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)
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)
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('/')
401
373
def has(self, relpath):
403
375
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')
378
self._sftp.stat(self._remote_path(relpath))
413
383
def get(self, relpath):
414
"""Get the file at the given relative path.
385
Get the file at the given relative path.
416
387
: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
390
path = self._remote_path(relpath)
425
f = self._get_sftp().file(path, mode='rb')
391
f = self._sftp.file(path, mode='rb')
426
392
if self._do_prefetch and (getattr(f, 'prefetch', None) is not None):
452
408
path = self._remote_path(relpath)
453
fp = self._get_sftp().file(path, mode='rb')
409
fp = self._sftp.file(path, mode='rb')
454
410
readv = getattr(fp, 'readv', None)
456
412
return self._sftp_readv(fp, offsets, relpath)
457
if 'sftp' in debug.debug_flags:
458
mutter('seek and read %s offsets', len(offsets))
413
mutter('seek and read %s offsets', len(offsets))
459
414
return self._seek_and_read(fp, offsets, relpath)
460
415
except (IOError, paramiko.SSHException), e:
461
416
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):
418
def _sftp_readv(self, fp, offsets, relpath='<unknown>'):
472
419
"""Use the readv() member of fp to do async readv.
474
Then read them using paramiko.readv(). paramiko.readv()
421
And then read them using paramiko.readv(). paramiko.readv()
475
422
does not support ranges > 64K, so it caps the request size, and
476
just reads until it gets all the stuff it wants.
423
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)
425
offsets = list(offsets)
426
sorted_offsets = sorted(offsets)
428
# The algorithm works as follows:
429
# 1) Coalesce nearby reads into a single chunk
430
# This generates a list of combined regions, the total size
431
# and the size of the sub regions. This coalescing step is limited
432
# in the number of nearby chunks to combine, and is allowed to
433
# skip small breaks in the requests. Limiting it makes sure that
434
# we can start yielding some data earlier, and skipping means we
435
# make fewer requests. (Beneficial even when using async)
436
# 2) Break up this combined regions into chunks that are smaller
437
# than 64KiB. Technically the limit is 65536, but we are a
438
# little bit conservative. This is because sftp has a maximum
439
# return chunk size of 64KiB (max size of an unsigned short)
440
# 3) Issue a readv() to paramiko to create an async request for
442
# 4) Read in the data as it comes back, until we've read one
443
# continuous section as determined in step 1
444
# 5) Break up the full sections into hunks for the original requested
445
# offsets. And put them in a cache
446
# 6) Check if the next request is in the cache, and if it is, remove
447
# it from the cache, and yield its data. Continue until no more
448
# entries are in the cache.
449
# 7) loop back to step 4 until all data has been read
451
# TODO: jam 20060725 This could be optimized one step further, by
452
# attempting to yield whatever data we have read, even before
453
# the first coallesced section has been fully processed.
455
# When coalescing for use with readv(), we don't really need to
456
# use any fudge factor, because the requests are made asynchronously
457
coalesced = list(self._coalesce_offsets(sorted_offsets,
458
limit=self._max_readv_combine,
462
for c_offset in coalesced:
463
start = c_offset.start
464
size = c_offset.length
466
# We need to break this up into multiple requests
468
next_size = min(size, self._max_request_size)
469
requests.append((start, next_size))
473
mutter('SFTP.readv() %s offsets => %s coalesced => %s requests',
474
len(offsets), len(coalesced), len(requests))
476
# Queue the current read until we have read the full coalesced section
479
cur_coalesced_stack = iter(coalesced)
480
cur_coalesced = cur_coalesced_stack.next()
482
# Cache the results, but only until they have been fulfilled
484
# turn the list of offsets into a stack
485
offset_stack = iter(offsets)
486
cur_offset_and_size = offset_stack.next()
488
for data in fp.readv(requests):
490
cur_data_len += len(data)
492
if cur_data_len < cur_coalesced.length:
494
assert cur_data_len == cur_coalesced.length, \
