83
92
_number_of_retries = 2
84
93
_sleep_between_retries = 5
86
# FIXME: there are inconsistencies in the way temporary errors are
87
# handled. Sometimes we reconnect, sometimes we raise an exception. Care should
88
# be taken to analyze the implications for write operations (read operations
89
# are safe to retry). Overall even some read operations are never
90
# retried. --vila 20070720 (Bug #127164)
91
class FtpTransport(ConnectedTransport):
95
class FtpTransport(Transport):
92
96
"""This is the transport agent for ftp:// access."""
94
def __init__(self, base, _from_transport=None):
98
def __init__(self, base, _provided_instance=None):
95
99
"""Set the base path where files will be stored."""
96
if not (base.startswith('ftp://') or base.startswith('aftp://')):
97
raise ValueError(base)
98
super(FtpTransport, self).__init__(base,
99
_from_transport=_from_transport)
100
self._unqualified_scheme = 'ftp'
101
if self._parsed_url.scheme == 'aftp':
102
self.is_active = True
104
self.is_active = False
106
# Most modern FTP servers support the APPE command. If ours doesn't, we
107
# (re)set this flag accordingly later.
108
self._has_append = True
100
assert base.startswith('ftp://') or base.startswith('aftp://')
102
self.is_active = base.startswith('aftp://')
104
# urlparse won't handle aftp://
106
if not base.endswith('/'):
108
(self._proto, self._username,
109
self._password, self._host,
110
self._port, self._path) = split_url(base)
111
base = self._unparse_url()
113
super(FtpTransport, self).__init__(base)
114
self._FTP_instance = _provided_instance
116
def _unparse_url(self, path=None):
119
path = urllib.quote(path)
120
netloc = urllib.quote(self._host)
121
if self._username is not None:
122
netloc = '%s@%s' % (urllib.quote(self._username), netloc)
123
if self._port is not None:
124
netloc = '%s:%d' % (netloc, self._port)
125
return urlparse.urlunparse(('ftp', netloc, path, '', '', ''))
110
127
def _get_FTP(self):
111
128
"""Return the ftplib.FTP instance for this object."""
112
# Ensures that a connection is established
113
connection = self._get_connection()
114
if connection is None:
115
# First connection ever
116
connection, credentials = self._create_connection()
117
self._set_connection(connection, credentials)
120
connection_class = ftplib.FTP
122
def _create_connection(self, credentials=None):
123
"""Create a new connection with the provided credentials.
125
:param credentials: The credentials needed to establish the connection.
127
:return: The created connection and its associated credentials.
129
The input credentials are only the password as it may have been
130
entered interactively by the user and may be different from the one
131
provided in base url at transport creation time. The returned
132
credentials are username, password.
134
if credentials is None:
135
user, password = self._user, self._password
137
user, password = credentials
139
auth = config.AuthenticationConfig()
141
user = auth.get_user('ftp', self._host, port=self._port,
142
default=getpass.getuser())
143
mutter("Constructing FTP instance against %r" %
144
((self._host, self._port, user, '********',
129
if self._FTP_instance is not None:
130
return self._FTP_instance
147
connection = self.connection_class()
148
connection.connect(host=self._host, port=self._port)
149
self._login(connection, auth, user, password)
150
connection.set_pasv(not self.is_active)
151
# binary mode is the default
152
connection.voidcmd('TYPE I')
153
except socket.error, e:
154
raise errors.SocketConnectionError(self._host, self._port,
155
msg='Unable to connect to',
133
self._FTP_instance = _find_FTP(self._host, self._port,
134
self._username, self._password,
136
return self._FTP_instance
157
137
except ftplib.error_perm, e:
158
raise errors.TransportError(msg="Error setting up connection:"
159
" %s" % str(e), orig_error=e)
160
return connection, (user, password)
162
def _login(self, connection, auth, user, password):
163
# '' is a valid password
164
if user and user != 'anonymous' and password is None:
165
password = auth.get_password('ftp', self._host,
166
user, port=self._port)
167
connection.login(user=user, passwd=password)
169
def _reconnect(self):
170
"""Create a new connection with the previously used credentials"""
171
credentials = self._get_credentials()
172
connection, credentials = self._create_connection(credentials)
173
self._set_connection(connection, credentials)
175
def disconnect(self):
176
connection = self._get_connection()
177
if connection is not None:
180
def _translate_ftp_error(self, err, path, extra=None,
181
unknown_exc=FtpPathError):
182
"""Try to translate an ftplib exception to a bzrlib exception.
