cpython/Lib/test/test_smtplib.py

486 lines
17 KiB
Python

import asyncore
import email.utils
import socket
import threading
import smtpd
import smtplib
import StringIO
import sys
import time
import select
from unittest import TestCase
from test import test_support
HOST = test_support.HOST
def server(evt, buf, serv):
serv.listen(5)
evt.set()
try:
conn, addr = serv.accept()
except socket.timeout:
pass
else:
n = 500
while buf and n > 0:
r, w, e = select.select([], [conn], [])
if w:
sent = conn.send(buf)
buf = buf[sent:]
n -= 1
conn.close()
finally:
serv.close()
evt.set()
class GeneralTests(TestCase):
def setUp(self):
self.evt = threading.Event()
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.sock.settimeout(15)
self.port = test_support.bind_port(self.sock)
servargs = (self.evt, "220 Hola mundo\n", self.sock)
threading.Thread(target=server, args=servargs).start()
self.evt.wait()
self.evt.clear()
def tearDown(self):
self.evt.wait()
def testBasic1(self):
# connects
smtp = smtplib.SMTP(HOST, self.port)
smtp.close()
def testBasic2(self):
# connects, include port in host name
smtp = smtplib.SMTP("%s:%s" % (HOST, self.port))
smtp.close()
def testLocalHostName(self):
# check that supplied local_hostname is used
smtp = smtplib.SMTP(HOST, self.port, local_hostname="testhost")
self.assertEqual(smtp.local_hostname, "testhost")
smtp.close()
def testTimeoutDefault(self):
self.assertTrue(socket.getdefaulttimeout() is None)
socket.setdefaulttimeout(30)
try:
smtp = smtplib.SMTP(HOST, self.port)
finally:
socket.setdefaulttimeout(None)
self.assertEqual(smtp.sock.gettimeout(), 30)
smtp.close()
def testTimeoutNone(self):
self.assertTrue(socket.getdefaulttimeout() is None)
socket.setdefaulttimeout(30)
try:
smtp = smtplib.SMTP(HOST, self.port, timeout=None)
finally:
socket.setdefaulttimeout(None)
self.assertTrue(smtp.sock.gettimeout() is None)
smtp.close()
def testTimeoutValue(self):
smtp = smtplib.SMTP(HOST, self.port, timeout=30)
self.assertEqual(smtp.sock.gettimeout(), 30)
smtp.close()
# Test server thread using the specified SMTP server class
def debugging_server(serv, serv_evt, client_evt):
serv_evt.set()
try:
if hasattr(select, 'poll'):
poll_fun = asyncore.poll2
else:
poll_fun = asyncore.poll
n = 1000
while asyncore.socket_map and n > 0:
poll_fun(0.01, asyncore.socket_map)
# when the client conversation is finished, it will
# set client_evt, and it's then ok to kill the server
if client_evt.is_set():
serv.close()
break
n -= 1
except socket.timeout:
pass
finally:
if not client_evt.is_set():
# allow some time for the client to read the result
time.sleep(0.5)
serv.close()
asyncore.close_all()
serv_evt.set()
MSG_BEGIN = '---------- MESSAGE FOLLOWS ----------\n'
MSG_END = '------------ END MESSAGE ------------\n'
# NOTE: Some SMTP objects in the tests below are created with a non-default
# local_hostname argument to the constructor, since (on some systems) the FQDN
# lookup caused by the default local_hostname sometimes takes so long that the
# test server times out, causing the test to fail.
# Test behavior of smtpd.DebuggingServer
class DebuggingServerTests(TestCase):
def setUp(self):
# temporarily replace sys.stdout to capture DebuggingServer output
self.old_stdout = sys.stdout
self.output = StringIO.StringIO()
sys.stdout = self.output
self.serv_evt = threading.Event()
self.client_evt = threading.Event()
self.port = test_support.find_unused_port()
self.serv = smtpd.DebuggingServer((HOST, self.port), ('nowhere', -1))
serv_args = (self.serv, self.serv_evt, self.client_evt)
threading.Thread(target=debugging_server, args=serv_args).start()
# wait until server thread has assigned a port number
self.serv_evt.wait()
self.serv_evt.clear()
def tearDown(self):
# indicate that the client is finished
self.client_evt.set()
# wait for the server thread to terminate
self.serv_evt.wait()
# restore sys.stdout
sys.stdout = self.old_stdout
def testBasic(self):
# connect
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
smtp.quit()
def testNOOP(self):
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
expected = (250, 'Ok')
self.assertEqual(smtp.noop(), expected)
smtp.quit()
def testRSET(self):
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
expected = (250, 'Ok')
self.assertEqual(smtp.rset(), expected)
smtp.quit()
def testNotImplemented(self):
# EHLO isn't implemented in DebuggingServer
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
expected = (502, 'Error: command "EHLO" not implemented')
self.assertEqual(smtp.ehlo(), expected)
smtp.quit()
def testVRFY(self):
# VRFY isn't implemented in DebuggingServer
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
expected = (502, 'Error: command "VRFY" not implemented')
self.assertEqual(smtp.vrfy('nobody@nowhere.com'), expected)
self.assertEqual(smtp.verify('nobody@nowhere.com'), expected)
smtp.quit()
def testSecondHELO(self):
# check that a second HELO returns a message that it's a duplicate
# (this behavior is specific to smtpd.SMTPChannel)
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
smtp.helo()
expected = (503, 'Duplicate HELO/EHLO')
self.assertEqual(smtp.helo(), expected)
smtp.quit()
def testHELP(self):
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
self.assertEqual(smtp.help(), 'Error: command "HELP" not implemented')
smtp.quit()
def testSend(self):
# connect and send mail
m = 'A test message'
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
smtp.sendmail('John', 'Sally', m)
