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
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):
138
class SFTPUrlHandling(Transport):
139
"""Mix-in that does common handling of SSH/SFTP URLs."""
141
def __init__(self, base):
142
self._parse_url(base)
143
base = self._unparse_url(self._path)
146
super(SFTPUrlHandling, self).__init__(base)
148
def _parse_url(self, url):
150
self._username, self._password,
151
self._host, self._port, self._path) = self._split_url(url)
153
def _unparse_url(self, path):
154
"""Return a URL for a path relative to this transport.
156
path = urllib.quote(path)
157
# handle homedir paths
158
if not path.startswith('/'):
160
netloc = urllib.quote(self._host)
161
if self._username is not None:
162
netloc = '%s@%s' % (urllib.quote(self._username), netloc)
163
if self._port is not None:
164
netloc = '%s:%d' % (netloc, self._port)
165
return urlparse.urlunparse((self._scheme, netloc, path, '', '', ''))
167
def _split_url(self, url):
168
(scheme, username, password, host, port, path) = split_url(url)
169
## assert scheme == 'sftp'
171
# the initial slash should be removed from the path, and treated
172
# as a homedir relative path (the path begins with a double slash
173
# if it is absolute).
174
# see draft-ietf-secsh-scp-sftp-ssh-uri-03.txt
175
# RBC 20060118 we are not using this as its too user hostile. instead
176
# we are following lftp and using /~/foo to mean '~/foo'.
177
# handle homedir paths
178
if path.startswith('/~/'):
182
return (scheme, username, password, host, port, path)
184
def abspath(self, relpath):
185
"""Return the full url to the given relative path.
187
@param relpath: the relative path or path components
188
@type relpath: str or list
190
return self._unparse_url(self._remote_path(relpath))
192
def _remote_path(self, relpath):
193
"""Return the path to be passed along the sftp protocol for relpath.
195
:param relpath: is a urlencoded string.
197
return self._combine_paths(self._path, relpath)
200
class SFTPTransport(SFTPUrlHandling):
324
201
"""Transport implementation for SFTP access."""
326
203
_do_prefetch = _default_do_prefetch
341
218
# up the request itself, rather than us having to worry about it
342
219
_max_request_size = 32768
344
def __init__(self, base, _from_transport=None):
345
super(SFTPTransport, self).__init__(base,
346
_from_transport=_from_transport)
221
def __init__(self, base, clone_from=None):
222
super(SFTPTransport, self).__init__(base)
223
if clone_from is None:
226
# use the same ssh connection, etc
227
self._sftp = clone_from._sftp
228
# super saves 'self.base'
230
def should_cache(self):
232
Return True if the data pulled across should be cached locally.
236
def clone(self, offset=None):
238
Return a new SFTPTransport with root at self.base + offset.
239
We share the same SFTP session between such transports, because it's
240
fairly expensive to set them up.
243
return SFTPTransport(self.base, self)
245
return SFTPTransport(self.abspath(offset), self)
348
247
def _remote_path(self, relpath):
349
248
"""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
250
relpath is a urlencoded string.
252
:return: a path prefixed with / for regular abspath-based urls, or a
253
path that does not begin with / for urls which begin with /~/.
