131
122
# What specific errors should we catch here?
135
class _SFTPReadvHelper(object):
136
"""A class to help with managing the state of a readv request."""
138
# See _get_requests for an explanation.
139
_max_request_size = 32768
141
def __init__(self, original_offsets, relpath, _report_activity):
142
"""Create a new readv helper.
144
:param original_offsets: The original requests given by the caller of
146
:param relpath: The name of the file (if known)
147
:param _report_activity: A Transport._report_activity bound method,
148
to be called as data arrives.
150
self.original_offsets = list(original_offsets)
151
self.relpath = relpath
152
self._report_activity = _report_activity
154
def _get_requests(self):
155
"""Break up the offsets into individual requests over sftp.
157
The SFTP spec only requires implementers to support 32kB requests. We
158
could try something larger (openssh supports 64kB), but then we have to
159
handle requests that fail.
160
So instead, we just break up our maximum chunks into 32kB chunks, and
161
asyncronously requests them.
162
Newer versions of paramiko would do the chunking for us, but we want to
163
start processing results right away, so we do it ourselves.
165
# TODO: Because we issue async requests, we don't 'fudge' any extra
166
# data. I'm not 100% sure that is the best choice.
168
# The first thing we do, is to collapse the individual requests as much
169
# as possible, so we don't issues requests <32kB
170
sorted_offsets = sorted(self.original_offsets)
171
coalesced = list(ConnectedTransport._coalesce_offsets(sorted_offsets,
172
limit=0, fudge_factor=0))
174
for c_offset in coalesced:
175
start = c_offset.start
176
size = c_offset.length
178
# Break this up into 32kB requests
180
next_size = min(size, self._max_request_size)
181
requests.append((start, next_size))
184
if 'sftp' in debug.debug_flags:
185
mutter('SFTP.readv(%s) %s offsets => %s coalesced => %s requests',
186
self.relpath, len(sorted_offsets), len(coalesced),
190
def request_and_yield_offsets(self, fp):
191
"""Request the data from the remote machine, yielding the results.
193
:param fp: A Paramiko SFTPFile object that supports readv.
194
:return: Yield the data requested by the original readv caller, one by
197
requests = self._get_requests()
198
offset_iter = iter(self.original_offsets)
199
cur_offset, cur_size = offset_iter.next()
200
# paramiko .readv() yields strings that are in the order of the requests
201
# So we track the current request to know where the next data is
202
# being returned from.
208
# This is used to buffer chunks which we couldn't process yet
209
# It is (start, end, data) tuples.
211
# Create an 'unlimited' data stream, so we stop based on requests,
212
# rather than just because the data stream ended. This lets us detect
214
data_stream = itertools.chain(fp.readv(requests),
215
itertools.repeat(None))
216
for (start, length), data in itertools.izip(requests, data_stream):
218
if cur_coalesced is not None:
219
raise errors.ShortReadvError(self.relpath,
220
start, length, len(data))
221
if len(data) != length:
222
raise errors.ShortReadvError(self.relpath,
223
start, length, len(data))
224
self._report_activity(length, 'read')
226
# This is the first request, just buffer it
227
buffered_data = [data]
228
buffered_len = length
230
elif start == last_end:
231
# The data we are reading fits neatly on the previous
232
# buffer, so this is all part of a larger coalesced range.
233
buffered_data.append(data)
234
buffered_len += length
125
class SFTPTransport (Transport):
127
Transport implementation for SFTP access.
130
_url_matcher = re.compile(r'^sftp://([^:@]*(:[^@]*)?@)?(.*?)(:[^/]+)?(/.*)?$')
132
def __init__(self, base, clone_from=None):
133
assert base.startswith('sftp://')
134
super(SFTPTransport, self).__init__(base)
135
self._parse_url(base)
136
if clone_from is None:
139
# use the same ssh connection, etc
140
self._sftp = clone_from._sftp
141
# super saves 'self.base'
143
def should_cache(self):
145
Return True if the data pulled across should be cached locally.
149
def clone(self, offset=None):
151
Return a new SFTPTransport with root at self.base + offset.
152
We share the same SFTP session between such transports, because it's
153
fairly expensive to set them up.
