1 # Copyright 2011 GRNET S.A. All rights reserved.
3 # Redistribution and use in source and binary forms, with or
4 # without modification, are permitted provided that the following
7 # 1. Redistributions of source code must retain the above
8 # copyright notice, this list of conditions and the following
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.
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.
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.
42 from base import NotAllowedError, BaseBackend
43 from lib.hashfiler import Mapper, Blocker
45 ( CLUSTER_NORMAL, CLUSTER_HISTORY, CLUSTER_DELETED ) = range(3)
50 logger = logging.getLogger(__name__)
52 def backend_method(func=None, autocommit=1):
55 return backend_method(func, autocommit)
60 def fn(self, *args, **kw):
61 self.wrapper.execute()
63 ret = func(self, *args, **kw)
67 self.wrapper.rollback()
72 class ModularBackend(BaseBackend):
75 Uses modules for SQL functions and hashfiler for storage.
78 def __init__(self, mod, path, db):
79 self.hash_algorithm = 'sha256'
80 self.block_size = 4 * 1024 * 1024 # 4MB
82 self.default_policy = {'quota': 0, 'versioning': 'auto'}
84 if path and not os.path.exists(path):
86 if not os.path.isdir(path):
87 raise RuntimeError("Cannot open path '%s'" % (path,))
90 self.mod = sys.modules[mod]
91 self.wrapper = self.mod.dbwrapper.DBWrapper(db)
93 params = {'blocksize': self.block_size,
94 'blockpath': os.path.join(path + '/blocks'),
95 'hashtype': self.hash_algorithm}
96 self.blocker = Blocker(**params)
98 params = {'mappath': os.path.join(path + '/maps'),
99 'namelen': self.blocker.hashlen}
100 self.mapper = Mapper(**params)
102 params = {'connection': self.wrapper.conn,
103 'cursor': self.wrapper.conn.cursor()}
104 self.permissions = self.mod.permissions.Permissions(**params)
105 for x in ['READ', 'WRITE']:
106 setattr(self, x, getattr(self.mod.permissions, x))
107 self.policy = self.mod.policy.Policy(**params)
108 self.node = self.mod.node.Node(**params)
109 for x in ['ROOTNODE', 'SERIAL', 'SIZE', 'MTIME', 'MUSER', 'CLUSTER']:
110 setattr(self, x, getattr(self.mod.node, x))
113 def list_accounts(self, user, marker=None, limit=10000):
114 """Return a list of accounts the user can access."""
116 logger.debug("list_accounts: %s %s %s", user, marker, limit)
117 allowed = self._allowed_accounts(user)
118 start, limit = self._list_limits(allowed, marker, limit)
119 return allowed[start:start + limit]
122 def get_account_meta(self, user, account, until=None):
123 """Return a dictionary with the account metadata."""
125 logger.debug("get_account_meta: %s %s", account, until)
126 path, node = self._lookup_account(account, user == account)
128 if until or node is None or account not in self._allowed_accounts(user):
129 raise NotAllowedError
131 props = self._get_properties(node, until)
132 mtime = props[self.MTIME]
136 count, bytes, tstamp = self._get_statistics(node, until)
137 tstamp = max(tstamp, mtime)
141 modified = self._get_statistics(node)[2] # Overall last modification.
142 modified = max(modified, mtime)
145 meta = {'name': account}
148 if props is not None:
149 meta.update(dict(self.node.attribute_get(props[self.SERIAL])))
150 if until is not None:
151 meta.update({'until_timestamp': tstamp})
152 meta.update({'name': account, 'count': count, 'bytes': bytes})
153 meta.update({'modified': modified})
157 def update_account_meta(self, user, account, meta, replace=False):
158 """Update the metadata associated with the account."""
160 logger.debug("update_account_meta: %s %s %s", account, meta, replace)
162 raise NotAllowedError
163 path, node = self._lookup_account(account, True)
164 self._put_metadata(user, node, meta, replace, False)
167 def get_account_groups(self, user, account):
168 """Return a dictionary with the user groups defined for this account."""
