27
27
from cStringIO import StringIO
38
from warnings import warn
42
from bzrlib.trace import mutter, warning
43
40
from bzrlib.transport import (
44
AppendBasedFileStream,
47
register_urlparse_netloc_protocol,
52
register_urlparse_netloc_protocol('aftp')
45
import bzrlib.errors as errors
46
from bzrlib.trace import mutter, warning
55
52
class FtpPathError(errors.PathError):
56
53
"""FTP failed for path: %(path)s%(extra)s"""
57
def _find_FTP(hostname, port, username, password, is_active):
58
"""Find an ftplib.FTP instance attached to this triplet."""
59
key = (hostname, port, username, password, is_active)
60
alt_key = (hostname, port, username, '********', is_active)
61
if key not in _FTP_cache:
62
mutter("Constructing FTP instance against %r" % (alt_key,))
65
conn.connect(host=hostname, port=port)
66
if username and username != 'anonymous' and not password:
67
password = bzrlib.ui.ui_factory.get_password(
68
prompt='FTP %(user)s@%(host)s password',
69
user=username, host=hostname)
70
conn.login(user=username, passwd=password)
71
conn.set_pasv(not is_active)
73
_FTP_cache[key] = conn
75
return _FTP_cache[key]
59
78
class FtpStatResult(object):
61
def __init__(self, f, abspath):
79
def __init__(self, f, relpath):
63
self.st_size = f.size(abspath)
81
self.st_size = f.size(relpath)
64
82
self.st_mode = stat.S_IFREG
65
83
except ftplib.error_perm:
69
87
self.st_mode = stat.S_IFDIR
74
92
_number_of_retries = 2
75
93
_sleep_between_retries = 5
77
# FIXME: there are inconsistencies in the way temporary errors are
78
# handled. Sometimes we reconnect, sometimes we raise an exception. Care should
79
# be taken to analyze the implications for write operations (read operations
80
# are safe to retry). Overall even some read operations are never
81
# retried. --vila 20070720 (Bug #127164)
82
class FtpTransport(ConnectedTransport):
95
class FtpTransport(Transport):
83
96
"""This is the transport agent for ftp:// access."""
85
def __init__(self, base, _from_transport=None):
98
def __init__(self, base, _provided_instance=None):
86
99
"""Set the base path where files will be stored."""
87
if not (base.startswith('ftp://') or base.startswith('aftp://')):
88
raise ValueError(base)
89
super(FtpTransport, self).__init__(base,
90
_from_transport=_from_transport)
91
self._unqualified_scheme = 'ftp'
92
if self._scheme == 'aftp':
95
self.is_active = False
97
# Most modern FTP servers support the APPE command. If ours doesn't, we
98
# (re)set this flag accordingly later.
99
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, '', '', ''))
101
127
def _get_FTP(self):
102
128
"""Return the ftplib.FTP instance for this object."""
103
# Ensures that a connection is established
104
connection = self._get_connection()
105
if connection is None:
106
# First connection ever
107
connection, credentials = self._create_connection()
108
self._set_connection(connection, credentials)
111
connection_class = ftplib.FTP
113
def _create_connection(self, credentials=None):
114
"""Create a new connection with the provided credentials.
116
:param credentials: The credentials needed to establish the connection.
118
:return: The created connection and its associated credentials.
120
The input credentials are only the password as it may have been
121
entered interactively by the user and may be different from the one
122
provided in base url at transport creation time. The returned
123
credentials are username, password.
125
if credentials is None:
126
user, password = self._user, self._password
128
user, password = credentials
130
auth = config.AuthenticationConfig()
132
user = auth.get_user('ftp', self._host, port=self._port,
133
default=getpass.getuser())
134
mutter("Constructing FTP instance against %r" %
135
((self._host, self._port, user, '********',
129
if self._FTP_instance is not None:
130
return self._FTP_instance
138
connection = self.connection_class()
139
connection.connect(host=self._host, port=self._port)
140
self._login(connection, auth, user, password)
141
connection.set_pasv(not self.is_active)
142
# binary mode is the default
143
connection.voidcmd('TYPE I')
144
except socket.error, e:
145
raise errors.SocketConnectionError(self._host, self._port,
146
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
148
137
except ftplib.error_perm, e:
149
raise errors.TransportError(msg="Error setting up connection:"
150
" %s" % str(e), orig_error=e)
151
return connection, (user, password)
153
def _login(self, connection, auth, user, password):
154
# '' is a valid password
155
if user and user != 'anonymous' and password is None:
156
password = auth.get_password('ftp', self._host,
157
user, port=self._port)
158
connection.login(user=user, passwd=password)
160
def _reconnect(self):
161
"""Create a new connection with the previously used credentials"""
162
credentials = self._get_credentials()
163
connection, credentials = self._create_connection(credentials)
164
self._set_connection(connection, credentials)
166
def _translate_perm_error(self, err, path, extra=None,
167
unknown_exc=FtpPathError):
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):
168
142
"""Try to translate an ftplib.error_perm exception.