156
return SFTPTransport(self.base, self)
158
return SFTPTransport(self.abspath(offset), self)
160
def abspath(self, relpath):
162
Return the full url to the given relative path.
164
@param relpath: the relative path or path components
165
@type relpath: str or list
167
return self._unparse_url(self._abspath(relpath))
169
def _abspath(self, relpath):
170
"""Return the absolute path segment without the SFTP URL."""
171
# FIXME: share the common code across transports
172
assert isinstance(relpath, basestring)
173
relpath = [urllib.unquote(relpath)]
174
basepath = self._path.split('/')
175
if len(basepath) > 0 and basepath[-1] == '':
176
basepath = basepath[:-1]
180
if len(basepath) == 0:
181
# In most filesystems, a request for the parent
182
# of root, just returns root.
236
# We have an 'interrupt' in the data stream. So we know we are
237
# at a request boundary.
239
# We haven't consumed the buffer so far, so put it into
240
# data_chunks, and continue.
241
buffered = ''.join(buffered_data)
242
data_chunks.append((input_start, buffered))
244
buffered_data = [data]
245
buffered_len = length
246
last_end = start + length
247
if input_start == cur_offset and cur_size <= buffered_len:
248
# Simplify the next steps a bit by transforming buffered_data
249
# into a single string. We also have the nice property that
250
# when there is only one string ''.join([x]) == x, so there is
252
buffered = ''.join(buffered_data)
253
# Clean out buffered data so that we keep memory
257
# TODO: We *could* also consider the case where cur_offset is in
258
# in the buffered range, even though it doesn't *start*
259
# the buffered range. But for packs we pretty much always
260
# read in order, so you won't get any extra data in the
262
while (input_start == cur_offset
263
and (buffered_offset + cur_size) <= buffered_len):
264
# We've buffered enough data to process this request, spit it
266
cur_data = buffered[buffered_offset:buffered_offset + cur_size]
267
# move the direct pointer into our buffered data
268
buffered_offset += cur_size
269
# Move the start-of-buffer pointer
270
input_start += cur_size
271
# Yield the requested data
272
yield cur_offset, cur_data
273
cur_offset, cur_size = offset_iter.next()
274
# at this point, we've consumed as much of buffered as we can,
275
# so break off the portion that we consumed
276
if buffered_offset == len(buffered_data):
277
# No tail to leave behind
281
buffered = buffered[buffered_offset:]
282
buffered_data = [buffered]
283
buffered_len = len(buffered)
285
buffered = ''.join(buffered_data)
287
data_chunks.append((input_start, buffered))
289
if 'sftp' in debug.debug_flags:
290
mutter('SFTP readv left with %d out-of-order bytes',
291
sum(map(lambda x: len(x[1]), data_chunks)))
292
# We've processed all the readv data, at this point, anything we
293
# couldn't process is in data_chunks. This doesn't happen often, so
294
# this code path isn't optimized
295
# We use an interesting process for data_chunks
296
# Specifically if we have "bisect_left([(start, len, entries)],
298
# If start == qstart, then we get the specific node. Otherwise we
299
# get the previous node
301
idx = bisect.bisect_left(data_chunks, (cur_offset,))
302
if idx < len(data_chunks) and data_chunks[idx][0] == cur_offset:
303
# The data starts here
304
data = data_chunks[idx][1][:cur_size]
306
# The data is in a portion of a previous page
308
sub_offset = cur_offset - data_chunks[idx][0]
309
data = data_chunks[idx][1]
310
data = data[sub_offset:sub_offset + cur_size]
312
# We are missing the page where the data should be found,
315
if len(data) != cur_size:
316
raise AssertionError('We must have miscalulated.'
317
' We expected %d bytes, but only found %d'
318
% (cur_size, len(data)))
319
yield cur_offset, data
320
cur_offset, cur_size = offset_iter.next()
323
class SFTPTransport(ConnectedTransport):
324
"""Transport implementation for SFTP access."""
