root / pithos / backends / simple.py @ 17629fea
History | View | Annotate | Download (37.9 kB)
1 |
# Copyright 2011 GRNET S.A. All rights reserved.
|
---|---|
2 |
#
|
3 |
# Redistribution and use in source and binary forms, with or
|
4 |
# without modification, are permitted provided that the following
|
5 |
# conditions are met:
|
6 |
#
|
7 |
# 1. Redistributions of source code must retain the above
|
8 |
# copyright notice, this list of conditions and the following
|
9 |
# disclaimer.
|
10 |
#
|
11 |
# 2. Redistributions in binary form must reproduce the above
|
12 |
# copyright notice, this list of conditions and the following
|
13 |
# disclaimer in the documentation and/or other materials
|
14 |
# provided with the distribution.
|
15 |
#
|
16 |
# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
|
17 |
# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
18 |
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
19 |
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
|
20 |
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
21 |
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
22 |
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
23 |
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
24 |
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
25 |
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
26 |
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
27 |
# POSSIBILITY OF SUCH DAMAGE.
|
28 |
#
|
29 |
# The views and conclusions contained in the software and
|
30 |
# documentation are those of the authors and should not be
|
31 |
# interpreted as representing official policies, either expressed
|
32 |
# or implied, of GRNET S.A.
|
33 |
|
34 |
import os |
35 |
import time |
36 |
import sqlite3 |
37 |
import logging |
38 |
import hashlib |
39 |
import binascii |
40 |
|
41 |
from base import NotAllowedError, BaseBackend |
42 |
from pithos.lib.hashfiler import Mapper, Blocker |
43 |
|
44 |
|
45 |
logger = logging.getLogger(__name__) |
46 |
|
47 |
|
48 |
class SimpleBackend(BaseBackend): |
49 |
"""A simple backend.
|
50 |
|
51 |
Uses SQLite for storage.
|
52 |
"""
|
53 |
|
54 |
def __init__(self, db): |
55 |
self.hash_algorithm = 'sha256' |
56 |
self.block_size = 4 * 1024 * 1024 # 4MB |
57 |
|
58 |
self.default_policy = {'quota': 0, 'versioning': 'auto'} |
59 |
|
60 |
basepath = os.path.split(db)[0]
|
61 |
if basepath and not os.path.exists(basepath): |
62 |
os.makedirs(basepath) |
63 |
if not os.path.isdir(basepath): |
64 |
raise RuntimeError("Cannot open database at '%s'" % (db,)) |
65 |
|
66 |
self.con = sqlite3.connect(basepath + '/db', check_same_thread=False) |
67 |
|
68 |
sql = '''pragma foreign_keys = on'''
|
69 |
self.con.execute(sql)
|
70 |
|
71 |
sql = '''create table if not exists versions (
|
72 |
version_id integer primary key,
|
73 |
name text,
|
74 |
user text,
|
75 |
tstamp integer not null,
|
76 |
size integer default 0,
|
77 |
hide integer default 0)'''
|
78 |
self.con.execute(sql)
|
79 |
sql = '''create table if not exists metadata (
|
80 |
version_id integer,
|
81 |
key text,
|
82 |
value text,
|
83 |
primary key (version_id, key)
|
84 |
foreign key (version_id) references versions(version_id)
|
85 |
on delete cascade)'''
|
86 |
self.con.execute(sql)
|
87 |
sql = '''create table if not exists policy (
|
88 |
name text, key text, value text, primary key (name, key))'''
|
89 |
self.con.execute(sql)
|
90 |
|
91 |
# Access control tables.
|
92 |
sql = '''create table if not exists groups (
|
93 |
account text, gname text, user text)'''
|
94 |
self.con.execute(sql)
|
95 |
sql = '''create table if not exists permissions (
|
96 |
name text, op text, user text)'''
|
97 |
self.con.execute(sql)
|
98 |
sql = '''create table if not exists public (
|
99 |
name text, primary key (name))'''
|
100 |
self.con.execute(sql)
|
101 |
|
102 |
self.con.commit()
|
103 |
|
104 |
params = {'blocksize': self.block_size, |
105 |
'blockpath': basepath + '/blocks', |
106 |
'hashtype': self.hash_algorithm} |
107 |
self.blocker = Blocker(**params)
|
108 |
|
109 |
params = {'mappath': basepath + '/maps', |
110 |
'namelen': self.blocker.hashlen} |
111 |
self.mapper = Mapper(**params)
|
112 |
|
113 |
def get_account_meta(self, user, account, until=None): |
114 |
"""Return a dictionary with the account metadata."""
|
115 |
|
116 |
logger.debug("get_account_meta: %s %s", account, until)
|
117 |
if user != account:
|
118 |
raise NotAllowedError
|
119 |
try:
|
120 |
version_id, mtime = self._get_accountinfo(account, until)
|
121 |
except NameError: |
122 |
version_id = None
|
123 |
mtime = 0
|
124 |
count, bytes, tstamp = self._get_pathstats(account, until) |
125 |
if mtime > tstamp:
|
126 |
tstamp = mtime |
127 |
if until is None: |
128 |
modified = tstamp |
129 |
else:
|
130 |
modified = self._get_pathstats(account)[2] # Overall last modification |
131 |
if mtime > modified:
|
132 |
modified = mtime |
133 |
|
134 |
# Proper count.
|
135 |
sql = 'select count(name) from (%s) where name glob ? and not name glob ?'
