83
87
one is being cloned from. Attributes such as the medium will
86
:param medium: The medium to use for this RemoteTransport. If None,
87
the medium from the _from_transport is shared. If both this
88
and _from_transport are None, a new medium will be built.
89
_from_transport and medium cannot both be specified.
90
:param medium: The medium to use for this RemoteTransport. This must be
91
supplied if _from_transport is None.
91
93
:param _client: Override the _SmartClient used by this transport. This
92
94
should only be used for testing purposes; normally this is
93
95
determined from the medium.
95
super(RemoteTransport, self).__init__(
96
url, _from_transport=_from_transport)
97
super(RemoteTransport, self).__init__(url,
98
_from_transport=_from_transport)
98
100
# The medium is the connection, except when we need to share it with
99
101
# other objects (RemoteBzrDir, RemoteRepository etc). In these cases
100
102
# what we want to share is really the shared connection.
102
if (_from_transport is not None
103
and isinstance(_from_transport, RemoteTransport)):
104
_client = _from_transport._client
105
elif _from_transport is None:
104
if _from_transport is None:
106
105
# If no _from_transport is specified, we need to intialize the
108
107
credentials = None
139
128
return None, None
141
def _report_activity(self, bytes, direction):
142
"""See Transport._report_activity.
144
Does nothing; the smart medium will report activity triggered by a
149
130
def is_readonly(self):
150
131
"""Smart server transport can do read/write file operations."""
152
resp = self._call2('Transport.is_readonly')
153
except errors.UnknownSmartMethod:
132
resp = self._call2('Transport.is_readonly')
133
if resp == ('yes', ):
135
elif resp == ('no', ):
137
elif (resp == ('error', "Generic bzr smart protocol error: "
138
"bad request 'Transport.is_readonly'") or
139
resp == ('error', "Generic bzr smart protocol error: "
140
"bad request u'Transport.is_readonly'")):
154
141
# XXX: nasty hack: servers before 0.16 don't have a
155
142
# 'Transport.is_readonly' verb, so we do what clients before 0.16
156
143
# did: assume False.
158
if resp == ('yes', ):
160
elif resp == ('no', ):
163
raise errors.UnexpectedSmartServerResponse(resp)
146
self._translate_error(resp)
147
raise errors.UnexpectedSmartServerResponse(resp)
165
149
def get_smart_client(self):
166
150
return self._get_connection()
168
152
def get_smart_medium(self):
169
153
return self._get_connection()
155
def get_shared_medium(self):
156
return self._get_shared_connection()
171
158
def _remote_path(self, relpath):
172
159
"""Returns the Unicode version of the absolute path for relpath."""
173
160
return self._combine_paths(self._path, relpath)
175
162
def _call(self, method, *args):
176
163
resp = self._call2(method, *args)
177
self._ensure_ok(resp)
164
self._translate_error(resp)
179
166
def _call2(self, method, *args):
180
167
"""Call a method on the remote server."""
182
return self._client.call(method, *args)
183
except errors.ErrorFromSmartServer, err:
184
# The first argument, if present, is always a path.
186
context = {'relpath': args[0]}
189
self._translate_error(err, **context)
168
return self._client.call(method, *args)
191
170
def _call_with_body_bytes(self, method, args, body):
192
171
"""Call a method on the remote server with body bytes."""
194
return self._client.call_with_body_bytes(method, args, body)
195
except errors.ErrorFromSmartServer, err:
196
# The first argument, if present, is always a path.
198
context = {'relpath': args[0]}
201
self._translate_error(err, **context)
172
return self._client.call_with_body_bytes(method, args, body)
203
174
def has(self, relpath):
204
175
"""Indicate whether a remote file of the given name exists or not.
211
182
elif resp == ('no', ):
214
raise errors.UnexpectedSmartServerResponse(resp)
185
self._translate_error(resp)
216
187
def get(self, relpath):
217
188
"""Return file-like object reading the contents of a remote file.