170 logger.debug("get_account_groups: %s", account)
172 if account not in self._allowed_accounts(user):
173 raise NotAllowedError
175 self._lookup_account(account, True)
176 return self.permissions.group_dict(account)
179 def update_account_groups(self, user, account, groups, replace=False):
180 """Update the groups associated with the account."""
182 logger.debug("update_account_groups: %s %s %s", account, groups, replace)
184 raise NotAllowedError
185 self._lookup_account(account, True)
186 self._check_groups(groups)
188 self.permissions.group_destroy(account)
189 for k, v in groups.iteritems():
190 if not replace: # If not already deleted.
191 self.permissions.group_delete(account, k)
193 self.permissions.group_addmany(account, k, v)
196 def put_account(self, user, account):
197 """Create a new account with the given name."""
199 logger.debug("put_account: %s", account)
201 raise NotAllowedError
202 node = self.node.node_lookup(account)
204 raise NameError('Account already exists')
205 self._put_path(user, self.ROOTNODE, account)
208 def delete_account(self, user, account):
209 """Delete the account with the given name."""
211 logger.debug("delete_account: %s", account)
213 raise NotAllowedError
214 node = self.node.node_lookup(account)
217 if not self.node.node_remove(node):
218 raise IndexError('Account is not empty')
219 self.permissions.group_destroy(account)
222 def list_containers(self, user, account, marker=None, limit=10000, shared=False, until=None):
223 """Return a list of containers existing under an account."""
225 logger.debug("list_containers: %s %s %s %s %s", account, marker, limit, shared, until)
227 if until or account not in self._allowed_accounts(user):
228 raise NotAllowedError
229 allowed = self._allowed_containers(user, account)
230 start, limit = self._list_limits(allowed, marker, limit)
231 return allowed[start:start + limit]
233 allowed = [x.split('/', 2)[1] for x in self.permissions.access_list_shared(account)]
234 start, limit = self._list_limits(allowed, marker, limit)
235 return allowed[start:start + limit]
236 node = self.node.node_lookup(account)
237 return [x[0] for x in self._list_objects(node, account, '', '/', marker, limit, False, [], until)]
240 def get_container_meta(self, user, account, container, until=None):
241 """Return a dictionary with the container metadata."""
243 logger.debug("get_container_meta: %s %s %s", account, container, until)
245 if until or container not in self._allowed_containers(user, account):
246 raise NotAllowedError
247 path, node = self._lookup_container(account, container)
248 props = self._get_properties(node, until)
249 mtime = props[self.MTIME]
250 count, bytes, tstamp = self._get_statistics(node, until)
251 tstamp = max(tstamp, mtime)
255 modified = self._get_statistics(node)[2] # Overall last modification.
256 modified = max(modified, mtime)
259 meta = {'name': container}
261 meta = dict(self.node.attribute_get(props[self.SERIAL]))
262 if until is not None:
263 meta.update({'until_timestamp': tstamp})
264 meta.update({'name': container, 'count': count, 'bytes': bytes})
265 meta.update({'modified': modified})
269 def update_container_meta(self, user, account, container, meta, replace=False):
270 """Update the metadata associated with the container."""
272 logger.debug("update_container_meta: %s %s %s %s", account, container, meta, replace)
274 raise NotAllowedError
275 path, node = self._lookup_container(account, container)
276 self._put_metadata(user, node, meta, replace, False)
279 def get_container_policy(self, user, account, container):
280 """Return a dictionary with the container policy."""
282 logger.debug("get_container_policy: %s %s", account, container)
284 if container not in self._allowed_containers(user, account):
285 raise NotAllowedError
287 path = self._lookup_container(account, container)[0]
288 return self.policy.policy_get(path)
291 def update_container_policy(self, user, account, container, policy, replace=False):
292 """Update the policy associated with the account."""
294 logger.debug("update_container_policy: %s %s %s %s", account, container, policy, replace)
296 raise NotAllowedError
297 path = self._lookup_container(account, container)[0]
298 self._check_policy(policy)
300 for k, v in self.default_policy.iteritems():
303 self.policy.policy_set(path, policy)
306 def put_container(self, user, account, container, policy=None):
307 """Create a new container with the given name."""
