75
95
_number_of_retries = 2
76
96
_sleep_between_retries = 5
78
# FIXME: there are inconsistencies in the way temporary errors are
79
# handled. Sometimes we reconnect, sometimes we raise an exception. Care should
80
# be taken to analyze the implications for write operations (read operations
81
# are safe to retry). Overall even some read operations are never
82
# retried. --vila 20070720 (Bug #127164)
83
class FtpTransport(ConnectedTransport):
98
class FtpTransport(Transport):
84
99
"""This is the transport agent for ftp:// access."""
86
def __init__(self, base, _from_transport=None):
101
def __init__(self, base, _provided_instance=None):
87
102
"""Set the base path where files will be stored."""
88
if not (base.startswith('ftp://') or base.startswith('aftp://')):
89
raise ValueError(base)
90
super(FtpTransport, self).__init__(base,
91
_from_transport=_from_transport)
92
self._unqualified_scheme = 'ftp'
93
if self._scheme == 'aftp':
96
self.is_active = False
98
# Most modern FTP servers support the APPE command. If ours doesn't, we
99
# (re)set this flag accordingly later.
100
self._has_append = True
103
assert base.startswith('ftp://') or base.startswith('aftp://')
105
self.is_active = base.startswith('aftp://')
107
# urlparse won't handle aftp://
109
if not base.endswith('/'):
111
(self._proto, self._username,
112
self._password, self._host,
113
self._port, self._path) = split_url(base)
114
base = self._unparse_url()
116
super(FtpTransport, self).__init__(base)
117
self._FTP_instance = _provided_instance
119
def _unparse_url(self, path=None):
122
path = urllib.quote(path)
123
netloc = urllib.quote(self._host)
124
if self._username is not None:
125
netloc = '%s@%s' % (urllib.quote(self._username), netloc)
126
if self._port is not None:
127
netloc = '%s:%d' % (netloc, self._port)
131
return urlparse.urlunparse((proto, netloc, path, '', '', ''))
102
133
def _get_FTP(self):
103
134
"""Return the ftplib.FTP instance for this object."""
104
# Ensures that a connection is established
105
connection = self._get_connection()
106
if connection is None:
107
# First connection ever
108
connection, credentials = self._create_connection()
109
self._set_connection(connection, credentials)
112
connection_class = ftplib.FTP
114
def _create_connection(self, credentials=None):
115
"""Create a new connection with the provided credentials.
117
:param credentials: The credentials needed to establish the connection.
119
:return: The created connection and its associated credentials.
121
The input credentials are only the password as it may have been
122
entered interactively by the user and may be different from the one
123
provided in base url at transport creation time. The returned
124
credentials are username, password.
126
if credentials is None:
127
user, password = self._user, self._password
129
user, password = credentials
131
auth = config.AuthenticationConfig()
133
user = auth.get_user('ftp', self._host, port=self._port,
134
default=getpass.getuser())
135
mutter("Constructing FTP instance against %r" %
136
((self._host, self._port, user, '********',
135
if self._FTP_instance is not None:
136
return self._FTP_instance
139
connection = self.connection_class()
140
connection.connect(host=self._host, port=self._port)
141
self._login(connection, auth, user, password)
142
connection.set_pasv(not self.is_active)
143
# binary mode is the default
144
connection.voidcmd('TYPE I')
145
except socket.error, e:
146
raise errors.SocketConnectionError(self._host, self._port,
147
msg='Unable to connect to',
139
self._FTP_instance = _find_FTP(self._host, self._port,
140
self._username, self._password,
142
return self._FTP_instance
149
143
except ftplib.error_perm, e:
150
raise errors.TransportError(msg="Error setting up connection:"
151
" %s" % str(e), orig_error=e)
152
return connection, (user, password)
154
def _login(self, connection, auth, user, password):
155
# '' is a valid password
156
if user and user != 'anonymous' and password is None:
157
password = auth.get_password('ftp', self._host,
158
user, port=self._port)
159
connection.login(user=user, passwd=password)
161
def _reconnect(self):
162
"""Create a new connection with the previously used credentials"""
163
credentials = self._get_credentials()
164
connection, credentials = self._create_connection(credentials)
165
self._set_connection(connection, credentials)
167
def _translate_ftp_error(self, err, path, extra=None,
168
unknown_exc=FtpPathError):
169
"""Try to translate an ftplib exception to a bzrlib exception.
144
raise errors.TransportError(msg="Error setting up connection: %s"
145
% str(e), orig_error=e)
147
def _translate_perm_error(self, err, path, extra=None, unknown_exc=FtpPathError):
148
"""Try to translate an ftplib.error_perm exception.