255
# how does this work?
256
# it processes relpath with respect to
258
# firstly we create a path to evaluate:
259
# if relpath is an abspath or homedir path, its the entire thing
260
# otherwise we join our base with relpath
261
# then we eliminate all empty segments (double //'s) outside the first
262
# two elements of the list. This avoids problems with trailing
263
# slashes, or other abnormalities.
264
# finally we evaluate the entire path in a single pass
266
# '..' result in popping the left most already
267
# processed path (which can never be empty because of the check for
268
# abspath and homedir meaning that its not, or that we've used our
269
# path. If the pop would pop the root, we ignore it.
271
# Specific case examinations:
272
# remove the special casefor ~: if the current root is ~/ popping of it
273
# = / thus our seed for a ~ based path is ['', '~']
274
# and if we end up with [''] then we had basically ('', '..') (which is
275
# '/..' so we append '' if the length is one, and assert that the first
276
# element is still ''. Lastly, if we end with ['', '~'] as a prefix for
277
# the output, we've got a homedir path, so we strip that prefix before
278
# '/' joining the resulting list.
280
# case one: '/' -> ['', ''] cannot shrink
281
# case two: '/' + '../foo' -> ['', 'foo'] (take '', '', '..', 'foo')
282
# and pop the second '' for the '..', append 'foo'
283
# case three: '/~/' -> ['', '~', '']
284
# case four: '/~/' + '../foo' -> ['', '~', '', '..', 'foo'],
285
# and we want to get '/foo' - the empty path in the middle
286
# needs to be stripped, then normal path manipulation will
288
# case five: '/..' ['', '..'], we want ['', '']
289
# stripping '' outside the first two is ok
290
# ignore .. if its too high up
292
# lastly this code is possibly reusable by FTP, but not reusable by
293
# local paths: ~ is resolvable correctly, nor by HTTP or the smart
294
# server: ~ is resolved remotely.
296
# however, a version of this that acts on self.base is possible to be
297
# written which manipulates the URL in canonical form, and would be
298
# reusable for all transports, if a flag for allowing ~/ at all was
300
assert isinstance(relpath, basestring)
301
relpath = urlutils.unescape(relpath)
304
if relpath.startswith('/'):
305
# abspath - normal split is fine.
306
current_path = relpath.split('/')
307
elif relpath.startswith('~/'):
308
# root is homedir based: normal split and prefix '' to remote the
310
current_path = [''].extend(relpath.split('/'))
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)
392
def disconnect(self):
393
connection = self._get_connection()
394
if connection is not None:
398
"""Ensures that a connection is established"""
399
connection = self._get_connection()
400
if connection is None:
401
# First connection ever
402
connection, credentials = self._create_connection()
403
self._set_connection(connection, credentials)
312
# root is from the current directory:
313
if self._path.startswith('/'):
314
# abspath, take the regular split
317
# homedir based, add the '', '~' not present in self._path
318
current_path = ['', '~']
319
# add our current dir
320
current_path.extend(self._path.split('/'))
321
# add the users relpath
322
current_path.extend(relpath.split('/'))
323
# strip '' segments that are not in the first one - the leading /.
324
to_process = current_path[:1]
325
for segment in current_path[1:]:
327
to_process.append(segment)
329
# process '.' and '..' segments into output_path.
331
for segment in to_process:
333
# directory pop. Remove a directory
334
# as long as we are not at the root
335
if len(output_path) > 1:
338
# cannot pop beyond the root, so do nothing
340
continue # strip the '.' from the output.
342
# this will append '' to output_path for the root elements,
343
# which is appropriate: its why we strip '' in the first pass.
344
output_path.append(segment)
346
# check output special cases:
347
if output_path == ['']:
349
output_path = ['', '']
350
elif output_path[:2] == ['', '~']:
351
# ['', '~', ...] -> ...
352
output_path = output_path[2:]
353
path = '/'.join(output_path)
356
def relpath(self, abspath):
357
scheme, username, password, host, port, path = self._split_url(abspath)
359
if (username != self._username):
360
error.append('username mismatch')
361
if (host != self._host):
362
error.append('host mismatch')
363
if (port != self._port):
364
error.append('port mismatch')
365
if (not path.startswith(self._path)):
366
error.append('path mismatch')
368
extra = ': ' + ', '.join(error)
369
raise PathNotChild(abspath, self.base, extra=extra)
371
return path[pl:].strip('/')
406
373
def has(self, relpath):
408
375
Does the target location exist?