138
raise errors.TransportError(msg="Error setting up connection: %s"
139
% str(e), orig_error=e)
141
def _translate_perm_error(self, err, path, extra=None, unknown_exc=FtpPathError):
142
"""Try to translate an ftplib.error_perm exception.
184
144
:param err: The error to translate into a bzr error
185
145
:param path: The path which had problems
198
155
if ('no such file' in s
199
156
or 'could not open' in s
200
157
or 'no such dir' in s
201
or 'could not create file' in s # vsftpd
202
or 'file doesn\'t exist' in s
203
or 'rnfr command failed.' in s # vsftpd RNFR reply if file not found
204
or 'file/directory not found' in s # filezilla server
205
# Microsoft FTP-Service RNFR reply if file not found
206
or (s.startswith('550 ') and 'unable to rename to' in extra)
207
# if containing directory doesn't exist, suggested by
208
# <https://bugs.launchpad.net/bzr/+bug/224373>
209
or (s.startswith('550 ') and "can't find folder" in s)
211
159
raise errors.NoSuchFile(path, extra=extra)
212
elif ('file exists' in s):
160
if ('file exists' in s):
213
161
raise errors.FileExists(path, extra=extra)
214
elif ('not a directory' in s):
162
if ('not a directory' in s):
215
163
raise errors.PathError(path, extra=extra)
216
elif 'directory not empty' in s:
217
raise errors.DirectoryNotEmpty(path, extra=extra)
219
165
mutter('unable to understand error for path: %s: %s', path, err)
222
168
raise unknown_exc(path, extra=extra)
223
# TODO: jam 20060516 Consider re-raising the error wrapped in
169
# TODO: jam 20060516 Consider re-raising the error wrapped in
224
170
# something like TransportError, but this loses the traceback
225
171
# Also, 'sftp' has a generic 'Failure' mode, which we use failure_exc
226
172
# to handle. Consider doing something like that here.
227
173
#raise TransportError(msg='Error for path: %s' % (path,), orig_error=e)
176
def should_cache(self):
177
"""Return True if the data pulled across should be cached locally.
181
def clone(self, offset=None):
182
"""Return a new FtpTransport with root at self.base + offset.
186
return FtpTransport(self.base, self._FTP_instance)
188
return FtpTransport(self.abspath(offset), self._FTP_instance)
190
def _abspath(self, relpath):
191
assert isinstance(relpath, basestring)
192
relpath = urllib.unquote(relpath)
193
relpath_parts = relpath.split('/')
194
if len(relpath_parts) > 1:
195
if relpath_parts[0] == '':
196
raise ValueError("path %r within branch %r seems to be absolute"
197
% (relpath, self._path))
198
basepath = self._path.split('/')
199
if len(basepath) > 0 and basepath[-1] == '':
200
basepath = basepath[:-1]
201
for p in relpath_parts:
203
if len(basepath) == 0:
204
# In most filesystems, a request for the parent
205
# of root, just returns root.
208
elif p == '.' or p == '':
212
# Possibly, we could use urlparse.urljoin() here, but
213
# I'm concerned about when it chooses to strip the last
214
# portion of the path, and when it doesn't.
215
return '/'.join(basepath) or '/'
217
def abspath(self, relpath):
218
"""Return the full url to the given relative path.
219
This can be supplied with a string or a list
221
path = self._abspath(relpath)
222
return self._unparse_url(path)
230
224
def has(self, relpath):
231
225
"""Does the target location exist?"""
