13
13
# You should have received a copy of the GNU General Public License
14
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17
16
"""Implementation of Transport over ftp.
19
18
Written by Daniel Silverstone <dsilvers@digital-scurf.org> with serious
119
117
: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.
119
The credentials are only the password as it may have been entered
120
interactively by the user and may be different from the one provided
121
in base url at transport creation time.
126
123
if credentials is None:
127
124
user, password = self._user, self._password
131
128
auth = config.AuthenticationConfig()
133
user = auth.get_user('ftp', self._host, port=self._port,
134
default=getpass.getuser())
130
user = auth.get_user('ftp', self._host, port=self._port)
132
# Default to local user
133
user = getpass.getuser()
135
135
mutter("Constructing FTP instance against %r" %
136
136
((self._host, self._port, user, '********',
137
137
self.is_active),))
139
connection = self.connection_class()
139
connection = ftplib.FTP()
140
140
connection.connect(host=self._host, port=self._port)
141
self._login(connection, auth, user, password)
141
if user and user != 'anonymous' and \
142
password is None: # '' is a valid password
143
password = auth.get_password('ftp', self._host, user,
145
connection.login(user=user, passwd=password)
142
146
connection.set_pasv(not self.is_active)
143
# binary mode is the default
144
connection.voidcmd('TYPE I')
145
147
except socket.error, e:
146
148
raise errors.SocketConnectionError(self._host, self._port,
147
149
msg='Unable to connect to',
151
153
" %s" % str(e), orig_error=e)
152
154
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
156
def _reconnect(self):
162
157
"""Create a new connection with the previously used credentials"""
163
158
credentials = self._get_credentials()
164
159
connection, credentials = self._create_connection(credentials)
165
160
self._set_connection(connection, credentials)
167
def _translate_ftp_error(self, err, path, extra=None,
162
def _translate_perm_error(self, err, path, extra=None,
168
163
unknown_exc=FtpPathError):
169
"""Try to translate an ftplib exception to a bzrlib exception.
164
"""Try to translate an ftplib.error_perm exception.
171
166
:param err: The error to translate into a bzr error
172
167
:param path: The path which had problems
189
181
or 'file doesn\'t exist' in s
190
182
or 'rnfr command failed.' in s # vsftpd RNFR reply if file not found
191
183
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
185
raise errors.NoSuchFile(path, extra=extra)
196
elif ('file exists' in s):
186
if ('file exists' in s):
197
187
raise errors.FileExists(path, extra=extra)
198
elif ('not a directory' in s):
188
if ('not a directory' in s):
199
189
raise errors.PathError(path, extra=extra)
200
elif 'directory not empty' in s:
201
raise errors.DirectoryNotEmpty(path, extra=extra)
203
191
mutter('unable to understand error for path: %s: %s', path, err)
206
194
raise unknown_exc(path, extra=extra)
207
# TODO: jam 20060516 Consider re-raising the error wrapped in
195
# TODO: jam 20060516 Consider re-raising the error wrapped in
208
196
# something like TransportError, but this loses the traceback
209
197
# Also, 'sftp' has a generic 'Failure' mode, which we use failure_exc
210
198
# to handle. Consider doing something like that here.
211
199
#raise TransportError(msg='Error for path: %s' % (path,), orig_error=e)
202
def _remote_path(self, relpath):
203
# XXX: It seems that ftplib does not handle Unicode paths
204
# at the same time, medusa won't handle utf8 paths So if
205
# we .encode(utf8) here (see ConnectedTransport
206
# implementation), then we get a Server failure. while
207
# if we use str(), we get a UnicodeError, and the test
208
# suite just skips testing UnicodePaths.
209
relative = str(urlutils.unescape(relpath))
210
remote_path = self._combine_paths(self._path, relative)
214
213
def has(self, relpath):
215
214
"""Does the target location exist?"""
216
215
# FIXME jam 20060516 We *do* ask about directories in the test suite
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
356
def open_write_stream(self, relpath, mode=None):
397
mutter("FTP appe to %s", abspath)
398
self._try_append(relpath, text, mode)
400
self._fallback_append(relpath, text, mode)
392
mutter("FTP appe to %s", abspath)
393
self._try_append(relpath, f.read(), mode)
404
397
def _try_append(self, relpath, text, mode=None, retries=0):
405
398
"""Try repeatedly to append the given text to the file at relpath.
