spamotron/mailing.py

238 lines
6.3 KiB
Python
Executable File

#! /usr/bin/env python3
# (C) Olivier Berger 2001-2002
# (C) François Poulain 2019
#
# 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 2 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
#
# This program is used to mail a message to several recipients, thus
# providing customization for each recipient.
import sys, getopt, re
import smtplib, time, mimetypes
from email.header import Header
from email.message import EmailMessage
#
# displays usage of the program, then quit
#
def usage(returncode):
print(
"""SYNTAX:
""",
sys.argv[0],
""" -t tofile -b bodyfile [-p attachedfile]
tofile : sort of CSV file containing addresses of recipients
bodyfile : template of the mail to be sent
attachedfile : optionnal attachment
""",
)
sys.exit(returncode)
TOFILE = None
BODYFILE = None
JOINFILE = None
# read the recipients file where values are separated by | characters
def read_recipients():
recipientfile = open(TOFILE)
lines = recipientfile.readlines()
return [line[:-1].split("|") for line in lines]
def read_body():
bodyfile = open(BODYFILE)
body = ""
for line in bodyfile.readlines():
body = body + line
return body
def read_join():
try:
with open(JOINFILE, "rb") as fp:
ctype, encoding = mimetypes.guess_type(JOINFILE)
if ctype is None or encoding is not None:
ctype = "application/octet-stream"
maintype, subtype = ctype.split("/", 1)
metadata = {
"filename": JOINFILE,
"maintype": maintype,
"subtype": subtype,
}
return (fp.read(), metadata)
except Exception as e:
print("read error: %s" % e)
exit(1)
def replace_values(bodytemplate, values):
body = bodytemplate
for i in range(len(values)):
i = i + 1
pattern = "${{%02d}}" % i
body = body.replace(pattern, values[i - 1])
return body
# patterns for header of the mail
FROMPATTERN = re.compile(r"^From: *(.*)")
SUBJECTPATTERN = re.compile(r"^Subject: *(.*)")
CCPATTERN = re.compile(r"^Cc: *(.*)")
BCCPATTERN = re.compile(r"^Bcc: *(.*)")
REPLYTOPATTERN = re.compile(r"^Reply-To: *(.*)")
def qencode_subject(message):
subjectmatches = re.search(r"^Subject: *(.*)$", message, re.MULTILINE)
if subjectmatches == None:
return message
subjectstr = subjectmatches.group(1)
h = Header(subjectstr, "utf-8")
qsubjectstr = h.encode()
return message.replace(subjectstr, qsubjectstr, 1)
def send_message(message, to, attachment):
lines = message.split("\n")
# identify headers in the template
fromvalue = None
subjectvalue = None
ccvalue = None
bccvalue = None
replytovalue = None
for index, line in enumerate(lines):
if not line:
body = "\n".join(lines[index + 1 :])
break
frommatches = FROMPATTERN.match(line)
subjectmatches = SUBJECTPATTERN.match(line)
ccmatches = CCPATTERN.match(line)
bccmatches = BCCPATTERN.match(line)
replytomatches = REPLYTOPATTERN.match(line)
if frommatches:
fromvalue = frommatches.group(1)
if subjectmatches:
subjectvalue = subjectmatches.group(1)
if ccmatches:
ccvalue = ccmatches.group(1)
if bccmatches:
bccvalue = bccmatches.group(1)
if replytomatches:
replytovalue = replytomatches.group(1)
# lists all addresses to which the mail will be sent
dests = [to]
if ccvalue:
dests.append(ccvalue)
if bccvalue:
dests.append(bccvalue)
msg = EmailMessage()
msg["Subject"] = subjectvalue
msg["From"] = fromvalue
msg["To"] = to
if replytovalue:
msg["Reply-To"] = replytovalue
if ccvalue:
msg["Cc"] = ccvalue
msg.set_content(body)
if attachment:
msg.add_attachment(attachment[0], **attachment[1])
print(
"Sending : %s, from %s to %s, dests : %s"
% (subjectvalue, fromvalue, dests[0], repr(dests))
)
# sending the mail to its recipients using the local mailer via SMTP
server = smtplib.SMTP("localhost", "25")
server.set_debuglevel(1)
server.send_message(msg)
server.quit()
if __name__ == "__main__":
# handle options of the program
try:
opts, args = getopt.getopt(sys.argv[1:], "t:b:p:")
except getopt.error as msg:
print("getopt error: %s" % msg)
usage(1)
for name, value in opts:
if name == "-t":
TOFILE = value
elif name == "-b":
BODYFILE = value
elif name == "-p":
JOINFILE = value
else:
print("argument: ", name, " invalid")
usage(1)
if not TOFILE or not BODYFILE:
usage(1)
# read the recipients file
sets = read_recipients()
# read the template of the mail
bodytemplate = read_body()
# optionnaly read the attachment of the mail
attachment = None
if JOINFILE:
attachment = read_join()
# counter to be able to pause each 10 mails send
counter = 0
# send mail to each recipient
for set in sets:
values = set
# the recipient is always in first column
recipient = values[0]
# replace substitution variables in the template for each recipient
body = replace_values(bodytemplate, values)
# send message
send_message(body, recipient, attachment)
# pause every 10 mails for 5 secs so that the MTA doesn't explode
counter = counter + 1
if counter >= 10:
counter = 0
print("suspending execution for 5 secs")
time.sleep(5)