219
190
:see: Transport.get_bytes()/get_file()
221
192
return StringIO(self.get_bytes(relpath))
223
194
def get_bytes(self, relpath):
224
195
remote = self._remote_path(relpath)
226
resp, response_handler = self._client.call_expecting_body('get', remote)
227
except errors.ErrorFromSmartServer, err:
228
self._translate_error(err, relpath)
196
request = self.get_smart_medium().get_request()
197
smart_protocol = protocol.SmartClientRequestProtocolOne(request)
198
smart_protocol.call('get', remote)
199
resp = smart_protocol.read_response_tuple(True)
229
200
if resp != ('ok', ):
230
response_handler.cancel_read_body()
231
raise errors.UnexpectedSmartServerResponse(resp)
232
return response_handler.read_body_bytes()
201
smart_protocol.cancel_read_body()
202
self._translate_error(resp, relpath)
203
return smart_protocol.read_body_bytes()
234
205
def _serialise_optional_mode(self, mode):
309
280
if resp[0] == 'appended':
310
281
return int(resp[1])
311
raise errors.UnexpectedSmartServerResponse(resp)
282
self._translate_error(resp)
313
284
def delete(self, relpath):
314
285
resp = self._call2('delete', self._remote_path(relpath))
315
self._ensure_ok(resp)
286
self._translate_error(resp)
317
288
def external_url(self):
318
289
"""See bzrlib.transport.Transport.external_url."""
319
290
# the external path for RemoteTransports is the base
322
def recommended_page_size(self):
323
"""Return the recommended page size for this transport."""
326
def _readv(self, relpath, offsets):
293
def readv(self, relpath, offsets):
330
297
offsets = list(offsets)
332
299
sorted_offsets = sorted(offsets)
300
# turn the list of offsets into a stack
301
offset_stack = iter(offsets)
302
cur_offset_and_size = offset_stack.next()
333
303
coalesced = list(self._coalesce_offsets(sorted_offsets,
334
304
limit=self._max_readv_combine,
335
fudge_factor=self._bytes_to_read_before_seek,
336
max_size=self._max_readv_bytes))
338
# now that we've coallesced things, avoid making enormous requests
343
if c.length + cur_len > self._max_readv_bytes:
344
requests.append(cur_request)
348
cur_request.append(c)
351
requests.append(cur_request)
352
if 'hpss' in debug.debug_flags:
353
trace.mutter('%s.readv %s offsets => %s coalesced'
354
' => %s requests (%s)',
355
self.__class__.__name__, len(offsets), len(coalesced),
356
len(requests), sum(map(len, requests)))
305
fudge_factor=self._bytes_to_read_before_seek))
307
request = self.get_smart_medium().get_request()
308
smart_protocol = protocol.SmartClientRequestProtocolOne(request)
309
smart_protocol.call_with_body_readv_array(
310
('readv', self._remote_path(relpath)),
311
[(c.start, c.length) for c in coalesced])
312
resp = smart_protocol.read_response_tuple(True)
314
if resp[0] != 'readv':
315
# This should raise an exception
316
smart_protocol.cancel_read_body()
317
self._translate_error(resp)
320
# FIXME: this should know how many bytes are needed, for clarity.
321
data = smart_protocol.read_body_bytes()
357
322
# Cache the results, but only until they have been fulfilled
359
# turn the list of offsets into a single stack to iterate
360
offset_stack = iter(offsets)
361
# using a list so it can be modified when passing down and coming back
362
next_offset = [offset_stack.next()]
363
for cur_request in requests:
365
result = self._client.call_with_body_readv_array(
366
('readv', self._remote_path(relpath),),
367
[(c.start, c.length) for c in cur_request])
368
resp, response_handler = result
369
except errors.ErrorFromSmartServer, err:
370
self._translate_error(err, relpath)
372
if resp[0] != 'readv':
373
# This should raise an exception
374
response_handler.cancel_read_body()
375
raise errors.UnexpectedSmartServerResponse(resp)
377
for res in self._handle_response(offset_stack, cur_request,
383
def _handle_response(self, offset_stack, coalesced, response_handler,
384
data_map, next_offset):
385
cur_offset_and_size = next_offset[0]
386
# FIXME: this should know how many bytes are needed, for clarity.
387
data = response_handler.read_body_bytes()
389
324
for c_offset in coalesced:
390
325
if len(data) < c_offset.length:
391
326
raise errors.ShortReadvError(relpath, c_offset.start,
392
327
c_offset.length, actual=len(data))
393
328
for suboffset, subsize in c_offset.ranges:
394
329
key = (c_offset.start+suboffset, subsize)
395
this_data = data[data_offset+suboffset:
396
data_offset+suboffset+subsize]