326
_do_prefetch = _default_do_prefetch
327
# TODO: jam 20060717 Conceivably these could be configurable, either
328
# by auto-tuning at run-time, or by a configuration (per host??)
329
# but the performance curve is pretty flat, so just going with
330
# reasonable defaults.
331
_max_readv_combine = 200
332
# Having to round trip to the server means waiting for a response,
333
# so it is better to download extra bytes.
334
# 8KiB had good performance for both local and remote network operations
335
_bytes_to_read_before_seek = 8192
337
# The sftp spec says that implementations SHOULD allow reads
338
# to be at least 32K. paramiko.readv() does an async request
339
# for the chunks. So we need to keep it within a single request
340
# size for paramiko <= 1.6.1. paramiko 1.6.2 will probably chop
341
# up the request itself, rather than us having to worry about it
342
_max_request_size = 32768
344
def __init__(self, base, _from_transport=None):
345
super(SFTPTransport, self).__init__(base,
346
_from_transport=_from_transport)
348
def _remote_path(self, relpath):
349
"""Return the path to be passed along the sftp protocol for relpath.
351
:param relpath: is a urlencoded string.
353
relative = urlutils.unescape(relpath).encode('utf-8')
354
remote_path = self._combine_paths(self._path, relative)
355
# the initial slash should be removed from the path, and treated as a
356
# homedir relative path (the path begins with a double slash if it is
357
# absolute). see draft-ietf-secsh-scp-sftp-ssh-uri-03.txt
358
# RBC 20060118 we are not using this as its too user hostile. instead
359
# we are following lftp and using /~/foo to mean '~/foo'
360
# vila--20070602 and leave absolute paths begin with a single slash.
361
if remote_path.startswith('/~/'):
362
remote_path = remote_path[3:]
363
elif remote_path == '/~':
367
def _create_connection(self, credentials=None):
368
"""Create a new connection with the provided credentials.
370
:param credentials: The credentials needed to establish the connection.
372
:return: The created connection and its associated credentials.
374
The credentials are only the password as it may have been entered
375
interactively by the user and may be different from the one provided
376
in base url at transport creation time.
378
if credentials is None:
379
password = self._password
381
password = credentials
383
vendor = ssh._get_ssh_vendor()
386
auth = config.AuthenticationConfig()
387
user = auth.get_user('ssh', self._host, self._port)
388
connection = vendor.connect_sftp(self._user, password,
389
self._host, self._port)
390
return connection, (user, password)
393
"""Ensures that a connection is established"""
394
connection = self._get_connection()
395
if connection is None:
396
# First connection ever
397
connection, credentials = self._create_connection()
398
self._set_connection(connection, credentials)
190
path = '/'.join(basepath)
191
# could still be a "relative" path here, but relative on the sftp server
194
def relpath(self, abspath):
195
# FIXME: this is identical to HttpTransport -- share it
196
m = self._url_matcher.match(abspath)
198
if not path.startswith(self._path):
199
raise NonRelativePath('path %r is not under base URL %r'
200
% (abspath, self.base))
202
return abspath[pl:].lstrip('/')
401
204
def has(self, relpath):
403
206
Does the target location exist?
406
self._get_sftp().stat(self._remote_path(relpath))
407
# stat result is about 20 bytes, let's say
408
self._report_activity(20, 'read')
209
self._sftp.stat(self._abspath(relpath))
413
def get(self, relpath):
414
"""Get the file at the given relative path.
214
def get(self, relpath, decode=False):
216
Get the file at the given relative path.
416
218
:param relpath: The relative path to the file
419
# FIXME: by returning the file directly, we don't pass this
420
# through to report_activity. We could try wrapping the object
421
# before it's returned. For readv and get_bytes it's handled in
422
# the higher-level function.
424
path = self._remote_path(relpath)
425
f = self._get_sftp().file(path, mode='rb')
426
if self._do_prefetch and (getattr(f, 'prefetch', None) is not None):
221
path = self._abspath(relpath)
222
f = self._sftp.file(path)
225
except AttributeError:
226
# only works on paramiko 1.5.1 or greater
429
except (IOError, paramiko.SSHException), e:
430
self._translate_io_exception(e, path, ': error retrieving',
431
failure_exc=errors.ReadError)
433
def get_bytes(self, relpath):
434
# reimplement this here so that we can report how many bytes came back
229
except (IOError, paramiko.SSHException), x:
230
raise NoSuchFile('Error retrieving %s: %s' % (path, str(x)), x)
232
def get_partial(self, relpath, start, length=None):
234
Get just part of a file.
