cpython/Lib/test/test_smtplib.py

895 lines
33 KiB
Python

import asyncore
import email.mime.text
import email.utils
import socket
import smtpd
import smtplib
import io
import re
import sys
import time
import select
import errno
import unittest
from test import support, mock_socket
try:
import threading
except ImportError:
threading = None
HOST = support.HOST
if sys.platform == 'darwin':
# select.poll returns a select.POLLHUP at the end of the tests
# on darwin, so just ignore it
def handle_expt(self):
pass
smtpd.SMTPChannel.handle_expt = handle_expt
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(unittest.TestCase):
def setUp(self):
smtplib.socket = mock_socket
self.port = 25
def tearDown(self):
smtplib.socket = socket
# This method is no longer used but is retained for backward compatibility,
# so test to make sure it still works.
def testQuoteData(self):
teststr = "abc\n.jkl\rfoo\r\n..blue"
expected = "abc\r\n..jkl\r\nfoo\r\n...blue"
self.assertEqual(expected, smtplib.quotedata(teststr))
def testBasic1(self):
mock_socket.reply_with(b"220 Hola mundo")
# connects
smtp = smtplib.SMTP(HOST, self.port)
smtp.close()
def testSourceAddress(self):
mock_socket.reply_with(b"220 Hola mundo")
# connects
smtp = smtplib.SMTP(HOST, self.port,
source_address=('127.0.0.1',19876))
self.assertEqual(smtp.source_address, ('127.0.0.1', 19876))
smtp.close()
def testBasic2(self):
mock_socket.reply_with(b"220 Hola mundo")
# connects, include port in host name
smtp = smtplib.SMTP("%s:%s" % (HOST, self.port))
smtp.close()
def testLocalHostName(self):
mock_socket.reply_with(b"220 Hola mundo")
# 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):
mock_socket.reply_with(b"220 Hola mundo")
self.assertIsNone(mock_socket.getdefaulttimeout())
mock_socket.setdefaulttimeout(30)
self.assertEqual(mock_socket.getdefaulttimeout(), 30)
try:
smtp = smtplib.SMTP(HOST, self.port)
finally:
mock_socket.setdefaulttimeout(None)
self.assertEqual(smtp.sock.gettimeout(), 30)
smtp.close()
def testTimeoutNone(self):
mock_socket.reply_with(b"220 Hola mundo")
self.assertIsNone(socket.getdefaulttimeout())
socket.setdefaulttimeout(30)
try:
smtp = smtplib.SMTP(HOST, self.port, timeout=None)
finally:
socket.setdefaulttimeout(None)
self.assertIsNone(smtp.sock.gettimeout())
smtp.close()
def testTimeoutValue(self):
mock_socket.reply_with(b"220 Hola mundo")
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
@unittest.skipUnless(threading, 'Threading required for this test.')
