summaryrefslogtreecommitdiffstats
path: root/Lib/test/test_ftplib.py
blob: 7028f465199410b4f068e514405ad40dfeb7a589 (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
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
"""Test script for ftplib module."""

# Modified by Giampaolo Rodola' to test FTP class, IPv6 and TLS
# environment

import ftplib
import asyncore
import asynchat
import socket
import io
import errno
import os
import time
try:
    import ssl
except ImportError:
    ssl = None

from unittest import TestCase
from test import support
from test.support import HOST
threading = support.import_module('threading')

# the dummy data returned by server over the data channel when
# RETR, LIST, NLST, MLSD commands are issued
RETR_DATA = 'abcde12345\r\n' * 1000
LIST_DATA = 'foo\r\nbar\r\n'
NLST_DATA = 'foo\r\nbar\r\n'
MLSD_DATA = ("type=cdir;perm=el;unique==keVO1+ZF4; test\r\n"
             "type=pdir;perm=e;unique==keVO1+d?3; ..\r\n"
             "type=OS.unix=slink:/foobar;perm=;unique==keVO1+4G4; foobar\r\n"
             "type=OS.unix=chr-13/29;perm=;unique==keVO1+5G4; device\r\n"
             "type=OS.unix=blk-11/108;perm=;unique==keVO1+6G4; block\r\n"
             "type=file;perm=awr;unique==keVO1+8G4; writable\r\n"
             "type=dir;perm=cpmel;unique==keVO1+7G4; promiscuous\r\n"
             "type=dir;perm=;unique==keVO1+1t2; no-exec\r\n"
             "type=file;perm=r;unique==keVO1+EG4; two words\r\n"
             "type=file;perm=r;unique==keVO1+IH4;  leading space\r\n"
             "type=file;perm=r;unique==keVO1+1G4; file1\r\n"
             "type=dir;perm=cpmel;unique==keVO1+7G4; incoming\r\n"
             "type=file;perm=r;unique==keVO1+1G4; file2\r\n"
             "type=file;perm=r;unique==keVO1+1G4; file3\r\n"
             "type=file;perm=r;unique==keVO1+1G4; file4\r\n")


class DummyDTPHandler(asynchat.async_chat):
    dtp_conn_closed = False

    def __init__(self, conn, baseclass):
        asynchat.async_chat.__init__(self, conn)
        self.baseclass = baseclass
        self.baseclass.last_received_data = ''

    def handle_read(self):
        self.baseclass.last_received_data += self.recv(1024).decode('ascii')

    def handle_close(self):
        # XXX: this method can be called many times in a row for a single
        # connection, including in clear-text (non-TLS) mode.
        # (behaviour witnessed with test_data_connection)
        if not self.dtp_conn_closed:
            self.baseclass.push('226 transfer complete')
            self.close()
            self.dtp_conn_closed = True

    def push(self, what):
        if self.baseclass.next_data is not None:
            what = self.baseclass.next_data
            self.baseclass.next_data = None
        if not what:
            return self.close_when_done()
        super(DummyDTPHandler, self).push(what.encode('ascii'))

    def handle_error(self):
        raise


class DummyFTPHandler(asynchat.async_chat):

    dtp_handler = DummyDTPHandler

    def __init__(self, conn):
        asynchat.async_chat.__init__(self, conn)
        # tells the socket to handle urgent data inline (ABOR command)
        self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_OOBINLINE, 1)
        self.set_terminator(b"\r\n")
        self.in_buffer = []
        self.dtp = None
        self.last_received_cmd = None
        self.last_received_data = ''
        self.next_response = ''
        self.next_data = None
        self.rest = None
        self.push('220 welcome')