171
150
:param err: The error to translate into a bzr error
172
151
:param path: The path which had problems
185
161
if ('no such file' in s
186
162
or 'could not open' in s
187
163
or 'no such dir' in s
188
or 'could not create file' in s # vsftpd
189
or 'file doesn\'t exist' in s
190
or 'rnfr command failed.' in s # vsftpd RNFR reply if file not found
191
or 'file/directory not found' in s # filezilla server
192
# Microsoft FTP-Service RNFR reply if file not found
193
or (s.startswith('550 ') and 'unable to rename to' in extra)
195
165
raise errors.NoSuchFile(path, extra=extra)
196
elif ('file exists' in s):
166
if ('file exists' in s):
197
167
raise errors.FileExists(path, extra=extra)
198
elif ('not a directory' in s):
168
if ('not a directory' in s):
199
169
raise errors.PathError(path, extra=extra)
200
elif 'directory not empty' in s:
201
raise errors.DirectoryNotEmpty(path, extra=extra)
203
171
mutter('unable to understand error for path: %s: %s', path, err)
206
174
raise unknown_exc(path, extra=extra)
207
# TODO: jam 20060516 Consider re-raising the error wrapped in
175
# TODO: jam 20060516 Consider re-raising the error wrapped in
208
176
# something like TransportError, but this loses the traceback
209
177
# Also, 'sftp' has a generic 'Failure' mode, which we use failure_exc
210
178
# to handle. Consider doing something like that here.
211
179
#raise TransportError(msg='Error for path: %s' % (path,), orig_error=e)
182
def should_cache(self):
183
"""Return True if the data pulled across should be cached locally.
187
def clone(self, offset=None):
188
"""Return a new FtpTransport with root at self.base + offset.
192
return FtpTransport(self.base, self._FTP_instance)
194
return FtpTransport(self.abspath(offset), self._FTP_instance)
196
def _abspath(self, relpath):
197
assert isinstance(relpath, basestring)
198
relpath = urlutils.unescape(relpath)
199
if relpath.startswith('/'):
202
basepath = self._path.split('/')
203
if len(basepath) > 0 and basepath[-1] == '':
204
basepath = basepath[:-1]
205
for p in relpath.split('/'):
207
if len(basepath) == 0:
208
# In most filesystems, a request for the parent
209
# of root, just returns root.
212
elif p == '.' or p == '':
216
# Possibly, we could use urlparse.urljoin() here, but
217
# I'm concerned about when it chooses to strip the last
218
# portion of the path, and when it doesn't.
220
# XXX: It seems that ftplib does not handle Unicode paths
221
# at the same time, medusa won't handle utf8 paths
222
# So if we .encode(utf8) here, then we get a Server failure.
223
# while if we use str(), we get a UnicodeError, and the test suite
224
# just skips testing UnicodePaths.
225
return str('/'.join(basepath) or '/')
227
def abspath(self, relpath):
228
"""Return the full url to the given relative path.
229
This can be supplied with a string or a list
231
path = self._abspath(relpath)
232
return self._unparse_url(path)
214
234
def has(self, relpath):
215
235
"""Does the target location exist?"""
216
236
# FIXME jam 20060516 We *do* ask about directories in the test suite
342
340
warning("FTP control connection closed. Trying to reopen.")
343
341
time.sleep(_sleep_between_retries)
342
self._FTP_instance = None
345
343
self.put_file(relpath, fp, mode, retries+1)
347
345
def mkdir(self, relpath, mode=None):
348
346
"""Create a directory at the given path."""
349
abspath = self._remote_path(relpath)
347
abspath = self._abspath(relpath)
351
349
mutter("FTP mkd: %s", abspath)
352
350
f = self._get_FTP()
354
self._setmode(relpath, mode)
355
352
except ftplib.error_perm, e:
356
self._translate_ftp_error(e, abspath,
353
self._translate_perm_error(e, abspath,
357
354
unknown_exc=errors.FileExists)
359
def open_write_stream(self, relpath, mode=None):
360
"""See Transport.open_write_stream."""
361
self.put_bytes(relpath, "", mode)
362
result = AppendBasedFileStream(self, relpath)
363
_file_streams[self.abspath(relpath)] = result
366
def recommended_page_size(self):
367
"""See Transport.recommended_page_size().
369
For FTP we suggest a large page size to reduce the overhead
370
introduced by latency.