class DebuggingServerTests(unittest.TestCase):
maxDiff = None
def setUp(self):
self.real_getfqdn = socket.getfqdn
socket.getfqdn = mock_socket.getfqdn
# temporarily replace sys.stdout to capture DebuggingServer output
self.old_stdout = sys.stdout
self.output = io.StringIO()
sys.stdout = self.output
self.serv_evt = threading.Event()
self.client_evt = threading.Event()
# Capture SMTPChannel debug output
self.old_DEBUGSTREAM = smtpd.DEBUGSTREAM
smtpd.DEBUGSTREAM = io.StringIO()
# Pick a random unused port by passing 0 for the port number
self.serv = smtpd.DebuggingServer((HOST, 0), ('nowhere', -1))
# Keep a note of what port was assigned
self.port = self.serv.socket.getsockname()[1]
serv_args = (self.serv, self.serv_evt, self.client_evt)
self.thread = threading.Thread(target=debugging_server, args=serv_args)
self.thread.start()
# wait until server thread has assigned a port number
self.serv_evt.wait()
self.serv_evt.clear()
def tearDown(self):
socket.getfqdn = self.real_getfqdn
# indicate that the client is finished
self.client_evt.set()
# wait for the server thread to terminate
self.serv_evt.wait()
self.thread.join()
# restore sys.stdout
sys.stdout = self.old_stdout
# restore DEBUGSTREAM
smtpd.DEBUGSTREAM.close()
smtpd.DEBUGSTREAM = self.old_DEBUGSTREAM
def testBasic(self):
# connect
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
smtp.quit()
def testSourceAddress(self):
# connect
port = support.find_unused_port()
try:
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost',
timeout=3, source_address=('127.0.0.1', port))
self.assertEqual(smtp.source_address, ('127.0.0.1', port))
self.assertEqual(smtp.local_hostname, 'localhost')
smtp.quit()
except OSError as e:
if e.errno == errno.EADDRINUSE:
self.skipTest("couldn't bind to port %d" % port)
raise
def testNOOP(self):
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
expected = (250, b'OK')
self.assertEqual(smtp.noop(), expected)
smtp.quit()
def testRSET(self):
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
expected = (250, b'OK')
self.assertEqual(smtp.rset(), expected)
smtp.quit()
def testELHO(self):
# EHLO isn't implemented in DebuggingServer
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
expected = (250, b'\nSIZE 33554432\nHELP')
self.assertEqual(smtp.ehlo(), expected)
smtp.quit()
def testEXPNNotImplemented(self):
# EXPN isn't implemented in DebuggingServer
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
expected = (502, b'EXPN not implemented')
smtp.putcmd('EXPN')
self.assertEqual(smtp.getreply(), expected)
smtp.quit()
def testVRFY(self):
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
expected = (252, b'Cannot VRFY user, but will accept message ' + \
b'and attempt delivery')
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, b'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(), b'Supported commands: EHLO HELO MAIL ' + \
b'RCPT DATA RSET NOOP QUIT VRFY')
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)
def testSendBinary(self):
m = b'A test message'
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
smtp.sendmail('John', 'Sally', m)
# XXX (see comment in testSend)
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.decode('ascii'), MSG_END)
self.assertEqual(self.output.getvalue(), mexpect)
def testSendNeedingDotQuote(self):
# Issue 12283
m = '.A test\n.mes.sage.'
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
smtp.sendmail('John', 'Sally', m)
# XXX (see comment in testSend)
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)
def testSendNullSender(self):
m = 'A test message'
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
smtp.sendmail('<>', 'Sally', m)
# XXX (see comment in testSend)
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)
debugout = smtpd.DEBUGSTREAM.getvalue()
sender = re.compile("^sender: <>$", re.MULTILINE)
self.assertRegex(debugout, sender)
def testSendMessage(self):
m = email.mime.text.MIMEText('A test message')
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
smtp.send_message(m, from_addr='John', to_addrs='Sally')
# XXX (see comment in testSend)
time.sleep(0.01)
smtp.quit()
self.client_evt.set()
self.serv_evt.wait()
self.output.flush()
# Add the X-Peer header that DebuggingServer adds
m['X-Peer'] = socket.gethostbyname('localhost')
mexpect = '%s%s\n%s' % (MSG_BEGIN, m.as_string(), MSG_END)
self.assertEqual(self.output.getvalue(), mexpect)
def testSendMessageWithAddresses(self):
m = email.mime.text.MIMEText('A test message')
m['From'] = 'foo@bar.com'
m['To'] = 'John'
m['CC'] = 'Sally, Fred'
m['Bcc'] = 'John Root <root@localhost>, "Dinsdale" <warped@silly.walks.com>'
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
smtp.send_message(m)
# XXX (see comment in testSend)
time.sleep(0.01)
smtp.quit()