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

    def found_terminator(self):
        line = b''.join(self.in_buffer).decode('ascii')
        self.in_buffer = []
        if self.next_response:
            self.push(self.next_response)
            self.next_response = ''
        cmd = line.split(' ')[0].lower()
        self.last_received_cmd = cmd
        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('550 command "%s" not understood.' %cmd)

    def handle_error(self):
        raise

    def push(self, data):
        asynchat.async_chat.push(self, data.encode('ascii') + b'\r\n')

    def cmd_port(self, arg):
        addr = list(map(int, arg.split(',')))
        ip = '%d.%d.%d.%d' %tuple(addr[:4])
        port = (addr[4] * 256) + addr[5]
        s = socket.create_connection((ip, port), timeout=2)
        self.dtp = self.dtp_handler(s, baseclass=self)
        self.push('200 active data connection established')

    def cmd_pasv(self, arg):
        with socket.socket() as sock:
            sock.bind((self.socket.getsockname()[0], 0))
            sock.listen(5)
            sock.settimeout(10)
            ip, port = sock.getsockname()[:2]
            ip = ip.replace('.', ','); p1 = port / 256; p2 = port % 256
            self.push('227 entering passive mode (%s,%d,%d)' %(ip, p1, p2))
            conn, addr = sock.accept()
            self.dtp = self.dtp_handler(conn, baseclass=self)

    def cmd_eprt(self, arg):
        af, ip, port = arg.split(arg[0])[1:-1]
        port = int(port)
        s = socket.create_connection((ip, port), timeout=2)
        self.dtp = self.dtp_handler(s, baseclass=self)
        self.push('200 active data connection established')

    def cmd_epsv(self, arg):
        with socket.socket(socket.AF_INET6) as sock:
            sock.bind((self.socket.getsockname()[0], 0))
            sock.listen(5)
            sock.settimeout(10)
            port = sock.getsockname()[1]
            self.push('229 entering extended passive mode (|||%d|)' %port)
            conn, addr = sock.accept()
            self.dtp = self.dtp_handler(conn, baseclass=self)

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

    def cmd_noop(self, arg):
        self.push('200 noop ok')

    def cmd_user(self, arg):
        self.push('331 username ok')

    def cmd_pass(self, arg):
        self.push('230 password ok')

    def cmd_acct(self, arg):
        self.push('230 acct ok')

    def cmd_rnfr(self, arg):
        self.push('350 rnfr ok')

    def cmd_rnto(self, arg):
        self.push('250 rnto ok')

    def cmd_dele(self, arg):
        self.push('250 dele ok')

    def cmd_cwd(self, arg):
        self.push('250 cwd ok')

    def cmd_size(self, arg):
        self.push('250 1000')

    def cmd_mkd(self, arg):
        self.push('257 "%s"' %arg)

    def cmd_rmd(self, arg):
        self.push('250 rmd ok')

    def cmd_pwd(self, arg):
        self.push('257 "pwd ok"')

    def cmd_type(self, arg):
        self.push('200 type ok')

    def cmd_quit(self, arg):
        self.push('221 quit ok')
        self.close()

    def cmd_abor(self, arg):
        self.push('226 abor ok')

    def cmd_stor(self, arg):
        self.push('125 stor ok')

    def cmd_rest(self, arg):
        self.rest = arg
        self.push('350 rest ok')

    def cmd_retr(self, arg):
        self.push('125 retr ok')
        if self.rest is not None:
            offset = int(self.rest)
        else:
            offset = 0
        self.dtp.push(RETR_DATA[offset:])
        self.dtp.close_when_done()
        self.rest = None

    def cmd_list(self, arg):
        self.push('125 list ok')
        self.dtp.push(LIST_DATA)
        self.dtp.close_when_done()

    def cmd_nlst(self, arg):
        self.push('125 nlst ok')
        self.dtp.push(NLST_DATA)
        self.dtp.close_when_done()

    def cmd_opts(self, arg):
        self.push('200 opts ok')

    def cmd_mlsd(self, arg):
        self.push('125 mlsd ok')
        self.dtp.push(MLSD_DATA)
        self.dtp.close_when_done()


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

    handler = DummyFTPHandler

    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


if ssl is not None:

    CERTFILE = os.path.join(os.path.dirname(__file__), "keycert.pem")

    class SSLConnection(asyncore.dispatcher):
        """An asyncore.dispatcher subclass supporting TLS/SSL."""