495
"Somehow we read too much: %s != %s" % (cur_data_len,
496
cur_coalesced.length)
497
all_data = ''.join(cur_data)
501
for suboffset, subsize in cur_coalesced.ranges:
502
key = (cur_coalesced.start+suboffset, subsize)
503
data_map[key] = all_data[suboffset:suboffset+subsize]
505
# Now that we've read some data, see if we can yield anything back
506
while cur_offset_and_size in data_map:
507
this_data = data_map.pop(cur_offset_and_size)
508
yield cur_offset_and_size[0], this_data
509
cur_offset_and_size = offset_stack.next()
511
# We read a coalesced entry, so mark it as done
513
# Now that we've read all of the data for this coalesced section
515
cur_coalesced = cur_coalesced_stack.next()
517
if cur_coalesced is not None:
518
raise errors.ShortReadvError(relpath, cur_coalesced.start,
519
cur_coalesced.length, len(data))
481
521
def put_file(self, relpath, f, mode=None):
885
# ------------- server test implementation --------------
888
from bzrlib.tests.stub_sftp import StubServer, StubSFTPServer
890
STUB_SERVER_KEY = """
891
-----BEGIN RSA PRIVATE KEY-----
892
MIICWgIBAAKBgQDTj1bqB4WmayWNPB+8jVSYpZYk80Ujvj680pOTh2bORBjbIAyz
893
oWGW+GUjzKxTiiPvVmxFgx5wdsFvF03v34lEVVhMpouqPAYQ15N37K/ir5XY+9m/
894
d8ufMCkjeXsQkKqFbAlQcnWMCRnOoPHS3I4vi6hmnDDeeYTSRvfLbW0fhwIBIwKB
895
gBIiOqZYaoqbeD9OS9z2K9KR2atlTxGxOJPXiP4ESqP3NVScWNwyZ3NXHpyrJLa0
896
EbVtzsQhLn6rF+TzXnOlcipFvjsem3iYzCpuChfGQ6SovTcOjHV9z+hnpXvQ/fon
897
soVRZY65wKnF7IAoUwTmJS9opqgrN6kRgCd3DASAMd1bAkEA96SBVWFt/fJBNJ9H
898
tYnBKZGw0VeHOYmVYbvMSstssn8un+pQpUm9vlG/bp7Oxd/m+b9KWEh2xPfv6zqU
899
avNwHwJBANqzGZa/EpzF4J8pGti7oIAPUIDGMtfIcmqNXVMckrmzQ2vTfqtkEZsA
900
4rE1IERRyiJQx6EJsz21wJmGV9WJQ5kCQQDwkS0uXqVdFzgHO6S++tjmjYcxwr3g
901
H0CoFYSgbddOT6miqRskOQF3DZVkJT3kyuBgU2zKygz52ukQZMqxCb1fAkASvuTv
902
qfpH87Qq5kQhNKdbbwbmd2NxlNabazPijWuphGTdW0VfJdWfklyS2Kr+iqrs/5wV
903
HhathJt636Eg7oIjAkA8ht3MQ+XSl9yIJIS8gVpbPxSw5OMfw0PjVE7tBdQruiSc
904
nvuQES5C9BMHjF39LZiGH1iLQy7FgdHyoP+eodI7
905
-----END RSA PRIVATE KEY-----
909
class SocketListener(threading.Thread):
911
def __init__(self, callback):
912
threading.Thread.__init__(self)
913
self._callback = callback
914
self._socket = socket.socket()
915
self._socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
916
self._socket.bind(('localhost', 0))
917
self._socket.listen(1)
918
self.port = self._socket.getsockname()[1]
919
self._stop_event = threading.Event()
922
# called from outside this thread
923
self._stop_event.set()
924
# use a timeout here, because if the test fails, the server thread may
925
# never notice the stop_event.
931
readable, writable_unused, exception_unused = \
932
select.select([self._socket], [], [], 0.1)
933
if self._stop_event.isSet():
935
if len(readable) == 0:
938
s, addr_unused = self._socket.accept()
939
# because the loopback socket is inline, and transports are
940
# never explicitly closed, best to launch a new thread.
941
threading.Thread(target=self._callback, args=(s,)).start()
942
except socket.error, x:
943
sys.excepthook(*sys.exc_info())
944
warning('Socket error during accept() within unit test server'
947
# probably a failed test; unit test thread will log the
949
sys.excepthook(*sys.exc_info())
950
warning('Exception from within unit test server thread: %r' %
954
class SocketDelay(object):
955
"""A socket decorator to make TCP appear slower.
957
This changes recv, send, and sendall to add a fixed latency to each python
958
call if a new roundtrip is detected. That is, when a recv is called and the
959
flag new_roundtrip is set, latency is charged. Every send and send_all
962
In addition every send, sendall and recv sleeps a bit per character send to
965
Not all methods are implemented, this is deliberate as this class is not a
966
replacement for the builtin sockets layer. fileno is not implemented to
967
prevent the proxy being bypassed.
971
_proxied_arguments = dict.fromkeys([
972
"close", "getpeername", "getsockname", "getsockopt", "gettimeout",
973
"setblocking", "setsockopt", "settimeout", "shutdown"])
975
def __init__(self, sock, latency, bandwidth=1.0,
978
:param bandwith: simulated bandwith (MegaBit)
979
:param really_sleep: If set to false, the SocketDelay will just
980
increase a counter, instead of calling time.sleep. This is useful for
981
unittesting the SocketDelay.