|
136 |
sql = sql % self._sql_until(until)
|
137 |
c = self.con.execute(sql, (account + '/*', account + '/*/*')) |
138 |
row = c.fetchone() |
139 |
count = row[0]
|
140 |
|
141 |
meta = self._get_metadata(account, version_id)
|
142 |
meta.update({'name': account, 'count': count, 'bytes': bytes}) |
143 |
if modified:
|
144 |
meta.update({'modified': modified})
|
145 |
if until is not None: |
146 |
meta.update({'until_timestamp': tstamp})
|
147 |
return meta
|
148 |
|
149 |
def update_account_meta(self, user, account, meta, replace=False): |
150 |
"""Update the metadata associated with the account."""
|
151 |
|
152 |
logger.debug("update_account_meta: %s %s %s", account, meta, replace)
|
153 |
if user != account:
|
154 |
raise NotAllowedError
|
155 |
self._put_metadata(user, account, meta, replace, False) |
156 |
|
157 |
def get_account_groups(self, user, account): |
158 |
"""Return a dictionary with the user groups defined for this account."""
|
159 |
|
160 |
logger.debug("get_account_groups: %s", account)
|
161 |
if user != account:
|
162 |
raise NotAllowedError
|
163 |
return self._get_groups(account) |
164 |
|
165 |
def update_account_groups(self, user, account, groups, replace=False): |
166 |
"""Update the groups associated with the account."""
|
167 |
|
168 |
logger.debug("update_account_groups: %s %s %s", account, groups, replace)
|
169 |
if user != account:
|
170 |
raise NotAllowedError
|
171 |
self._check_groups(groups)
|
172 |
self._put_groups(account, groups, replace)
|
173 |
|
174 |
def put_account(self, user, account): |
175 |
"""Create a new account with the given name."""
|
176 |
|
177 |
logger.debug("put_account: %s", account)
|
178 |
if user != account:
|
179 |
raise NotAllowedError
|
180 |
try:
|
181 |
version_id, mtime = self._get_accountinfo(account)
|
182 |
except NameError: |
183 |
pass
|
184 |
else:
|
185 |
raise NameError('Account already exists') |
186 |
version_id = self._put_version(account, user)
|
187 |
self.con.commit()
|
188 |
|
189 |
def delete_account(self, user, account): |
190 |
"""Delete the account with the given name."""
|
191 |
|
192 |
logger.debug("delete_account: %s", account)
|
193 |
if user != account:
|
194 |
raise NotAllowedError
|
195 |
count = self._get_pathstats(account)[0] |
196 |
if count > 0: |
197 |
raise IndexError('Account is not empty') |
198 |
sql = 'delete from versions where name = ?'
|
199 |
self.con.execute(sql, (account,))
|
200 |
self._del_groups(account)
|
201 |
self.con.commit()
|
202 |
|
203 |
def list_containers(self, user, account, marker=None, limit=10000, until=None): |
204 |
"""Return a list of containers existing under an account."""
|
205 |
|
206 |
logger.debug("list_containers: %s %s %s %s", account, marker, limit, until)
|
207 |
if user != account:
|
208 |
if until:
|
209 |
raise NotAllowedError
|
210 |
containers = self._allowed_containers(user, account)
|
211 |
start = 0
|
212 |
if marker:
|
213 |
try:
|
214 |
start = containers.index(marker) + 1
|
215 |
except ValueError: |
216 |
pass
|
217 |
if not limit or limit > 10000: |
218 |
limit = 10000
|
219 |
return containers[start:start + limit]
|
220 |
return self._list_objects(account, '', '/', marker, limit, False, [], until) |
221 |
|
222 |
def get_container_meta(self, user, account, container, until=None): |
223 |
"""Return a dictionary with the container metadata."""
|
224 |
|
225 |
logger.debug("get_container_meta: %s %s %s", account, container, until)
|
226 |
if user != account:
|
227 |
raise NotAllowedError
|
228 |
path, version_id, mtime = self._get_containerinfo(account, container, until)
|
229 |
count, bytes, tstamp = self._get_pathstats(path, until) |
230 |
if mtime > tstamp:
|
231 |
tstamp = mtime |
232 |
if until is None: |
233 |
modified = tstamp |
234 |
else:
|
235 |
modified = self._get_pathstats(path)[2] # Overall last modification |
236 |
if mtime > modified:
|
237 |
modified = mtime |
238 |
|
239 |
meta = self._get_metadata(path, version_id)
|
240 |
meta.update({'name': container, 'count': count, 'bytes': bytes, 'modified': modified}) |
241 |
if until is not None: |
242 |
meta.update({'until_timestamp': tstamp})
|
243 |
return meta
|
244 |
|
245 |
def update_container_meta(self, user, account, container, meta, replace=False): |
246 |
"""Update the metadata associated with the container."""
|
247 |
|
248 |
logger.debug("update_container_meta: %s %s %s %s", account, container, meta, replace)
|
249 |
if user != account:
|
250 |
raise NotAllowedError
|
251 |
path, version_id, mtime = self._get_containerinfo(account, container)
|
252 |
self._put_metadata(user, path, meta, replace, False) |
253 |
|
254 |
def get_container_policy(self, user, account, container): |
255 |
"""Return a dictionary with the container policy."""