170
144
:param err: The error to translate into a bzr error
200
168
raise unknown_exc(path, extra=extra)
201
# TODO: jam 20060516 Consider re-raising the error wrapped in
169
# TODO: jam 20060516 Consider re-raising the error wrapped in
202
170
# something like TransportError, but this loses the traceback
203
171
# Also, 'sftp' has a generic 'Failure' mode, which we use failure_exc
204
172
# to handle. Consider doing something like that here.
205
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)
208
224
def has(self, relpath):
209
225
"""Does the target location exist?"""
210
226
# FIXME jam 20060516 We *do* ask about directories in the test suite
375
353
except ftplib.error_perm, e:
376
354
self._translate_perm_error(e, abspath, unknown_exc=errors.PathError)
378
def append_file(self, relpath, f, mode=None):
356
def append(self, relpath, f, mode=None):
379
357
"""Append the text in the file-like object into the final
383
abspath = self._remote_path(relpath)
360
abspath = self._abspath(relpath)
384
361
if self.has(relpath):
385
362
ftp = self._get_FTP()
386
363
result = ftp.size(abspath)
391
mutter("FTP appe to %s", abspath)
392
self._try_append(relpath, text, mode)
394
self._fallback_append(relpath, text, mode)
367
mutter("FTP appe to %s", abspath)
368
self._try_append(relpath, f.read(), mode)
398
372
def _try_append(self, relpath, text, mode=None, retries=0):
399
373
"""Try repeatedly to append the given text to the file at relpath.
401
375
This is a recursive function. On errors, it will be called until the
402
376
number of retries is exceeded.
405
abspath = self._remote_path(relpath)
379
abspath = self._abspath(relpath)
406
380
mutter("FTP appe (try %d) to %s", retries, abspath)
407
381
ftp = self._get_FTP()
382
ftp.voidcmd("TYPE I")
408
383
cmd = "APPE %s" % abspath
409
384
conn = ftp.transfercmd(cmd)
410
385
conn.sendall(text)
412
self._setmode(relpath, mode)
388
self._setmode(relpath, mode)
414
390
except ftplib.error_perm, e:
415
# Check whether the command is not supported (reply code 502)
416
if str(e).startswith('502 '):
417
warning("FTP server does not support file appending natively. "
418
"Performance may be severely degraded! (%s)", e)
419
self._has_append = False
420
self._fallback_append(relpath, text, mode)
422
self._translate_perm_error(e, abspath, extra='error appending',
423
unknown_exc=errors.NoSuchFile)
391
self._translate_perm_error(e, abspath, extra='error appending',
392
unknown_exc=errors.NoSuchFile)
424
393
except ftplib.error_temp, e:
425
394
if retries > _number_of_retries:
426
raise errors.TransportError(
427
"FTP temporary error during APPEND %s. Aborting."
428
% abspath, orig_error=e)
395
raise errors.TransportError("FTP temporary error during APPEND %s." \
396
"Aborting." % abspath, orig_error=e)
430
398
warning("FTP temporary error: %s. Retrying.", str(e))
399
self._FTP_instance = None
432
400
self._try_append(relpath, text, mode, retries+1)
434
def _fallback_append(self, relpath, text, mode = None):
435
remote = self.get(relpath)
436
remote.seek(0, os.SEEK_END)
439
return self.put_file(relpath, remote, mode)
441
402
def _setmode(self, relpath, mode):
442
403
"""Set permissions on a path.
