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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.
"""
import sys
from os import getpid
from socket import gethostbyaddr, gethostname
import string
from re import findall
import nntplib
import pyginfo
class mail2news:
"""news to mail gateway class"""
reader = None # mode reader
# newsgroups = None # Newsgroups: local.test,local.moderated...
# approved = None # Approved: kame@aragorn.lorien.org
newsserver = 'localhost' # no comment :)
port = 119
user = None
password = None
hostname = gethostbyaddr(gethostname())[0]
heads_dict, smtpheads, nntpheads = {}, {}, {}
email, headers, body = [], [], []
def readfile(self, opt):
for line in sys.stdin.readlines():
self.email.append(line)
if(len(self.email) == 1 and self.email[0][0] == '/'):
file = self.email[0][:-1]
del self.email[0]
for line in open(file, 'r').readlines():
self.email.append(line)
# introduce nntpheads
if opt.newsgroup != '':
# TODO put it directly to self.message when we have it
self.nntpheads['Newsgroups:'] = opt.newsgroup + '\n'
if opt.approver != '':
self.nntpheads['Approved:'] = opt.approver + '\n'
return 1
def parseemail(self):
"""get news email from file or stdin and separate heads from body
REMEBER: headers value has '\n' as last char.
Use string[:-1] to ignore newline.
"""
try:
body = 0 # are we in body or in headers?
for line in self.email:
if not body and len(line) == 1:
body = 1 # starts email body section
if not body:
try:
# if it is a multi-line header like Received:
if line[0] not in [' ', '\t']:
try:
head, value = string.split(line, ' ', 1)
except string.index_error:
value = ''
self.smtpheads[head] = value
else:
self.smtpheads[head] = '%s%s' % \
(self.smtpheads[head], line)
except (string.index_error), message:
print('line: %s' % line)
print('(probably missing couple "Header: value" in %s)'
% line)
sys.exit(1)
elif len(line) > 0 and body:
self.body.append(line)
except (string.index_error), message:
print message
sys.exit(1)
return self.smtpheads, self.body
def puthead(self, dict, list, key):
"""private, transform dict entries in list entries
Appends key of dict to list, deleting it from dict.
"""
if key in dict:
list.append(key + ' ' + dict.get(key))
del dict[key]
else:
return 0
return 1
def sortheads(self):
"""make list sorted by heads: From: To: Subject: first,
others, X-*, X-Resent-* last"""
# put at top
set = ('Newsgroups:', 'From:', 'To:', 'X-To:', 'Cc:', 'Subject:',
'Date:', 'Approved:', 'References:', 'Message-Id:')
for k in set:
self.puthead(self.heads_dict, self.headers, k)
for k in self.heads_dict.keys():
if k[:2] != 'X-' and k[:9] != 'X-Resent-' and k not in set:
self.puthead(self.heads_dict, self.headers, k)
for k in self.heads_dict.keys():
if k[:2] == 'X-':
self.puthead(self.heads_dict, self.headers, k)
for k in self.heads_dict.keys():
if k[:9] == 'X-Resent-':
self.puthead(self.heads_dict, self.headers, k)
return self.headers
def mergeheads(self):
"""make a unique headers dictionary from NNTP and SMTP
single headers dictionaries."""
self.heads_dict = {}
try:
for header in self.smtpheads.keys(): # fill it w/ smtp old heads
self.heads_dict[header] = self.smtpheads[header]
# and replace them w/ nntp new heads
for header in self.nntpheads.keys():
self.heads_dict[header] = self.nntpheads[header]
except KeyError, message:
print message
return self.heads_dict
def addheads(self):
"""add new header like X-Gateway:
"""
info = pyginfo.pygsinfo()
try:
self.heads_dict['X-Gateway:'] = info.PROGNAME + ' ' + \
info.PROGDESC + ' - Mail to News\n'
# it is nntpheads stuff
# if(self.newsgroups):
# self.heads_dict['Newsgroups:'] = self.newsgroups
# if(self.approved):
# self.heads_dict['Approved:'] = self.approved
except KeyError, message:
print message
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:
### test
# if(post):
# if(post in self.heads_dict):
# self.heads_dict['X-Original-' + post] = self.heads_dict[post]
#
# self.heads_dict[post] = self.heads_dict[pre]
# del(self.heads_dict[pre])
#
# else:
# if(pre[0:2] == 'X-' and pre in self.heads_dict):
# self.heads_dict['X-Original-' + pre] = self.heads_dict[pre]
# elif(not pre[0:2] == 'X-' and 'X-' + pre in self.heads_dict):
# self.heads_dict['X-' + pre] = self.heads_dict[pre]
# del(self.heads_dict[pre])
### end test
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]
# if('To:' in self.heads_dict):
# self.heads_dict['X-To:'] = self.heads_dict['To:']
# del self.heads_dict['To:']
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 'From' in self.heads_dict: # neither 'From ' nor 'From:'
# del self.heads_dict['From']
# # neither 'From ' nor 'From:'
# if 'NNTP-Posting-Host:' in self.heads_dict:
# del self.heads_dict['']
# if 'Lines:' in self.heads_dict:
# del self.heads_dict['Lines:']
# it is usually set by INN, if ng is moderated...
# if 'Sender:' in self.heads_dict:
# del self.heads_dict['Sender:']
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' % (getpid())
self.heads_dict['Message-Id:'] = msgid
except KeyError, message:
print message
return self.heads_dict
def sendemail(self):
"""Talk to NNTP server and try to send email."""
try:
n = nntplib.NNTP(self.newsserver, self.port, self.user,
self.password)
if(self.reader):
n.putline('mode reader')
resp = n.getline()
print resp
resp = n.shortcmd('POST')
# sett RFC977 2.4.2
if resp[0] != '3':
raise n.error_reply, str(resp)
for line in self.headers:
if not line:
break
if line[-1] == '\n':
line = line[:-1]
if line[:1] == '.':
line = '.' + line
n.putline(line)
for line in self.body:
if not line:
break
if line[-1] == '\n':
line = line[:-1]
if line[:1] == '.':
line = '.' + line
n.putline(line)
n.putline('.')
n.quit()
return None
except (nntplib.error_reply, nntplib.error_temp, nntplib.error_perm,
nntplib.error_proto, nntplib.error_data), message:
return 'NNTP: ' + str(message)
|