411
self._get_sftp().stat(self._remote_path(relpath))
412
# stat result is about 20 bytes, let's say
413
self._report_activity(20, 'read')
378
self._sftp.stat(self._remote_path(relpath))
418
383
def get(self, relpath):
419
"""Get the file at the given relative path.
385
Get the file at the given relative path.
421
387
:param relpath: The relative path to the file
424
# FIXME: by returning the file directly, we don't pass this
425
# through to report_activity. We could try wrapping the object
426
# before it's returned. For readv and get_bytes it's handled in
427
# the higher-level function.
429
390
path = self._remote_path(relpath)
430
f = self._get_sftp().file(path, mode='rb')
391
f = self._sftp.file(path, mode='rb')
431
392
if self._do_prefetch and (getattr(f, 'prefetch', None) is not None):
434
395
except (IOError, paramiko.SSHException), e:
435
self._translate_io_exception(e, path, ': error retrieving',
436
failure_exc=errors.ReadError)
438
def get_bytes(self, relpath):
439
# reimplement this here so that we can report how many bytes came back
440
f = self.get(relpath)
443
self._report_activity(len(bytes), 'read')
448
def _readv(self, relpath, offsets):
396
self._translate_io_exception(e, path, ': error retrieving')
398
def readv(self, relpath, offsets):
449
399
"""See Transport.readv()"""
450
400
# We overload the default readv() because we want to use a file
451
401
# that does not have prefetch enabled.
457
407
path = self._remote_path(relpath)
458
fp = self._get_sftp().file(path, mode='rb')
408
fp = self._sftp.file(path, mode='rb')
459
409
readv = getattr(fp, 'readv', None)
461
411
return self._sftp_readv(fp, offsets, relpath)
462
if 'sftp' in debug.debug_flags:
463
mutter('seek and read %s offsets', len(offsets))
412
mutter('seek and read %s offsets', len(offsets))
464
413
return self._seek_and_read(fp, offsets, relpath)
465
414
except (IOError, paramiko.SSHException), e:
466
415
self._translate_io_exception(e, path, ': error retrieving')
468
def recommended_page_size(self):
469
"""See Transport.recommended_page_size().
471
For SFTP we suggest a large page size to reduce the overhead
472
introduced by latency.
476
def _sftp_readv(self, fp, offsets, relpath):
417
def _sftp_readv(self, fp, offsets, relpath='<unknown>'):
477
418
"""Use the readv() member of fp to do async readv.
479
Then read them using paramiko.readv(). paramiko.readv()
420
And then read them using paramiko.readv(). paramiko.readv()
480
421
does not support ranges > 64K, so it caps the request size, and
481
just reads until it gets all the stuff it wants.
422
just reads until it gets all the stuff it wants
483
helper = _SFTPReadvHelper(offsets, relpath, self._report_activity)
484
return helper.request_and_yield_offsets(fp)
424
offsets = list(offsets)
425
sorted_offsets = sorted(offsets)
