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