|
256 |
|
257 |
logger.debug("get_container_policy: %s %s", account, container)
|
258 |
if user != account:
|
259 |
raise NotAllowedError
|
260 |
path = self._get_containerinfo(account, container)[0] |
261 |
return self._get_policy(path) |
262 |
|
263 |
def update_container_policy(self, user, account, container, policy, replace=False): |
264 |
"""Update the policy associated with the account."""
|
265 |
|
266 |
logger.debug("update_container_policy: %s %s %s %s", account, container, policy, replace)
|
267 |
if user != account:
|
268 |
raise NotAllowedError
|
269 |
path = self._get_containerinfo(account, container)[0] |
270 |
self._check_policy(policy)
|
271 |
if replace:
|
272 |
for k, v in self.default_policy.iteritems(): |
273 |
if k not in policy: |
274 |
policy[k] = v |
275 |
for k, v in policy.iteritems(): |
276 |
sql = 'insert or replace into policy (name, key, value) values (?, ?, ?)'
|
277 |
self.con.execute(sql, (path, k, v))
|
278 |
self.con.commit()
|
279 |
|
280 |
def put_container(self, user, account, container, policy=None): |
281 |
"""Create a new container with the given name."""
|
282 |
|
283 |
logger.debug("put_container: %s %s %s", account, container, policy)
|
284 |
if user != account:
|
285 |
raise NotAllowedError
|
286 |
try:
|
287 |
path, version_id, mtime = self._get_containerinfo(account, container)
|
288 |
except NameError: |
289 |
pass
|
290 |
else:
|
291 |
raise NameError('Container already exists') |
292 |
if policy:
|
293 |
self._check_policy(policy)
|
294 |
path = os.path.join(account, container) |
295 |
version_id = self._put_version(path, user)
|
296 |
for k, v in self.default_policy.iteritems(): |
297 |
if k not in policy: |
298 |
policy[k] = v |
299 |
for k, v in policy.iteritems(): |
300 |
sql = 'insert or replace into policy (name, key, value) values (?, ?, ?)'
|
301 |
self.con.execute(sql, (path, k, v))
|
302 |
self.con.commit()
|
303 |
|
304 |
def delete_container(self, user, account, container, until=None): |
305 |
"""Delete/purge the container with the given name."""
|
306 |
|
307 |
logger.debug("delete_container: %s %s %s", account, container, until)
|
308 |
if user != account:
|
309 |
raise NotAllowedError
|
310 |
path, version_id, mtime = self._get_containerinfo(account, container)
|
311 |
|
312 |
if until is not None: |
313 |
sql = '''select version_id from versions where name like ? and tstamp <= ?
|
314 |
and version_id not in (select version_id from (%s))'''
|
315 |
sql = sql % self._sql_until() # Do not delete current versions. |
316 |
c = self.con.execute(sql, (path + '/%', until)) |
317 |
for v in [x[0] for x in c.fetchall()]: |
318 |
self._del_version(v)
|
319 |
self.con.commit()
|
320 |
return
|
321 |
|
322 |
count = self._get_pathstats(path)[0] |
323 |
if count > 0: |
324 |
raise IndexError('Container is not empty') |
325 |
sql = 'delete from versions where name = ? or name like ?' # May contain hidden items. |
326 |
self.con.execute(sql, (path, path + '/%',)) |
327 |
sql = 'delete from policy where name = ?'
|
328 |
self.con.execute(sql, (path,))
|
329 |
self._copy_version(user, account, account, True, False) # New account version (for timestamp update). |
330 |
|
331 |
def list_objects(self, user, account, container, prefix='', delimiter=None, marker=None, limit=10000, virtual=True, keys=[], until=None): |
332 |
"""Return a list of objects existing under a container."""
|
333 |
|
334 |
logger.debug("list_objects: %s %s %s %s %s %s %s %s %s", account, container, prefix, delimiter, marker, limit, virtual, keys, until)
|
335 |
if user != account:
|
336 |
raise NotAllowedError
|
337 |
path, version_id, mtime = self._get_containerinfo(account, container, until)
|
338 |
return self._list_objects(path, prefix, delimiter, marker, limit, virtual, keys, until) |
339 |
|
340 |
def list_object_meta(self, user, account, container, until=None): |
341 |
"""Return a list with all the container's object meta keys."""
|
342 |
|
343 |
logger.debug("list_object_meta: %s %s %s", account, container, until)
|
344 |
if user != account:
|
345 |
raise NotAllowedError
|
346 |
path, version_id, mtime = self._get_containerinfo(account, container, until)
|
347 |
sql = '''select distinct m.key from (%s) o, metadata m
|
348 |
where m.version_id = o.version_id and o.name like ?'''
|
349 |
sql = sql % self._sql_until(until)
|
350 |
c = self.con.execute(sql, (path + '/%',)) |
351 |
return [x[0] for x in c.fetchall()] |
352 |
|
353 |
def get_object_meta(self, user, account, container, name, version=None): |
354 |
"""Return a dictionary with the object metadata."""