232
226
# FIXME jam 20060516 We *do* ask about directories in the test suite
363
330
warning("FTP control connection closed. Trying to reopen.")
364
331
time.sleep(_sleep_between_retries)
366
self.put_file(relpath, fp, mode, retries+1)
332
self._FTP_instance = None
333
self.put(relpath, fp, mode, retries+1)
368
335
def mkdir(self, relpath, mode=None):
369
336
"""Create a directory at the given path."""
370
abspath = self._remote_path(relpath)
337
abspath = self._abspath(relpath)
372
339
mutter("FTP mkd: %s", abspath)
373
340
f = self._get_FTP()
376
except ftplib.error_reply, e:
377
# <https://bugs.launchpad.net/bzr/+bug/224373> Microsoft FTP
378
# server returns "250 Directory created." which is kind of
379
# reasonable, 250 meaning "requested file action OK", but not what
380
# Python's ftplib expects.
381
if e[0][:3] == '250':
385
self._setmode(relpath, mode)
386
342
except ftplib.error_perm, e:
387
self._translate_ftp_error(e, abspath,
343
self._translate_perm_error(e, abspath,
388
344
unknown_exc=errors.FileExists)
390
def open_write_stream(self, relpath, mode=None):
391
"""See Transport.open_write_stream."""
392
self.put_bytes(relpath, "", mode)
393
result = AppendBasedFileStream(self, relpath)
394
_file_streams[self.abspath(relpath)] = result
397
def recommended_page_size(self):
398
"""See Transport.recommended_page_size().
400
For FTP we suggest a large page size to reduce the overhead
401
introduced by latency.
405
346
def rmdir(self, rel_path):
406
347
"""Delete the directory at rel_path"""
407
abspath = self._remote_path(rel_path)
348
abspath = self._abspath(rel_path)
409
350
mutter("FTP rmd: %s", abspath)
410
351
f = self._get_FTP()
412
353
except ftplib.error_perm, e:
413
self._translate_ftp_error(e, abspath, unknown_exc=errors.PathError)
354
self._translate_perm_error(e, abspath, unknown_exc=errors.PathError)
415
def append_file(self, relpath, f, mode=None):
356
def append(self, relpath, f, mode=None):
416
357
"""Append the text in the file-like object into the final
420
abspath = self._remote_path(relpath)
360
abspath = self._abspath(relpath)
421
361
if self.has(relpath):
422
362
ftp = self._get_FTP()
423
363
result = ftp.size(abspath)
428
mutter("FTP appe to %s", abspath)
429
self._try_append(relpath, text, mode)
431
self._fallback_append(relpath, text, mode)
367
mutter("FTP appe to %s", abspath)
368
self._try_append(relpath, f.read(), mode)
435
372
def _try_append(self, relpath, text, mode=None, retries=0):
436
373
"""Try repeatedly to append the given text to the file at relpath.
438
375
This is a recursive function. On errors, it will be called until the
439
376
number of retries is exceeded.
442
abspath = self._remote_path(relpath)
379
abspath = self._abspath(relpath)
443
380
mutter("FTP appe (try %d) to %s", retries, abspath)
444
381
ftp = self._get_FTP()
382
ftp.voidcmd("TYPE I")
445
383
cmd = "APPE %s" % abspath
446
384
conn = ftp.transfercmd(cmd)
447
385
conn.sendall(text)
449
self._setmode(relpath, mode)
388
self._setmode(relpath, mode)
451
390
except ftplib.error_perm, e:
452
# Check whether the command is not supported (reply code 502)
453
if str(e).startswith('502 '):
454
warning("FTP server does not support file appending natively. "
455
"Performance may be severely degraded! (%s)", e)
456
self._has_append = False
457
self._fallback_append(relpath, text, mode)
459
self._translate_ftp_error(e, abspath, extra='error appending',
460
unknown_exc=errors.NoSuchFile)
391
self._translate_perm_error(e, abspath, extra='error appending',
392
unknown_exc=errors.NoSuchFile)
461
393
except ftplib.error_temp, e:
462
394
if retries > _number_of_retries:
463
raise errors.TransportError(
464
"FTP temporary error during APPEND %s. Aborting."