236
:param relpath: Path to the file, relative to base
237
:param start: The starting position to read from
238
:param length: The length to read. A length of None indicates
239
read to the end of the file.
240
:return: A file-like object containing at least the specified bytes.
241
Some implementations may return objects which can be read
242
past this length, but this is not guaranteed.
244
# TODO: implement get_partial_multi to help with knit support
435
245
f = self.get(relpath)
438
self._report_activity(len(bytes), 'read')
443
def _readv(self, relpath, offsets):
444
"""See Transport.readv()"""
445
# We overload the default readv() because we want to use a file
446
# that does not have prefetch enabled.
447
# Also, if we have a new paramiko, it implements an async readv()
452
path = self._remote_path(relpath)
453
fp = self._get_sftp().file(path, mode='rb')
454
readv = getattr(fp, 'readv', None)
456
return self._sftp_readv(fp, offsets, relpath)
457
if 'sftp' in debug.debug_flags:
458
mutter('seek and read %s offsets', len(offsets))
459
return self._seek_and_read(fp, offsets, relpath)
460
except (IOError, paramiko.SSHException), e:
461
self._translate_io_exception(e, path, ': error retrieving')
463
def recommended_page_size(self):
464
"""See Transport.recommended_page_size().
466
For SFTP we suggest a large page size to reduce the overhead
467
introduced by latency.
471
def _sftp_readv(self, fp, offsets, relpath):
472
"""Use the readv() member of fp to do async readv.
474
Then read them using paramiko.readv(). paramiko.readv()
475
does not support ranges > 64K, so it caps the request size, and
476
just reads until it gets all the stuff it wants.
478
helper = _SFTPReadvHelper(offsets, relpath, self._report_activity)
479
return helper.request_and_yield_offsets(fp)
481
def put_file(self, relpath, f, mode=None):
483
Copy the file-like object into the location.
249
except AttributeError:
250
# only works on paramiko 1.5.1 or greater
254
def put(self, relpath, f):
256
Copy the file-like or string object into the location.
485
258
:param relpath: Location to put the contents, relative to base.
486
:param f: File-like object.
487
:param mode: The final mode for the file
259
:param f: File-like or string object.
489
final_path = self._remote_path(relpath)
490
return self._put(final_path, f, mode=mode)
492
def _put(self, abspath, f, mode=None):
493
"""Helper function so both put() and copy_abspaths can reuse the code"""
494
tmp_abspath = '%s.tmp.%.9f.%d.%d' % (abspath, time.time(),
261
final_path = self._abspath(relpath)
262
tmp_relpath = '%s.tmp.%.9f.%d.%d' % (relpath, time.time(),
495
263
os.getpid(), random.randint(0,0x7FFFFFFF))
496
fout = self._sftp_open_exclusive(tmp_abspath, mode=mode)
264
tmp_abspath = self._abspath(tmp_relpath)
265
fout = self._sftp_open_exclusive(tmp_relpath)
500
fout.set_pipelined(True)
501
length = self._pump(f, fout)
502
except (IOError, paramiko.SSHException), e:
503
self._translate_io_exception(e, tmp_abspath)
504
# XXX: This doesn't truly help like we would like it to.
505
# The problem is that openssh strips sticky bits. So while we
506
# can properly set group write permission, we lose the group
507
# sticky bit. So it is probably best to stop chmodding, and
508
# just tell users that they need to set the umask correctly.
509
# The attr.st_mode = mode, in _sftp_open_exclusive
510
# will handle when the user wants the final mode to be more
511
# restrictive. And then we avoid a round trip. Unless
512
# paramiko decides to expose an async chmod()
514
# This is designed to chmod() right before we close.
515
# Because we set_pipelined() earlier, theoretically we might
516
# avoid the round trip for fout.close()
518
self._get_sftp().chmod(tmp_abspath, mode)
521
self._rename_and_overwrite(tmp_abspath, abspath)
271
self._translate_io_exception(e, relpath)
272
except paramiko.SSHException, x:
273
raise SFTPTransportError('Unable to write file %r' % (path,), x)
523
274
except Exception, e:
524
275
# If we fail, try to clean up the temporary file
525
276
# before we throw the exception
526
277
# but don't let another exception mess things up
527
# Write out the traceback, because otherwise
528
# the catch and throw destroys it
530
mutter(traceback.format_exc())
534
self._get_sftp().remove(tmp_abspath)
