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
186
162
or 'could not open' in s
187
163
or 'no such dir' in s
188
164
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
166
raise errors.NoSuchFile(path, extra=extra)
196
elif ('file exists' in s):
167
if ('file exists' in s):
197
168
raise errors.FileExists(path, extra=extra)
198
elif ('not a directory' in s):
169
if ('not a directory' in s):
199
170
raise errors.PathError(path, extra=extra)
200
elif 'directory not empty' in s:
201
raise errors.DirectoryNotEmpty(path, extra=extra)
203
172
mutter('unable to understand error for path: %s: %s', path, err)
206
175
raise unknown_exc(path, extra=extra)
207
# TODO: jam 20060516 Consider re-raising the error wrapped in
176
# TODO: jam 20060516 Consider re-raising the error wrapped in
208
177
# something like TransportError, but this loses the traceback
209
178
# Also, 'sftp' has a generic 'Failure' mode, which we use failure_exc
210
179
# to handle. Consider doing something like that here.
211
180
#raise TransportError(msg='Error for path: %s' % (path,), orig_error=e)
183
def should_cache(self):
184
"""Return True if the data pulled across should be cached locally.
188
def clone(self, offset=None):
189
"""Return a new FtpTransport with root at self.base + offset.
193
return FtpTransport(self.base, self._FTP_instance)
195
return FtpTransport(self.abspath(offset), self._FTP_instance)
197
def _abspath(self, relpath):
198
assert isinstance(relpath, basestring)
199
relpath = urlutils.unescape(relpath)
200
if relpath.startswith('/'):
203
basepath = self._path.split('/')
204
if len(basepath) > 0 and basepath[-1] == '':
205
basepath = basepath[:-1]
206
for p in relpath.split('/'):
208
if len(basepath) == 0:
209
# In most filesystems, a request for the parent
210
# of root, just returns root.
213
elif p == '.' or p == '':
217
# Possibly, we could use urlparse.urljoin() here, but
218
# I'm concerned about when it chooses to strip the last
219
# portion of the path, and when it doesn't.
221
# XXX: It seems that ftplib does not handle Unicode paths
222
# at the same time, medusa won't handle utf8 paths
223
# So if we .encode(utf8) here, then we get a Server failure.
224
# while if we use str(), we get a UnicodeError, and the test suite
225
# just skips testing UnicodePaths.
226
return str('/'.join(basepath) or '/')
228
def abspath(self, relpath):
229
"""Return the full url to the given relative path.
230
This can be supplied with a string or a list
232
path = self._abspath(relpath)
233
return self._unparse_url(path)
214
235
def has(self, relpath):
215
236
"""Does the target location exist?"""
216
237
# FIXME jam 20060516 We *do* ask about directories in the test suite
342
341
warning("FTP control connection closed. Trying to reopen.")
343
342
time.sleep(_sleep_between_retries)
343
self._FTP_instance = None
345
344
self.put_file(relpath, fp, mode, retries+1)
347
346
def mkdir(self, relpath, mode=None):
348
347
"""Create a directory at the given path."""
349
abspath = self._remote_path(relpath)
348
abspath = self._abspath(relpath)
351
350
mutter("FTP mkd: %s", abspath)
352
351
f = self._get_FTP()
354
self._setmode(relpath, mode)
355
353
except ftplib.error_perm, e:
356
self._translate_ftp_error(e, abspath,
354
self._translate_perm_error(e, abspath,
357
355
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
357
def rmdir(self, rel_path):
375
358
"""Delete the directory at rel_path"""
376
abspath = self._remote_path(rel_path)
359
abspath = self._abspath(rel_path)
378
361
mutter("FTP rmd: %s", abspath)
379
362
f = self._get_FTP()
381
364
except ftplib.error_perm, e:
382
self._translate_ftp_error(e, abspath, unknown_exc=errors.PathError)
365
self._translate_perm_error(e, abspath, unknown_exc=errors.PathError)
384
367
def append_file(self, relpath, f, mode=None):
385
368
"""Append the text in the file-like object into the final
389
abspath = self._remote_path(relpath)
371
abspath = self._abspath(relpath)
390
372
if self.has(relpath):
391
373
ftp = self._get_FTP()
392
374
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)
378
mutter("FTP appe to %s", abspath)
379
self._try_append(relpath, f.read(), mode)
404
383
def _try_append(self, relpath, text, mode=None, retries=0):
405
384
"""Try repeatedly to append the given text to the file at relpath.
407
386
This is a recursive function. On errors, it will be called until the
408
387
number of retries is exceeded.