        _ssl_accepting = False
        _ssl_closing = False

        def secure_connection(self):
            socket = ssl.wrap_socket(self.socket, suppress_ragged_eofs=False,
                                     certfile=CERTFILE, server_side=True,
                                     do_handshake_on_connect=False,
                                     ssl_version=ssl.PROTOCOL_SSLv23)
            self.del_channel()
            self.set_socket(socket)
            self._ssl_accepting = True

        def _do_ssl_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 socket.error as err:
                if err.args[0] == errno.ECONNABORTED:
                    return self.handle_close()
            else:
                self._ssl_accepting = False

        def _do_ssl_shutdown(self):
            self._ssl_closing = True
            try:
                self.socket = self.socket.unwrap()
            except ssl.SSLError as err:
                if err.args[0] in (ssl.SSL_ERROR_WANT_READ,
                                   ssl.SSL_ERROR_WANT_WRITE):
                    return
            except socket.error as err:
                # Any "socket error" corresponds to a SSL_ERROR_SYSCALL return
                # from OpenSSL's SSL_shutdown(), corresponding to a
                # closed socket condition. See also:
                # http://www.mail-archive.com/openssl-users@openssl.org/msg60710.html
                pass
            self._ssl_closing = False
            if getattr(self, '_ccc', False) == False:
                super(SSLConnection, self).close()
            else:
                pass

        def handle_read_event(self):
            if self._ssl_accepting:
                self._do_ssl_handshake()
            elif self._ssl_closing:
                self._do_ssl_shutdown()
            else:
                super(SSLConnection, self).handle_read_event()

        def handle_write_event(self):
            if self._ssl_accepting:
                self._do_ssl_handshake()
            elif self._ssl_closing:
                self._do_ssl_shutdown()
            else:
                super(SSLConnection, self).handle_write_event()

        def send(self, data):
            try:
                return super(SSLConnection, self).send(data)
            except ssl.SSLError as err:
                if err.args[0] in (ssl.SSL_ERROR_EOF, ssl.SSL_ERROR_ZERO_RETURN,
                                   ssl.SSL_ERROR_WANT_READ,
                                   ssl.SSL_ERROR_WANT_WRITE):
                    return 0
                raise

        def recv(self, buffer_size):
            try:
                return super(SSLConnection, self).recv(buffer_size)
            except ssl.SSLError as err:
                if err.args[0] in (ssl.SSL_ERROR_WANT_READ,
                                   ssl.SSL_ERROR_WANT_WRITE):
                    return b''
                if err.args[0] in (ssl.SSL_ERROR_EOF, ssl.SSL_ERROR_ZERO_RETURN):
                    self.handle_close()
                    return b''
                raise

        def handle_error(self):
            raise

        def close(self):
            if (isinstance(self.socket, ssl.SSLSocket) and
                self.socket._sslobj is not None):
                self._do_ssl_shutdown()
            else:
                super(SSLConnection, self).close()


    class DummyTLS_DTPHandler(SSLConnection, DummyDTPHandler):
        """A DummyDTPHandler subclass supporting TLS/SSL."""

        def __init__(self, conn, baseclass):
            DummyDTPHandler.__init__(self, conn, baseclass)
            if self.baseclass.secure_data_channel:
                self.secure_connection()


    class DummyTLS_FTPHandler(SSLConnection, DummyFTPHandler):
        """A DummyFTPHandler subclass supporting TLS/SSL."""

        dtp_handler = DummyTLS_DTPHandler

        def __init__(self, conn):
            DummyFTPHandler.__init__(self, conn)
            self.secure_data_channel = False
            self._ccc = False

        def cmd_auth(self, line):
            """Set up secure control channel."""
            self.push('234 AUTH TLS successful')
            self.secure_connection()

        def cmd_ccc(self, line):
            self.push('220 Reverting back to clear-text')
            self._ccc = True
            self._do_ssl_shutdown()

        def cmd_pbsz(self, line):
            """Negotiate size of buffer for secure data transfer.
            For TLS/SSL the only valid value for the parameter is '0'.
            Any other value is accepted but ignored.
            """
            self.push('200 PBSZ=0 successful.')