465
% abspath, orig_error=e)
395
raise errors.TransportError("FTP temporary error during APPEND %s." \
396
"Aborting." % abspath, orig_error=e)
467
398
warning("FTP temporary error: %s. Retrying.", str(e))
399
self._FTP_instance = None
469
400
self._try_append(relpath, text, mode, retries+1)
471
def _fallback_append(self, relpath, text, mode = None):
472
remote = self.get(relpath)
473
remote.seek(0, os.SEEK_END)
476
return self.put_file(relpath, remote, mode)
478
402
def _setmode(self, relpath, mode):
479
403
"""Set permissions on a path.
481
405
Only set permissions if the FTP server supports the 'SITE CHMOD'
486
mutter("FTP site chmod: setting permissions to %s on %s",
487
oct(mode), self._remote_path(relpath))
488
ftp = self._get_FTP()
489
cmd = "SITE CHMOD %s %s" % (oct(mode),
490
self._remote_path(relpath))
492
except ftplib.error_perm, e:
493
# Command probably not available on this server
494
warning("FTP Could not set permissions to %s on %s. %s",
495
oct(mode), self._remote_path(relpath), str(e))
409
mutter("FTP site chmod: setting permissions to %s on %s",
410
str(mode), self._abspath(relpath))
411
ftp = self._get_FTP()
412
cmd = "SITE CHMOD %s %s" % (self._abspath(relpath), str(mode))
414
except ftplib.error_perm, e:
415
# Command probably not available on this server
416
warning("FTP Could not set permissions to %s on %s. %s",
417
str(mode), self._abspath(relpath), str(e))
497
419
# TODO: jam 20060516 I believe ftp allows you to tell an ftp server
498
420
# to copy something to another machine. And you may be able
499
421
# to give it its own address as the 'to' location.
500
422
# So implement a fancier 'copy()'
502
def rename(self, rel_from, rel_to):
503
abs_from = self._remote_path(rel_from)
504
abs_to = self._remote_path(rel_to)
505
mutter("FTP rename: %s => %s", abs_from, abs_to)
507
return self._rename(abs_from, abs_to, f)
509
def _rename(self, abs_from, abs_to, f):
511
f.rename(abs_from, abs_to)
512
except (ftplib.error_temp, ftplib.error_perm), e:
513
self._translate_ftp_error(e, abs_from,
514
': unable to rename to %r' % (abs_to))
516
424
def move(self, rel_from, rel_to):
517
425
"""Move the item at rel_from to the location at rel_to"""
518
abs_from = self._remote_path(rel_from)
519
abs_to = self._remote_path(rel_to)
426
abs_from = self._abspath(rel_from)
427
abs_to = self._abspath(rel_to)
521
429
mutter("FTP mv: %s => %s", abs_from, abs_to)
522
430
f = self._get_FTP()
523
self._rename_and_overwrite(abs_from, abs_to, f)
431
f.rename(abs_from, abs_to)
524
432
except ftplib.error_perm, e:
525
self._translate_ftp_error(e, abs_from,
526
extra='unable to rename to %r' % (rel_to,),
433
self._translate_perm_error(e, abs_from,
434
extra='unable to rename to %r' % (rel_to,),
527
435
unknown_exc=errors.PathError)
529
def _rename_and_overwrite(self, abs_from, abs_to, f):
530
"""Do a fancy rename on the remote server.
532
Using the implementation provided by osutils.
