def raise_error(self, status, stdout, stderr):
"""This method may be over-ridden by sub-classes if you need to control
how the relay error is generated. By default, the error raised is a
:class:`~slimta.relay.TransientRelayError` unless the process output
begins with a ``5.X.X`` enhanced status code. This behavior attempts to
mimic the postfix pipe_ daemon.
This method is only called if the subprocess returns a non-zero exit
status.
:param status: The non-zero exit status of the subprocess.
:param stdout: The subprocess's standard output, as received by
:py:meth:`~subprocess.Popen.communicate`.
:type stdout: string
:param stderr: The subprocess's standard error output, as received by
:py:meth:`~subprocess.Popen.communicate`.
:type stderr: string
:raises: :class:`~slimta.relay.TransientRelayError`,
:class:`~slimta.relay.PermanentRelayError`
"""
error_msg = stdout.rstrip() or stderr.rstrip() or 'Delivery failed'
if self._permanent_error_pattern.match(error_msg):
reply = Reply('550', error_msg)
raise PermanentRelayError(error_msg, reply)
else:
reply = Reply('450', error_msg)
raise TransientRelayError(error_msg, reply)
def test_enqueue_wait_partial_relay(self):
env = Envelope(
'*****@*****.**',
['*****@*****.**', '*****@*****.**', '*****@*****.**'])
self.store.write(env, IsA(float)).AndReturn('1234')
self.relay._attempt(env, 0).AndReturn({
'*****@*****.**':
None,
'*****@*****.**':
TransientRelayError('transient', Reply('450', 'transient')),
'*****@*****.**':
PermanentRelayError('permanent', Reply('550', 'permanent'))
})
self.store.increment_attempts('1234')
self.store.set_timestamp('1234', IsA(float))
self.store.set_recipients_delivered('1234', set([0, 2]))
self.mox.ReplayAll()
def backoff(envelope, attempts):
return 0
def no_bounce(envelope, reply):
return None
queue = Queue(self.store,
self.relay,
backoff=backoff,
bounce_factory=no_bounce,
relay_pool=5)
queue.enqueue(env)
queue.relay_pool.join()
def raise_error(self, status, stdout, stderr):
error_msg = stdout.rstrip() or stderr.rstrip() or 'LDA delivery failed'
if status == self.EX_TEMPFAIL:
reply = Reply('450', error_msg)
raise TransientRelayError(error_msg, reply)
else:
reply = Reply('550', error_msg)
raise PermanentRelayError(error_msg, reply)
def test_enqueue_wait_partial_relay_expired(self):
env = Envelope('*****@*****.**', ['*****@*****.**',
'*****@*****.**',
'*****@*****.**'])
bounce_mock = self.mox.CreateMockAnything()
bounce_mock(IsA(Envelope), IsA(Reply)).AndReturn(None)
bounce_mock(IsA(Envelope), IsA(Reply)).AndReturn(None)
self.store.write(env, IsA(float)).AndReturn('1234')
self.relay._attempt(env, 0).AndReturn([TransientRelayError('transient', Reply('450', 'transient 1')),
TransientRelayError('transient', Reply('450', 'transient 1')),
TransientRelayError('transient', Reply('450', 'transient 2'))])
self.store.increment_attempts('1234')
self.store.remove('1234')
self.mox.ReplayAll()
queue = Queue(self.store, self.relay, bounce_factory=bounce_mock, relay_pool=5)
queue.enqueue(env)
queue.relay_pool.join()
def _try_pipe(self, envelope):
try:
status, stdout, stderr = self._exec_process(envelope)
except Timeout:
msg = 'Delivery timed out'
reply = Reply('450', msg)
raise TransientRelayError(msg, reply)
if status != 0:
self.raise_error(status, stdout, stderr)
def test_enqueue_wait_transientfail_noretry(self):
self.store.write(self.env, IsA(float)).AndReturn('1234')
self.relay._attempt(self.env, 0).AndRaise(TransientRelayError('transient', Reply('450', 'transient')))
self.store.increment_attempts('1234')
self.store.remove('1234')
self.mox.ReplayAll()
def no_bounce(envelope, reply):