374
356
def rmdir(self, rel_path):
375
357
"""Delete the directory at rel_path"""
376
abspath = self._remote_path(rel_path)
358
abspath = self._abspath(rel_path)
378
360
mutter("FTP rmd: %s", abspath)
379
361
f = self._get_FTP()
381
363
except ftplib.error_perm, e:
382
self._translate_ftp_error(e, abspath, unknown_exc=errors.PathError)
364
self._translate_perm_error(e, abspath, unknown_exc=errors.PathError)
384
366
def append_file(self, relpath, f, mode=None):
385
367
"""Append the text in the file-like object into the final
389
abspath = self._remote_path(relpath)
370
abspath = self._abspath(relpath)
390
371
if self.has(relpath):
391
372
ftp = self._get_FTP()
392
373
result = ftp.size(abspath)
397
mutter("FTP appe to %s", abspath)
398
self._try_append(relpath, text, mode)
400
self._fallback_append(relpath, text, mode)
377
mutter("FTP appe to %s", abspath)
378
self._try_append(relpath, f.read(), mode)
404
382
def _try_append(self, relpath, text, mode=None, retries=0):
405
383
"""Try repeatedly to append the given text to the file at relpath.
407
385
This is a recursive function. On errors, it will be called until the
408
386
number of retries is exceeded.
411
abspath = self._remote_path(relpath)
389
abspath = self._abspath(relpath)
412
390
mutter("FTP appe (try %d) to %s", retries, abspath)
413
391
ftp = self._get_FTP()
392
ftp.voidcmd("TYPE I")
414
393
cmd = "APPE %s" % abspath
415
394
conn = ftp.transfercmd(cmd)
416
395
conn.sendall(text)
418
self._setmode(relpath, mode)
398
self._setmode(relpath, mode)
420
400
except ftplib.error_perm, e:
421
# Check whether the command is not supported (reply code 502)
422
if str(e).startswith('502 '):
423
warning("FTP server does not support file appending natively. "
424
"Performance may be severely degraded! (%s)", e)
425
self._has_append = False
426
self._fallback_append(relpath, text, mode)
428
self._translate_ftp_error(e, abspath, extra='error appending',
429
unknown_exc=errors.NoSuchFile)
401
self._translate_perm_error(e, abspath, extra='error appending',
402
unknown_exc=errors.NoSuchFile)
430
403
except ftplib.error_temp, e:
431
404
if retries > _number_of_retries:
432
raise errors.TransportError(
433
"FTP temporary error during APPEND %s. Aborting."
434
% abspath, orig_error=e)
405
raise errors.TransportError("FTP temporary error during APPEND %s." \
406
"Aborting." % abspath, orig_error=e)
436
408
warning("FTP temporary error: %s. Retrying.", str(e))
409
self._FTP_instance = None
438
410
self._try_append(relpath, text, mode, retries+1)
440
def _fallback_append(self, relpath, text, mode = None):
441
remote = self.get(relpath)
442
remote.seek(0, os.SEEK_END)
445
return self.put_file(relpath, remote, mode)
447
412
def _setmode(self, relpath, mode):
448
413
"""Set permissions on a path.
450
415
Only set permissions if the FTP server supports the 'SITE CHMOD'
455
mutter("FTP site chmod: setting permissions to %s on %s",
456
oct(mode), self._remote_path(relpath))
457
ftp = self._get_FTP()
458
cmd = "SITE CHMOD %s %s" % (oct(mode),
459
self._remote_path(relpath))
461
except ftplib.error_perm, e:
462
# Command probably not available on this server
463
warning("FTP Could not set permissions to %s on %s. %s",
464
oct(mode), self._remote_path(relpath), str(e))
419
mutter("FTP site chmod: setting permissions to %s on %s",
420
str(mode), self._abspath(relpath))
421
ftp = self._get_FTP()
422
cmd = "SITE CHMOD %s %s" % (self._abspath(relpath), str(mode))
424
except ftplib.error_perm, e:
425
# Command probably not available on this server
426
warning("FTP Could not set permissions to %s on %s. %s",
427
str(mode), self._abspath(relpath), str(e))
