83
77
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.
80
:param medium: The medium to use for this RemoteTransport. This must be
81
supplied if _from_transport is None.
91
83
:param _client: Override the _SmartClient used by this transport. This
92
84
should only be used for testing purposes; normally this is
93
85
determined from the medium.
95
super(RemoteTransport, self).__init__(
96
url, _from_transport=_from_transport)
87
super(RemoteTransport, self).__init__(url,
88
_from_transport=_from_transport)
98
90
# The medium is the connection, except when we need to share it with
99
91
# other objects (RemoteBzrDir, RemoteRepository etc). In these cases
100
92
# 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:
94
if _from_transport is None:
106
95
# If no _from_transport is specified, we need to intialize the
108
97
credentials = None
168
146
def get_smart_medium(self):
169
147
return self._get_connection()
149
@deprecated_method(one_four)
150
def get_shared_medium(self):
151
return self._get_shared_connection()
171
153
def _remote_path(self, relpath):
172
154
"""Returns the Unicode version of the absolute path for relpath."""
173
155
return self._combine_paths(self._path, relpath)
175
157
def _call(self, method, *args):
176
resp = self._call2(method, *args)
177
self._ensure_ok(resp)
159
resp = self._call2(method, *args)
160
except errors.ErrorFromSmartServer, err:
161
self._translate_error(err.error_tuple)
162
self._translate_error(resp)
179
164
def _call2(self, method, *args):
180
165
"""Call a method on the remote server."""
182
167
return self._client.call(method, *args)
183
168
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)
169
self._translate_error(err.error_tuple)
191
171
def _call_with_body_bytes(self, method, args, body):
192
172
"""Call a method on the remote server with body bytes."""
194
174
return self._client.call_with_body_bytes(method, args, body)
195
175
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)
176
self._translate_error(err.error_tuple)
203
178
def has(self, relpath):
204
179
"""Indicate whether a remote file of the given name exists or not.
330
306
offsets = list(offsets)
332
308
sorted_offsets = sorted(offsets)
309
# turn the list of offsets into a stack
310
offset_stack = iter(offsets)
311
cur_offset_and_size = offset_stack.next()
333
312
coalesced = list(self._coalesce_offsets(sorted_offsets,
334
313
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)))
314
fudge_factor=self._bytes_to_read_before_seek))
317
result = self._client.call_with_body_readv_array(
318
('readv', self._remote_path(relpath),),
319
[(c.start, c.length) for c in coalesced])
320
resp, response_handler = result
321
except errors.ErrorFromSmartServer, err:
322
self._translate_error(err.error_tuple)
324
if resp[0] != 'readv':
325
# This should raise an exception
326
response_handler.cancel_read_body()
327
raise errors.UnexpectedSmartServerResponse(resp)
329
# FIXME: this should know how many bytes are needed, for clarity.
330
data = response_handler.read_body_bytes()
357
331
# 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
333
for c_offset in coalesced:
390
334
if len(data) < c_offset.length:
391
335
raise errors.ShortReadvError(relpath, c_offset.start,
392
336
c_offset.length, actual=len(data))
393
337
for suboffset, subsize in c_offset.ranges:
394
338
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
339
data_map[key] = data[suboffset:suboffset+subsize]
340
data = data[c_offset.length:]
411
342
# Now that we've read some data, see if we can yield anything back
412
343
while cur_offset_and_size in data_map:
413
344
this_data = data_map.pop(cur_offset_and_size)
414
345
yield cur_offset_and_size[0], this_data
415
cur_offset_and_size = next_offset[0] = offset_stack.next()
346
cur_offset_and_size = offset_stack.next()
417
348
def rename(self, rel_from, rel_to):
418
349
self._call('rename',
427
358
def rmdir(self, relpath):
428
359
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)
361
def _translate_error(self, resp, orig_path=None):
362
"""Raise an exception from a response"""
369
elif what == 'NoSuchFile':
370
if orig_path is not None:
371
error_path = orig_path
374
raise errors.NoSuchFile(error_path)
375
elif what == 'error':
376
raise errors.SmartProtocolError(unicode(resp[1]))
377
elif what == 'FileExists':
378
raise errors.FileExists(resp[1])
379
elif what == 'DirectoryNotEmpty':
380
raise errors.DirectoryNotEmpty(resp[1])
381
elif what == 'ShortReadvError':
382
raise errors.ShortReadvError(resp[1], int(resp[2]),
383
int(resp[3]), int(resp[4]))
384
elif what in ('UnicodeEncodeError', 'UnicodeDecodeError'):
385
encoding = str(resp[1]) # encoding must always be a string
389
reason = str(resp[5]) # reason must always be a string
390
if val.startswith('u:'):
391
val = val[2:].decode('utf-8')
392
elif val.startswith('s:'):
393
val = val[2:].decode('base64')
394
if what == 'UnicodeDecodeError':
395
raise UnicodeDecodeError(encoding, val, start, end, reason)
396
elif what == 'UnicodeEncodeError':
397
raise UnicodeEncodeError(encoding, val, start, end, reason)
398
elif what == "ReadOnlyError":
399
raise errors.TransportNotPossible('readonly transport')
400
elif what == "ReadError":
401
if orig_path is not None:
402
error_path = orig_path
405
raise errors.ReadError(error_path)
406
elif what == "PermissionDenied":
407
if orig_path is not None:
408
error_path = orig_path
411
raise errors.PermissionDenied(error_path)
413
raise errors.SmartProtocolError('unexpected smart server error: %r' % (resp,))
437
415
def disconnect(self):
438
416
self.get_smart_medium().disconnect()
418
def delete_tree(self, relpath):
419
raise errors.TransportNotPossible('readonly transport')
440
421
def stat(self, relpath):
441
422
resp = self._call2('stat', self._remote_path(relpath))
442
423
if resp[0] == 'stat':
443
424
return _SmartStat(int(resp[1]), int(resp[2], 8))
444
raise errors.UnexpectedSmartServerResponse(resp)
426
self._translate_error(resp)
446
428
## def lock_read(self, relpath):
447
429
## """Lock the given file for shared (read) access.
463
445
resp = self._call2('list_dir', self._remote_path(relpath))
464
446
if resp[0] == 'names':
465
447
return [name.encode('ascii') for name in resp[1:]]
466
raise errors.UnexpectedSmartServerResponse(resp)
449
self._translate_error(resp)
468
451
def iter_files_recursive(self):
469
452
resp = self._call2('iter_files_recursive', self._remote_path(''))
470
453
if resp[0] == 'names':
472
raise errors.UnexpectedSmartServerResponse(resp)
456
self._translate_error(resp)
475
459
class RemoteTCPTransport(RemoteTransport):
476
460
"""Connection to smart server over plain tcp.
478
462
This is essentially just a factory to get 'RemoteTransport(url,
479
463
SmartTCPClientMedium).
482
466
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
467
return medium.SmartTCPClientMedium(self._host, self._port), None
503
470
class RemoteSSHTransport(RemoteTransport):
510
477
def _build_medium(self):
478
# ssh will prompt the user for a password if needed and if none is
479
# provided but it will not give it back, so no credentials can be
511
481
location_config = config.LocationConfig(self.base)
512
482
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)
483
return medium.SmartSSHClientMedium(self._host, self._port,
484
self._user, self._password, bzr_remote_path=bzr_remote_path), None
523
487
class RemoteHTTPTransport(RemoteTransport):
524
488
"""Just a way to connect between a bzr+http:// url and http://.
526
490
This connection operates slightly differently than the RemoteSSHTransport.
527
491
It uses a plain http:// transport underneath, which defines what remote
528
492
.bzr/smart URL we are connected to. From there, all paths that are sent are
577
541
_from_transport=self,
578
542
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)
600
545
def get_test_permutations():
601
546
"""Return (transport, server) permutations for testing."""
602
547
### We may need a little more test framework support to construct an
603
548
### appropriate RemoteTransport in the future.
604
from bzrlib.tests import test_server
605
return [(RemoteTCPTransport, test_server.SmartTCPServer_for_testing)]
549
from bzrlib.smart import server
550
return [(RemoteTCPTransport, server.SmartTCPServer_for_testing)]