309 logger.debug("put_container: %s %s %s", account, container, policy)
311 raise NotAllowedError
313 path, node = self._lookup_container(account, container)
317 raise NameError('Container already exists')
319 self._check_policy(policy)
320 path = '/'.join((account, container))
321 self._put_path(user, self._lookup_account(account, True)[1], path)
322 for k, v in self.default_policy.iteritems():
325 self.policy.policy_set(path, policy)
328 def delete_container(self, user, account, container, until=None):
329 """Delete/purge the container with the given name."""
331 logger.debug("delete_container: %s %s %s", account, container, until)
333 raise NotAllowedError
334 path, node = self._lookup_container(account, container)
336 if until is not None:
337 versions = self.node.node_purge_children(node, until, CLUSTER_HISTORY)
339 self.mapper.map_remv(v)
340 self.node.node_purge_children(node, until, CLUSTER_DELETED)
343 if self._get_statistics(node)[0] > 0:
344 raise IndexError('Container is not empty')
345 versions = self.node.node_purge_children(node, inf, CLUSTER_HISTORY)
347 self.mapper.map_remv(v)
348 self.node.node_purge_children(node, inf, CLUSTER_DELETED)
349 self.node.node_remove(node)
350 self.policy.policy_unset(path)
353 def list_objects(self, user, account, container, prefix='', delimiter=None, marker=None, limit=10000, virtual=True, keys=[], shared=False, until=None):
354 """Return a list of objects existing under a container."""
356 logger.debug("list_objects: %s %s %s %s %s %s %s %s %s %s", account, container, prefix, delimiter, marker, limit, virtual, keys, shared, until)
360 raise NotAllowedError
361 allowed = self.permissions.access_list_paths(user, '/'.join((account, container)))
363 raise NotAllowedError
366 allowed = self.permissions.access_list_shared('/'.join((account, container)))
369 path, node = self._lookup_container(account, container)
370 return self._list_objects(node, path, prefix, delimiter, marker, limit, virtual, keys, until, allowed)
373 def list_object_meta(self, user, account, container, until=None):
374 """Return a list with all the container's object meta keys."""
376 logger.debug("list_object_meta: %s %s %s", account, container, until)
380 raise NotAllowedError
381 allowed = self.permissions.access_list_paths(user, '/'.join((account, container)))
383 raise NotAllowedError
384 path, node = self._lookup_container(account, container)
385 before = until if until is not None else inf
386 return self.node.latest_attribute_keys(node, before, CLUSTER_DELETED, allowed)
389 def get_object_meta(self, user, account, container, name, version=None):
390 """Return a dictionary with the object metadata."""
392 logger.debug("get_object_meta: %s %s %s %s", account, container, name, version)
393 self._can_read(user, account, container, name)
394 path, node = self._lookup_object(account, container, name)
395 props = self._get_version(node, version)
397 modified = props[self.MTIME]
399 modified = self._get_version(node)[self.MTIME] # Overall last modification.
401 meta = dict(self.node.attribute_get(props[self.SERIAL]))
402 meta.update({'name': name, 'bytes': props[self.SIZE]})
403 meta.update({'version': props[self.SERIAL], 'version_timestamp': props[self.MTIME]})
404 meta.update({'modified': modified, 'modified_by': props[self.MUSER]})
408 def update_object_meta(self, user, account, container, name, meta, replace=False):
409 """Update the metadata associated with the object."""
411 logger.debug("update_object_meta: %s %s %s %s %s", account, container, name, meta, replace)
412 self._can_write(user, account, container, name)
413 path, node = self._lookup_object(account, container, name)
414 return self._put_metadata(user, node, meta, replace)
417 def get_object_permissions(self, user, account, container, name):
418 """Return the path from which this object gets its permissions from,\
419 along with a dictionary containing the permissions."""