|
355 |
|
356 |
logger.debug("get_object_meta: %s %s %s %s", account, container, name, version)
|
357 |
self._can_read(user, account, container, name)
|
358 |
path, version_id, muser, mtime, size = self._get_objectinfo(account, container, name, version)
|
359 |
if version is None: |
360 |
modified = mtime |
361 |
else:
|
362 |
modified = self._get_version(path, version)[2] # Overall last modification |
363 |
|
364 |
meta = self._get_metadata(path, version_id)
|
365 |
meta.update({'name': name, 'bytes': size}) |
366 |
meta.update({'version': version_id, 'version_timestamp': mtime}) |
367 |
meta.update({'modified': modified, 'modified_by': muser}) |
368 |
return meta
|
369 |
|
370 |
def update_object_meta(self, user, account, container, name, meta, replace=False): |
371 |
"""Update the metadata associated with the object."""
|
372 |
|
373 |
logger.debug("update_object_meta: %s %s %s %s %s", account, container, name, meta, replace)
|
374 |
self._can_write(user, account, container, name)
|
375 |
path, version_id, muser, mtime, size = self._get_objectinfo(account, container, name)
|
376 |
self._put_metadata(user, path, meta, replace)
|
377 |
|
378 |
def get_object_permissions(self, user, account, container, name): |
379 |
"""Return the path from which this object gets its permissions from,\
|
380 |
along with a dictionary containing the permissions."""
|
381 |
|
382 |
logger.debug("get_object_permissions: %s %s %s", account, container, name)
|
383 |
self._can_read(user, account, container, name)
|
384 |
path = self._get_objectinfo(account, container, name)[0] |
385 |
return self._get_permissions(path) |
386 |
|
387 |
def update_object_permissions(self, user, account, container, name, permissions): |
388 |
"""Update the permissions associated with the object."""
|
389 |
|
390 |
logger.debug("update_object_permissions: %s %s %s %s", account, container, name, permissions)
|
391 |
if user != account:
|
392 |
raise NotAllowedError
|
393 |
path = self._get_objectinfo(account, container, name)[0] |
394 |
r, w = self._check_permissions(path, permissions)
|
395 |
self._put_permissions(path, r, w)
|
396 |
|
397 |
def get_object_public(self, user, account, container, name): |
398 |
"""Return the public URL of the object if applicable."""
|
399 |
|
400 |
logger.debug("get_object_public: %s %s %s", account, container, name)
|
401 |
self._can_read(user, account, container, name)
|
402 |
path = self._get_objectinfo(account, container, name)[0] |
403 |
if self._get_public(path): |
404 |
return '/public/' + path |
405 |
return None |
406 |
|
407 |
def update_object_public(self, user, account, container, name, public): |
408 |
"""Update the public status of the object."""
|
409 |
|
410 |
logger.debug("update_object_public: %s %s %s %s", account, container, name, public)
|
411 |
self._can_write(user, account, container, name)
|
412 |
path = self._get_objectinfo(account, container, name)[0] |
413 |
self._put_public(path, public)
|
414 |
|
415 |
def get_object_hashmap(self, user, account, container, name, version=None): |
416 |
"""Return the object's size and a list with partial hashes."""
|
417 |
|
418 |
logger.debug("get_object_hashmap: %s %s %s %s", account, container, name, version)
|
419 |
self._can_read(user, account, container, name)
|
420 |
path, version_id, muser, mtime, size = self._get_objectinfo(account, container, name, version)
|
421 |
hashmap = self.mapper.map_retr(version_id)
|
422 |
return size, [binascii.hexlify(x) for x in hashmap] |
423 |
|
424 |
def update_object_hashmap(self, user, account, container, name, size, hashmap, meta={}, replace_meta=False, permissions=None): |
425 |
"""Create/update an object with the specified size and partial hashes."""
|
426 |
|
427 |
logger.debug("update_object_hashmap: %s %s %s %s %s", account, container, name, size, hashmap)
|
428 |
if permissions is not None and user != account: |
429 |
raise NotAllowedError
|
430 |
self._can_write(user, account, container, name)
|
431 |
missing = self.blocker.block_ping([binascii.unhexlify(x) for x in hashmap]) |
432 |
if missing:
|
433 |
ie = IndexError()
|
434 |
ie.data = missing |
435 |
raise ie
|
436 |
path = self._get_containerinfo(account, container)[0] |
437 |
path = os.path.join(path, name) |
438 |
if permissions is not None: |
439 |
r, w = self._check_permissions(path, permissions)
|
440 |
src_version_id, dest_version_id = self._copy_version(user, path, path, not replace_meta, False) |
441 |
sql = 'update versions set size = ? where version_id = ?'
|
442 |
self.con.execute(sql, (size, dest_version_id))
|
443 |
self.mapper.map_stor(dest_version_id, [binascii.unhexlify(x) for x in hashmap]) |
444 |
for k, v in meta.iteritems(): |
445 |
sql = 'insert or replace into metadata (version_id, key, value) values (?, ?, ?)'
|
446 |
self.con.execute(sql, (dest_version_id, k, v))
|
447 |
if permissions is not None: |
448 |
self._put_permissions(path, r, w)
|
449 |
self.con.commit()
|
450 |
|
451 |
def copy_object(self, user, account, src_container, src_name, dest_container, dest_name, dest_meta={}, replace_meta=False, permissions=None, src_version=None): |
452 |
"""Copy an object's data and metadata."""