        def cmd_prot(self, line):
            """Setup un/secure data channel."""
            arg = line.upper()
            if arg == 'C':
                self.push('200 Protection set to Clear')
                self.secure_data_channel = False
            elif arg == 'P':
                self.push('200 Protection set to Private')
                self.secure_data_channel = True
            else:
                self.push("502 Unrecognized PROT type (use C or P).")


    class DummyTLS_FTPServer(DummyFTPServer):
        handler = DummyTLS_FTPHandler


class TestFTPClass(TestCase):

    def setUp(self):
        self.server = DummyFTPServer((HOST, 0))
        self.server.start()
        self.client = ftplib.FTP(timeout=2)
        self.client.connect(self.server.host, self.server.port)

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

    def check_data(self, received, expected):
        self.assertEqual(len(received), len(expected))
        self.assertEqual(received, expected)

    def test_getwelcome(self):
        self.assertEqual(self.client.getwelcome(), '220 welcome')

    def test_sanitize(self):
        self.assertEqual(self.client.sanitize('foo'), repr('foo'))
        self.assertEqual(self.client.sanitize('pass 12345'), repr('pass *****'))
        self.assertEqual(self.client.sanitize('PASS 12345'), repr('PASS *****'))

    def test_exceptions(self):
        self.assertRaises(ftplib.error_temp, self.client.sendcmd, 'echo 400')
        self.assertRaises(ftplib.error_temp, self.client.sendcmd, 'echo 499')
        self.assertRaises(ftplib.error_perm, self.client.sendcmd, 'echo 500')
        self.assertRaises(ftplib.error_perm, self.client.sendcmd, 'echo 599')
        self.assertRaises(ftplib.error_proto, self.client.sendcmd, 'echo 999')

    def test_all_errors(self):
        exceptions = (ftplib.error_reply, ftplib.error_temp, ftplib.error_perm,
                      ftplib.error_proto, ftplib.Error, IOError, EOFError)
        for x in exceptions:
            try:
                raise x('exception not included in all_errors set')
            except ftplib.all_errors:
                pass

    def test_set_pasv(self):
        # passive mode is supposed to be enabled by default
        self.assertTrue(self.client.passiveserver)
        self.client.set_pasv(True)
        self.assertTrue(self.client.passiveserver)
        self.client.set_pasv(False)
        self.assertFalse(self.client.passiveserver)

    def test_voidcmd(self):
        self.client.voidcmd('echo 200')
        self.client.voidcmd('echo 299')
        self.assertRaises(ftplib.error_reply, self.client.voidcmd, 'echo 199')
        self.assertRaises(ftplib.error_reply, self.client.voidcmd, 'echo 300')

    def test_login(self):
        self.client.login()

    def test_acct(self):
        self.client.acct('passwd')

    def test_rename(self):
        self.client.rename('a', 'b')
        self.server.handler_instance.next_response = '200'
        self.assertRaises(ftplib.error_reply, self.client.rename, 'a', 'b')

    def test_delete(self):
        self.client.delete('foo')
        self.server.handler_instance.next_response = '199'
        self.assertRaises(ftplib.error_reply, self.client.delete, 'foo')

    def test_size(self):
        self.client.size('foo')

    def test_mkd(self):
        dir = self.client.mkd('/foo')
        self.assertEqual(dir, '/foo')

    def test_rmd(self):
        self.client.rmd('foo')

    def test_pwd(self):
        dir = self.client.pwd()
        self.assertEqual(dir, 'pwd ok')

    def test_quit(self):
        self.assertEqual(self.client.quit(), '221 quit ok')
        # Ensure the connection gets closed; sock attribute should be None
        self.assertEqual(self.client.sock, None)

    def test_abort(self):
        self.client.abort()

    def test_retrbinary(self):
        def callback(data):
            received.append(data.decode('ascii'))
        received = []
        self.client.retrbinary('retr', callback)
        self.check_data(''.join(received), RETR_DATA)

    def test_retrbinary_rest(self):
        def callback(data):
            received.append(data.decode('ascii'))
        for rest in (0, 10, 20):
            received = []
            self.client.retrbinary('retr', callback, rest=rest)
            self.check_data(''.join(received), RETR_DATA[rest:])