421 logger.debug("get_object_permissions: %s %s %s", account, container, name)
422 self._can_read(user, account, container, name)
423 path = self._lookup_object(account, container, name)[0]
424 return self.permissions.access_inherit(path)
427 def update_object_permissions(self, user, account, container, name, permissions):
428 """Update the permissions associated with the object."""
430 logger.debug("update_object_permissions: %s %s %s %s", account, container, name, permissions)
432 raise NotAllowedError
433 path = self._lookup_object(account, container, name)[0]
434 self._check_permissions(path, permissions)
435 self.permissions.access_set(path, permissions)
438 def get_object_public(self, user, account, container, name):
439 """Return the public URL of the object if applicable."""
441 logger.debug("get_object_public: %s %s %s", account, container, name)
442 self._can_read(user, account, container, name)
443 path = self._lookup_object(account, container, name)[0]
444 if self.permissions.public_check(path):
445 return '/public/' + path
449 def update_object_public(self, user, account, container, name, public):
450 """Update the public status of the object."""
452 logger.debug("update_object_public: %s %s %s %s", account, container, name, public)
453 self._can_write(user, account, container, name)
454 path = self._lookup_object(account, container, name)[0]
456 self.permissions.public_unset(path)
458 self.permissions.public_set(path)
461 def get_object_hashmap(self, user, account, container, name, version=None):
462 """Return the object's size and a list with partial hashes."""
464 logger.debug("get_object_hashmap: %s %s %s %s", account, container, name, version)
465 self._can_read(user, account, container, name)
466 path, node = self._lookup_object(account, container, name)
467 props = self._get_version(node, version)
468 hashmap = self.mapper.map_retr(props[self.SERIAL])
469 return props[self.SIZE], [binascii.hexlify(x) for x in hashmap]
472 def update_object_hashmap(self, user, account, container, name, size, hashmap, meta={}, replace_meta=False, permissions=None):
473 """Create/update an object with the specified size and partial hashes."""
475 logger.debug("update_object_hashmap: %s %s %s %s %s", account, container, name, size, hashmap)
476 if permissions is not None and user != account:
477 raise NotAllowedError
478 self._can_write(user, account, container, name)
479 missing = self.blocker.block_ping([binascii.unhexlify(x) for x in hashmap])
482 ie.data = [binascii.hexlify(x) for x in missing]
484 if permissions is not None:
485 self._check_permissions(path, permissions)
486 path, node = self._put_object_node(account, container, name)
487 src_version_id, dest_version_id = self._copy_version(user, node, None, node, size)
488 self.mapper.map_stor(dest_version_id, [binascii.unhexlify(x) for x in hashmap])
489 if not replace_meta and src_version_id is not None:
490 self.node.attribute_copy(src_version_id, dest_version_id)
491 self.node.attribute_set(dest_version_id, ((k, v) for k, v in meta.iteritems()))
492 if permissions is not None:
493 self.permissions.access_set(path, permissions)
494 return dest_version_id
497 def copy_object(self, user, account, src_container, src_name, dest_container, dest_name, dest_meta={}, replace_meta=False, permissions=None, src_version=None):
498 """Copy an object's data and metadata."""
500 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)
501 if permissions is not None and user != account:
502 raise NotAllowedError
503 self._can_read(user, account, src_container, src_name)
504 self._can_write(user, account, dest_container, dest_name)
505 src_path, src_node = self._lookup_object(account, src_container, src_name)
506 if permissions is not None:
507 self._check_permissions(dest_path, permissions)
508 dest_path, dest_node = self._put_object_node(account, dest_container, dest_name)
509 src_version_id, dest_version_id = self._copy_version(user, src_node, src_version, dest_node)
510 if src_version_id is not None:
511 self._copy_data(src_version_id, dest_version_id)
512 if not replace_meta and src_version_id is not None:
513 self.node.attribute_copy(src_version_id, dest_version_id)
514 self.node.attribute_set(dest_version_id, ((k, v) for k, v in dest_meta.iteritems()))
515 if permissions is not None:
516 self.permissions.access_set(dest_path, permissions)
517 return dest_version_id
520 def move_object(self, user, account, src_container, src_name, dest_container, dest_name, dest_meta={}, replace_meta=False, permissions=None):
521 """Move an object's data and metadata."""
