113 lines
3.2 KiB
Python
113 lines
3.2 KiB
Python
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# -*- test-case-name: twisted.test.test_postfix -*-
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# Copyright (c) Twisted Matrix Laboratories.
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# See LICENSE for details.
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"""
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Postfix mail transport agent related protocols.
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"""
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import sys
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import UserDict
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import urllib
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from twisted.protocols import basic
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from twisted.protocols import policies
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from twisted.internet import protocol, defer
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from twisted.python import log
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# urllib's quote functions just happen to match
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# the postfix semantics.
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def quote(s):
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return urllib.quote(s)
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def unquote(s):
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return urllib.unquote(s)
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class PostfixTCPMapServer(basic.LineReceiver, policies.TimeoutMixin):
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"""Postfix mail transport agent TCP map protocol implementation.
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Receive requests for data matching given key via lineReceived,
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asks it's factory for the data with self.factory.get(key), and
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returns the data to the requester. None means no entry found.
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You can use postfix's postmap to test the map service::
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/usr/sbin/postmap -q KEY tcp:localhost:4242
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"""
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timeout = 600
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delimiter = '\n'
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def connectionMade(self):
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self.setTimeout(self.timeout)
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def sendCode(self, code, message=''):
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"Send an SMTP-like code with a message."
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self.sendLine('%3.3d %s' % (code, message or ''))
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def lineReceived(self, line):
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self.resetTimeout()
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try:
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request, params = line.split(None, 1)
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except ValueError:
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request = line
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params = None
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try:
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f = getattr(self, 'do_' + request)
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except AttributeError:
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self.sendCode(400, 'unknown command')
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else:
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try:
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f(params)
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except:
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self.sendCode(400, 'Command %r failed: %s.' % (request, sys.exc_info()[1]))
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def do_get(self, key):
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if key is None:
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self.sendCode(400, 'Command %r takes 1 parameters.' % 'get')
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else:
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d = defer.maybeDeferred(self.factory.get, key)
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d.addCallbacks(self._cbGot, self._cbNot)
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d.addErrback(log.err)
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def _cbNot(self, fail):
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self.sendCode(400, fail.getErrorMessage())
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def _cbGot(self, value):
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if value is None:
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self.sendCode(500)
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else:
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self.sendCode(200, quote(value))
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def do_put(self, keyAndValue):
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if keyAndValue is None:
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self.sendCode(400, 'Command %r takes 2 parameters.' % 'put')
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else:
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try:
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key, value = keyAndValue.split(None, 1)
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except ValueError:
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self.sendCode(400, 'Command %r takes 2 parameters.' % 'put')
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else:
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self.sendCode(500, 'put is not implemented yet.')
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class PostfixTCPMapDictServerFactory(protocol.ServerFactory,
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UserDict.UserDict):
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"""An in-memory dictionary factory for PostfixTCPMapServer."""
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protocol = PostfixTCPMapServer
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class PostfixTCPMapDeferringDictServerFactory(protocol.ServerFactory):
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"""An in-memory dictionary factory for PostfixTCPMapServer."""
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protocol = PostfixTCPMapServer
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def __init__(self, data=None):
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self.data = {}
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if data is not None:
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self.data.update(data)
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def get(self, key):
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return defer.succeed(self.data.get(key))
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