534
osutils.fancy_rename(abs_from, abs_to,
535
rename_func=lambda p1, p2: self._rename(p1, p2, f),
536
unlink_func=lambda p: self._delete(p, f))
538
439
def delete(self, relpath):
539
440
"""Delete the item at relpath"""
540
abspath = self._remote_path(relpath)
542
self._delete(abspath, f)
544
def _delete(self, abspath, f):
441
abspath = self._abspath(relpath)
546
443
mutter("FTP rm: %s", abspath)
547
445
f.delete(abspath)
548
446
except ftplib.error_perm, e:
549
self._translate_ftp_error(e, abspath, 'error deleting',
447
self._translate_perm_error(e, abspath, 'error deleting',
550
448
unknown_exc=errors.NoSuchFile)
552
def external_url(self):
553
"""See bzrlib.transport.Transport.external_url."""
554
# FTP URL's are externally usable.
557
450
def listable(self):
558
451
"""See Transport.listable."""
561
454
def list_dir(self, relpath):
562
455
"""See Transport.list_dir."""
563
basepath = self._remote_path(relpath)
564
mutter("FTP nlst: %s", basepath)
568
paths = f.nlst(basepath)
569
except ftplib.error_perm, e:
570
self._translate_ftp_error(e, relpath,
571
extra='error with list_dir')
572
except ftplib.error_temp, e:
573
# xs4all's ftp server raises a 450 temp error when listing an
574
# empty directory. Check for that and just return an empty list
575
# in that case. See bug #215522
576
if str(e).lower().startswith('450 no files found'):
577
mutter('FTP Server returned "%s" for nlst.'
578
' Assuming it means empty directory',
583
# Restore binary mode as nlst switch to ascii mode to retrieve file
587
# If FTP.nlst returns paths prefixed by relpath, strip 'em
588
if paths and paths[0].startswith(basepath):
589
entries = [path[len(basepath)+1:] for path in paths]
592
# Remove . and .. if present
593
return [urlutils.escape(entry) for entry in entries
594
if entry not in ('.', '..')]
457
mutter("FTP nlst: %s", self._abspath(relpath))
459
basepath = self._abspath(relpath)
460
paths = f.nlst(basepath)
461
# If FTP.nlst returns paths prefixed by relpath, strip 'em
462
if paths and paths[0].startswith(basepath):
463
paths = [path[len(basepath)+1:] for path in paths]
464
# Remove . and .. if present, and return
465
return [path for path in paths if path not in (".", "..")]
466
except ftplib.error_perm, e:
467
self._translate_perm_error(e, relpath, extra='error with list_dir')
596
469
def iter_files_recursive(self):
597
470
"""See Transport.iter_files_recursive.
640
513
return self.lock_read(relpath)
516
class FtpServer(Server):
517
"""Common code for SFTP server facilities."""
521
self._ftp_server = None
523
self._async_thread = None
528
"""Calculate an ftp url to this server."""
529
return 'ftp://foo:bar@localhost:%d/' % (self._port)
531
# def get_bogus_url(self):
532
# """Return a URL which cannot be connected to."""
533
# return 'ftp://127.0.0.1:1'
535
def log(self, message):
536
"""This is used by medusa.ftp_server to log connections, etc."""
537
self.logs.append(message)
542
raise RuntimeError('Must have medusa to run the FtpServer')
544
self._root = os.getcwdu()
545
self._ftp_server = _ftp_server(
546
authorizer=_test_authorizer(root=self._root),
548
port=0, # bind to a random port
550
logger_object=self # Use FtpServer.log() for messages
552
self._port = self._ftp_server.getsockname()[1]
553
# Don't let it loop forever, or handle an infinite number of requests.
554
# In this case it will run for 100s, or 1000 requests
555
self._async_thread = threading.Thread(target=asyncore.loop,
556
kwargs={'timeout':0.1, 'count':1000})
557
self._async_thread.setDaemon(True)
558
self._async_thread.start()
561
"""See bzrlib.transport.Server.tearDown."""
562
# have asyncore release the channel
563
self._ftp_server.del_channel()
565
self._async_thread.join()
570
_test_authorizer = None
574
global _have_medusa, _ftp_channel, _ftp_server, _test_authorizer
577
import medusa.filesys
578
import medusa.ftp_server
584
class test_authorizer(object):
585
"""A custom Authorizer object for running the test suite.