# make sure the Bcc header is still in the message.
self.assertEqual(m['Bcc'], 'John Root <root@localhost>, "Dinsdale" '
'<warped@silly.walks.com>')
self.client_evt.set()
self.serv_evt.wait()
self.output.flush()
# Add the X-Peer header that DebuggingServer adds
m['X-Peer'] = socket.gethostbyname('localhost')
# The Bcc header should not be transmitted.
del m['Bcc']
mexpect = '%s%s\n%s' % (MSG_BEGIN, m.as_string(), MSG_END)
self.assertEqual(self.output.getvalue(), mexpect)
debugout = smtpd.DEBUGSTREAM.getvalue()
sender = re.compile("^sender: foo@bar.com$", re.MULTILINE)
self.assertRegex(debugout, sender)
for addr in ('John', 'Sally', 'Fred', 'root@localhost',
'warped@silly.walks.com'):
to_addr = re.compile(r"^recips: .*'{}'.*$".format(addr),
re.MULTILINE)
self.assertRegex(debugout, to_addr)
def testSendMessageWithSomeAddresses(self):
# Make sure nothing breaks if not all of the three 'to' headers exist
m = email.mime.text.MIMEText('A test message')
m['From'] = 'foo@bar.com'
m['To'] = 'John, Dinsdale'
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
smtp.send_message(m)
# XXX (see comment in testSend)
time.sleep(0.01)
smtp.quit()
self.client_evt.set()
self.serv_evt.wait()
self.output.flush()
# Add the X-Peer header that DebuggingServer adds
m['X-Peer'] = socket.gethostbyname('localhost')
mexpect = '%s%s\n%s' % (MSG_BEGIN, m.as_string(), MSG_END)
self.assertEqual(self.output.getvalue(), mexpect)
debugout = smtpd.DEBUGSTREAM.getvalue()
sender = re.compile("^sender: foo@bar.com$", re.MULTILINE)
self.assertRegex(debugout, sender)
for addr in ('John', 'Dinsdale'):
to_addr = re.compile(r"^recips: .*'{}'.*$".format(addr),
re.MULTILINE)
self.assertRegex(debugout, to_addr)
def testSendMessageWithSpecifiedAddresses(self):
# Make sure addresses specified in call override those in message.
m = email.mime.text.MIMEText('A test message')
m['From'] = 'foo@bar.com'
m['To'] = 'John, Dinsdale'
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
smtp.send_message(m, from_addr='joe@example.com', to_addrs='foo@example.net')
# XXX (see comment in testSend)
time.sleep(0.01)
smtp.quit()
self.client_evt.set()
self.serv_evt.wait()
self.output.flush()
# Add the X-Peer header that DebuggingServer adds
m['X-Peer'] = socket.gethostbyname('localhost')
mexpect = '%s%s\n%s' % (MSG_BEGIN, m.as_string(), MSG_END)
self.assertEqual(self.output.getvalue(), mexpect)
debugout = smtpd.DEBUGSTREAM.getvalue()
sender = re.compile("^sender: joe@example.com$", re.MULTILINE)
self.assertRegex(debugout, sender)
for addr in ('John', 'Dinsdale'):
to_addr = re.compile(r"^recips: .*'{}'.*$".format(addr),
re.MULTILINE)
self.assertNotRegex(debugout, to_addr)
recip = re.compile(r"^recips: .*'foo@example.net'.*$", re.MULTILINE)
self.assertRegex(debugout, recip)
def testSendMessageWithMultipleFrom(self):
# Sender overrides To
m = email.mime.text.MIMEText('A test message')
m['From'] = 'Bernard, Bianca'
m['Sender'] = 'the_rescuers@Rescue-Aid-Society.com'
m['To'] = 'John, Dinsdale'
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