466
429
# TODO: jam 20060516 I believe ftp allows you to tell an ftp server
467
430
# to copy something to another machine. And you may be able
468
431
# to give it its own address as the 'to' location.
469
432
# So implement a fancier 'copy()'
471
def rename(self, rel_from, rel_to):
472
abs_from = self._remote_path(rel_from)
473
abs_to = self._remote_path(rel_to)
474
mutter("FTP rename: %s => %s", abs_from, abs_to)
476
return self._rename(abs_from, abs_to, f)
478
def _rename(self, abs_from, abs_to, f):
480
f.rename(abs_from, abs_to)
481
except (ftplib.error_temp, ftplib.error_perm), e:
482
self._translate_ftp_error(e, abs_from,
483
': unable to rename to %r' % (abs_to))
485
434
def move(self, rel_from, rel_to):
486
435
"""Move the item at rel_from to the location at rel_to"""
487
abs_from = self._remote_path(rel_from)
488
abs_to = self._remote_path(rel_to)
436
abs_from = self._abspath(rel_from)
437
abs_to = self._abspath(rel_to)
490
439
mutter("FTP mv: %s => %s", abs_from, abs_to)
491
440
f = self._get_FTP()
492
self._rename_and_overwrite(abs_from, abs_to, f)
441
f.rename(abs_from, abs_to)
493
442
except ftplib.error_perm, e:
494
self._translate_ftp_error(e, abs_from,
495
extra='unable to rename to %r' % (rel_to,),
443
self._translate_perm_error(e, abs_from,
444
extra='unable to rename to %r' % (rel_to,),
496
445
unknown_exc=errors.PathError)
498
def _rename_and_overwrite(self, abs_from, abs_to, f):
499
"""Do a fancy rename on the remote server.
501
Using the implementation provided by osutils.
503
osutils.fancy_rename(abs_from, abs_to,
504
rename_func=lambda p1, p2: self._rename(p1, p2, f),
505
unlink_func=lambda p: self._delete(p, f))
507
449
def delete(self, relpath):
508
450
"""Delete the item at relpath"""
509
abspath = self._remote_path(relpath)
511
self._delete(abspath, f)
513
def _delete(self, abspath, f):
451
abspath = self._abspath(relpath)
515
453
mutter("FTP rm: %s", abspath)
516
455
f.delete(abspath)
517
456
except ftplib.error_perm, e:
518
self._translate_ftp_error(e, abspath, 'error deleting',
457
self._translate_perm_error(e, abspath, 'error deleting',
519
458
unknown_exc=errors.NoSuchFile)
521
def external_url(self):
522
"""See bzrlib.transport.Transport.external_url."""
523
# FTP URL's are externally usable.
526
460
def listable(self):
527
461
"""See Transport.listable."""
530
464
def list_dir(self, relpath):
531
465
"""See Transport.list_dir."""
532
basepath = self._remote_path(relpath)
466
basepath = self._abspath(relpath)
533
467
mutter("FTP nlst: %s", basepath)
534
468
f = self._get_FTP()
537
paths = f.nlst(basepath)
538
except ftplib.error_perm, e:
539
self._translate_ftp_error(e, relpath,
540
extra='error with list_dir')
541
except ftplib.error_temp, e:
542
# xs4all's ftp server raises a 450 temp error when listing an
543
# empty directory. Check for that and just return an empty list
544
# in that case. See bug #215522
545
if str(e).lower().startswith('450 no files found'):
546
mutter('FTP Server returned "%s" for nlst.'
547
' Assuming it means empty directory',
552
# Restore binary mode as nlst switch to ascii mode to retrieve file
470
paths = f.nlst(basepath)
471
except ftplib.error_perm, e:
472
self._translate_perm_error(e, relpath, extra='error with list_dir')
556
473
# If FTP.nlst returns paths prefixed by relpath, strip 'em
557
474
if paths and paths[0].startswith(basepath):
558
475
entries = [path[len(basepath)+1:] for path in paths]
609
526
return self.lock_read(relpath)
529
class FtpServer(Server):
530
"""Common code for SFTP server facilities."""
534
self._ftp_server = None
536
self._async_thread = None
541
"""Calculate an ftp url to this server."""
542
return 'ftp://foo:bar@localhost:%d/' % (self._port)
544
# def get_bogus_url(self):
545
# """Return a URL which cannot be connected to."""
546
# return 'ftp://127.0.0.1:1'
548
def log(self, message):
549
"""This is used by medusa.ftp_server to log connections, etc."""
550
self.logs.append(message)
555
raise RuntimeError('Must have medusa to run the FtpServer')
557
self._root = os.getcwdu()
558
self._ftp_server = _ftp_server(
559
authorizer=_test_authorizer(root=self._root),
561
port=0, # bind to a random port
563
logger_object=self # Use FtpServer.log() for messages
565
self._port = self._ftp_server.getsockname()[1]
566
# Don't let it loop forever, or handle an infinite number of requests.
567
# In this case it will run for 100s, or 1000 requests
568
self._async_thread = threading.Thread(target=asyncore.loop,
569
kwargs={'timeout':0.1, 'count':1000})
570
self._async_thread.setDaemon(True)
571
self._async_thread.start()
574
"""See bzrlib.transport.Server.tearDown."""