407
400
This is a recursive function. On errors, it will be called until the
408
401
number of retries is exceeded.
411
404
abspath = self._remote_path(relpath)
412
405
mutter("FTP appe (try %d) to %s", retries, abspath)
413
406
ftp = self._get_FTP()
407
ftp.voidcmd("TYPE I")
414
408
cmd = "APPE %s" % abspath
415
409
conn = ftp.transfercmd(cmd)
416
410
conn.sendall(text)
418
self._setmode(relpath, mode)
413
self._setmode(relpath, mode)
420
415
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)
416
self._translate_perm_error(e, abspath, extra='error appending',
417
unknown_exc=errors.NoSuchFile)
430
418
except ftplib.error_temp, e:
431
419
if retries > _number_of_retries:
432
raise errors.TransportError(
433
"FTP temporary error during APPEND %s. Aborting."
434
% abspath, orig_error=e)
420
raise errors.TransportError("FTP temporary error during APPEND %s." \
421
"Aborting." % abspath, orig_error=e)
436
423
warning("FTP temporary error: %s. Retrying.", str(e))
437
424
self._reconnect()
438
425
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
427
def _setmode(self, relpath, mode):
448
428
"""Set permissions on a path.
450
430
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))
434
mutter("FTP site chmod: setting permissions to %s on %s",
435
str(mode), self._remote_path(relpath))
436
ftp = self._get_FTP()
437
cmd = "SITE CHMOD %s %s" % (self._remote_path(relpath), str(mode))
439
except ftplib.error_perm, e:
440
# Command probably not available on this server
441
warning("FTP Could not set permissions to %s on %s. %s",
442
str(mode), self._remote_path(relpath), str(e))
466
444
# TODO: jam 20060516 I believe ftp allows you to tell an ftp server
467
445
# to copy something to another machine. And you may be able
478
456
def _rename(self, abs_from, abs_to, f):
480
458
f.rename(abs_from, abs_to)
481
except (ftplib.error_temp, ftplib.error_perm), e:
482
self._translate_ftp_error(e, abs_from,
459
except ftplib.error_perm, e:
460
self._translate_perm_error(e, abs_from,
483
461
': unable to rename to %r' % (abs_to))
485
463
def move(self, rel_from, rel_to):
491
469
f = self._get_FTP()
492
470
self._rename_and_overwrite(abs_from, abs_to, f)
493
471
except ftplib.error_perm, e:
494
self._translate_ftp_error(e, abs_from,
495
extra='unable to rename to %r' % (rel_to,),
472
self._translate_perm_error(e, abs_from,
473
extra='unable to rename to %r' % (rel_to,),
496
474
unknown_exc=errors.PathError)
498
476
def _rename_and_overwrite(self, abs_from, abs_to, f):
533
511
mutter("FTP nlst: %s", basepath)
534
512
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
514
paths = f.nlst(basepath)
515
except ftplib.error_perm, e:
516
self._translate_perm_error(e, relpath, extra='error with list_dir')
556
517
# If FTP.nlst returns paths prefixed by relpath, strip 'em
557
518
if paths and paths[0].startswith(basepath):
558
519
entries = [path[len(basepath)+1:] for path in paths]
612
573
def get_test_permutations():
613
574
"""Return the permutations to be used in testing."""
614
from bzrlib.tests import ftp_server
615
return [(FtpTransport, ftp_server.FTPTestServer)]
575
from bzrlib import tests
576
if tests.FTPServerFeature.available():
577
from bzrlib.tests import ftp_server
578
return [(FtpTransport, ftp_server.FTPServer)]
580
# Dummy server to have the test suite report the number of tests
581
# needing that feature. We raise UnavailableFeature from methods before
582
# the test server is being used. Doing so in the setUp method has bad
583
# side-effects (tearDown is never called).
584
class UnavailableFTPServer(object):
593
raise tests.UnavailableFeature(tests.FTPServerFeature)
595
def get_bogus_url(self):
596
raise tests.UnavailableFeature(tests.FTPServerFeature)
598
return [(FtpTransport, UnavailableFTPServer)]