536
# raise the saved except
538
# raise the original with its traceback if we can.
541
def _put_non_atomic_helper(self, relpath, writer, mode=None,
542
create_parent_dir=False,
544
abspath = self._remote_path(relpath)
546
# TODO: jam 20060816 paramiko doesn't publicly expose a way to
547
# set the file mode at create time. If it does, use it.
548
# But for now, we just chmod later anyway.
550
def _open_and_write_file():
551
"""Try to open the target file, raise error on failure"""
555
fout = self._get_sftp().file(abspath, mode='wb')
556
fout.set_pipelined(True)
558
except (paramiko.SSHException, IOError), e:
559
self._translate_io_exception(e, abspath,
562
# This is designed to chmod() right before we close.
563
# Because we set_pipelined() earlier, theoretically we might
564
# avoid the round trip for fout.close()
566
self._get_sftp().chmod(abspath, mode)
571
if not create_parent_dir:
572
_open_and_write_file()
575
# Try error handling to create the parent directory if we need to
577
_open_and_write_file()
579
# Try to create the parent directory, and then go back to
581
parent_dir = os.path.dirname(abspath)
582
self._mkdir(parent_dir, dir_mode)
583
_open_and_write_file()
585
def put_file_non_atomic(self, relpath, f, mode=None,
586
create_parent_dir=False,
588
"""Copy the file-like object into the target location.
590
This function is not strictly safe to use. It is only meant to
591
be used when you already know that the target does not exist.
592
It is not safe, because it will open and truncate the remote
593
file. So there may be a time when the file has invalid contents.
595
:param relpath: The remote location to put the contents.
596
:param f: File-like object.
597
:param mode: Possible access permissions for new file.
598
None means do not set remote permissions.
599
:param create_parent_dir: If we cannot create the target file because
600
the parent directory does not exist, go ahead and
601
create it, and then try again.
605
self._put_non_atomic_helper(relpath, writer, mode=mode,
606
create_parent_dir=create_parent_dir,
609
def put_bytes_non_atomic(self, relpath, bytes, mode=None,
610
create_parent_dir=False,
614
self._put_non_atomic_helper(relpath, writer, mode=mode,
615
create_parent_dir=create_parent_dir,
280
self._sftp.remove(tmp_abspath)
285
# sftp rename doesn't allow overwriting, so play tricks:
286
tmp_safety = 'bzr.tmp.%.9f.%d.%d' % (time.time(), os.getpid(), random.randint(0, 0x7FFFFFFF))
287
tmp_safety = self._abspath(tmp_safety)
289
self._sftp.rename(final_path, tmp_safety)
294
self._sftp.rename(tmp_abspath, final_path)
296
self._translate_io_exception(e, relpath)
297
except paramiko.SSHException, x:
298
raise SFTPTransportError('Unable to rename into file %r'
301
self._sftp.unlink(tmp_safety)
618
303
def iter_files_recursive(self):
619
304
"""Walk the relative paths of all files in this transport."""
620
# progress is handled by list_dir
621
305
queue = list(self.list_dir('.'))
623
relpath = queue.pop(0)
307
relpath = urllib.quote(queue.pop(0))
624
308
st = self.stat(relpath)
625
309
if stat.S_ISDIR(st.st_mode):
626
310
for i, basename in enumerate(self.list_dir(relpath)):
631
def _mkdir(self, abspath, mode=None):
637
self._report_activity(len(abspath), 'write')
638
self._get_sftp().mkdir(abspath, local_mode)
639
self._report_activity(1, 'read')
641
# chmod a dir through sftp will erase any sgid bit set
642
# on the server side. So, if the bit mode are already
643
# set, avoid the chmod. If the mode is not fine but
644
# the sgid bit is set, report a warning to the user
645
# with the umask fix.
646
stat = self._get_sftp().lstat(abspath)
647
mode = mode & 0777 # can't set special bits anyway
648
if mode != stat.st_mode & 0777:
649
if stat.st_mode & 06000:
650
warning('About to chmod %s over sftp, which will result'
651
' in its suid or sgid bits being cleared. If'
652
' you want to preserve those bits, change your '
653
' environment on the server to use umask 0%03o.'