444
405
Only set permissions if the FTP server supports the 'SITE CHMOD'
449
mutter("FTP site chmod: setting permissions to %s on %s",
450
oct(mode), self._remote_path(relpath))
451
ftp = self._get_FTP()
452
cmd = "SITE CHMOD %s %s" % (oct(mode),
453
self._remote_path(relpath))
455
except ftplib.error_perm, e:
456
# Command probably not available on this server
457
warning("FTP Could not set permissions to %s on %s. %s",
458
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))
460
419
# TODO: jam 20060516 I believe ftp allows you to tell an ftp server
461
420
# to copy something to another machine. And you may be able
462
421
# to give it its own address as the 'to' location.
463
422
# So implement a fancier 'copy()'
465
def rename(self, rel_from, rel_to):
466
abs_from = self._remote_path(rel_from)
467
abs_to = self._remote_path(rel_to)
468
mutter("FTP rename: %s => %s", abs_from, abs_to)
470
return self._rename(abs_from, abs_to, f)
472
def _rename(self, abs_from, abs_to, f):
474
f.rename(abs_from, abs_to)
475
except ftplib.error_perm, e:
476
self._translate_perm_error(e, abs_from,
477
': unable to rename to %r' % (abs_to))
479
424
def move(self, rel_from, rel_to):
480
425
"""Move the item at rel_from to the location at rel_to"""
481
abs_from = self._remote_path(rel_from)
482
abs_to = self._remote_path(rel_to)
426
abs_from = self._abspath(rel_from)
427
abs_to = self._abspath(rel_to)
484
429
mutter("FTP mv: %s => %s", abs_from, abs_to)
485
430
f = self._get_FTP()
486
self._rename_and_overwrite(abs_from, abs_to, f)
431
f.rename(abs_from, abs_to)
487
432
except ftplib.error_perm, e:
488
433
self._translate_perm_error(e, abs_from,
489
extra='unable to rename to %r' % (rel_to,),
434
extra='unable to rename to %r' % (rel_to,),
490
435
unknown_exc=errors.PathError)
492
def _rename_and_overwrite(self, abs_from, abs_to, f):
493
"""Do a fancy rename on the remote server.
495
Using the implementation provided by osutils.
497
osutils.fancy_rename(abs_from, abs_to,
498
rename_func=lambda p1, p2: self._rename(p1, p2, f),
499
unlink_func=lambda p: self._delete(p, f))
501
439
def delete(self, relpath):
502
440
"""Delete the item at relpath"""
503
abspath = self._remote_path(relpath)
505
self._delete(abspath, f)
507
def _delete(self, abspath, f):
441
abspath = self._abspath(relpath)
509
443
mutter("FTP rm: %s", abspath)
510
445
f.delete(abspath)
511
446
except ftplib.error_perm, e:
512
447
self._translate_perm_error(e, abspath, 'error deleting',
513
448
unknown_exc=errors.NoSuchFile)
515
def external_url(self):
516
"""See bzrlib.transport.Transport.external_url."""
517
# FTP URL's are externally usable.
520
450
def listable(self):
521
451
"""See Transport.listable."""
524
454
def list_dir(self, relpath):
525
455
"""See Transport.list_dir."""
526
basepath = self._remote_path(relpath)
527
mutter("FTP nlst: %s", basepath)
531
paths = f.nlst(basepath)
532
except ftplib.error_perm, e:
533
self._translate_perm_error(e, relpath,
534
extra='error with list_dir')
535
except ftplib.error_temp, e:
536
# xs4all's ftp server raises a 450 temp error when listing an
537
# empty directory. Check for that and just return an empty list
538
# in that case. See bug #215522
539
if str(e).lower().startswith('450 no files found'):
540
mutter('FTP Server returned "%s" for nlst.'
541
' Assuming it means empty directory',
546
# Restore binary mode as nlst switch to ascii mode to retrieve file
550
# If FTP.nlst returns paths prefixed by relpath, strip 'em
551
if paths and paths[0].startswith(basepath):
552
entries = [path[len(basepath)+1:] for path in paths]
555
# Remove . and .. if present
556
return [urlutils.escape(entry) for entry in entries
557
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')
559
469
def iter_files_recursive(self):
560
470
"""See Transport.iter_files_recursive.
603
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
606
713
def get_test_permutations():
607
714
"""Return the permutations to be used in testing."""
608
from bzrlib.tests import ftp_server
609
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)]