411
abspath = self._remote_path(relpath)
390
abspath = self._abspath(relpath)
412
391
mutter("FTP appe (try %d) to %s", retries, abspath)
413
392
ftp = self._get_FTP()
393
ftp.voidcmd("TYPE I")
414
394
cmd = "APPE %s" % abspath
415
395
conn = ftp.transfercmd(cmd)
416
396
conn.sendall(text)
418
self._setmode(relpath, mode)
399
self._setmode(relpath, mode)
420
401
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)
402
self._translate_perm_error(e, abspath, extra='error appending',
403
unknown_exc=errors.NoSuchFile)
430
404
except ftplib.error_temp, e:
431
405
if retries > _number_of_retries:
432
raise errors.TransportError(
433
"FTP temporary error during APPEND %s. Aborting."
434
% abspath, orig_error=e)
406
raise errors.TransportError("FTP temporary error during APPEND %s." \
407
"Aborting." % abspath, orig_error=e)
436
409
warning("FTP temporary error: %s. Retrying.", str(e))
410
self._FTP_instance = None
438
411
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
413
def _setmode(self, relpath, mode):
448
414
"""Set permissions on a path.
450
416
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))
420
mutter("FTP site chmod: setting permissions to %s on %s",
421
str(mode), self._abspath(relpath))
422
ftp = self._get_FTP()
423
cmd = "SITE CHMOD %s %s" % (self._abspath(relpath), str(mode))
425
except ftplib.error_perm, e:
426
# Command probably not available on this server
427
warning("FTP Could not set permissions to %s on %s. %s",
428
str(mode), self._abspath(relpath), str(e))
466
430
# TODO: jam 20060516 I believe ftp allows you to tell an ftp server
467
431
# to copy something to another machine. And you may be able
468
432
# to give it its own address as the 'to' location.
469
433
# 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
435
def move(self, rel_from, rel_to):
486
436
"""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)
437
abs_from = self._abspath(rel_from)
438
abs_to = self._abspath(rel_to)
490
440
mutter("FTP mv: %s => %s", abs_from, abs_to)
491
441
f = self._get_FTP()
492
self._rename_and_overwrite(abs_from, abs_to, f)
442
f.rename(abs_from, abs_to)
493
443
except ftplib.error_perm, e:
494
self._translate_ftp_error(e, abs_from,
495
extra='unable to rename to %r' % (rel_to,),
444
self._translate_perm_error(e, abs_from,
445
extra='unable to rename to %r' % (rel_to,),
496
446
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
450
def delete(self, relpath):
508
451
"""Delete the item at relpath"""
509
abspath = self._remote_path(relpath)
511
self._delete(abspath, f)
513
def _delete(self, abspath, f):
452
abspath = self._abspath(relpath)
515
454
mutter("FTP rm: %s", abspath)
516
456
f.delete(abspath)
517
457
except ftplib.error_perm, e:
518
self._translate_ftp_error(e, abspath, 'error deleting',
458
self._translate_perm_error(e, abspath, 'error deleting',
519
459
unknown_exc=errors.NoSuchFile)
521
def external_url(self):
522
"""See bzrlib.transport.Transport.external_url."""
523
# FTP URL's are externally usable.
526
461
def listable(self):
527
462
"""See Transport.listable."""
530
465
def list_dir(self, relpath):
531
466
"""See Transport.list_dir."""
532
basepath = self._remote_path(relpath)
467
basepath = self._abspath(relpath)
533
468
mutter("FTP nlst: %s", basepath)
534
469
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
471
paths = f.nlst(basepath)
472
except ftplib.error_perm, e:
473
self._translate_perm_error(e, relpath, extra='error with list_dir')
556
474
# If FTP.nlst returns paths prefixed by relpath, strip 'em
557
475
if paths and paths[0].startswith(basepath):
558
476
entries = [path[len(basepath)+1:] for path in paths]
609
527
return self.lock_read(relpath)
530
class FtpServer(Server):
531
"""Common code for SFTP server facilities."""
535
self._ftp_server = None
537
self._async_thread = None
542
"""Calculate an ftp url to this server."""
543
return 'ftp://foo:bar@localhost:%d/' % (self._port)
545
# def get_bogus_url(self):
546
# """Return a URL which cannot be connected to."""
547
# return 'ftp://127.0.0.1:1'
549
def log(self, message):
550
"""This is used by medusa.ftp_server to log connections, etc."""
551
self.logs.append(message)
556
raise RuntimeError('Must have medusa to run the FtpServer')
558
self._root = os.getcwdu()
559
self._ftp_server = _ftp_server(
560
authorizer=_test_authorizer(root=self._root),
562
port=0, # bind to a random port
564
logger_object=self # Use FtpServer.log() for messages
566
self._port = self._ftp_server.getsockname()[1]
567
# Don't let it loop forever, or handle an infinite number of requests.
568
# In this case it will run for 100s, or 1000 requests
569
self._async_thread = threading.Thread(target=asyncore.loop,
570
kwargs={'timeout':0.1, 'count':1000})
571
self._async_thread.setDaemon(True)
572
self._async_thread.start()
575
"""See bzrlib.transport.Server.tearDown."""