|
453 |
|
454 |
logger.debug("copy_object: %s %s %s %s %s %s %s %s %s", account, src_container, src_name, dest_container, dest_name, dest_meta, replace_meta, permissions, src_version)
|
455 |
if permissions is not None and user != account: |
456 |
raise NotAllowedError
|
457 |
self._can_read(user, account, src_container, src_name)
|
458 |
self._can_write(user, account, dest_container, dest_name)
|
459 |
self._get_containerinfo(account, src_container)
|
460 |
if src_version is None: |
461 |
src_path = self._get_objectinfo(account, src_container, src_name)[0] |
462 |
else:
|
463 |
src_path = os.path.join(account, src_container, src_name) |
464 |
dest_path = self._get_containerinfo(account, dest_container)[0] |
465 |
dest_path = os.path.join(dest_path, dest_name) |
466 |
if permissions is not None: |
467 |
r, w = self._check_permissions(dest_path, permissions)
|
468 |
src_version_id, dest_version_id = self._copy_version(user, src_path, dest_path, not replace_meta, True, src_version) |
469 |
for k, v in dest_meta.iteritems(): |
470 |
sql = 'insert or replace into metadata (version_id, key, value) values (?, ?, ?)'
|
471 |
self.con.execute(sql, (dest_version_id, k, v))
|
472 |
if permissions is not None: |
473 |
self._put_permissions(dest_path, r, w)
|
474 |
self.con.commit()
|
475 |
|
476 |
def move_object(self, user, account, src_container, src_name, dest_container, dest_name, dest_meta={}, replace_meta=False, permissions=None): |
477 |
"""Move an object's data and metadata."""
|
478 |
|
479 |
logger.debug("move_object: %s %s %s %s %s %s %s %s", account, src_container, src_name, dest_container, dest_name, dest_meta, replace_meta, permissions)
|
480 |
self.copy_object(user, account, src_container, src_name, dest_container, dest_name, dest_meta, replace_meta, permissions, None) |
481 |
self.delete_object(user, account, src_container, src_name)
|
482 |
|
483 |
def delete_object(self, user, account, container, name, until=None): |
484 |
"""Delete/purge an object."""
|
485 |
|
486 |
logger.debug("delete_object: %s %s %s %s", account, container, name, until)
|
487 |
if user != account:
|
488 |
raise NotAllowedError
|
489 |
|
490 |
if until is not None: |
491 |
path = os.path.join(account, container, name) |
492 |
sql = '''select version_id from versions where name = ? and tstamp <= ?'''
|
493 |
c = self.con.execute(sql, (path, until))
|
494 |
for v in [x[0] in c.fetchall()]: |
495 |
self._del_version(v)
|
496 |
try:
|
497 |
version_id = self._get_version(path)[0] |
498 |
except NameError: |
499 |
pass
|
500 |
else:
|
501 |
self._del_sharing(path)
|
502 |
self.con.commit()
|
503 |
return
|
504 |
|
505 |
path = self._get_objectinfo(account, container, name)[0] |
506 |
self._put_version(path, user, 0, 1) |
507 |
self._del_sharing(path)
|
508 |
|
509 |
def list_versions(self, user, account, container, name): |
510 |
"""Return a list of all (version, version_timestamp) tuples for an object."""
|
511 |
|
512 |
logger.debug("list_versions: %s %s %s", account, container, name)
|
513 |
self._can_read(user, account, container, name)
|
514 |
# This will even show deleted versions.
|
515 |
path = os.path.join(account, container, name) |
516 |
sql = '''select distinct version_id, tstamp from versions where name = ? and hide = 0'''
|
517 |
c = self.con.execute(sql, (path,))
|
518 |
return [(int(x[0]), int(x[1])) for x in c.fetchall()] |
519 |
|
520 |
def get_block(self, hash): |
521 |
"""Return a block's data."""
|
522 |
|
523 |
logger.debug("get_block: %s", hash) |
524 |
blocks = self.blocker.block_retr((binascii.unhexlify(hash),)) |
525 |
if not blocks: |
526 |
raise NameError('Block does not exist') |
527 |
return blocks[0] |
528 |
|
529 |
def put_block(self, data): |
530 |
"""Create a block and return the hash."""
|
531 |
|
532 |
logger.debug("put_block: %s", len(data)) |
533 |
hashes, absent = self.blocker.block_stor((data,))
|
534 |
return binascii.hexlify(hashes[0]) |
535 |
|
536 |
def update_block(self, hash, data, offset=0): |
537 |
"""Update a known block and return the hash."""
|
538 |
|
539 |
logger.debug("update_block: %s %s %s", hash, len(data), offset) |
540 |
if offset == 0 and len(data) == self.block_size: |
541 |
return self.put_block(data) |
542 |
h, e = self.blocker.block_delta(binascii.unhexlify(hash), ((offset, data),)) |
543 |
return binascii.hexlify(h)
|
544 |
|
545 |
def _sql_until(self, until=None): |
546 |
"""Return the sql to get the latest versions until the timestamp given."""
|
547 |
if until is None: |
548 |
until = int(time.time())
|
549 |
sql = '''select version_id, name, tstamp, size from versions v
|
550 |
where version_id = (select max(version_id) from versions
|
551 |
where v.name = name and tstamp <= %s)
|
552 |
and hide = 0'''
|
553 |
return sql % (until,)
|
554 |
|
555 |
def _get_pathstats(self, path, until=None): |
556 |
"""Return count and sum of size of everything under path and latest timestamp."""