587
The reason we cannot use dummy_authorizer, is because it sets the
588
channel to readonly, which we don't always want to do.
591
def __init__(self, root):
594
def authorize(self, channel, username, password):
595
"""Return (success, reply_string, filesystem)"""
597
return 0, 'No Medusa.', None
599
channel.persona = -1, -1
600
if username == 'anonymous':
601
channel.read_only = 1
603
channel.read_only = 0
605
return 1, 'OK.', medusa.filesys.os_filesystem(self.root)
608
class ftp_channel(medusa.ftp_server.ftp_channel):
609
"""Customized ftp channel"""
611
def log(self, message):
612
"""Redirect logging requests."""
613
mutter('_ftp_channel: %s', message)
615
def log_info(self, message, type='info'):
616
"""Redirect logging requests."""
617
mutter('_ftp_channel %s: %s', type, message)
619
def cmd_rnfr(self, line):
620
"""Prepare for renaming a file."""
621
self._renaming = line[1]
622
self.respond('350 Ready for RNTO')
623
# TODO: jam 20060516 in testing, the ftp server seems to
624
# check that the file already exists, or it sends
625
# 550 RNFR command failed
627
def cmd_rnto(self, line):
628
"""Rename a file based on the target given.
630
rnto must be called after calling rnfr.
632
if not self._renaming:
633
self.respond('503 RNFR required first.')
634
pfrom = self.filesystem.translate(self._renaming)
635
self._renaming = None
636
pto = self.filesystem.translate(line[1])
638
os.rename(pfrom, pto)
639
except (IOError, OSError), e:
640
# TODO: jam 20060516 return custom responses based on
641
# why the command failed
642
self.respond('550 RNTO failed: %s' % (e,))
644
self.respond('550 RNTO failed')
645
# For a test server, we will go ahead and just die
648
self.respond('250 Rename successful.')
650
def cmd_size(self, line):
651
"""Return the size of a file
653
This is overloaded to help the test suite determine if the
654
target is a directory.
657
if not self.filesystem.isfile(filename):
658
if self.filesystem.isdir(filename):
659
self.respond('550 "%s" is a directory' % (filename,))
661
self.respond('550 "%s" is not a file' % (filename,))
663
self.respond('213 %d'
664
% (self.filesystem.stat(filename)[stat.ST_SIZE]),)
666
def cmd_mkd(self, line):
667
"""Create a directory.
669
Overloaded because default implementation does not distinguish
670
*why* it cannot make a directory.
673
self.command_not_understood(''.join(line))
677
self.filesystem.mkdir (path)
678
self.respond ('257 MKD command successful.')
679
except (IOError, OSError), e:
680
self.respond ('550 error creating directory: %s' % (e,))
682
self.respond ('550 error creating directory.')
685
class ftp_server(medusa.ftp_server.ftp_server):
686
"""Customize the behavior of the Medusa ftp_server.
688
There are a few warts on the ftp_server, based on how it expects
692
ftp_channel_class = ftp_channel
694
def __init__(self, *args, **kwargs):
695
mutter('Initializing _ftp_server: %r, %r', args, kwargs)
696
medusa.ftp_server.ftp_server.__init__(self, *args, **kwargs)
698
def log(self, message):
699
"""Redirect logging requests."""
700
mutter('_ftp_server: %s', message)
702
def log_info(self, message, type='info'):
703
"""Override the asyncore.log_info so we don't stipple the screen."""
704
mutter('_ftp_server %s: %s', type, message)
706
_test_authorizer = test_authorizer
707
_ftp_channel = ftp_channel
708
_ftp_server = ftp_server
643
713
def get_test_permutations():
644
714
"""Return the permutations to be used in testing."""
645
from bzrlib.tests import ftp_server
646
return [(FtpTransport, ftp_server.FTPTestServer)]
715
if not _setup_medusa():
716
warn("You must install medusa (http://www.amk.ca/python/code/medusa.html) for FTP tests")
719
return [(FtpTransport, FtpServer)]