654
% (abspath, 0777 - mode))
655
self._get_sftp().chmod(abspath, mode=mode)
656
except (paramiko.SSHException, IOError), e:
657
self._translate_io_exception(e, abspath, ': unable to mkdir',
658
failure_exc=FileExists)
660
def mkdir(self, relpath, mode=None):
315
def mkdir(self, relpath):
661
316
"""Create a directory at the given path."""
662
self._mkdir(self._remote_path(relpath), mode=mode)
664
def open_write_stream(self, relpath, mode=None):
665
"""See Transport.open_write_stream."""
666
# initialise the file to zero-length
667
# this is three round trips, but we don't use this
668
# api more than once per write_group at the moment so
669
# it is a tolerable overhead. Better would be to truncate
670
# the file after opening. RBC 20070805
671
self.put_bytes_non_atomic(relpath, "", mode)
672
abspath = self._remote_path(relpath)
673
# TODO: jam 20060816 paramiko doesn't publicly expose a way to
674
# set the file mode at create time. If it does, use it.
675
# But for now, we just chmod later anyway.
678
handle = self._get_sftp().file(abspath, mode='wb')
679
handle.set_pipelined(True)
680
except (paramiko.SSHException, IOError), e:
681
self._translate_io_exception(e, abspath,
683
_file_streams[self.abspath(relpath)] = handle
684
return FileFileStream(self, relpath, handle)
686
def _translate_io_exception(self, e, path, more_info='',
687
failure_exc=PathError):
688
"""Translate a paramiko or IOError into a friendlier exception.
690
:param e: The original exception
691
:param path: The path in question when the error is raised
692
:param more_info: Extra information that can be included,
693
such as what was going on
694
:param failure_exc: Paramiko has the super fun ability to raise completely
695
opaque errors that just set "e.args = ('Failure',)" with
697
If this parameter is set, it defines the exception
698
to raise in these cases.
318
path = self._abspath(relpath)
319
self._sftp.mkdir(path)
321
self._translate_io_exception(e, relpath)
322
except (IOError, paramiko.SSHException), x:
323
raise SFTPTransportError('Unable to mkdir %r' % (path,), x)
325
def _translate_io_exception(self, e, relpath):
700
326
# paramiko seems to generate detailless errors.
701
self._translate_error(e, path, raise_generic=False)
702
if getattr(e, 'args', None) is not None:
703
if (e.args == ('No such file or directory',) or
704
e.args == ('No such file',)):
705
raise NoSuchFile(path, str(e) + more_info)
706
if (e.args == ('mkdir failed',) or
707
e.args[0].startswith('syserr: File exists')):
708
raise FileExists(path, str(e) + more_info)
709
# strange but true, for the paramiko server.
710
if (e.args == ('Failure',)):
711
raise failure_exc(path, str(e) + more_info)
712
# Can be something like args = ('Directory not empty:
713
# '/srv/bazaar.launchpad.net/blah...: '
714
# [Errno 39] Directory not empty',)
715
if (e.args[0].startswith('Directory not empty: ')
716
or getattr(e, 'errno', None) == errno.ENOTEMPTY):
717
raise errors.DirectoryNotEmpty(path, str(e))
718
mutter('Raising exception with args %s', e.args)
719
if getattr(e, 'errno', None) is not None:
720
mutter('Raising exception with errno %s', e.errno)
327
if (e.errno == errno.ENOENT or
328
e.args == ('No such file or directory',) or
329
e.args == ('No such file',)):
330
raise NoSuchFile(relpath)
331
if (e.args == ('mkdir failed',)):
332
raise FileExists(relpath)
333
# strange but true, for the paramiko server.
334
if (e.args == ('Failure',)):
335
raise FileExists(relpath)
723
def append_file(self, relpath, f, mode=None):
338
def append(self, relpath, f):
725
340
Append the text in the file-like object into the final
729
path = self._remote_path(relpath)
730
fout = self._get_sftp().file(path, 'ab')
732
self._get_sftp().chmod(path, mode)
344
path = self._abspath(relpath)
345
fout = self._sftp.file(path, 'ab')
734
346
self._pump(f, fout)
736
except (IOError, paramiko.SSHException), e:
737
self._translate_io_exception(e, relpath, ': unable to append')
739
def rename(self, rel_from, rel_to):
740
"""Rename without special overwriting"""
742
self._get_sftp().rename(self._remote_path(rel_from),
743
self._remote_path(rel_to))
744
except (IOError, paramiko.SSHException), e:
745
self._translate_io_exception(e, rel_from,
746
': unable to rename to %r' % (rel_to))
748
def _rename_and_overwrite(self, abs_from, abs_to):
749
"""Do a fancy rename on the remote server.