397
# Special case when the data is in-order, rather than packing
398
# into a map and then back out again. Benchmarking shows that
399
# this has 100% hit rate, but leave in the data_map work just
401
# TODO: Could we get away with using buffer() to avoid the
402
# memory copy? Callers would need to realize they may
403
# not have a real string.
404
if key == cur_offset_and_size:
405
yield cur_offset_and_size[0], this_data
406
cur_offset_and_size = next_offset[0] = offset_stack.next()
408
data_map[key] = this_data
409
data_offset += c_offset.length
330
data_map[key] = data[suboffset:suboffset+subsize]
331
data = data[c_offset.length:]
411
333
# Now that we've read some data, see if we can yield anything back
412
334
while cur_offset_and_size in data_map:
413
335
this_data = data_map.pop(cur_offset_and_size)
414
336
yield cur_offset_and_size[0], this_data
415
cur_offset_and_size = next_offset[0] = offset_stack.next()
337
cur_offset_and_size = offset_stack.next()
417
339
def rename(self, rel_from, rel_to):
418
340
self._call('rename',
427
349
def rmdir(self, relpath):
428
350
resp = self._call('rmdir', self._remote_path(relpath))
430
def _ensure_ok(self, resp):
432
raise errors.UnexpectedSmartServerResponse(resp)
434
def _translate_error(self, err, relpath=None):
435
remote._translate_error(err, path=relpath)
352
def _translate_error(self, resp, orig_path=None):
353
"""Raise an exception from a response"""
360
elif what == 'NoSuchFile':
361
if orig_path is not None:
362
error_path = orig_path
365
raise errors.NoSuchFile(error_path)
366
elif what == 'error':
367
raise errors.SmartProtocolError(unicode(resp[1]))
368
elif what == 'FileExists':
369
raise errors.FileExists(resp[1])
370
elif what == 'DirectoryNotEmpty':
371
raise errors.DirectoryNotEmpty(resp[1])
372
elif what == 'ShortReadvError':
373
raise errors.ShortReadvError(resp[1], int(resp[2]),
374
int(resp[3]), int(resp[4]))
375
elif what in ('UnicodeEncodeError', 'UnicodeDecodeError'):
376
encoding = str(resp[1]) # encoding must always be a string
380
reason = str(resp[5]) # reason must always be a string
381
if val.startswith('u:'):
382
val = val[2:].decode('utf-8')
383
elif val.startswith('s:'):
384
val = val[2:].decode('base64')
385
if what == 'UnicodeDecodeError':
386
raise UnicodeDecodeError(encoding, val, start, end, reason)
387
elif what == 'UnicodeEncodeError':
388
raise UnicodeEncodeError(encoding, val, start, end, reason)
389
elif what == "ReadOnlyError":
390
raise errors.TransportNotPossible('readonly transport')
391
elif what == "ReadError":
392
if orig_path is not None:
393
error_path = orig_path
396
raise errors.ReadError(error_path)
398
raise errors.SmartProtocolError('unexpected smart server error: %r' % (resp,))
437
400
def disconnect(self):
438
401
self.get_smart_medium().disconnect()
403
def delete_tree(self, relpath):
404
raise errors.TransportNotPossible('readonly transport')
440
406
def stat(self, relpath):
441
407
resp = self._call2('stat', self._remote_path(relpath))
442
408
if resp[0] == 'stat':
443
409
return _SmartStat(int(resp[1]), int(resp[2], 8))
444
raise errors.UnexpectedSmartServerResponse(resp)
411
self._translate_error(resp)
446
413
## def lock_read(self, relpath):
447
414
## """Lock the given file for shared (read) access.
463
430
resp = self._call2('list_dir', self._remote_path(relpath))
464
431
if resp[0] == 'names':
465
432
return [name.encode('ascii') for name in resp[1:]]
466
raise errors.UnexpectedSmartServerResponse(resp)
434
self._translate_error(resp)
468
436
def iter_files_recursive(self):
469
437
resp = self._call2('iter_files_recursive', self._remote_path(''))
470
438
if resp[0] == 'names':
472
raise errors.UnexpectedSmartServerResponse(resp)
441
self._translate_error(resp)
475
444
class RemoteTCPTransport(RemoteTransport):
476
445
"""Connection to smart server over plain tcp.
