summaryrefslogtreecommitdiffstats
path: root/Lib/test/test_poplib.py
blob: e5b16dc98a41113d47e81c7ede3797cea5eb1f19 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
"""Test script for poplib module."""

# Modified by Giampaolo Rodola' to give poplib.POP3 and poplib.POP3_SSL
# a real test suite

import poplib
import asyncore
import asynchat
import socket
import os
import errno

from unittest import TestCase, skipUnless
from test import support as test_support
threading = test_support.import_module('threading')

HOST = test_support.HOST
PORT = 0

SUPPORTS_SSL = False
if hasattr(poplib, 'POP3_SSL'):
    import ssl

    SUPPORTS_SSL = True
    CERTFILE = os.path.join(os.path.dirname(__file__) or os.curdir, "keycert3.pem")
    CAFILE = os.path.join(os.path.dirname(__file__) or os.curdir, "pycacert.pem")

requires_ssl = skipUnless(SUPPORTS_SSL, 'SSL not supported')

# the dummy data returned by server when LIST and RETR commands are issued
LIST_RESP = b'1 1\r\n2 2\r\n3 3\r\n4 4\r\n5 5\r\n.\r\n'
RETR_RESP = b"""From: postmaster@python.org\
\r\nContent-Type: text/plain\r\n\
MIME-Version: 1.0\r\n\
Subject: Dummy\r\n\
\r\n\
line1\r\n\
line2\r\n\
line3\r\n\
.\r\n"""


class DummyPOP3Handler(asynchat.async_chat):

    CAPAS = {'UIDL': [], 'IMPLEMENTATION': ['python-testlib-pop-server']}
    enable_UTF8 = False

    def __init__(self, conn):
        asynchat.async_chat.__init__(self, conn)
        self.set_terminator(b"\r\n")
        self.in_buffer = []
        self.push('+OK dummy pop3 server ready. <timestamp>')
        self.tls_active = False
        self.tls_starting = False

    def collect_incoming_data(self, data):
        self.in_buffer.append(data)

    def found_terminator(self):
        line = b''.join(self.in_buffer)
        line = str(line, 'ISO-8859-1')
        self.in_buffer = []
        cmd = line.split(' ')[0].lower()
        space = line.find(' ')
        if space != -1:
            arg = line[space + 1:]
        else:
            arg = ""
        if hasattr(self, 'cmd_' + cmd):
            method = getattr(self, 'cmd_' + cmd)
            method(arg)
        else:
            self.push('-ERR unrecognized POP3 command "%s".' %cmd)

    def handle_error(self):
        raise

    def push(self, data):
        asynchat.async_chat.push(self, data.encode("ISO-8859-1") + b'\r\n')

    def cmd_echo(self, arg):
        # sends back the received string (used by the test suite)
        self.push(arg)

    def cmd_user(self, arg):
        if arg != "guido":
            self.push("-ERR no such user")
        self.push('+OK password required')

    def cmd_pass(self, arg):
        if arg != "python":
            self.push("-ERR wrong password")
        self.push('+OK 10 messages')

    def cmd_stat(self, arg):
        self.push('+OK 10 100')

    def cmd_list(self, arg):
        if arg:
            self.push('+OK %s %s' % (arg, arg))
        else:
            self.push('+OK')
            asynchat.async_chat.push(self, LIST_RESP)

    cmd_uidl = cmd_list

    def cmd_retr(self, arg):
        self.push('+OK %s bytes' %len(RETR_RESP))
        asynchat.async_chat.push(self, RETR_RESP)

    cmd_top = cmd_retr

    def cmd_dele(self, arg):
        self.push('+OK message marked for deletion.')

    def cmd_noop(self, arg):
        self.push('+OK done nothing.')

    def cmd_rpop(self, arg):
        self.push('+OK done nothing.')

    def cmd_apop(self, arg):
        self.push('+OK done nothing.')