575
# have asyncore release the channel
576
self._ftp_server.del_channel()
578
self._async_thread.join()
583
_test_authorizer = None
587
global _have_medusa, _ftp_channel, _ftp_server, _test_authorizer
590
import medusa.filesys
591
import medusa.ftp_server
597
class test_authorizer(object):
598
"""A custom Authorizer object for running the test suite.
600
The reason we cannot use dummy_authorizer, is because it sets the
601
channel to readonly, which we don't always want to do.
604
def __init__(self, root):
607
def authorize(self, channel, username, password):
608
"""Return (success, reply_string, filesystem)"""
610
return 0, 'No Medusa.', None
612
channel.persona = -1, -1
613
if username == 'anonymous':
614
channel.read_only = 1
616
channel.read_only = 0
618
return 1, 'OK.', medusa.filesys.os_filesystem(self.root)
621
class ftp_channel(medusa.ftp_server.ftp_channel):
622
"""Customized ftp channel"""
624
def log(self, message):
625
"""Redirect logging requests."""
626
mutter('_ftp_channel: %s', message)
628
def log_info(self, message, type='info'):
629
"""Redirect logging requests."""
630
mutter('_ftp_channel %s: %s', type, message)
632
def cmd_rnfr(self, line):
633
"""Prepare for renaming a file."""
634
self._renaming = line[1]
635
self.respond('350 Ready for RNTO')
636
# TODO: jam 20060516 in testing, the ftp server seems to
637
# check that the file already exists, or it sends
638
# 550 RNFR command failed
640
def cmd_rnto(self, line):
641
"""Rename a file based on the target given.
643
rnto must be called after calling rnfr.
645
if not self._renaming:
646
self.respond('503 RNFR required first.')
647
pfrom = self.filesystem.translate(self._renaming)
648
self._renaming = None
649
pto = self.filesystem.translate(line[1])
651
os.rename(pfrom, pto)
652
except (IOError, OSError), e:
653
# TODO: jam 20060516 return custom responses based on
654
# why the command failed
655
self.respond('550 RNTO failed: %s' % (e,))
657
self.respond('550 RNTO failed')
658
# For a test server, we will go ahead and just die
661
self.respond('250 Rename successful.')
663
def cmd_size(self, line):
664
"""Return the size of a file
666
This is overloaded to help the test suite determine if the
667
target is a directory.
670
if not self.filesystem.isfile(filename):
671
if self.filesystem.isdir(filename):
672
self.respond('550 "%s" is a directory' % (filename,))
674
self.respond('550 "%s" is not a file' % (filename,))
676
self.respond('213 %d'
677
% (self.filesystem.stat(filename)[stat.ST_SIZE]),)
679
def cmd_mkd(self, line):
680
"""Create a directory.
682
Overloaded because default implementation does not distinguish
683
*why* it cannot make a directory.
686
self.command_not_understood(''.join(line))
690
self.filesystem.mkdir (path)
691
self.respond ('257 MKD command successful.')
692
except (IOError, OSError), e:
693
self.respond ('550 error creating directory: %s' % (e,))
695
self.respond ('550 error creating directory.')
698
class ftp_server(medusa.ftp_server.ftp_server):
699
"""Customize the behavior of the Medusa ftp_server.
701
There are a few warts on the ftp_server, based on how it expects
705
ftp_channel_class = ftp_channel
707
def __init__(self, *args, **kwargs):
708
mutter('Initializing _ftp_server: %r, %r', args, kwargs)
709
medusa.ftp_server.ftp_server.__init__(self, *args, **kwargs)
711
def log(self, message):
712
"""Redirect logging requests."""
713
mutter('_ftp_server: %s', message)
715
def log_info(self, message, type='info'):
716
"""Override the asyncore.log_info so we don't stipple the screen."""
717
mutter('_ftp_server %s: %s', type, message)
719
_test_authorizer = test_authorizer
720
_ftp_channel = ftp_channel
721
_ftp_server = ftp_server
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def get_test_permutations():
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"""Return the permutations to be used in testing."""
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from bzrlib.tests import ftp_server
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return [(FtpTransport, ftp_server.FTPTestServer)]
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if not _setup_medusa():
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warn("You must install medusa (http://www.amk.ca/python/code/medusa.html) for FTP tests")
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return [(FtpTransport, FtpServer)]