984
self.latency = latency
985
self.really_sleep = really_sleep
986
self.time_per_byte = 1 / (bandwidth / 8.0 * 1024 * 1024)
987
self.new_roundtrip = False
990
if self.really_sleep:
993
SocketDelay.simulated_time += s
995
def __getattr__(self, attr):
996
if attr in SocketDelay._proxied_arguments:
997
return getattr(self.sock, attr)
998
raise AttributeError("'SocketDelay' object has no attribute %r" %
1002
return SocketDelay(self.sock.dup(), self.latency, self.time_per_byte,
1005
def recv(self, *args):
1006
data = self.sock.recv(*args)
1007
if data and self.new_roundtrip:
1008
self.new_roundtrip = False
1009
self.sleep(self.latency)
1010
self.sleep(len(data) * self.time_per_byte)
1013
def sendall(self, data, flags=0):
1014
if not self.new_roundtrip:
1015
self.new_roundtrip = True
1016
self.sleep(self.latency)
1017
self.sleep(len(data) * self.time_per_byte)
1018
return self.sock.sendall(data, flags)
1020
def send(self, data, flags=0):
1021
if not self.new_roundtrip:
1022
self.new_roundtrip = True
1023
self.sleep(self.latency)
1024
bytes_sent = self.sock.send(data, flags)
1025
self.sleep(bytes_sent * self.time_per_byte)
1029
class SFTPServer(Server):
1030
"""Common code for SFTP server facilities."""
1032
def __init__(self, server_interface=StubServer):
1033
self._original_vendor = None
1034
self._homedir = None
1035
self._server_homedir = None
1036
self._listener = None
1038
self._vendor = ssh.ParamikoVendor()
1039
self._server_interface = server_interface
1042
self.add_latency = 0
1044
def _get_sftp_url(self, path):
1045
"""Calculate an sftp url to this server for path."""
1046
return 'sftp://foo:bar@localhost:%d/%s' % (self._listener.port, path)
1048
def log(self, message):
1049
"""StubServer uses this to log when a new server is created."""
1050
self.logs.append(message)
1052
def _run_server_entry(self, sock):
1053
"""Entry point for all implementations of _run_server.
1055
If self.add_latency is > 0.000001 then sock is given a latency adding
1058
if self.add_latency > 0.000001:
1059
sock = SocketDelay(sock, self.add_latency)
1060
return self._run_server(sock)
1062
def _run_server(self, s):
1063
ssh_server = paramiko.Transport(s)
1064
key_file = pathjoin(self._homedir, 'test_rsa.key')
1065
f = open(key_file, 'w')
1066
f.write(STUB_SERVER_KEY)
1068
host_key = paramiko.RSAKey.from_private_key_file(key_file)
1069
ssh_server.add_server_key(host_key)
1070
server = self._server_interface(self)
1071
ssh_server.set_subsystem_handler('sftp', paramiko.SFTPServer,
1072
StubSFTPServer, root=self._root,
1073
home=self._server_homedir)
1074
event = threading.Event()
1075
ssh_server.start_server(event, server)
1078
def setUp(self, backing_server=None):
1079
# XXX: TODO: make sftpserver back onto backing_server rather than local
1081
assert (backing_server is None or
1082
isinstance(backing_server, local.LocalURLServer)), (
1083
"backing_server should not be %r, because this can only serve the "
1084
"local current working directory." % (backing_server,))
1085
self._original_vendor = ssh._ssh_vendor_manager._cached_ssh_vendor
1086
ssh._ssh_vendor_manager._cached_ssh_vendor = self._vendor
1087
if sys.platform == 'win32':
1088
# Win32 needs to use the UNICODE api
1089
self._homedir = getcwd()
1091
# But Linux SFTP servers should just deal in bytestreams
1092
self._homedir = os.getcwd()
1093
if self._server_homedir is None:
1094
self._server_homedir = self._homedir
1096
if sys.platform == 'win32':
1098
self._listener = SocketListener(self._run_server_entry)
1099
self._listener.setDaemon(True)
1100
self._listener.start()
1103
"""See bzrlib.transport.Server.tearDown."""
1104
self._listener.stop()
1105
ssh._ssh_vendor_manager._cached_ssh_vendor = self._original_vendor
1107
def get_bogus_url(self):
1108
"""See bzrlib.transport.Server.get_bogus_url."""