    def cmd_quit(self, arg):
        self.push('+OK closing.')
        self.close_when_done()

    def _get_capas(self):
        _capas = dict(self.CAPAS)
        if not self.tls_active and SUPPORTS_SSL:
            _capas['STLS'] = []
        return _capas

    def cmd_capa(self, arg):
        self.push('+OK Capability list follows')
        if self._get_capas():
            for cap, params in self._get_capas().items():
                _ln = [cap]
                if params:
                    _ln.extend(params)
                self.push(' '.join(_ln))
        self.push('.')

    def cmd_utf8(self, arg):
        self.push('+OK I know RFC6856'
                  if self.enable_UTF8
                  else '-ERR What is UTF8?!')

    if SUPPORTS_SSL:

        def cmd_stls(self, arg):
            if self.tls_active is False:
                self.push('+OK Begin TLS negotiation')
                context = ssl.SSLContext()
                context.load_cert_chain(CERTFILE)
                tls_sock = context.wrap_socket(self.socket,
                                               server_side=True,
                                               do_handshake_on_connect=False,
                                               suppress_ragged_eofs=False)
                self.del_channel()
                self.set_socket(tls_sock)
                self.tls_active = True
                self.tls_starting = True
                self.in_buffer = []
                self._do_tls_handshake()
            else:
                self.push('-ERR Command not permitted when TLS active')

        def _do_tls_handshake(self):
            try:
                self.socket.do_handshake()
            except ssl.SSLError as err:
                if err.args[0] in (ssl.SSL_ERROR_WANT_READ,
                                   ssl.SSL_ERROR_WANT_WRITE):
                    return
                elif err.args[0] == ssl.SSL_ERROR_EOF:
                    return self.handle_close()
                raise
            except OSError as err:
                if err.args[0] == errno.ECONNABORTED:
                    return self.handle_close()
            else:
                self.tls_active = True
                self.tls_starting = False

        def handle_read(self):
            if self.tls_starting:
                self._do_tls_handshake()
            else:
                try:
                    asynchat.async_chat.handle_read(self)
                except ssl.SSLEOFError:
                    self.handle_close()

class DummyPOP3Server(asyncore.dispatcher, threading.Thread):

    handler = DummyPOP3Handler

    def __init__(self, address, af=socket.AF_INET):
        threading.Thread.__init__(self)
        asyncore.dispatcher.__init__(self)
        self.create_socket(af, socket.SOCK_STREAM)
        self.bind(address)
        self.listen(5)
        self.active = False
        self.active_lock = threading.Lock()
        self.host, self.port = self.socket.getsockname()[:2]
        self.handler_instance = None

    def start(self):
        assert not self.active
        self.__flag = threading.Event()
        threading.Thread.start(self)
        self.__flag.wait()

    def run(self):
        self.active = True
        self.__flag.set()
        while self.active and asyncore.socket_map:
            self.active_lock.acquire()
            asyncore.loop(timeout=0.1, count=1)
            self.active_lock.release()
        asyncore.close_all(ignore_all=True)

    def stop(self):
        assert self.active
        self.active = False
        self.join()

    def handle_accepted(self, conn, addr):
        self.handler_instance = self.handler(conn)

    def handle_connect(self):
        self.close()
    handle_read = handle_connect

    def writable(self):
        return 0

    def handle_error(self):
        raise


class TestPOP3Class(TestCase):
    def assertOK(self, resp):
        self.assertTrue(resp.startswith(b"+OK"))

    def setUp(self):
        self.server = DummyPOP3Server((HOST, PORT))
        self.server.start()
        self.client = poplib.POP3(self.server.host, self.server.port, timeout=3)

    def tearDown(self):
        self.client.close()
        self.server.stop()

    def test_getwelcome(self):
        self.assertEqual(self.client.getwelcome(),
                         b'+OK dummy pop3 server ready. <timestamp>')

    def test_exceptions(self):
        self.assertRaises(poplib.error_proto, self.client._shortcmd, 'echo -err')

    def test_user(self):
        self.assertOK(self.client.user('guido'))
        self.assertRaises(poplib.error_proto, self.client.user, 'invalid')

    def test_pass_(self):
        self.assertOK(self.client.pass_('python'))
        self.assertRaises(poplib.error_proto, self.client.user, 'invalid')