smtp.send_message(m)
# XXX (see comment in testSend)
time.sleep(0.01)
smtp.quit()
self.client_evt.set()
self.serv_evt.wait()
self.output.flush()
# Add the X-Peer header that DebuggingServer adds
m['X-Peer'] = socket.gethostbyname('localhost')
mexpect = '%s%s\n%s' % (MSG_BEGIN, m.as_string(), MSG_END)
self.assertEqual(self.output.getvalue(), mexpect)
debugout = smtpd.DEBUGSTREAM.getvalue()
sender = re.compile("^sender: the_rescuers@Rescue-Aid-Society.com$", re.MULTILINE)
self.assertRegex(debugout, sender)
for addr in ('John', 'Dinsdale'):
to_addr = re.compile(r"^recips: .*'{}'.*$".format(addr),
re.MULTILINE)
self.assertRegex(debugout, to_addr)
def testSendMessageResent(self):
m = email.mime.text.MIMEText('A test message')
m['From'] = 'foo@bar.com'
m['To'] = 'John'
m['CC'] = 'Sally, Fred'
m['Bcc'] = 'John Root <root@localhost>, "Dinsdale" <warped@silly.walks.com>'
m['Resent-Date'] = 'Thu, 1 Jan 1970 17:42:00 +0000'
m['Resent-From'] = 'holy@grail.net'
m['Resent-To'] = 'Martha <my_mom@great.cooker.com>, Jeff'
m['Resent-Bcc'] = 'doe@losthope.net'
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
smtp.send_message(m)
# XXX (see comment in testSend)
time.sleep(0.01)
smtp.quit()
self.client_evt.set()
self.serv_evt.wait()
self.output.flush()
# The Resent-Bcc headers are deleted before serialization.
del m['Bcc']
del m['Resent-Bcc']
# Add the X-Peer header that DebuggingServer adds
m['X-Peer'] = socket.gethostbyname('localhost')
mexpect = '%s%s\n%s' % (MSG_BEGIN, m.as_string(), MSG_END)
self.assertEqual(self.output.getvalue(), mexpect)
debugout = smtpd.DEBUGSTREAM.getvalue()
sender = re.compile("^sender: holy@grail.net$", re.MULTILINE)
self.assertRegex(debugout, sender)
for addr in ('my_mom@great.cooker.com', 'Jeff', 'doe@losthope.net'):
to_addr = re.compile(r"^recips: .*'{}'.*$".format(addr),
re.MULTILINE)
self.assertRegex(debugout, to_addr)
def testSendMessageMultipleResentRaises(self):
m = email.mime.text.MIMEText('A test message')
m['From'] = 'foo@bar.com'
m['To'] = 'John'
m['CC'] = 'Sally, Fred'
m['Bcc'] = 'John Root <root@localhost>, "Dinsdale" <warped@silly.walks.com>'
m['Resent-Date'] = 'Thu, 1 Jan 1970 17:42:00 +0000'
m['Resent-From'] = 'holy@grail.net'
m['Resent-To'] = 'Martha <my_mom@great.cooker.com>, Jeff'
m['Resent-Bcc'] = 'doe@losthope.net'
m['Resent-Date'] = 'Thu, 2 Jan 1970 17:42:00 +0000'
m['Resent-To'] = 'holy@grail.net'
m['Resent-From'] = 'Martha <my_mom@great.cooker.com>, Jeff'
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=3)
with self.assertRaises(ValueError):
smtp.send_message(m)
smtp.close()
class NonConnectingTests(unittest.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 OSError
self.assertRaises(OSError, smtplib.SMTP,
"localhost", "bogus")
self.assertRaises(OSError, smtplib.SMTP,
"localhost:bogus")
# test response of client to a non-successful HELO message
@unittest.skipUnless(threading, 'Threading required for this test.')
class BadHELOServerTests(unittest.TestCase):
def setUp(self):
smtplib.socket = mock_socket
mock_socket.reply_with(b"199 no hello for you!")