427
# The algorithm works as follows:
428
# 1) Coalesce nearby reads into a single chunk
429
# This generates a list of combined regions, the total size
430
# and the size of the sub regions. This coalescing step is limited
431
# in the number of nearby chunks to combine, and is allowed to
432
# skip small breaks in the requests. Limiting it makes sure that
433
# we can start yielding some data earlier, and skipping means we
434
# make fewer requests. (Beneficial even when using async)
435
# 2) Break up this combined regions into chunks that are smaller
436
# than 64KiB. Technically the limit is 65536, but we are a
437
# little bit conservative. This is because sftp has a maximum
438
# return chunk size of 64KiB (max size of an unsigned short)
439
# 3) Issue a readv() to paramiko to create an async request for
441
# 4) Read in the data as it comes back, until we've read one
442
# continuous section as determined in step 1
443
# 5) Break up the full sections into hunks for the original requested
444
# offsets. And put them in a cache
445
# 6) Check if the next request is in the cache, and if it is, remove
446
# it from the cache, and yield its data. Continue until no more
447
# entries are in the cache.
448
# 7) loop back to step 4 until all data has been read
450
# TODO: jam 20060725 This could be optimized one step further, by
451
# attempting to yield whatever data we have read, even before
452
# the first coallesced section has been fully processed.
454
# When coalescing for use with readv(), we don't really need to
455
# use any fudge factor, because the requests are made asynchronously
456
coalesced = list(self._coalesce_offsets(sorted_offsets,
457
limit=self._max_readv_combine,
461
for c_offset in coalesced:
462
start = c_offset.start
463
size = c_offset.length
465
# We need to break this up into multiple requests
467
next_size = min(size, self._max_request_size)
468
requests.append((start, next_size))
472
mutter('SFTP.readv() %s offsets => %s coalesced => %s requests',
473
len(offsets), len(coalesced), len(requests))
475
# Queue the current read until we have read the full coalesced section
478
cur_coalesced_stack = iter(coalesced)
479
cur_coalesced = cur_coalesced_stack.next()
481
# Cache the results, but only until they have been fulfilled
483
# turn the list of offsets into a stack
484
offset_stack = iter(offsets)
485
cur_offset_and_size = offset_stack.next()
487
for data in fp.readv(requests):
489
cur_data_len += len(data)
491
if cur_data_len < cur_coalesced.length:
493
assert cur_data_len == cur_coalesced.length, \
494
"Somehow we read too much: %s != %s" % (cur_data_len,
495
cur_coalesced.length)
496
all_data = ''.join(cur_data)
500
for suboffset, subsize in cur_coalesced.ranges:
501
key = (cur_coalesced.start+suboffset, subsize)
502
data_map[key] = all_data[suboffset:suboffset+subsize]
504
# Now that we've read some data, see if we can yield anything back
505
while cur_offset_and_size in data_map:
506
this_data = data_map.pop(cur_offset_and_size)
507
yield cur_offset_and_size[0], this_data
508
cur_offset_and_size = offset_stack.next()
510
# We read a coalesced entry, so mark it as done
512
# Now that we've read all of the data for this coalesced section
514
cur_coalesced = cur_coalesced_stack.next()
516
if cur_coalesced is not None:
517
raise errors.ShortReadvError(relpath, cur_coalesced.start,
518
cur_coalesced.length, len(data))
486
520
def put_file(self, relpath, f, mode=None):
879
# ------------- server test implementation --------------
882
from bzrlib.tests.stub_sftp import StubServer, StubSFTPServer
884
STUB_SERVER_KEY = """
885
-----BEGIN RSA PRIVATE KEY-----
886
MIICWgIBAAKBgQDTj1bqB4WmayWNPB+8jVSYpZYk80Ujvj680pOTh2bORBjbIAyz
887
oWGW+GUjzKxTiiPvVmxFgx5wdsFvF03v34lEVVhMpouqPAYQ15N37K/ir5XY+9m/
888
d8ufMCkjeXsQkKqFbAlQcnWMCRnOoPHS3I4vi6hmnDDeeYTSRvfLbW0fhwIBIwKB
889
gBIiOqZYaoqbeD9OS9z2K9KR2atlTxGxOJPXiP4ESqP3NVScWNwyZ3NXHpyrJLa0
890
EbVtzsQhLn6rF+TzXnOlcipFvjsem3iYzCpuChfGQ6SovTcOjHV9z+hnpXvQ/fon
891
soVRZY65wKnF7IAoUwTmJS9opqgrN6kRgCd3DASAMd1bAkEA96SBVWFt/fJBNJ9H