478
447
This is essentially just a factory to get 'RemoteTransport(url,
479
448
SmartTCPClientMedium).
482
451
def _build_medium(self):
483
client_medium = medium.SmartTCPClientMedium(
484
self._host, self._port, self.base)
485
return client_medium, None
488
class RemoteTCPTransportV2Only(RemoteTransport):
489
"""Connection to smart server over plain tcp with the client hard-coded to
490
assume protocol v2 and remote server version <= 1.6.
492
This should only be used for testing.
495
def _build_medium(self):
496
client_medium = medium.SmartTCPClientMedium(
497
self._host, self._port, self.base)
498
client_medium._protocol_version = 2
499
client_medium._remember_remote_is_before((1, 6))
500
return client_medium, None
452
assert self.base.startswith('bzr://')
453
if self._port is None:
454
self._port = BZR_DEFAULT_PORT
455
return medium.SmartTCPClientMedium(self._host, self._port), None
503
458
class RemoteSSHTransport(RemoteTransport):
510
465
def _build_medium(self):
511
location_config = config.LocationConfig(self.base)
512
bzr_remote_path = location_config.get_bzr_remote_path()
515
auth = config.AuthenticationConfig()
516
user = auth.get_user('ssh', self._host, self._port)
517
client_medium = medium.SmartSSHClientMedium(self._host, self._port,
518
user, self._password, self.base,
519
bzr_remote_path=bzr_remote_path)
520
return client_medium, (user, self._password)
466
assert self.base.startswith('bzr+ssh://')
467
# ssh will prompt the user for a password if needed and if none is
468
# provided but it will not give it back, so no credentials can be
470
return medium.SmartSSHClientMedium(self._host, self._port,
471
self._user, self._password), None
523
474
class RemoteHTTPTransport(RemoteTransport):
524
475
"""Just a way to connect between a bzr+http:// url and http://.
526
477
This connection operates slightly differently than the RemoteSSHTransport.
527
478
It uses a plain http:// transport underneath, which defines what remote
528
479
.bzr/smart URL we are connected to. From there, all paths that are sent are
568
521
smart requests may be different). This is so that the server doesn't
569
522
have to handle .bzr/smart requests at arbitrary places inside .bzr
570
523
directories, just at the initial URL the user uses.
525
The exception is parent paths (i.e. relative_url of "..").
573
528
abs_url = self.abspath(relative_url)
575
530
abs_url = self.base
531
# We either use the exact same http_transport (for child locations), or
532
# a clone of the underlying http_transport (for parent locations). This
533
# means we share the connection.
534
norm_base = urlutils.normalize_url(self.base)
535
norm_abs_url = urlutils.normalize_url(abs_url)
536
normalized_rel_url = urlutils.relative_url(norm_base, norm_abs_url)
537
if normalized_rel_url == ".." or normalized_rel_url.startswith("../"):
538
http_transport = self._http_transport.clone(normalized_rel_url)
540
http_transport = self._http_transport
576
541
return RemoteHTTPTransport(abs_url,
577
542
_from_transport=self,
578
http_transport=self._http_transport)
580
def _redirected_to(self, source, target):
581
"""See transport._redirected_to"""
582
redirected = self._http_transport._redirected_to(source, target)
583
if (redirected is not None
584
and isinstance(redirected, type(self._http_transport))):
585
return RemoteHTTPTransport('bzr+' + redirected.external_url(),
586
http_transport=redirected)
588
# Either None or a transport for a different protocol
592
class HintingSSHTransport(transport.Transport):
593
"""Simple transport that handles ssh:// and points out bzr+ssh://."""
595
def __init__(self, url):
596
raise errors.UnsupportedProtocol(url,
597
'bzr supports bzr+ssh to operate over ssh, use "bzr+%s".' % url)
543
http_transport=http_transport)
600
546
def get_test_permutations():
601
547
"""Return (transport, server) permutations for testing."""
602
548
### We may need a little more test framework support to construct an
603
549
### appropriate RemoteTransport in the future.
604
from bzrlib.tests import test_server
605
return [(RemoteTCPTransport, test_server.SmartTCPServer_for_testing)]
550
from bzrlib.smart import server
551
return [(RemoteTCPTransport, server.SmartTCPServer_for_testing)]
added
removed
bzrlib/transport/remote.py