751
Using the implementation provided by osutils.
754
sftp = self._get_sftp()
755
fancy_rename(abs_from, abs_to,
756
rename_func=sftp.rename,
757
unlink_func=sftp.remove)
758
except (IOError, paramiko.SSHException), e:
759
self._translate_io_exception(e, abs_from,
760
': unable to rename to %r' % (abs_to))
347
except (IOError, paramiko.SSHException), x:
348
raise SFTPTransportError('Unable to append file %r' % (path,), x)
350
def copy(self, rel_from, rel_to):
351
"""Copy the item at rel_from to the location at rel_to"""
352
path_from = self._abspath(rel_from)
353
path_to = self._abspath(rel_to)
355
fin = self._sftp.file(path_from, 'rb')
357
fout = self._sftp.file(path_to, 'wb')
359
fout.set_pipelined(True)
360
self._pump(fin, fout)
365
except (IOError, paramiko.SSHException), x:
366
raise SFTPTransportError('Unable to copy %r to %r' % (path_from, path_to), x)
762
368
def move(self, rel_from, rel_to):
763
369
"""Move the item at rel_from to the location at rel_to"""
764
path_from = self._remote_path(rel_from)
765
path_to = self._remote_path(rel_to)
766
self._rename_and_overwrite(path_from, path_to)
370
path_from = self._abspath(rel_from)
371
path_to = self._abspath(rel_to)
373
self._sftp.rename(path_from, path_to)
374
except (IOError, paramiko.SSHException), x:
375
raise SFTPTransportError('Unable to move %r to %r' % (path_from, path_to), x)
768
377
def delete(self, relpath):
769
378
"""Delete the item at relpath"""
770
path = self._remote_path(relpath)
379
path = self._abspath(relpath)
772
self._get_sftp().remove(path)
773
except (IOError, paramiko.SSHException), e:
774
self._translate_io_exception(e, path, ': unable to delete')
776
def external_url(self):
777
"""See bzrlib.transport.Transport.external_url."""
778
# the external path for SFTP is the base
381
self._sftp.remove(path)
382
except (IOError, paramiko.SSHException), x:
383
raise SFTPTransportError('Unable to delete %r' % (path,), x)
781
385
def listable(self):
782
386
"""Return True if this store supports listing."""
840
431
# that we have taken the lock.
841
432
return SFTPLock(relpath, self)
843
def _sftp_open_exclusive(self, abspath, mode=None):
435
def _unparse_url(self, path=None):
439
username = urllib.quote(self._username)
441
username += ':' + urllib.quote(self._password)
443
host += ':%d' % self._port
444
return 'sftp://%s@%s/%s' % (username, host, urllib.quote(path))
446
def _parse_url(self, url):
447
assert url[:7] == 'sftp://'
448
m = self._url_matcher.match(url)
450
raise SFTPTransportError('Unable to parse SFTP URL %r' % (url,))
451
self._username, self._password, self._host, self._port, self._path = m.groups()
452
if self._username is None:
453
self._username = getpass.getuser()
456
# username field is 'user:pass@' in this case, and password is ':pass'
457
username_len = len(self._username) - len(self._password) - 1
458
self._username = urllib.unquote(self._username[:username_len])
459
self._password = urllib.unquote(self._password[1:])
461
self._username = urllib.unquote(self._username[:-1])
462
if self._port is None:
466
self._port = int(self._port[1:])
468
raise SFTPTransportError('%s: invalid port number' % self._port[1:])
469
if (self._path is None) or (self._path == ''):
473
self._path = urllib.unquote(self._path[1:])
475
def _sftp_connect(self):
476
global SYSTEM_HOSTKEYS, BZR_HOSTKEYS
481
t = paramiko.Transport((self._host, self._port))
483
except paramiko.SSHException:
484
raise SFTPTransportError('Unable to reach SSH host %s:%d' % (self._host, self._port))
486
