1
# Copyright (C) 2006, 2007 Canonical Ltd
3
# This program is free software; you can redistribute it and/or modify
4
# it under the terms of the GNU General Public License as published by
5
# the Free Software Foundation; either version 2 of the License, or
6
# (at your option) any later version.
8
# This program is distributed in the hope that it will be useful,
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11
# GNU General Public License for more details.
13
# You should have received a copy of the GNU General Public License
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17
"""VFS operations for the smart server.
19
This module defines the smart server methods that are low-level file operations
20
-- i.e. methods that operate directly on files and directories, rather than
21
higher-level concepts like branches and revisions.
23
These methods, plus 'hello' and 'get_bundle', are version 1 of the smart server
24
protocol, as implemented in bzr 0.11 and later.
29
from bzrlib import errors
30
from bzrlib.smart import request
33
def _deserialise_optional_mode(mode):
34
# XXX: FIXME this should be on the protocol object. Later protocol versions
35
# might serialise modes differently.
43
"""Is the VFS enabled ?
45
the VFS is disabled when the BZR_NO_SMART_VFS environment variable is set.
47
:return: True if it is enabled.
49
return not 'BZR_NO_SMART_VFS' in os.environ
52
class VfsRequest(request.SmartServerRequest):
53
"""Base class for VFS requests.
55
VFS requests are disabled if vfs_enabled() returns False.
58
def _check_enabled(self):
60
raise errors.DisabledMethod(self.__class__.__name__)
63
class HasRequest(VfsRequest):
65
def do(self, relpath):
66
r = self._backing_transport.has(relpath) and 'yes' or 'no'
67
return request.SuccessfulSmartServerResponse((r,))
70
class GetRequest(VfsRequest):
72
def do(self, relpath):
74
backing_bytes = self._backing_transport.get_bytes(relpath)
75
except errors.ReadError:
76
# cannot read the file
77
return request.FailedSmartServerResponse(('ReadError', ))
78
except errors.PermissionDenied:
79
return request.FailedSmartServerResponse(('PermissionDenied',))
80
return request.SuccessfulSmartServerResponse(('ok',), backing_bytes)
83
class AppendRequest(VfsRequest):
85
def do(self, relpath, mode):
86
self._relpath = relpath
87
self._mode = _deserialise_optional_mode(mode)
89
def do_body(self, body_bytes):
90
old_length = self._backing_transport.append_bytes(
91
self._relpath, body_bytes, self._mode)
92
return request.SuccessfulSmartServerResponse(('appended', '%d' % old_length))
95
class DeleteRequest(VfsRequest):
97
def do(self, relpath):
98
self._backing_transport.delete(relpath)
99
return request.SuccessfulSmartServerResponse(('ok', ))
102
class IterFilesRecursiveRequest(VfsRequest):
104
def do(self, relpath):
105
transport = self._backing_transport.clone(relpath)
106
filenames = transport.iter_files_recursive()
107
return request.SuccessfulSmartServerResponse(('names',) + tuple(filenames))
110
class ListDirRequest(VfsRequest):
112
def do(self, relpath):
113
filenames = self._backing_transport.list_dir(relpath)
114
return request.SuccessfulSmartServerResponse(('names',) + tuple(filenames))
117
class MkdirRequest(VfsRequest):
119
def do(self, relpath, mode):
120
self._backing_transport.mkdir(relpath,
121
_deserialise_optional_mode(mode))
122
return request.SuccessfulSmartServerResponse(('ok',))
125
class MoveRequest(VfsRequest):
127
def do(self, rel_from, rel_to):
128
self._backing_transport.move(rel_from, rel_to)
129
return request.SuccessfulSmartServerResponse(('ok',))
132
class PutRequest(VfsRequest):
134
def do(self, relpath, mode):
135
self._relpath = relpath
136
self._mode = _deserialise_optional_mode(mode)
138
def do_body(self, body_bytes):
139
self._backing_transport.put_bytes(self._relpath, body_bytes, self._mode)
140
return request.SuccessfulSmartServerResponse(('ok',))
143
class PutNonAtomicRequest(VfsRequest):
145
def do(self, relpath, mode, create_parent, dir_mode):
146
self._relpath = relpath
147
self._dir_mode = _deserialise_optional_mode(dir_mode)
148
self._mode = _deserialise_optional_mode(mode)
149
# a boolean would be nicer XXX
150
self._create_parent = (create_parent == 'T')
152
def do_body(self, body_bytes):
153
self._backing_transport.put_bytes_non_atomic(self._relpath,
156
create_parent_dir=self._create_parent,
157
dir_mode=self._dir_mode)
158
return request.SuccessfulSmartServerResponse(('ok',))
161
class ReadvRequest(VfsRequest):
163
def do(self, relpath):
164
self._relpath = relpath
166
def do_body(self, body_bytes):
167
"""accept offsets for a readv request."""
168
offsets = self._deserialise_offsets(body_bytes)
169
backing_bytes = ''.join(bytes for offset, bytes in
170
self._backing_transport.readv(self._relpath, offsets))
171
return request.SuccessfulSmartServerResponse(('readv',), backing_bytes)
173
def _deserialise_offsets(self, text):
174
# XXX: FIXME this should be on the protocol object.
176
for line in text.split('\n'):
179
start, length = line.split(',')
180
offsets.append((int(start), int(length)))
184
class RenameRequest(VfsRequest):
186
def do(self, rel_from, rel_to):
187
self._backing_transport.rename(rel_from, rel_to)
188
return request.SuccessfulSmartServerResponse(('ok', ))
191
class RmdirRequest(VfsRequest):
193
def do(self, relpath):
194
self._backing_transport.rmdir(relpath)
195
return request.SuccessfulSmartServerResponse(('ok', ))
198
class StatRequest(VfsRequest):
200
def do(self, relpath):
201
stat = self._backing_transport.stat(relpath)
202
return request.SuccessfulSmartServerResponse(
203
('stat', str(stat.st_size), oct(stat.st_mode)))
added
removed
bzrlib/smart/vfs.py