|
557 |
|
558 |
sql = 'select count(version_id), total(size), max(tstamp) from (%s) where name like ?'
|
559 |
sql = sql % self._sql_until(until)
|
560 |
c = self.con.execute(sql, (path + '/%',)) |
561 |
row = c.fetchone() |
562 |
tstamp = row[2] if row[2] is not None else 0 |
563 |
return int(row[0]), int(row[1]), int(tstamp) |
564 |
|
565 |
def _get_version(self, path, version=None): |
566 |
if version is None: |
567 |
sql = '''select version_id, user, tstamp, size, hide from versions where name = ?
|
568 |
order by version_id desc limit 1'''
|
569 |
c = self.con.execute(sql, (path,))
|
570 |
row = c.fetchone() |
571 |
if not row or int(row[4]): |
572 |
raise NameError('Object does not exist') |
573 |
else:
|
574 |
# The database (sqlite) will not complain if the version is not an integer.
|
575 |
sql = '''select version_id, user, tstamp, size from versions where name = ?
|
576 |
and version_id = ?'''
|
577 |
c = self.con.execute(sql, (path, version))
|
578 |
row = c.fetchone() |
579 |
if not row: |
580 |
raise IndexError('Version does not exist') |
581 |
return str(row[0]), str(row[1]), int(row[2]), int(row[3]) |
582 |
|
583 |
def _put_version(self, path, user, size=0, hide=0): |
584 |
tstamp = int(time.time())
|
585 |
sql = 'insert into versions (name, user, tstamp, size, hide) values (?, ?, ?, ?, ?)'
|
586 |
id = self.con.execute(sql, (path, user, tstamp, size, hide)).lastrowid
|
587 |
self.con.commit()
|
588 |
return str(id) |
589 |
|
590 |
def _copy_version(self, user, src_path, dest_path, copy_meta=True, copy_data=True, src_version=None): |
591 |
if src_version is not None: |
592 |
src_version_id, muser, mtime, size = self._get_version(src_path, src_version)
|
593 |
else:
|
594 |
# Latest or create from scratch.
|
595 |
try:
|
596 |
src_version_id, muser, mtime, size = self._get_version(src_path)
|
597 |
except NameError: |
598 |
src_version_id = None
|
599 |
size = 0
|
600 |
if not copy_data: |
601 |
size = 0
|
602 |
dest_version_id = self._put_version(dest_path, user, size)
|
603 |
if copy_meta and src_version_id is not None: |
604 |
sql = 'insert into metadata select %s, key, value from metadata where version_id = ?'
|
605 |
sql = sql % dest_version_id |
606 |
self.con.execute(sql, (src_version_id,))
|
607 |
if copy_data and src_version_id is not None: |
608 |
# TODO: Copy properly.
|
609 |
hashmap = self.mapper.map_retr(src_version_id)
|
610 |
self.mapper.map_stor(dest_version_id, hashmap)
|
611 |
self.con.commit()
|
612 |
return src_version_id, dest_version_id
|
613 |
|
614 |
def _get_versioninfo(self, account, container, name, until=None): |
615 |
"""Return path, latest version, associated timestamp and size until the timestamp given."""
|
616 |
|
617 |
p = (account, container, name) |
618 |
try:
|
619 |
p = p[:p.index(None)]
|
620 |
except ValueError: |
621 |
pass
|
622 |
path = os.path.join(*p) |
623 |
sql = '''select version_id, tstamp, size from (%s) where name = ?'''
|
624 |
sql = sql % self._sql_until(until)
|
625 |
c = self.con.execute(sql, (path,))
|
626 |
row = c.fetchone() |
627 |
if row is None: |
628 |
raise NameError('Path does not exist') |
629 |
return path, str(row[0]), int(row[1]), int(row[2]) |
630 |
|
631 |
def _get_accountinfo(self, account, until=None): |
632 |
try:
|
633 |
path, version_id, mtime, size = self._get_versioninfo(account, None, None, until) |
634 |
return version_id, mtime
|
635 |
except:
|
636 |
raise NameError('Account does not exist') |
637 |
|
638 |
def _get_containerinfo(self, account, container, until=None): |
639 |
try:
|
640 |
path, version_id, mtime, size = self._get_versioninfo(account, container, None, until) |
641 |
return path, version_id, mtime
|
642 |
except:
|
643 |
raise NameError('Container does not exist') |
644 |
|
645 |
def _get_objectinfo(self, account, container, name, version=None): |
646 |
path = os.path.join(account, container, name) |
647 |
version_id, muser, mtime, size = self._get_version(path, version)
|
648 |
return path, version_id, muser, mtime, size
|
649 |
|
650 |
def _get_metadata(self, path, version): |
651 |
sql = 'select key, value from metadata where version_id = ?'
|
652 |
c = self.con.execute(sql, (version,))
|
653 |
return dict(c.fetchall()) |
654 |
|
655 |
def _put_metadata(self, user, path, meta, replace=False, copy_data=True): |
656 |
"""Create a new version and store metadata."""
|
657 |
|
658 |
src_version_id, dest_version_id = self._copy_version(user, path, path, not replace, copy_data) |
659 |
for k, v in meta.iteritems(): |
660 |
if not replace and v == '': |
661 |
sql = 'delete from metadata where version_id = ? and key = ?'