576
# have asyncore release the channel
577
self._ftp_server.del_channel()
579
self._async_thread.join()
584
_test_authorizer = None
588
global _have_medusa, _ftp_channel, _ftp_server, _test_authorizer
591
import medusa.filesys
592
import medusa.ftp_server
598
class test_authorizer(object):
599
"""A custom Authorizer object for running the test suite.
601
The reason we cannot use dummy_authorizer, is because it sets the
602
channel to readonly, which we don't always want to do.
605
def __init__(self, root):
608
def authorize(self, channel, username, password):
609
"""Return (success, reply_string, filesystem)"""
611
return 0, 'No Medusa.', None
613
channel.persona = -1, -1
614
if username == 'anonymous':
615
channel.read_only = 1
617
channel.read_only = 0
619
return 1, 'OK.', medusa.filesys.os_filesystem(self.root)
622
class ftp_channel(medusa.ftp_server.ftp_channel):
623
"""Customized ftp channel"""
625
def log(self, message):
626
"""Redirect logging requests."""
627
mutter('_ftp_channel: %s', message)
629
def log_info(self, message, type='info'):
630
"""Redirect logging requests."""
631
mutter('_ftp_channel %s: %s', type, message)
633
def cmd_rnfr(self, line):
634
"""Prepare for renaming a file."""
635
self._renaming = line[1]
636
self.respond('350 Ready for RNTO')
637
# TODO: jam 20060516 in testing, the ftp server seems to
638
# check that the file already exists, or it sends
639
# 550 RNFR command failed
641
def cmd_rnto(self, line):
642
"""Rename a file based on the target given.
644
rnto must be called after calling rnfr.
646
if not self._renaming:
647
self.respond('503 RNFR required first.')
648
pfrom = self.filesystem.translate(self._renaming)
649
self._renaming = None
650
pto = self.filesystem.translate(line[1])
652
os.rename(pfrom, pto)
653
except (IOError, OSError), e:
654
# TODO: jam 20060516 return custom responses based on
655
# why the command failed
656
self.respond('550 RNTO failed: %s' % (e,))
658
self.respond('550 RNTO failed')
659
# For a test server, we will go ahead and just die
662
self.respond('250 Rename successful.')
664
def cmd_size(self, line):
665
"""Return the size of a file
667
This is overloaded to help the test suite determine if the
668
target is a directory.
671
if not self.filesystem.isfile(filename):
672
if self.filesystem.isdir(filename):
673
self.respond('550 "%s" is a directory' % (filename,))
675
self.respond('550 "%s" is not a file' % (filename,))
677
self.respond('213 %d'
678
% (self.filesystem.stat(filename)[stat.ST_SIZE]),)
680
def cmd_mkd(self, line):
681
"""Create a directory.
683
Overloaded because default implementation does not distinguish
684
*why* it cannot make a directory.
687
self.command_not_understood(''.join(line))
691
self.filesystem.mkdir (path)
692
self.respond ('257 MKD command successful.')
693
except (IOError, OSError), e:
694
self.respond ('550 error creating directory: %s' % (e,))
696
self.respond ('550 error creating directory.')
699
class ftp_server(medusa.ftp_server.ftp_server):
700
"""Customize the behavior of the Medusa ftp_server.
702
There are a few warts on the ftp_server, based on how it expects
706
ftp_channel_class = ftp_channel
708
def __init__(self, *args, **kwargs):
709
mutter('Initializing _ftp_server: %r, %r', args, kwargs)
710
medusa.ftp_server.ftp_server.__init__(self, *args, **kwargs)
712
def log(self, message):
713
"""Redirect logging requests."""
714
mutter('_ftp_server: %s', message)
716
def log_info(self, message, type='info'):
717
"""Override the asyncore.log_info so we don't stipple the screen."""
718
mutter('_ftp_server %s: %s', type, message)
720
_test_authorizer = test_authorizer
721
_ftp_channel = ftp_channel
722
_ftp_server = ftp_server
612
727
def get_test_permutations():
613
728
"""Return the permutations to be used in testing."""
614
from bzrlib.tests import ftp_server
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return [(FtpTransport, ftp_server.FTPTestServer)]
729
if not _setup_medusa():
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warn("You must install medusa (http://www.amk.ca/python/code/medusa.html) for FTP tests")
733
return [(FtpTransport, FtpServer)]