523 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)
524 dest_version_id = self.copy_object(user, account, src_container, src_name, dest_container, dest_name, dest_meta, replace_meta, permissions, None)
525 self.delete_object(user, account, src_container, src_name)
526 return dest_version_id
529 def delete_object(self, user, account, container, name, until=None):
530 """Delete/purge an object."""
532 logger.debug("delete_object: %s %s %s %s", account, container, name, until)
534 raise NotAllowedError
536 if until is not None:
537 path = '/'.join((account, container, name))
538 node = self.node.node_lookup(path)
541 versions = self.node.node_purge(node, until, CLUSTER_NORMAL)
542 versions += self.node.node_purge(node, until, CLUSTER_HISTORY)
544 self.mapper.map_remv(v)
545 self.node.node_purge_children(node, until, CLUSTER_DELETED)
547 props = self._get_version(node)
551 self.permissions.access_clear(path)
554 path, node = self._lookup_object(account, container, name)
555 self._copy_version(user, node, None, node, 0, CLUSTER_DELETED)
556 self.permissions.access_clear(path)
559 def list_versions(self, user, account, container, name):
560 """Return a list of all (version, version_timestamp) tuples for an object."""
562 logger.debug("list_versions: %s %s %s", account, container, name)
563 self._can_read(user, account, container, name)
564 path, node = self._lookup_object(account, container, name)
565 return self.node.node_get_versions(node, ['serial', 'mtime'])
567 @backend_method(autocommit=0)
568 def get_block(self, hash):
569 """Return a block's data."""
571 logger.debug("get_block: %s", hash)
572 blocks = self.blocker.block_retr((binascii.unhexlify(hash),))
574 raise NameError('Block does not exist')
577 @backend_method(autocommit=0)
578 def put_block(self, data):
579 """Store a block and return the hash."""
581 logger.debug("put_block: %s", len(data))
582 hashes, absent = self.blocker.block_stor((data,))
583 return binascii.hexlify(hashes[0])
585 @backend_method(autocommit=0)
586 def update_block(self, hash, data, offset=0):
587 """Update a known block and return the hash."""
589 logger.debug("update_block: %s %s %s", hash, len(data), offset)
590 if offset == 0 and len(data) == self.block_size:
591 return self.put_block(data)
592 h, e = self.blocker.block_delta(binascii.unhexlify(hash), ((offset, data),))
593 return binascii.hexlify(h)
597 def _put_object_node(self, account, container, name):
598 path, parent = self._lookup_container(account, container)
599 path = '/'.join((path, name))
600 node = self.node.node_lookup(path)
602 node = self.node.node_create(parent, path)
605 def _put_path(self, user, parent, path):
606 node = self.node.node_create(parent, path)
607 self.node.version_create(node, 0, None, user, CLUSTER_NORMAL)
610 def _lookup_account(self, account, create=True):
611 node = self.node.node_lookup(account)
612 if node is None and create:
613 node = self._put_path(account, self.ROOTNODE, account) # User is account.
616 def _lookup_container(self, account, container):
617 path = '/'.join((account, container))
618 node = self.node.node_lookup(path)
620 raise NameError('Container does not exist')
623 def _lookup_object(self, account, container, name):
624 path = '/'.join((account, container, name))
625 node = self.node.node_lookup(path)
627 raise NameError('Object does not exist')
630 def _get_properties(self, node, until=None):
631 """Return properties until the timestamp given."""
633 before = until if until is not None else inf
634 props = self.node.version_lookup(node, before, CLUSTER_NORMAL)
635 if props is None and until is not None:
636 props = self.node.version_lookup(node, before, CLUSTER_HISTORY)
638 raise NameError('Path does not exist')
641 def _get_statistics(self, node, until=None):
642 """Return count, sum of size and latest timestamp of everything under node."""