    def test_retrlines(self):
        received = []
        self.client.retrlines('retr', received.append)
        self.check_data(''.join(received), RETR_DATA.replace('\r\n', ''))

    def test_storbinary(self):
        f = io.BytesIO(RETR_DATA.encode('ascii'))
        self.client.storbinary('stor', f)
        self.check_data(self.server.handler_instance.last_received_data, RETR_DATA)
        # test new callback arg
        flag = []
        f.seek(0)
        self.client.storbinary('stor', f, callback=lambda x: flag.append(None))
        self.assertTrue(flag)

    def test_storbinary_rest(self):
        f = io.BytesIO(RETR_DATA.replace('\r\n', '\n').encode('ascii'))
        for r in (30, '30'):
            f.seek(0)
            self.client.storbinary('stor', f, rest=r)
            self.assertEqual(self.server.handler_instance.rest, str(r))

    def test_storlines(self):
        f = io.BytesIO(RETR_DATA.replace('\r\n', '\n').encode('ascii'))
        self.client.storlines('stor', f)
        self.check_data(self.server.handler_instance.last_received_data, RETR_DATA)
        # test new callback arg
        flag = []
        f.seek(0)
        self.client.storlines('stor foo', f, callback=lambda x: flag.append(None))
        self.assertTrue(flag)

    def test_nlst(self):
        self.client.nlst()
        self.assertEqual(self.client.nlst(), NLST_DATA.split('\r\n')[:-1])

    def test_dir(self):
        l = []
        self.client.dir(lambda x: l.append(x))
        self.assertEqual(''.join(l), LIST_DATA.replace('\r\n', ''))

    def test_mlsd(self):
        list(self.client.mlsd())
        list(self.client.mlsd(path='/'))
        list(self.client.mlsd(path='/', facts=['size', 'type']))

        ls = list(self.client.mlsd())
        for name, facts in ls:
            self.assertIsInstance(name, str)
            self.assertIsInstance(facts, dict)
            self.assertTrue(name)
            self.assertIn('type', facts)
            self.assertIn('perm', facts)
            self.assertIn('unique', facts)

        def set_data(data):
            self.server.handler_instance.next_data = data

        def test_entry(line, type=None, perm=None, unique=None, name=None):
            type = 'type' if type is None else type
            perm = 'perm' if perm is None else perm
            unique = 'unique' if unique is None else unique
            name = 'name' if name is None else name
            set_data(line)
            _name, facts = next(self.client.mlsd())
            self.assertEqual(_name, name)
            self.assertEqual(facts['type'], type)
            self.assertEqual(facts['perm'], perm)
            self.assertEqual(facts['unique'], unique)

        # plain
        test_entry('type=type;perm=perm;unique=unique; name\r\n')
        # "=" in fact value
        test_entry('type=ty=pe;perm=perm;unique=unique; name\r\n', type="ty=pe")
        test_entry('type==type;perm=perm;unique=unique; name\r\n', type="=type")
        test_entry('type=t=y=pe;perm=perm;unique=unique; name\r\n', type="t=y=pe")
        test_entry('type=====;perm=perm;unique=unique; name\r\n', type="====")
        # spaces in name
        test_entry('type=type;perm=perm;unique=unique; na me\r\n', name="na me")
        test_entry('type=type;perm=perm;unique=unique; name \r\n', name="name ")
        test_entry('type=type;perm=perm;unique=unique;  name\r\n', name=" name")
        test_entry('type=type;perm=perm;unique=unique; n am  e\r\n', name="n am  e")
        # ";" in name
        test_entry('type=type;perm=perm;unique=unique; na;me\r\n', name="na;me")
        test_entry('type=type;perm=perm;unique=unique; ;name\r\n', name=";name")
        test_entry('type=type;perm=perm;unique=unique; ;name;\r\n', name=";name;")
        test_entry('type=type;perm=perm;unique=unique; ;;;;\r\n', name=";;;;")
        # case sensitiveness
        set_data('Type=type;TyPe=perm;UNIQUE=unique; name\r\n')
        _name, facts = next(self.client.mlsd())
        for x in facts:
            self.assertTrue(x.islower())
        # no data (directory empty)
        set_data('')
        self.assertRaises(StopIteration, next, self.client.mlsd())
        set_data('')
        for x in self.client.mlsd():
            self.fail("unexpected data %s" % data)