892
tYnBKZGw0VeHOYmVYbvMSstssn8un+pQpUm9vlG/bp7Oxd/m+b9KWEh2xPfv6zqU
893
avNwHwJBANqzGZa/EpzF4J8pGti7oIAPUIDGMtfIcmqNXVMckrmzQ2vTfqtkEZsA
894
4rE1IERRyiJQx6EJsz21wJmGV9WJQ5kCQQDwkS0uXqVdFzgHO6S++tjmjYcxwr3g
895
H0CoFYSgbddOT6miqRskOQF3DZVkJT3kyuBgU2zKygz52ukQZMqxCb1fAkASvuTv
896
qfpH87Qq5kQhNKdbbwbmd2NxlNabazPijWuphGTdW0VfJdWfklyS2Kr+iqrs/5wV
897
HhathJt636Eg7oIjAkA8ht3MQ+XSl9yIJIS8gVpbPxSw5OMfw0PjVE7tBdQruiSc
898
nvuQES5C9BMHjF39LZiGH1iLQy7FgdHyoP+eodI7
899
-----END RSA PRIVATE KEY-----
903
class SocketListener(threading.Thread):
905
def __init__(self, callback):
906
threading.Thread.__init__(self)
907
self._callback = callback
908
self._socket = socket.socket()
909
self._socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
910
self._socket.bind(('localhost', 0))
911
self._socket.listen(1)
912
self.port = self._socket.getsockname()[1]
913
self._stop_event = threading.Event()
916
# called from outside this thread
917
self._stop_event.set()
918
# use a timeout here, because if the test fails, the server thread may
919
# never notice the stop_event.
925
readable, writable_unused, exception_unused = \
926
select.select([self._socket], [], [], 0.1)
927
if self._stop_event.isSet():
929
if len(readable) == 0:
932
s, addr_unused = self._socket.accept()
933
# because the loopback socket is inline, and transports are
934
# never explicitly closed, best to launch a new thread.
935
threading.Thread(target=self._callback, args=(s,)).start()
936
except socket.error, x:
937
sys.excepthook(*sys.exc_info())
938
warning('Socket error during accept() within unit test server'
941
# probably a failed test; unit test thread will log the
943
sys.excepthook(*sys.exc_info())
944
warning('Exception from within unit test server thread: %r' %
948
class SocketDelay(object):
949
"""A socket decorator to make TCP appear slower.
951
This changes recv, send, and sendall to add a fixed latency to each python
952
call if a new roundtrip is detected. That is, when a recv is called and the
953
flag new_roundtrip is set, latency is charged. Every send and send_all
956
In addition every send, sendall and recv sleeps a bit per character send to
959
Not all methods are implemented, this is deliberate as this class is not a
960
replacement for the builtin sockets layer. fileno is not implemented to
961
prevent the proxy being bypassed.
965
_proxied_arguments = dict.fromkeys([
966
"close", "getpeername", "getsockname", "getsockopt", "gettimeout",
967
"setblocking", "setsockopt", "settimeout", "shutdown"])
969
def __init__(self, sock, latency, bandwidth=1.0,
972
:param bandwith: simulated bandwith (MegaBit)
973
:param really_sleep: If set to false, the SocketDelay will just
974
increase a counter, instead of calling time.sleep. This is useful for
975
unittesting the SocketDelay.
978
self.latency = latency
979
self.really_sleep = really_sleep
980
self.time_per_byte = 1 / (bandwidth / 8.0 * 1024 * 1024)
981
self.new_roundtrip = False
984
if self.really_sleep:
987
SocketDelay.simulated_time += s
989
def __getattr__(self, attr):
990
if attr in SocketDelay._proxied_arguments:
991
return getattr(self.sock, attr)
992
raise AttributeError("'SocketDelay' object has no attribute %r" %
996
return SocketDelay(self.sock.dup(), self.latency, self.time_per_byte,
999
def recv(self, *args):
1000
data = self.sock.recv(*args)
1001
if data and self.new_roundtrip:
1002
self.new_roundtrip = False
1003
self.sleep(self.latency)
1004
self.sleep(len(data) * self.time_per_byte)
1007
def sendall(self, data, flags=0):
1008
if not self.new_roundtrip:
1009
self.new_roundtrip = True
1010
self.sleep(self.latency)
1011
self.sleep(len(data) * self.time_per_byte)
1012
return self.sock.sendall(data, flags)
1014
def send(self, data, flags=0):
1015
if not self.new_roundtrip:
1016
self.new_roundtrip = True
1017
self.sleep(self.latency)
1018
bytes_sent = self.sock.send(data, flags)
1019
self.sleep(bytes_sent * self.time_per_byte)
1023
class SFTPServer(Server):
1024
"""Common code for SFTP server facilities."""