    def test_stat(self):
        self.assertEqual(self.client.stat(), (10, 100))

    def test_list(self):
        self.assertEqual(self.client.list()[1:],
                         ([b'1 1', b'2 2', b'3 3', b'4 4', b'5 5'],
                          25))
        self.assertTrue(self.client.list('1').endswith(b"OK 1 1"))

    def test_retr(self):
        expected = (b'+OK 116 bytes',
                    [b'From: postmaster@python.org', b'Content-Type: text/plain',
                     b'MIME-Version: 1.0', b'Subject: Dummy',
                     b'', b'line1', b'line2', b'line3'],
                    113)
        foo = self.client.retr('foo')
        self.assertEqual(foo, expected)

    def test_too_long_lines(self):
        self.assertRaises(poplib.error_proto, self.client._shortcmd,
                          'echo +%s' % ((poplib._MAXLINE + 10) * 'a'))

    def test_dele(self):
        self.assertOK(self.client.dele('foo'))

    def test_noop(self):
        self.assertOK(self.client.noop())

    def test_rpop(self):
        self.assertOK(self.client.rpop('foo'))

    def test_apop(self):
        self.assertOK(self.client.apop('foo', 'dummypassword'))

    def test_top(self):
        expected =  (b'+OK 116 bytes',
                     [b'From: postmaster@python.org', b'Content-Type: text/plain',
                      b'MIME-Version: 1.0', b'Subject: Dummy', b'',
                      b'line1', b'line2', b'line3'],
                     113)
        self.assertEqual(self.client.top(1, 1), expected)

    def test_uidl(self):
        self.client.uidl()
        self.client.uidl('foo')

    def test_utf8_raises_if_unsupported(self):
        self.server.handler.enable_UTF8 = False
        self.assertRaises(poplib.error_proto, self.client.utf8)

    def test_utf8(self):
        self.server.handler.enable_UTF8 = True
        expected = b'+OK I know RFC6856'
        result = self.client.utf8()
        self.assertEqual(result, expected)

    def test_capa(self):
        capa = self.client.capa()
        self.assertTrue('IMPLEMENTATION' in capa.keys())

    def test_quit(self):
        resp = self.client.quit()
        self.assertTrue(resp)
        self.assertIsNone(self.client.sock)
        self.assertIsNone(self.client.file)

    @requires_ssl
    def test_stls_capa(self):
        capa = self.client.capa()
        self.assertTrue('STLS' in capa.keys())

    @requires_ssl
    def test_stls(self):
        expected = b'+OK Begin TLS negotiation'
        resp = self.client.stls()
        self.assertEqual(resp, expected)

    @requires_ssl
    def test_stls_context(self):
        expected = b'+OK Begin TLS negotiation'
        ctx = ssl.SSLContext(ssl.PROTOCOL_TLSv1)
        ctx.load_verify_locations(CAFILE)
        ctx.verify_mode = ssl.CERT_REQUIRED
        ctx.check_hostname = True
        with self.assertRaises(ssl.CertificateError):
            resp = self.client.stls(context=ctx)
        self.client = poplib.POP3("localhost", self.server.port, timeout=3)
        resp = self.client.stls(context=ctx)
        self.assertEqual(resp, expected)


if SUPPORTS_SSL:
    from test.test_ftplib import SSLConnection

    class DummyPOP3_SSLHandler(SSLConnection, DummyPOP3Handler):

        def __init__(self, conn):
            asynchat.async_chat.__init__(self, conn)
            self.secure_connection()
            self.set_terminator(b"\r\n")
            self.in_buffer = []
            self.push('+OK dummy pop3 server ready. <timestamp>')
            self.tls_active = True
            self.tls_starting = False


