/usr/lib/python2.7/dist-packages/postfix.py is in bley 2.0.0-2.
This file is owned by root:root, with mode 0o644.
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# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# SUCH DAMAGE.
from twisted.protocols.basic import LineOnlyReceiver
from twisted.internet.protocol import Factory
from twisted.internet.interfaces import IHalfCloseableProtocol
from zope.interface import implements
import ipaddr
class PostfixPolicy(LineOnlyReceiver):
'''Basic implementation of a Postfix policy service.'''
implements(IHalfCloseableProtocol)
required_params = []
def __init__(self):
self.params = {}
self.delimiter = '\n'
def lineReceived(self, line):
'''Parse stuff from Postfix and call check_policy() afterwards.'''
line = line.strip().lower()
if line == '':
if len(self.params) > 0:
valid_request = True
for p in self.required_params:
if p not in self.params:
valid_request = False
break
if valid_request:
self.check_policy()
else:
self.send_action('DUNNO')
self.params = {}
else:
try:
(pkey, pval) = line.split('=', 1)
try:
pval = pval.decode('utf-8', 'ignore')
pval = pval.encode('us-ascii', 'ignore')
except:
pass
if pkey == 'client_address':
pval = ipaddr.IPAddress(pval).exploded
self.params[pkey] = pval
except:
print 'Could not parse "%s"' % line
def check_policy(self):
'''Check the incoming mail based on our policy and tell Postfix
about our decision.
You probably want to override this one with a function that does
something useful.
'''
self.send_action('DUNNO')
def send_action(self, action='DUNNO'):
'''Send action back to Postfix.
@type action: string
@param action: the action to be sent to Postfix (default: 'DUNNO')
'''
self.sendLine('action=%s\n' % action)
if self.factory.exim_workaround:
self.transport.loseConnection()
def readConnectionLost(self):
pass
def writeConnectionLost(self):
self.transport.loseConnection()
class PostfixPolicyFactory(Factory):
protocol = PostfixPolicy
exim_workaround = False
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