1026
def __init__(self, server_interface=StubServer):
1027
self._original_vendor = None
1028
self._homedir = None
1029
self._server_homedir = None
1030
self._listener = None
1032
self._vendor = ssh.ParamikoVendor()
1033
self._server_interface = server_interface
1036
self.add_latency = 0
1038
def _get_sftp_url(self, path):
1039
"""Calculate an sftp url to this server for path."""
1040
return 'sftp://foo:bar@localhost:%d/%s' % (self._listener.port, path)
1042
def log(self, message):
1043
"""StubServer uses this to log when a new server is created."""
1044
self.logs.append(message)
1046
def _run_server_entry(self, sock):
1047
"""Entry point for all implementations of _run_server.
1049
If self.add_latency is > 0.000001 then sock is given a latency adding
1052
if self.add_latency > 0.000001:
1053
sock = SocketDelay(sock, self.add_latency)
1054
return self._run_server(sock)
1056
def _run_server(self, s):
1057
ssh_server = paramiko.Transport(s)
1058
key_file = pathjoin(self._homedir, 'test_rsa.key')
1059
f = open(key_file, 'w')
1060
f.write(STUB_SERVER_KEY)
1062
host_key = paramiko.RSAKey.from_private_key_file(key_file)
1063
ssh_server.add_server_key(host_key)
1064
server = self._server_interface(self)
1065
ssh_server.set_subsystem_handler('sftp', paramiko.SFTPServer,
1066
StubSFTPServer, root=self._root,
1067
home=self._server_homedir)
1068
event = threading.Event()
1069
ssh_server.start_server(event, server)
1072
def setUp(self, vfs_server=None):
1073
# XXX: TODO: make sftpserver back onto vfs_server rather than local disk.
1074
assert vfs_server is None or isinstance(vfs_server, LocalURLServer), \
1075
"SFTPServer currently assumes local transport, got %s" % vfs_server
1076
self._original_vendor = ssh._ssh_vendor_manager._cached_ssh_vendor
1077
ssh._ssh_vendor_manager._cached_ssh_vendor = self._vendor
1078
if sys.platform == 'win32':
1079
# Win32 needs to use the UNICODE api
1080
self._homedir = getcwd()
1082
# But Linux SFTP servers should just deal in bytestreams
1083
self._homedir = os.getcwd()
1084
if self._server_homedir is None:
1085
self._server_homedir = self._homedir
1087
if sys.platform == 'win32':
1089
self._listener = SocketListener(self._run_server_entry)
1090
self._listener.setDaemon(True)
1091
self._listener.start()
1094
"""See bzrlib.transport.Server.tearDown."""
1095
self._listener.stop()
1096
ssh._ssh_vendor_manager._cached_ssh_vendor = self._original_vendor
1098
def get_bogus_url(self):
1099
"""See bzrlib.transport.Server.get_bogus_url."""
1100
# this is chosen to try to prevent trouble with proxies, wierd dns, etc
1101
# we bind a random socket, so that we get a guaranteed unused port
1102
# we just never listen on that port
1104
s.bind(('localhost', 0))
1105
return 'sftp://%s:%s/' % s.getsockname()
1108
class SFTPFullAbsoluteServer(SFTPServer):
1109
"""A test server for sftp transports, using absolute urls and ssh."""