@requires_ssl
class TestPOP3_SSLClass(TestPOP3Class):
    # repeat previous tests by using poplib.POP3_SSL

    def setUp(self):
        self.server = DummyPOP3Server((HOST, PORT))
        self.server.handler = DummyPOP3_SSLHandler
        self.server.start()
        self.client = poplib.POP3_SSL(self.server.host, self.server.port)

    def test__all__(self):
        self.assertIn('POP3_SSL', poplib.__all__)

    def test_context(self):
        ctx = ssl.SSLContext(ssl.PROTOCOL_TLSv1)
        self.assertRaises(ValueError, poplib.POP3_SSL, self.server.host,
                            self.server.port, keyfile=CERTFILE, context=ctx)
        self.assertRaises(ValueError, poplib.POP3_SSL, self.server.host,
                            self.server.port, certfile=CERTFILE, context=ctx)
        self.assertRaises(ValueError, poplib.POP3_SSL, self.server.host,
                            self.server.port, keyfile=CERTFILE,
                            certfile=CERTFILE, context=ctx)

        self.client.quit()
        self.client = poplib.POP3_SSL(self.server.host, self.server.port,
                                        context=ctx)
        self.assertIsInstance(self.client.sock, ssl.SSLSocket)
        self.assertIs(self.client.sock.context, ctx)
        self.assertTrue(self.client.noop().startswith(b'+OK'))

    def test_stls(self):
        self.assertRaises(poplib.error_proto, self.client.stls)

    test_stls_context = test_stls

    def test_stls_capa(self):
        capa = self.client.capa()
        self.assertFalse('STLS' in capa.keys())


@requires_ssl
class TestPOP3_TLSClass(TestPOP3Class):
    # repeat previous tests by using poplib.POP3.stls()

    def setUp(self):
        self.server = DummyPOP3Server((HOST, PORT))
        self.server.start()
        self.client = poplib.POP3(self.server.host, self.server.port, timeout=3)
        self.client.stls()

    def tearDown(self):
        if self.client.file is not None and self.client.sock is not None:
            try:
                self.client.quit()
            except poplib.error_proto:
                # happens in the test_too_long_lines case; the overlong
                # response will be treated as response to QUIT and raise
                # this exception
                self.client.close()
        self.server.stop()

    def test_stls(self):
        self.assertRaises(poplib.error_proto, self.client.stls)

    test_stls_context = test_stls

    def test_stls_capa(self):
        capa = self.client.capa()
        self.assertFalse(b'STLS' in capa.keys())


class TestTimeouts(TestCase):

    def setUp(self):
        self.evt = threading.Event()
        self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.sock.settimeout(60)  # Safety net. Look issue 11812
        self.port = test_support.bind_port(self.sock)
        self.thread = threading.Thread(target=self.server, args=(self.evt,self.sock))
        self.thread.setDaemon(True)
        self.thread.start()
        self.evt.wait()

    def tearDown(self):
        self.thread.join()
        del self.thread  # Clear out any dangling Thread objects.

    def server(self, evt, serv):
        serv.listen()
        evt.set()
        try:
            conn, addr = serv.accept()
            conn.send(b"+ Hola mundo\n")
            conn.close()
        except socket.timeout:
            pass
        finally:
            serv.close()

    def testTimeoutDefault(self):
        self.assertIsNone(socket.getdefaulttimeout())
        socket.setdefaulttimeout(30)
        try:
            pop = poplib.POP3(HOST, self.port)
        finally:
            socket.setdefaulttimeout(None)
        self.assertEqual(pop.sock.gettimeout(), 30)
        pop.sock.close()

    def testTimeoutNone(self):
        self.assertIsNone(socket.getdefaulttimeout())
        socket.setdefaulttimeout(30)
        try:
            pop = poplib.POP3(HOST, self.port, timeout=None)
        finally:
            socket.setdefaulttimeout(None)
        self.assertIsNone(pop.sock.gettimeout())
        pop.sock.close()

    def testTimeoutValue(self):
        pop = poplib.POP3(HOST, self.port, timeout=30)
        self.assertEqual(pop.sock.gettimeout(), 30)
        pop.sock.close()


def test_main():
    tests = [TestPOP3Class, TestTimeouts,
             TestPOP3_SSLClass, TestPOP3_TLSClass]
    thread_info = test_support.threading_setup()
    try:
        test_support.run_unittest(*tests)
    finally:
        test_support.threading_cleanup(*thread_info)


if __name__ == '__main__':
    test_main()