|
662 |
self.con.execute(sql, (dest_version_id, k))
|
663 |
else:
|
664 |
sql = 'insert or replace into metadata (version_id, key, value) values (?, ?, ?)'
|
665 |
self.con.execute(sql, (dest_version_id, k, v))
|
666 |
self.con.commit()
|
667 |
|
668 |
def _check_policy(self, policy): |
669 |
for k in policy.keys(): |
670 |
if policy[k] == '': |
671 |
policy[k] = self.default_policy.get(k)
|
672 |
for k, v in policy.iteritems(): |
673 |
if k == 'quota': |
674 |
q = int(v) # May raise ValueError. |
675 |
if q < 0: |
676 |
raise ValueError |
677 |
elif k == 'versioning': |
678 |
if v not in ['auto', 'manual', 'none']: |
679 |
raise ValueError |
680 |
else:
|
681 |
raise ValueError |
682 |
|
683 |
def _get_policy(self, path): |
684 |
sql = 'select key, value from policy where name = ?'
|
685 |
c = self.con.execute(sql, (path,))
|
686 |
return dict(c.fetchall()) |
687 |
|
688 |
def _list_objects(self, path, prefix='', delimiter=None, marker=None, limit=10000, virtual=True, keys=[], until=None): |
689 |
cont_prefix = path + '/'
|
690 |
if keys and len(keys) > 0: |
691 |
sql = '''select distinct o.name, o.version_id from (%s) o, metadata m where o.name like ? and
|
692 |
m.version_id = o.version_id and m.key in (%s) order by o.name'''
|
693 |
sql = sql % (self._sql_until(until), ', '.join('?' * len(keys))) |
694 |
param = (cont_prefix + prefix + '%',) + tuple(keys) |
695 |
else:
|
696 |
sql = 'select name, version_id from (%s) where name like ? order by name'
|
697 |
sql = sql % self._sql_until(until)
|
698 |
param = (cont_prefix + prefix + '%',)
|
699 |
c = self.con.execute(sql, param)
|
700 |
objects = [(x[0][len(cont_prefix):], x[1]) for x in c.fetchall()] |
701 |
if delimiter:
|
702 |
pseudo_objects = [] |
703 |
for x in objects: |
704 |
pseudo_name = x[0]
|
705 |
i = pseudo_name.find(delimiter, len(prefix))
|
706 |
if not virtual: |
707 |
# If the delimiter is not found, or the name ends
|
708 |
# with the delimiter's first occurence.
|
709 |
if i == -1 or len(pseudo_name) == i + len(delimiter): |
710 |
pseudo_objects.append(x) |
711 |
else:
|
712 |
# If the delimiter is found, keep up to (and including) the delimiter.
|
713 |
if i != -1: |
714 |
pseudo_name = pseudo_name[:i + len(delimiter)]
|
715 |
if pseudo_name not in [y[0] for y in pseudo_objects]: |
716 |
if pseudo_name == x[0]: |
717 |
pseudo_objects.append(x) |
718 |
else:
|
719 |
pseudo_objects.append((pseudo_name, None))
|
720 |
objects = pseudo_objects |
721 |
|
722 |
start = 0
|
723 |
if marker:
|
724 |
try:
|
725 |
start = [x[0] for x in objects].index(marker) + 1 |
726 |
except ValueError: |
727 |
pass
|
728 |
if not limit or limit > 10000: |
729 |
limit = 10000
|
730 |
return objects[start:start + limit]
|
731 |
|
732 |
def _del_version(self, version): |
733 |
self.mapper.map_remv(version)
|
734 |
sql = 'delete from versions where version_id = ?'
|
735 |
self.con.execute(sql, (version,))
|
736 |
|
737 |
# Access control functions.
|
738 |
|
739 |
def _check_groups(self, groups): |
740 |
# Example follows.
|
741 |
# for k, v in groups.iteritems():
|
742 |
# if True in [False or ',' in x for x in v]:
|
743 |
# raise ValueError('Bad characters in groups')
|
744 |
pass
|
745 |
|
746 |
def _get_groups(self, account): |
747 |
sql = 'select gname, user from groups where account = ?'
|
748 |
c = self.con.execute(sql, (account,))
|
749 |
groups = {} |
750 |
for row in c.fetchall(): |
751 |
if row[0] not in groups: |
752 |
groups[row[0]] = []
|
753 |
groups[row[0]].append(row[1]) |
754 |
return groups
|
755 |
|
756 |
def _put_groups(self, account, groups, replace=False): |
757 |
if replace:
|
758 |
self._del_groups(account)
|
759 |
for k, v in groups.iteritems(): |
760 |
sql = 'delete from groups where account = ? and gname = ?'
|
761 |
self.con.execute(sql, (account, k))
|
762 |
if v:
|
763 |
sql = 'insert into groups (account, gname, user) values (?, ?, ?)'
|
764 |
self.con.executemany(sql, [(account, k, x) for x in v]) |
765 |
self.con.commit()
|
766 |
|
767 |
def _del_groups(self, account): |
768 |
sql = 'delete from groups where account = ?'
|
769 |
self.con.execute(sql, (account,))
|
770 |
|
771 |
def _check_permissions(self, path, permissions): |
772 |
# Check for existing permissions.
|
773 |
sql = '''select name from permissions
|
774 |
where name != ? and (name like ? or ? like name || ?)'''