return None
queue = Queue(self.store, self.relay, bounce_factory=no_bounce, relay_pool=5)
queue.enqueue(self.env)
queue.relay_pool.join()
def test_enqueue_wait_transientfail(self):
self.store.write(self.env, IsA(float)).AndReturn('1234')
self.relay._attempt(self.env, 0).AndRaise(TransientRelayError('transient', Reply('450', 'transient')))
self.store.increment_attempts('1234')
self.store.set_timestamp('1234', IsA(float))
self.mox.ReplayAll()
def backoff(envelope, attempts):
return 0
queue = Queue(self.store, self.relay, backoff=backoff, relay_pool=5)
queue.enqueue(self.env)
queue.relay_pool.join()
def raise_error(self, status, stdout, stderr):
error_msg = 'Delivery failed'
if stdout.startswith('maildrop: '):
error_msg = stdout[10:].rstrip()
elif stderr.startswith('maildrop: '):
error_msg = stderr[10:].rstrip()
if status == self.EX_TEMPFAIL:
reply = Reply('450', error_msg)
raise TransientRelayError(error_msg, reply)
else:
reply = Reply('550', error_msg)
raise PermanentRelayError(error_msg, reply)
def _try_pipe_one_rcpt(self, envelope):
header_data, message_data = envelope.flatten()
stdin = b''.join((header_data, message_data))
rcpt = envelope.recipients[0]
try:
with Timeout(self.timeout):
args = self._process_args(envelope, rcpt)
return self._exec_process(args, stdin)
except Timeout:
msg = 'Delivery timed out'
reply = Reply('450', '4.4.2 ' + msg)
raise TransientRelayError(msg, reply)
def _try_pipe_all_rcpts(self, envelope):
header_data, message_data = envelope.flatten()
stdin = b''.join((header_data, message_data))
results = {}
try:
with Timeout(self.timeout):
for rcpt in envelope.recipients:
args = self._process_args(envelope, rcpt)
results[rcpt] = self._exec_process(args, stdin)
except Timeout:
for rcpt in envelope.recipients:
if rcpt not in results:
msg = 'Delivery timed out'
reply = Reply('450', '4.4.2 ' + msg)
results[rcpt] = TransientRelayError(msg, reply)
return results
def test_attempt_delivery_transientrelayerror(self):
task = self.mox.CreateMockAnything()
subtask = self.mox.CreateMockAnything()
result = self.mox.CreateMockAnything()
result.id = '12345'
self.relay.attempt(self.env, 0).AndRaise(TransientRelayError('transient', Reply('450', 'transient error')))
self.celery.task(IgnoreArg()).AndReturn(task)
task.s(self.env, 1).AndReturn(subtask)
subtask.set(countdown=60)
subtask.apply_async().AndReturn(result)
self.mox.ReplayAll()
def backoff(envelope, attempts):
self.assertEqual(self.env, envelope)
self.assertEqual(1, attempts)
return 60
queue = CeleryQueue(self.celery, self.relay, backoff=backoff)
queue.attempt_delivery(self.env, 0)
def test_attempt_delivery_transientrelayerror_no_retry(self):
task = self.mox.CreateMockAnything()
subtask = self.mox.CreateMockAnything()
result = self.mox.CreateMockAnything()
result.id = '12345'
self.relay.attempt(self.env, 0).AndRaise(TransientRelayError('transient', Reply('450', 'transient error')))
self.celery.task(IgnoreArg()).AndReturn(task)
task.s(self.bounce, 0).AndReturn(subtask)
subtask.apply_async().AndReturn(result)
self.mox.ReplayAll()
def return_bounce(envelope, reply):
self.assertEqual(self.env, envelope)
return self.bounce
def no_retry(envelope, attempts):
self.assertEqual(self.env, envelope)
self.assertEqual(1, attempts)
return None
queue = CeleryQueue(self.celery, self.relay, backoff=no_retry, bounce_factory=return_bounce)
queue.attempt_delivery(self.env, 0)
def test_default_replies(self):
perm = PermanentRelayError('test msg')
transient = TransientRelayError('test msg')
self.assertEqual('550 5.0.0 test msg', str(perm.reply))
self.assertEqual('450 4.0.0 test msg', str(transient.reply))