    def test_makeport(self):
        with self.client.makeport():
            # IPv4 is in use, just make sure send_eprt has not been used
            self.assertEqual(self.server.handler_instance.last_received_cmd,
                                'port')

    def test_makepasv(self):
        host, port = self.client.makepasv()
        conn = socket.create_connection((host, port), 10)
        conn.close()
        # IPv4 is in use, just make sure send_epsv has not been used
        self.assertEqual(self.server.handler_instance.last_received_cmd, 'pasv')

    def test_with_statement(self):
        self.client.quit()

        def is_client_connected():
            if self.client.sock is None:
                return False
            try:
                self.client.sendcmd('noop')
            except (socket.error, EOFError):
                return False
            return True

        # base test
        with ftplib.FTP(timeout=2) as self.client:
            self.client.connect(self.server.host, self.server.port)
            self.client.sendcmd('noop')
            self.assertTrue(is_client_connected())
        self.assertEqual(self.server.handler_instance.last_received_cmd, 'quit')
        self.assertFalse(is_client_connected())

        # QUIT sent inside the with block
        with ftplib.FTP(timeout=2) as self.client:
            self.client.connect(self.server.host, self.server.port)
            self.client.sendcmd('noop')
            self.client.quit()
        self.assertEqual(self.server.handler_instance.last_received_cmd, 'quit')
        self.assertFalse(is_client_connected())

        # force a wrong response code to be sent on QUIT: error_perm
        # is expected and the connection is supposed to be closed
        try:
            with ftplib.FTP(timeout=2) as self.client:
                self.client.connect(self.server.host, self.server.port)
                self.client.sendcmd('noop')
                self.server.handler_instance.next_response = '550 error on quit'
        except ftplib.error_perm as err:
            self.assertEqual(str(err), '550 error on quit')
        else:
            self.fail('Exception not raised')
        # needed to give the threaded server some time to set the attribute
        # which otherwise would still be == 'noop'
        time.sleep(0.1)
        self.assertEqual(self.server.handler_instance.last_received_cmd, 'quit')
        self.assertFalse(is_client_connected())

    def test_source_address(self):
        self.client.quit()
        port = support.find_unused_port()
        try:
            self.client.connect(self.server.host, self.server.port,
                                source_address=(HOST, port))
            self.assertEqual(self.client.sock.getsockname()[1], port)
            self.client.quit()
        except IOError as e:
            if e.errno == errno.EADDRINUSE:
                self.skipTest("couldn't bind to port %d" % port)
            raise

    def test_source_address_passive_connection(self):
        port = support.find_unused_port()
        self.client.source_address = (HOST, port)
        try:
            with self.client.transfercmd('list') as sock:
                self.assertEqual(sock.getsockname()[1], port)
        except IOError as e:
            if e.errno == errno.EADDRINUSE:
                self.skipTest("couldn't bind to port %d" % port)
            raise

    def test_parse257(self):
        self.assertEqual(ftplib.parse257('257 "/foo/bar"'), '/foo/bar')
        self.assertEqual(ftplib.parse257('257 "/foo/bar" created'), '/foo/bar')
        self.assertEqual(ftplib.parse257('257 ""'), '')
        self.assertEqual(ftplib.parse257('257 "" created'), '')
        self.assertRaises(ftplib.error_reply, ftplib.parse257, '250 "/foo/bar"')
        # The 257 response is supposed to include the directory
        # name and in case it contains embedded double-quotes
        # they must be doubled (see RFC-959, chapter 7, appendix 2).
        self.assertEqual(ftplib.parse257('257 "/foo/b""ar"'), '/foo/b"ar')
        self.assertEqual(ftplib.parse257('257 "/foo/b""ar" created'), '/foo/b"ar')


class TestIPv6Environment(TestCase):

    def setUp(self):
        self.server = DummyFTPServer(('::1', 0), af=socket.AF_INET6)
        self.server.start()
        self.client = ftplib.FTP()
        self.client.connect(self.server.host, self.server.port)