server_key = t.get_remote_server_key()
487
server_key_hex = paramiko.util.hexify(server_key.get_fingerprint())
488
keytype = server_key.get_name()
489
if SYSTEM_HOSTKEYS.has_key(self._host) and SYSTEM_HOSTKEYS[self._host].has_key(keytype):
490
our_server_key = SYSTEM_HOSTKEYS[self._host][keytype]
491
our_server_key_hex = paramiko.util.hexify(our_server_key.get_fingerprint())
492
elif BZR_HOSTKEYS.has_key(self._host) and BZR_HOSTKEYS[self._host].has_key(keytype):
493
our_server_key = BZR_HOSTKEYS[self._host][keytype]
494
our_server_key_hex = paramiko.util.hexify(our_server_key.get_fingerprint())
496
warning('Adding %s host key for %s: %s' % (keytype, self._host, server_key_hex))
497
if not BZR_HOSTKEYS.has_key(self._host):
498
BZR_HOSTKEYS[self._host] = {}
499
BZR_HOSTKEYS[self._host][keytype] = server_key
500
our_server_key = server_key
501
our_server_key_hex = paramiko.util.hexify(our_server_key.get_fingerprint())
503
if server_key != our_server_key:
504
filename1 = os.path.expanduser('~/.ssh/known_hosts')
505
filename2 = os.path.join(config_dir(), 'ssh_host_keys')
506
raise SFTPTransportError('Host keys for %s do not match! %s != %s' % \
507
(self._host, our_server_key_hex, server_key_hex),
508
['Try editing %s or %s' % (filename1, filename2)])
510
self._sftp_auth(t, self._username, self._host)
513
self._sftp = t.open_sftp_client()
514
except paramiko.SSHException:
515
raise BzrError('Unable to find path %s on SFTP server %s' % \
516
(self._path, self._host))
518
def _sftp_auth(self, transport, username, host):
519
agent = paramiko.Agent()
520
for key in agent.get_keys():
521
mutter('Trying SSH agent key %s' % paramiko.util.hexify(key.get_fingerprint()))
523
transport.auth_publickey(self._username, key)
525
except paramiko.SSHException, e:
528
# okay, try finding id_rsa or id_dss? (posix only)
529
if self._try_pkey_auth(transport, paramiko.RSAKey, 'id_rsa'):
531
if self._try_pkey_auth(transport, paramiko.DSSKey, 'id_dsa'):
536
transport.auth_password(self._username, self._password)
538
except paramiko.SSHException, e:
541
# give up and ask for a password
542
# FIXME: shouldn't be implementing UI this deep into bzrlib
543
enc = sys.stdout.encoding
544
password = getpass.getpass('SSH %s@%s password: ' %
545
(self._username.encode(enc, 'replace'), self._host.encode(enc, 'replace')))
547
transport.auth_password(self._username, password)
548
except paramiko.SSHException:
549
raise SFTPTransportError('Unable to authenticate to SSH host as %s@%s' % \
550
(self._username, self._host))
552
def _try_pkey_auth(self, transport, pkey_class, filename):
553
filename = os.path.expanduser('~/.ssh/' + filename)
555
key = pkey_class.from_private_key_file(filename)
556
transport.auth_publickey(self._username, key)
558
except paramiko.PasswordRequiredException:
559
# FIXME: shouldn't be implementing UI this deep into bzrlib
560
enc = sys.stdout.encoding
561
password = getpass.getpass('SSH %s password: ' %
562
(os.path.basename(filename).encode(enc, 'replace'),))
564
key = pkey_class.from_private_key_file(filename, password)
565
transport.auth_publickey(self._username, key)
567
except paramiko.SSHException:
568
mutter('SSH authentication via %s key failed.' % (os.path.basename(filename),))
569
except paramiko.SSHException:
570
mutter('SSH authentication via %s key failed.' % (os.path.basename(filename),))
575
def _sftp_open_exclusive(self, relpath):
844
576
"""Open a remote path exclusively.
846
578
SFTP supports O_EXCL (SFTP_FLAG_EXCL), which fails if
added
removed
bzrlib/transport/sftp.py
