1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
|
# Copyright (C) 2006, 2007 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""VFS operations for the smart server.
This module defines the smart server methods that are low-level file operations
-- i.e. methods that operate directly on files and directories, rather than
higher-level concepts like branches and revisions.
These methods, plus 'hello' and 'get_bundle', are version 1 of the smart server
protocol, as implemented in bzr 0.11 and later.
"""
import os
from bzrlib import errors
from bzrlib.smart import request
def _deserialise_optional_mode(mode):
# XXX: FIXME this should be on the protocol object. Later protocol versions
# might serialise modes differently.
if mode == '':
return None
else:
return int(mode)
def vfs_enabled():
"""Is the VFS enabled ?
the VFS is disabled when the BZR_NO_SMART_VFS environment variable is set.
:return: True if it is enabled.
"""
return not 'BZR_NO_SMART_VFS' in os.environ
class VfsRequest(request.SmartServerRequest):
"""Base class for VFS requests.
VFS requests are disabled if vfs_enabled() returns False.
"""
def _check_enabled(self):
if not vfs_enabled():
raise errors.DisabledMethod(self.__class__.__name__)
class HasRequest(VfsRequest):
def do(self, relpath):
relpath = self.translate_client_path(relpath)
r = self._backing_transport.has(relpath) and 'yes' or 'no'
return request.SuccessfulSmartServerResponse((r,))
class GetRequest(VfsRequest):
def do(self, relpath):
relpath = self.translate_client_path(relpath)
try:
backing_bytes = self._backing_transport.get_bytes(relpath)
except errors.ReadError:
# cannot read the file
return request.FailedSmartServerResponse(('ReadError', ))
except errors.PermissionDenied:
return request.FailedSmartServerResponse(('PermissionDenied',))
return request.SuccessfulSmartServerResponse(('ok',), backing_bytes)
class AppendRequest(VfsRequest):
def do(self, relpath, mode):
relpath = self.translate_client_path(relpath)
self._relpath = relpath
self._mode = _deserialise_optional_mode(mode)
def do_body(self, body_bytes):
old_length = self._backing_transport.append_bytes(
self._relpath, body_bytes, self._mode)
return request.SuccessfulSmartServerResponse(('appended', '%d' % old_length))
class DeleteRequest(VfsRequest):
def do(self, relpath):
relpath = self.translate_client_path(relpath)
self._backing_transport.delete(relpath)
return request.SuccessfulSmartServerResponse(('ok', ))
class IterFilesRecursiveRequest(VfsRequest):
def do(self, relpath):
if not relpath.endswith('/'):
relpath += '/'
relpath = self.translate_client_path(relpath)
transport = self._backing_transport.clone(relpath)
filenames = transport.iter_files_recursive()
return request.SuccessfulSmartServerResponse(('names',) + tuple(filenames))
class ListDirRequest(VfsRequest):
def do(self, relpath):
if not relpath.endswith('/'):
relpath += '/'
relpath = self.translate_client_path(relpath)
filenames = self._backing_transport.list_dir(relpath)
return request.SuccessfulSmartServerResponse(('names',) + tuple(filenames))
class MkdirRequest(VfsRequest):
def do(self, relpath, mode):
relpath = self.translate_client_path(relpath)
self._backing_transport.mkdir(relpath,
_deserialise_optional_mode(mode))
return request.SuccessfulSmartServerResponse(('ok',))
class MoveRequest(VfsRequest):
def do(self, rel_from, rel_to):
rel_from = self.translate_client_path(rel_from)
rel_to = self.translate_client_path(rel_to)
self._backing_transport.move(rel_from, rel_to)
return request.SuccessfulSmartServerResponse(('ok',))
class PutRequest(VfsRequest):
def do(self, relpath, mode):
relpath = self.translate_client_path(relpath)
self._relpath = relpath
self._mode = _deserialise_optional_mode(mode)
def do_body(self, body_bytes):
self._backing_transport.put_bytes(self._relpath, body_bytes, self._mode)
return request.SuccessfulSmartServerResponse(('ok',))
class PutNonAtomicRequest(VfsRequest):
def do(self, relpath, mode, create_parent, dir_mode):
relpath = self.translate_client_path(relpath)
self._relpath = relpath
self._dir_mode = _deserialise_optional_mode(dir_mode)
self._mode = _deserialise_optional_mode(mode)
# a boolean would be nicer XXX
self._create_parent = (create_parent == 'T')
def do_body(self, body_bytes):
self._backing_transport.put_bytes_non_atomic(self._relpath,
body_bytes,
mode=self._mode,
create_parent_dir=self._create_parent,
dir_mode=self._dir_mode)
return request.SuccessfulSmartServerResponse(('ok',))
class ReadvRequest(VfsRequest):
def do(self, relpath):
relpath = self.translate_client_path(relpath)
self._relpath = relpath
def do_body(self, body_bytes):
"""accept offsets for a readv request."""
offsets = self._deserialise_offsets(body_bytes)
backing_bytes = ''.join(bytes for offset, bytes in
self._backing_transport.readv(self._relpath, offsets))
return request.SuccessfulSmartServerResponse(('readv',), backing_bytes)
def _deserialise_offsets(self, text):
# XXX: FIXME this should be on the protocol object.
offsets = []
for line in text.split('\n'):
if not line:
continue
start, length = line.split(',')
offsets.append((int(start), int(length)))
return offsets
class RenameRequest(VfsRequest):
def do(self, rel_from, rel_to):
rel_from = self.translate_client_path(rel_from)
rel_to = self.translate_client_path(rel_to)
self._backing_transport.rename(rel_from, rel_to)
return request.SuccessfulSmartServerResponse(('ok', ))
class RmdirRequest(VfsRequest):
def do(self, relpath):
relpath = self.translate_client_path(relpath)
self._backing_transport.rmdir(relpath)
return request.SuccessfulSmartServerResponse(('ok', ))
class StatRequest(VfsRequest):
def do(self, relpath):
if not relpath.endswith('/'):
relpath += '/'
relpath = self.translate_client_path(relpath)
stat = self._backing_transport.stat(relpath)
return request.SuccessfulSmartServerResponse(
('stat', str(stat.st_size), oct(stat.st_mode)))
|