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

    def test_af(self):
        self.assertEqual(self.client.af, socket.AF_INET6)

    def test_makeport(self):
        with self.client.makeport():
            self.assertEqual(self.server.handler_instance.last_received_cmd,
                                'eprt')

    def test_makepasv(self):
        host, port = self.client.makepasv()
        conn = socket.create_connection((host, port), 10)
        conn.close()
        self.assertEqual(self.server.handler_instance.last_received_cmd, 'epsv')

    def test_transfer(self):
        def retr():
            def callback(data):
                received.append(data.decode('ascii'))
            received = []
            self.client.retrbinary('retr', callback)
            self.assertEqual(len(''.join(received)), len(RETR_DATA))
            self.assertEqual(''.join(received), RETR_DATA)
        self.client.set_pasv(True)
        retr()
        self.client.set_pasv(False)
        retr()


class TestTLS_FTPClassMixin(TestFTPClass):
    """Repeat TestFTPClass tests starting the TLS layer for both control
    and data connections first.
    """

    def setUp(self):
        self.server = DummyTLS_FTPServer((HOST, 0))
        self.server.start()
        self.client = ftplib.FTP_TLS(timeout=2)
        self.client.connect(self.server.host, self.server.port)
        # enable TLS
        self.client.auth()
        self.client.prot_p()


class TestTLS_FTPClass(TestCase):
    """Specific TLS_FTP class tests."""

    def setUp(self):
        self.server = DummyTLS_FTPServer((HOST, 0))
        self.server.start()
        self.client = ftplib.FTP_TLS(timeout=2)
        self.client.connect(self.server.host, self.server.port)

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

    def test_control_connection(self):
        self.assertNotIsInstance(self.client.sock, ssl.SSLSocket)
        self.client.auth()
        self.assertIsInstance(self.client.sock, ssl.SSLSocket)

    def test_data_connection(self):
        # clear text
        with self.client.transfercmd('list') as sock:
            self.assertNotIsInstance(sock, ssl.SSLSocket)
        self.assertEqual(self.client.voidresp(), "226 transfer complete")

        # secured, after PROT P
        self.client.prot_p()
        with self.client.transfercmd('list') as sock:
            self.assertIsInstance(sock, ssl.SSLSocket)
        self.assertEqual(self.client.voidresp(), "226 transfer complete")

        # PROT C is issued, the connection must be in cleartext again
        self.client.prot_c()
        with self.client.transfercmd('list') as sock:
            self.assertNotIsInstance(sock, ssl.SSLSocket)
        self.assertEqual(self.client.voidresp(), "226 transfer complete")

    def test_login(self):
        # login() is supposed to implicitly secure the control connection
        self.assertNotIsInstance(self.client.sock, ssl.SSLSocket)
        self.client.login()
        self.assertIsInstance(self.client.sock, ssl.SSLSocket)
        # make sure that AUTH TLS doesn't get issued again
        self.client.login()

    def test_auth_issued_twice(self):
        self.client.auth()
        self.assertRaises(ValueError, self.client.auth)

    def test_auth_ssl(self):
        try:
            self.client.ssl_version = ssl.PROTOCOL_SSLv3
            self.client.auth()
            self.assertRaises(ValueError, self.client.auth)
        finally:
            self.client.ssl_version = ssl.PROTOCOL_TLSv1

    def test_context(self):
        self.client.quit()
        ctx = ssl.SSLContext(ssl.PROTOCOL_TLSv1)
        self.assertRaises(ValueError, ftplib.FTP_TLS, keyfile=CERTFILE,
                          context=ctx)
        self.assertRaises(ValueError, ftplib.FTP_TLS, certfile=CERTFILE,
                          context=ctx)
        self.assertRaises(ValueError, ftplib.FTP_TLS, certfile=CERTFILE,
                          keyfile=CERTFILE, context=ctx)