# XXX(nnorwitz): this test is flaky and dies with a bad file descriptor
# in asyncore. This sleep might help, but should really be fixed
# properly by using an Event variable.
time.sleep(0.01)
smtp.quit()
self.client_evt.set()
self.serv_evt.wait()
self.output.flush()
mexpect = '%s%s\n%s' % (MSG_BEGIN, m, MSG_END)
self.assertEqual(self.output.getvalue(), mexpect)
class NonConnectingTests(TestCase):
def testNotConnected(self):
# Test various operations on an unconnected SMTP object that
# should raise exceptions (at present the attempt in SMTP.send
# to reference the nonexistent 'sock' attribute of the SMTP object
# causes an AttributeError)
smtp = smtplib.SMTP()
self.assertRaises(smtplib.SMTPServerDisconnected, smtp.ehlo)
self.assertRaises(smtplib.SMTPServerDisconnected,
smtp.send, 'test msg')
def testNonnumericPort(self):
# check that non-numeric port raises socket.error
self.assertRaises(socket.error, smtplib.SMTP,
"localhost", "bogus")
self.assertRaises(socket.error, smtplib.SMTP,
"localhost:bogus")
# test response of client to a non-successful HELO message
class BadHELOServerTests(TestCase):
def setUp(self):
self.old_stdout = sys.stdout
self.output = StringIO.StringIO()
sys.stdout = self.output
self.evt = threading.Event()
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.sock.settimeout(15)
self.port = test_support.bind_port(self.sock)
servargs = (self.evt, "199 no hello for you!\n", self.sock)
threading.Thread(target=server, args=servargs).start()
self.evt.wait()
self.evt.clear()
def tearDown(self):
self.evt.wait()
sys.stdout = self.old_stdout
def testFailingHELO(self):
self.assertRaises(smtplib.SMTPConnectError, smtplib.SMTP,
HOST, self.port, 'localhost', 3)
sim_users = {'Mr.A@somewhere.com':'John A',
'Ms.B@somewhere.com':'Sally B',
'Mrs.C@somewhereesle.com':'Ruth C',
}
sim_auth = ('Mr.A@somewhere.com', 'somepassword')
sim_cram_md5_challenge = ('PENCeUxFREJoU0NnbmhNWitOMjNGNn'
'dAZWx3b29kLmlubm9zb2Z0LmNvbT4=')
sim_auth_credentials = {
'login': 'TXIuQUBzb21ld2hlcmUuY29t',
'plain': 'AE1yLkFAc29tZXdoZXJlLmNvbQBzb21lcGFzc3dvcmQ=',
'cram-md5': ('TXIUQUBZB21LD2HLCMUUY29TIDG4OWQ0MJ'
'KWZGQ4ODNMNDA4NTGXMDRLZWMYZJDMODG1'),
}
sim_auth_login_password = 'C29TZXBHC3N3B3JK'
sim_lists = {'list-1':['Mr.A@somewhere.com','Mrs.C@somewhereesle.com'],
'list-2':['Ms.B@somewhere.com',],
}
# Simulated SMTP channel & server
class SimSMTPChannel(smtpd.SMTPChannel):
def __init__(self, *args, **kw):
self.__extrafeatures = []
smtpd.SMTPChannel.__init__(self, *args, **kw)
@property
def _extrafeatures(self):
return ''.join([ "250-{0}\r\n".format(x) for x in self.__extrafeatures ])
def add_feature(self, feature):
self.__extrafeatures.append(feature)
def smtp_EHLO(self, arg):
resp = ('250-testhost\r\n'
'250-EXPN\r\n'
'250-SIZE 20000000\r\n'
'250-STARTTLS\r\n'
'250-DELIVERBY\r\n')
resp = resp + self._extrafeatures + '250 HELP'
self.push(resp)
def smtp_VRFY(self, arg):
raw_addr = email.utils.parseaddr(arg)[1]
quoted_addr = smtplib.quoteaddr(arg)
if raw_addr in sim_users:
self.push('250 %s %s' % (sim_users[raw_addr], quoted_addr))
else:
self.push('550 No such user: %s' % arg)
def smtp_EXPN(self, arg):
list_name = email.utils.parseaddr(arg)[1].lower()
if list_name in sim_lists:
user_list = sim_lists[list_name]
for n, user_email in enumerate(user_list):
quoted_addr = smtplib.quoteaddr(user_email)
if n < len(user_list) - 1:
self.push('250-%s %s' % (sim_users[user_email], quoted_addr))
else:
self.push('250 %s %s' % (sim_users[user_email], quoted_addr))
else:
self.push('550 No access for you!')