self.old_stdout = sys.stdout
self.output = io.StringIO()
sys.stdout = self.output
self.port = 25
def tearDown(self):
smtplib.socket = socket
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@xn--fo-fka.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@xn--fo-fka.com',],
}
# Simulated SMTP channel & server
class SimSMTPChannel(smtpd.SMTPChannel):
quit_response = None
mail_response = None
rcpt_response = None
data_response = None
rcpt_count = 0
rset_count = 0
def __init__(self, extra_features, *args, **kw):
self._extrafeatures = ''.join(
[ "250-{0}\r\n".format(x) for x in extra_features ])
super(SimSMTPChannel, self).__init__(*args, **kw)
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)
self.seen_greeting = arg
self.extended_smtp = True
def smtp_VRFY(self, arg):
# For max compatibility smtplib should be sending the raw address.
if arg in sim_users:
self.push('250 %s %s' % (sim_users[arg], smtplib.quoteaddr(arg)))
else:
self.push('550 No such user: %s' % arg)
def smtp_EXPN(self, arg):
list_name = arg.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 {}'.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!')
def smtp_QUIT(self, arg):
if self.quit_response is None:
super(SimSMTPChannel, self).smtp_QUIT(arg)
else:
self.push(self.quit_response)
self.close_when_done()
def smtp_MAIL(self, arg):
if self.mail_response is None:
super().smtp_MAIL(arg)
else:
self.push(self.mail_response)
def smtp_RCPT(self, arg):
if self.rcpt_response is None:
super().smtp_RCPT(arg)
return
self.rcpt_count += 1
self.push(self.rcpt_response[self.rcpt_count-1])
def smtp_RSET(self, arg):
self.rset_count += 1
super().smtp_RSET(arg)
def smtp_DATA(self, arg):
if self.data_response is None:
super().smtp_DATA(arg)
else:
self.push(self.data_response)
def handle_error(self):
raise
class SimSMTPServer(smtpd.SMTPServer):
channel_class = SimSMTPChannel
def __init__(self, *args, **kw):
self._extra_features = []
smtpd.SMTPServer.__init__(self, *args, **kw)
def handle_accepted(self, conn, addr):
self._SMTPchannel = self.channel_class(
self._extra_features, self, conn, addr)
def process_message(self, peer, mailfrom, rcpttos, data):
pass
def add_feature(self, feature):
self._extra_features.append(feature)
def handle_error(self):
raise
# Test various SMTP & ESMTP commands/behaviors that require a simulated server
# (i.e., something with more features than DebuggingServer)
@unittest.skipUnless(threading, 'Threading required for this test.')
class SMTPSimTests(unittest.TestCase):
def setUp(self):
self.real_getfqdn = socket.getfqdn
socket.getfqdn = mock_socket.getfqdn
self.serv_evt = threading.Event()
self.client_evt = threading.Event()
# Pick a random unused port by passing 0 for the port number
self.serv = SimSMTPServer((HOST, 0), ('nowhere', -1))
# Keep a note of what port was assigned
self.port = self.serv.socket.getsockname()[1]
serv_args = (self.serv, self.serv_evt, self.client_evt)
self.thread = threading.Thread(target=debugging_server, args=serv_args)
self.thread.start()
# wait until server thread has assigned a port number
self.serv_evt.wait()
self.serv_evt.clear()
def tearDown(self):
socket.getfqdn = self.real_getfqdn
# indicate that the client is finished
self.client_evt.set()
# wait for the server thread to terminate
self.serv_evt.wait()
self.thread.join()
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, bytes('%s %s' %
(name, smtplib.quoteaddr(email)),
"ascii"))
self.assertEqual(smtp.vrfy(email), expected_known)
u = 'nobody@nowhere.com'
expected_unknown = (550, ('No such user: %s' % u).encode('ascii'))
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, bytes('\n'.join(users), "ascii"))
self.assertEqual(smtp.expn(listname), expected_known)
u = 'PSU-Members-List'
expected_unknown = (550, b'No access for you!')