|
775 |
c = self.con.execute(sql, (path, path + '%', path, '%')) |
776 |
row = c.fetchone() |
777 |
if row:
|
778 |
ae = AttributeError()
|
779 |
ae.data = row[0]
|
780 |
raise ae
|
781 |
|
782 |
# Format given permissions.
|
783 |
if len(permissions) == 0: |
784 |
return [], []
|
785 |
r = permissions.get('read', [])
|
786 |
w = permissions.get('write', [])
|
787 |
# Examples follow.
|
788 |
# if True in [False or ',' in x for x in r]:
|
789 |
# raise ValueError('Bad characters in read permissions')
|
790 |
# if True in [False or ',' in x for x in w]:
|
791 |
# raise ValueError('Bad characters in write permissions')
|
792 |
return r, w
|
793 |
|
794 |
def _get_permissions(self, path): |
795 |
# Check for permissions at path or above.
|
796 |
sql = 'select name, op, user from permissions where ? like name || ?'
|
797 |
c = self.con.execute(sql, (path, '%')) |
798 |
name = path |
799 |
perms = {} # Return nothing, if nothing is set.
|
800 |
for row in c.fetchall(): |
801 |
name = row[0]
|
802 |
if row[1] not in perms: |
803 |
perms[row[1]] = []
|
804 |
perms[row[1]].append(row[2]) |
805 |
return name, perms
|
806 |
|
807 |
def _put_permissions(self, path, r, w): |
808 |
sql = 'delete from permissions where name = ?'
|
809 |
self.con.execute(sql, (path,))
|
810 |
sql = 'insert into permissions (name, op, user) values (?, ?, ?)'
|
811 |
if r:
|
812 |
self.con.executemany(sql, [(path, 'read', x) for x in r]) |
813 |
if w:
|
814 |
self.con.executemany(sql, [(path, 'write', x) for x in w]) |
815 |
self.con.commit()
|
816 |
|
817 |
def _get_public(self, path): |
818 |
sql = 'select name from public where name = ?'
|
819 |
c = self.con.execute(sql, (path,))
|
820 |
row = c.fetchone() |
821 |
if not row: |
822 |
return False |
823 |
return True |
824 |
|
825 |
def _put_public(self, path, public): |
826 |
if not public: |
827 |
sql = 'delete from public where name = ?'
|
828 |
else:
|
829 |
sql = 'insert or replace into public (name) values (?)'
|
830 |
self.con.execute(sql, (path,))
|
831 |
self.con.commit()
|
832 |
|
833 |
def _del_sharing(self, path): |
834 |
sql = 'delete from permissions where name = ?'
|
835 |
self.con.execute(sql, (path,))
|
836 |
sql = 'delete from public where name = ?'
|
837 |
self.con.execute(sql, (path,))
|
838 |
self.con.commit()
|
839 |
|
840 |
def _is_allowed(self, user, account, container, name, op='read'): |
841 |
if user == account:
|
842 |
return True |
843 |
path = os.path.join(account, container, name) |
844 |
if op == 'read' and self._get_public(path): |
845 |
return True |
846 |
perm_path, perms = self._get_permissions(path)
|
847 |
|
848 |
# Expand groups.
|
849 |
for x in ('read', 'write'): |
850 |
g_perms = set()
|
851 |
for y in perms.get(x, []): |
852 |
if ':' in y: |
853 |
g_account, g_name = y.split(':', 1) |
854 |
groups = self._get_groups(g_account)
|
855 |
if g_name in groups: |
856 |
g_perms.update(groups[g_name]) |
857 |
else:
|
858 |
g_perms.add(y) |
859 |
perms[x] = g_perms |
860 |
|
861 |
if op == 'read' and ('*' in perms['read'] or user in perms['read']): |
862 |
return True |
863 |
if '*' in perms['write'] or user in perms['write']: |
864 |
return True |
865 |
return False |
866 |
|
867 |
def _can_read(self, user, account, container, name): |
868 |
if not self._is_allowed(user, account, container, name, 'read'): |
869 |
raise NotAllowedError
|
870 |
|
871 |
def _can_write(self, user, account, container, name): |
872 |
if not self._is_allowed(user, account, container, name, 'write'): |
873 |
raise NotAllowedError
|
874 |
|
875 |
def _allowed_paths(self, user, prefix=None): |
876 |
sql = '''select distinct name from permissions where (user = ?
|
877 |
or user in (select account || ':' || gname from groups where user = ?))'''
|
878 |
param = (user, user) |
879 |
if prefix:
|
880 |
sql += ' and name like ?'
|
881 |
param += (prefix + '/%',)
|
882 |
c = self.con.execute(sql, param)
|
883 |
return [x[0] for x in c.fetchall()] |
884 |
|
885 |
def _allowed_accounts(self, user): |
886 |
allow = set()
|
887 |
for path in self._allowed_paths(user): |
888 |
allow.add(path.split('/', 1)[0]) |
889 |
return sorted(allow) |
890 |
|
891 |
def _allowed_containers(self, user, account): |
892 |
allow = set()
|
893 |
for path in self._allowed_paths(user, account): |
894 |
allow.add(path.split('/', 2)[1]) |
895 |
return sorted(allow) |