmethod
def puthead(from_dict, out_list, key):
"""private, x-form dict entries in out_list entries
"""
if key in from_dict:
out_list.append(key + ': ' + from_dict.get(key))
else:
return 0
return 1
def mergeheads(self):
"""make a unique headers dictionary from NNTP and SMTP
single headers dictionaries."""
self.heads_dict = OrderedDict(self.message)
self.heads_dict.update(self.nntpheads)
return self.heads_dict
def renameheads(self):
"""rename headers such as Resent-*: to X-Resent-*:
headers renamed are useless or not rfc 977/850 copliant
handles References/In-Reply-To headers
"""
try:
for key in self.heads_dict.keys():
if(key[:7] in ['Resent-']):
if ('X-' + key) in self.heads_dict:
self.heads_dict['X-Original-' + key] = \
self.heads_dict['X-' + key]
self.heads_dict['X-' + key] = self.heads_dict[key]
del self.heads_dict[key]
# In rfc822 References: is considered, but many MUA doen't put it.
if ('References' not in self.heads_dict) and \
('In-Reply-To' in self.heads_dict):
print self.heads_dict['In-Reply-To']
# some MUA uses msgid without '<' '>'
# ref = findall('([^\s<>\']+@[^\s<>;:\']+)', \
# but I prefer use RFC standards
ref = findall('(<[^<>]+@[^<>]+>)',
self.heads_dict['In-Reply-To'])
# if found, keep first element that seems a Msg-ID.
if(ref and len(ref)):
self.heads_dict['References'] = '%s\n' % ref[0]
except KeyError, message:
print message
return self.heads_dict
def removeheads(self, heads=None):
"""remove headers like Xref: Path: Lines:
"""
try:
# removing some others useless headers .... (From is not From:)
rmheads = ['Received', 'From ', 'NNTP-Posting-Host',
'X-Trace', 'X-Compliants-To', 'NNTP-Posting-Date']
if(heads):
rmheads.append(heads)
for head in rmheads:
if head in self.heads_dict:
del self.heads_dict[head]
if 'Message-Id' not in self.heads_dict:
if 'Message-id' in self.heads_dict:
self.heads_dict['Message-Id'] = \
self.heads_dict['Message-id']
del(self.heads_dict['Message-id'])
if 'Message-ID' in self.heads_dict:
self.heads_dict['Message-Id'] = \
self.heads_dict['Message-ID']
del(self.heads_dict['Message-ID'])
# If message-id is not present, I generate it
if 'Message-Id' not in self.heads_dict:
msgid = '<pyg.%d@tuchailepuppapera.org>\n' % (os.getpid())
self.heads_dict['Message-Id'] = msgid
except KeyError, message:
print message
return self.heads_dict
def sortheads(self):
"""make list sorted by heads: From: To: Subject: first,
others, X-*, X-Resent-* last"""
# put at top
head_set = ('Newsgroups', 'From', 'To', 'X-To', 'Cc', 'Subject',
'Date', 'Approved', 'References', 'Message-Id')
logging.debug('self.heads_dict = %s', self.heads_dict)
for k in head_set:
self.puthead(self.heads_dict, self.headers, k)
for k in self.heads_dict.keys():
if not k.startswith('X-') and not k.startswith('X-Resent-') \
and k not in head_set:
self.puthead(self.heads_dict, self.headers, k)
for k in self.heads_dict.keys():
if k.startswith('X-'):
self.puthead(self.heads_dict, self.headers, k)
for k in self.heads_dict.keys():
if k.startswith('X-Resent-'):
self.puthead(self.heads_dict, self.headers, k)
logging.debug('self.headers = %s', self.headers)
return self.headers
def sendemail(self):
"Talk to NNTP server and try to send email."
# readermode must be True, otherwise we don't have POST command.
server = nntplib.NNTP(self.newsserver, self.port, self.user,
self.password, readermode=True)
msg = self.message.copy()
for hdr in msg.keys():
del msg[hdr]
for key, value in self.headers.items:
msg.add_header(key, value)
str_file = StringIO(msg.as_string())
server.post(str_file)
server.quit()
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