1112
"""See bzrlib.transport.Server.get_url."""
1113
homedir = self._homedir
1114
if sys.platform != 'win32':
1115
# Remove the initial '/' on all platforms but win32
1116
homedir = homedir[1:]
1117
return self._get_sftp_url(urlutils.escape(homedir))
1120
class SFTPServerWithoutSSH(SFTPServer):
1121
"""An SFTP server that uses a simple TCP socket pair rather than SSH."""
1124
super(SFTPServerWithoutSSH, self).__init__()
1125
self._vendor = ssh.LoopbackVendor()
1127
def _run_server(self, sock):
1128
# Re-import these as locals, so that they're still accessible during
1129
# interpreter shutdown (when all module globals get set to None, leading
1130
# to confusing errors like "'NoneType' object has no attribute 'error'".
1131
class FakeChannel(object):
1132
def get_transport(self):
1134
def get_log_channel(self):
1138
def get_hexdump(self):
1143
server = paramiko.SFTPServer(FakeChannel(), 'sftp', StubServer(self), StubSFTPServer,
1144
root=self._root, home=self._server_homedir)
1146
server.start_subsystem('sftp', None, sock)
1147
except socket.error, e:
1148
if (len(e.args) > 0) and (e.args[0] == errno.EPIPE):
1149
# it's okay for the client to disconnect abruptly
1150
# (bug in paramiko 1.6: it should absorb this exception)
1154
except Exception, e:
1155
import sys; sys.stderr.write('\nEXCEPTION %r\n\n' % e.__class__)
1156
server.finish_subsystem()
1159
class SFTPAbsoluteServer(SFTPServerWithoutSSH):
1160
"""A test server for sftp transports, using absolute urls."""
1163
"""See bzrlib.transport.Server.get_url."""
1164
homedir = self._homedir
1165
if sys.platform != 'win32':
1166
# Remove the initial '/' on all platforms but win32
1167
homedir = homedir[1:]
1168
return self._get_sftp_url(urlutils.escape(homedir))
1171
class SFTPHomeDirServer(SFTPServerWithoutSSH):
1172
"""A test server for sftp transports, using homedir relative urls."""
1175
"""See bzrlib.transport.Server.get_url."""
1176
return self._get_sftp_url("~/")
1179
class SFTPSiblingAbsoluteServer(SFTPAbsoluteServer):
1180
"""A test servere for sftp transports, using absolute urls to non-home."""
1183
self._server_homedir = '/dev/noone/runs/tests/here'
1184
super(SFTPSiblingAbsoluteServer, self).setUp()
1187
def _sftp_connect(host, port, username, password):
1188
"""Connect to the remote sftp server.
1190
:raises: a TransportError 'could not connect'.
1192
:returns: an paramiko.sftp_client.SFTPClient
1194
TODO: Raise a more reasonable ConnectionFailed exception
1196
idx = (host, port, username)
1198
return _connected_hosts[idx]
1202
sftp = _sftp_connect_uncached(host, port, username, password)
1203
_connected_hosts[idx] = sftp
1206
def _sftp_connect_uncached(host, port, username, password):
1207
vendor = ssh._get_ssh_vendor()
1208
sftp = vendor.connect_sftp(username, password, host, port)
915
1212
def get_test_permutations():
916
1213
"""Return the permutations to be used in testing."""
917
from bzrlib.tests import stub_sftp
918
return [(SFTPTransport, stub_sftp.SFTPAbsoluteServer),
919
(SFTPTransport, stub_sftp.SFTPHomeDirServer),
920
(SFTPTransport, stub_sftp.SFTPSiblingAbsoluteServer),
1214
return [(SFTPTransport, SFTPAbsoluteServer),
1215
(SFTPTransport, SFTPHomeDirServer),
1216
(SFTPTransport, SFTPSiblingAbsoluteServer),
added
removed
bzrlib/transport/sftp.py