def smtp_AUTH(self, arg):
if arg.strip().lower()=='cram-md5':
self.push('334 {0}'.format(sim_cram_md5_challenge))
return
mech, auth = arg.split()
mech = mech.lower()
if mech not in sim_auth_credentials:
self.push('504 auth type unimplemented')
return
if mech == 'plain' and auth==sim_auth_credentials['plain']:
self.push('235 plain auth ok')
elif mech=='login' and auth==sim_auth_credentials['login']:
self.push('334 Password:')
else:
self.push('550 No access for you!')
class SimSMTPServer(smtpd.SMTPServer):
def handle_accept(self):
conn, addr = self.accept()
self._SMTPchannel = SimSMTPChannel(self, conn, addr)
def process_message(self, peer, mailfrom, rcpttos, data):
pass
def add_feature(self, feature):
self._SMTPchannel.add_feature(feature)
# Test various SMTP & ESMTP commands/behaviors that require a simulated server
# (i.e., something with more features than DebuggingServer)
class SMTPSimTests(TestCase):
def setUp(self):
self.serv_evt = threading.Event()
self.client_evt = threading.Event()
self.port = test_support.find_unused_port()
self.serv = SimSMTPServer((HOST, self.port), ('nowhere', -1))
serv_args = (self.serv, self.serv_evt, self.client_evt)
threading.Thread(target=debugging_server, args=serv_args).start()
# wait until server thread has assigned a port number
self.serv_evt.wait()
self.serv_evt.clear()
def tearDown(self):
# indicate that the client is finished
self.client_evt.set()
# wait for the server thread to terminate
self.serv_evt.wait()
def testBasic(self):
# smoke test
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=15)
smtp.quit()
def testEHLO(self):
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=15)
# no features should be present before the EHLO
self.assertEqual(smtp.esmtp_features, {})
# features expected from the test server
expected_features = {'expn':'',
'size': '20000000',
'starttls': '',
'deliverby': '',
'help': '',
}
smtp.ehlo()
self.assertEqual(smtp.esmtp_features, expected_features)
for k in expected_features:
self.assertTrue(smtp.has_extn(k))
self.assertFalse(smtp.has_extn('unsupported-feature'))
smtp.quit()
def testVRFY(self):
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=15)
for email, name in sim_users.items():
expected_known = (250, '%s %s' % (name, smtplib.quoteaddr(email)))
self.assertEqual(smtp.vrfy(email), expected_known)
u = 'nobody@nowhere.com'
expected_unknown = (550, 'No such user: %s' % smtplib.quoteaddr(u))
self.assertEqual(smtp.vrfy(u), expected_unknown)
smtp.quit()
def testEXPN(self):
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=15)
for listname, members in sim_lists.items():
users = []
for m in members:
users.append('%s %s' % (sim_users[m], smtplib.quoteaddr(m)))
expected_known = (250, '\n'.join(users))
self.assertEqual(smtp.expn(listname), expected_known)
u = 'PSU-Members-List'
expected_unknown = (550, 'No access for you!')
self.assertEqual(smtp.expn(u), expected_unknown)
smtp.quit()
def testAUTH_PLAIN(self):
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=15)
self.serv.add_feature("AUTH PLAIN")
expected_auth_ok = (235, b'plain auth ok')
self.assertEqual(smtp.login(sim_auth[0], sim_auth[1]), expected_auth_ok)
# SimSMTPChannel doesn't fully support LOGIN or CRAM-MD5 auth because they
# require a synchronous read to obtain the credentials...so instead smtpd
# sees the credential sent by smtplib's login method as an unknown command,
# which results in smtplib raising an auth error. Fortunately the error
# message contains the encoded credential, so we can partially check that it
# was generated correctly (partially, because the 'word' is uppercased in
# the error message).
def testAUTH_LOGIN(self):
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=15)
self.serv.add_feature("AUTH LOGIN")
try: smtp.login(sim_auth[0], sim_auth[1])
except smtplib.SMTPAuthenticationError as err:
if sim_auth_login_password not in str(err):
raise "expected encoded password not found in error message"
def testAUTH_CRAM_MD5(self):
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=15)
self.serv.add_feature("AUTH CRAM-MD5")
try: smtp.login(sim_auth[0], sim_auth[1])
except smtplib.SMTPAuthenticationError as err:
if sim_auth_credentials['cram-md5'] not in str(err):
raise "expected encoded credentials not found in error message"
#TODO: add tests for correct AUTH method fallback now that the
#test infrastructure can support it.
def test_main(verbose=None):
test_support.run_unittest(GeneralTests, DebuggingServerTests,
NonConnectingTests,
BadHELOServerTests, SMTPSimTests)
if __name__ == '__main__':
test_main()