        self.client = ftplib.FTP_TLS(context=ctx, timeout=2)
        self.client.connect(self.server.host, self.server.port)
        self.assertNotIsInstance(self.client.sock, ssl.SSLSocket)
        self.client.auth()
        self.assertIs(self.client.sock.context, ctx)
        self.assertIsInstance(self.client.sock, ssl.SSLSocket)

        self.client.prot_p()
        with self.client.transfercmd('list') as sock:
            self.assertIs(sock.context, ctx)
            self.assertIsInstance(sock, ssl.SSLSocket)

    def test_ccc(self):
        self.assertRaises(ValueError, self.client.ccc)
        self.client.login(secure=True)
        self.assertIsInstance(self.client.sock, ssl.SSLSocket)
        self.client.ccc()
        self.assertRaises(ValueError, self.client.sock.unwrap)


class TestTimeouts(TestCase):

    def setUp(self):
        self.evt = threading.Event()
        self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.sock.settimeout(10)
        self.port = support.bind_port(self.sock)
        threading.Thread(target=self.server, args=(self.evt,self.sock)).start()
        # Wait for the server to be ready.
        self.evt.wait()
        self.evt.clear()
        ftplib.FTP.port = self.port

    def tearDown(self):
        self.evt.wait()
        self.sock.close()

    def server(self, evt, serv):
        # This method sets the evt 3 times:
        #  1) when the connection is ready to be accepted.
        #  2) when it is safe for the caller to close the connection
        #  3) when we have closed the socket
        serv.listen(5)
        # (1) Signal the caller that we are ready to accept the connection.
        evt.set()
        try:
            conn, addr = serv.accept()
        except socket.timeout:
            pass
        else:
            conn.send(b"1 Hola mundo\n")
            # (2) Signal the caller that it is safe to close the socket.
            evt.set()
            conn.close()
        finally:
            serv.close()
            # (3) Signal the caller that we are done.
            evt.set()

    def testTimeoutDefault(self):
        # default -- use global socket timeout
        self.assertTrue(socket.getdefaulttimeout() is None)
        socket.setdefaulttimeout(30)
        try:
            ftp = ftplib.FTP("localhost")
        finally:
            socket.setdefaulttimeout(None)
        self.assertEqual(ftp.sock.gettimeout(), 30)
        self.evt.wait()
        ftp.close()

    def testTimeoutNone(self):
        # no timeout -- do not use global socket timeout
        self.assertTrue(socket.getdefaulttimeout() is None)
        socket.setdefaulttimeout(30)
        try:
            ftp = ftplib.FTP("localhost", timeout=None)
        finally:
            socket.setdefaulttimeout(None)
        self.assertTrue(ftp.sock.gettimeout() is None)
        self.evt.wait()
        ftp.close()

    def testTimeoutValue(self):
        # a value
        ftp = ftplib.FTP(HOST, timeout=30)
        self.assertEqual(ftp.sock.gettimeout(), 30)
        self.evt.wait()
        ftp.close()

    def testTimeoutConnect(self):
        ftp = ftplib.FTP()
        ftp.connect(HOST, timeout=30)
        self.assertEqual(ftp.sock.gettimeout(), 30)
        self.evt.wait()
        ftp.close()

    def testTimeoutDifferentOrder(self):
        ftp = ftplib.FTP(timeout=30)
        ftp.connect(HOST)
        self.assertEqual(ftp.sock.gettimeout(), 30)
        self.evt.wait()
        ftp.close()

    def testTimeoutDirectAccess(self):
        ftp = ftplib.FTP()
        ftp.timeout = 30
        ftp.connect(HOST)
        self.assertEqual(ftp.sock.gettimeout(), 30)
        self.evt.wait()
        ftp.close()


def test_main():
    tests = [TestFTPClass, TestTimeouts]
    if support.IPV6_ENABLED:
        tests.append(TestIPv6Environment)

    if ssl is not None:
        tests.extend([TestTLS_FTPClassMixin, TestTLS_FTPClass])

    thread_info = support.threading_setup()
    try:
        support.run_unittest(*tests)
    finally:
        support.threading_cleanup(*thread_info)


if __name__ == '__main__':
    test_main()