1109
# this is chosen to try to prevent trouble with proxies, wierd dns, etc
1110
# we bind a random socket, so that we get a guaranteed unused port
1111
# we just never listen on that port
1113
s.bind(('localhost', 0))
1114
return 'sftp://%s:%s/' % s.getsockname()
1117
class SFTPFullAbsoluteServer(SFTPServer):
1118
"""A test server for sftp transports, using absolute urls and ssh."""
1121
"""See bzrlib.transport.Server.get_url."""
1122
homedir = self._homedir
1123
if sys.platform != 'win32':
1124
# Remove the initial '/' on all platforms but win32
1125
homedir = homedir[1:]
1126
return self._get_sftp_url(urlutils.escape(homedir))
1129
class SFTPServerWithoutSSH(SFTPServer):
1130
"""An SFTP server that uses a simple TCP socket pair rather than SSH."""
1133
super(SFTPServerWithoutSSH, self).__init__()
1134
self._vendor = ssh.LoopbackVendor()
1136
def _run_server(self, sock):
1137
# Re-import these as locals, so that they're still accessible during
1138
# interpreter shutdown (when all module globals get set to None, leading
1139
# to confusing errors like "'NoneType' object has no attribute 'error'".
1140
class FakeChannel(object):
1141
def get_transport(self):
1143
def get_log_channel(self):
1147
def get_hexdump(self):
1152
server = paramiko.SFTPServer(FakeChannel(), 'sftp', StubServer(self), StubSFTPServer,
1153
root=self._root, home=self._server_homedir)
1155
server.start_subsystem('sftp', None, sock)
1156
except socket.error, e:
1157
if (len(e.args) > 0) and (e.args[0] == errno.EPIPE):
1158
# it's okay for the client to disconnect abruptly
1159
# (bug in paramiko 1.6: it should absorb this exception)
1163
except Exception, e:
1164
# This typically seems to happen during interpreter shutdown, so
1165
# most of the useful ways to report this error are won't work.
1166
# Writing the exception type, and then the text of the exception,
1167
# seems to be the best we can do.
1169
sys.stderr.write('\nEXCEPTION %r: ' % (e.__class__,))
1170
sys.stderr.write('%s\n\n' % (e,))
1171
server.finish_subsystem()
1174
class SFTPAbsoluteServer(SFTPServerWithoutSSH):
1175
"""A test server for sftp transports, using absolute urls."""
1178
"""See bzrlib.transport.Server.get_url."""
1179
homedir = self._homedir
1180
if sys.platform != 'win32':
1181
# Remove the initial '/' on all platforms but win32
1182
homedir = homedir[1:]
1183
return self._get_sftp_url(urlutils.escape(homedir))
1186
class SFTPHomeDirServer(SFTPServerWithoutSSH):
1187
"""A test server for sftp transports, using homedir relative urls."""
1190
"""See bzrlib.transport.Server.get_url."""
1191
return self._get_sftp_url("~/")
1194
class SFTPSiblingAbsoluteServer(SFTPAbsoluteServer):
1195
"""A test server for sftp transports where only absolute paths will work.
1197
It does this by serving from a deeply-nested directory that doesn't exist.
1200
def setUp(self, backing_server=None):
1201
self._server_homedir = '/dev/noone/runs/tests/here'
1202
super(SFTPSiblingAbsoluteServer, self).setUp(backing_server)
1205
def _sftp_connect(host, port, username, password):
1206
"""Connect to the remote sftp server.
1208
:raises: a TransportError 'could not connect'.
1210
:returns: an paramiko.sftp_client.SFTPClient
1212
TODO: Raise a more reasonable ConnectionFailed exception
1214
idx = (host, port, username)
1216
return _connected_hosts[idx]
1220
sftp = _sftp_connect_uncached(host, port, username, password)
1221
_connected_hosts[idx] = sftp
1224
def _sftp_connect_uncached(host, port, username, password):
1225
vendor = ssh._get_ssh_vendor()
1226
sftp = vendor.connect_sftp(username, password, host, port)
908
1230
def get_test_permutations():
909
1231
"""Return the permutations to be used in testing."""
910
from bzrlib.tests import stub_sftp
911
return [(SFTPTransport, stub_sftp.SFTPAbsoluteServer),
912
(SFTPTransport, stub_sftp.SFTPHomeDirServer),
913
(SFTPTransport, stub_sftp.SFTPSiblingAbsoluteServer),
1232
return [(SFTPTransport, SFTPAbsoluteServer),
1233
(SFTPTransport, SFTPHomeDirServer),
1234
(SFTPTransport, SFTPSiblingAbsoluteServer),
added
removed
bzrlib/transport/sftp.py