self.assertEqual(smtp.expn(u), expected_unknown)
smtp.quit()
def testAUTH_PLAIN(self):
self.serv.add_feature("AUTH PLAIN")
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=15)
expected_auth_ok = (235, b'plain auth ok')
self.assertEqual(smtp.login(sim_auth[0], sim_auth[1]), expected_auth_ok)
smtp.close()
# 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):
self.serv.add_feature("AUTH LOGIN")
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=15)
try: smtp.login(sim_auth[0], sim_auth[1])
except smtplib.SMTPAuthenticationError as err:
self.assertIn(sim_auth_login_password, str(err))
smtp.close()
def testAUTH_CRAM_MD5(self):
self.serv.add_feature("AUTH CRAM-MD5")
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=15)
try: smtp.login(sim_auth[0], sim_auth[1])
except smtplib.SMTPAuthenticationError as err:
self.assertIn(sim_auth_credentials['cram-md5'], str(err))
smtp.close()
def testAUTH_multiple(self):
# Test that multiple authentication methods are tried.
self.serv.add_feature("AUTH BOGUS PLAIN LOGIN CRAM-MD5")
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=15)
try: smtp.login(sim_auth[0], sim_auth[1])
except smtplib.SMTPAuthenticationError as err:
self.assertIn(sim_auth_login_password, str(err))
smtp.close()
def test_with_statement(self):
with smtplib.SMTP(HOST, self.port) as smtp:
code, message = smtp.noop()
self.assertEqual(code, 250)
self.assertRaises(smtplib.SMTPServerDisconnected, smtp.send, b'foo')
with smtplib.SMTP(HOST, self.port) as smtp:
smtp.close()
self.assertRaises(smtplib.SMTPServerDisconnected, smtp.send, b'foo')
def test_with_statement_QUIT_failure(self):
with self.assertRaises(smtplib.SMTPResponseException) as error:
with smtplib.SMTP(HOST, self.port) as smtp:
smtp.noop()
self.serv._SMTPchannel.quit_response = '421 QUIT FAILED'
self.assertEqual(error.exception.smtp_code, 421)
self.assertEqual(error.exception.smtp_error, b'QUIT FAILED')
#TODO: add tests for correct AUTH method fallback now that the
#test infrastructure can support it.
# Issue 5713: make sure close, not rset, is called if we get a 421 error
def test_421_from_mail_cmd(self):
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=15)
smtp.noop()
self.serv._SMTPchannel.mail_response = '421 closing connection'
with self.assertRaises(smtplib.SMTPSenderRefused):
smtp.sendmail('John', 'Sally', 'test message')
self.assertIsNone(smtp.sock)
self.assertEqual(self.serv._SMTPchannel.rset_count, 0)
def test_421_from_rcpt_cmd(self):
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=15)
smtp.noop()
self.serv._SMTPchannel.rcpt_response = ['250 accepted', '421 closing']
with self.assertRaises(smtplib.SMTPRecipientsRefused) as r:
smtp.sendmail('John', ['Sally', 'Frank', 'George'], 'test message')
self.assertIsNone(smtp.sock)
self.assertEqual(self.serv._SMTPchannel.rset_count, 0)
self.assertDictEqual(r.exception.args[0], {'Frank': (421, b'closing')})
def test_421_from_data_cmd(self):
class MySimSMTPChannel(SimSMTPChannel):
def found_terminator(self):
if self.smtp_state == self.DATA:
self.push('421 closing')
else:
super().found_terminator()
self.serv.channel_class = MySimSMTPChannel
smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost', timeout=15)
smtp.noop()
with self.assertRaises(smtplib.SMTPDataError):
smtp.sendmail('John@foo.org', ['Sally@foo.org'], 'test message')
self.assertIsNone(smtp.sock)
self.assertEqual(self.serv._SMTPchannel.rcpt_count, 0)
@support.reap_threads
def test_main(verbose=None):
support.run_unittest(GeneralTests, DebuggingServerTests,
NonConnectingTests,
BadHELOServerTests, SMTPSimTests)
if __name__ == '__main__':
test_main()