645 stats = self.node.statistics_get(node, CLUSTER_NORMAL)
647 stats = self.node.statistics_latest(node, until, CLUSTER_DELETED)
652 def _get_version(self, node, version=None):
654 props = self.node.version_lookup(node, inf, CLUSTER_NORMAL)
656 raise NameError('Object does not exist')
658 props = self.node.version_get_properties(version)
659 if props is None or props[self.CLUSTER] == CLUSTER_DELETED:
660 raise IndexError('Version does not exist')
663 def _copy_version(self, user, src_node, src_version, dest_node, dest_size=None, dest_cluster=CLUSTER_NORMAL):
665 # Get source serial and size.
666 if src_version is not None:
667 src_props = self._get_version(src_node, src_version)
668 src_version_id = src_props[self.SERIAL]
669 size = src_props[self.SIZE]
671 # Latest or create from scratch.
673 src_props = self._get_version(src_node)
674 src_version_id = src_props[self.SERIAL]
675 size = src_props[self.SIZE]
677 src_version_id = None
679 if dest_size is not None:
682 # Move the latest version at destination to CLUSTER_HISTORY and create new.
683 if src_node == dest_node and src_version is None and src_version_id is not None:
684 self.node.version_recluster(src_version_id, CLUSTER_HISTORY)
686 dest_props = self.node.version_lookup(dest_node, inf, CLUSTER_NORMAL)
687 if dest_props is not None:
688 self.node.version_recluster(dest_props[self.SERIAL], CLUSTER_HISTORY)
689 dest_version_id, mtime = self.node.version_create(dest_node, size, src_version_id, user, dest_cluster)
691 return src_version_id, dest_version_id
693 def _copy_data(self, src_version, dest_version):
694 hashmap = self.mapper.map_retr(src_version)
695 self.mapper.map_stor(dest_version, hashmap)
697 def _get_metadata(self, version):
700 return dict(self.node.attribute_get(version))
702 def _put_metadata(self, user, node, meta, replace=False, copy_data=True):
703 """Create a new version and store metadata."""
705 src_version_id, dest_version_id = self._copy_version(user, node, None, node)
707 if src_version_id is not None:
708 self.node.attribute_copy(src_version_id, dest_version_id)
709 self.node.attribute_del(dest_version_id, (k for k, v in meta.iteritems() if v == ''))
710 self.node.attribute_set(dest_version_id, ((k, v) for k, v in meta.iteritems() if v != ''))
712 self.node.attribute_set(dest_version_id, ((k, v) for k, v in meta.iteritems()))
713 if copy_data and src_version_id is not None:
714 self._copy_data(src_version_id, dest_version_id)
715 return dest_version_id
717 def _list_limits(self, listing, marker, limit):
721 start = listing.index(marker) + 1
724 if not limit or limit > 10000:
728 def _list_objects(self, parent, path, prefix='', delimiter=None, marker=None, limit=10000, virtual=True, keys=[], until=None, allowed=[]):
729 cont_prefix = path + '/'
730 prefix = cont_prefix + prefix
731 start = cont_prefix + marker if marker else None
732 before = until if until is not None else inf
733 filterq = ','.join(keys) if keys else None
735 objects, prefixes = self.node.latest_version_list(parent, prefix, delimiter, start, limit, before, CLUSTER_DELETED, allowed, filterq)
736 objects.extend([(p, None) for p in prefixes] if virtual else [])
738 objects = [(x[0][len(cont_prefix):], x[1]) for x in objects]
740 start, limit = self._list_limits([x[0] for x in objects], marker, limit)
741 return objects[start:start + limit]
745 def _check_policy(self, policy):
746 for k in policy.keys():
748 policy[k] = self.default_policy.get(k)
749 for k, v in policy.iteritems():
751 q = int(v) # May raise ValueError.
754 elif k == 'versioning':
755 if v not in ['auto', 'manual', 'none']:
760 # Access control functions.
762 def _check_groups(self, groups):
763 # raise ValueError('Bad characters in groups')
766 def _check_permissions(self, path, permissions):
767 # raise ValueError('Bad characters in permissions')
769 # Check for existing permissions.
770 paths = self.permissions.access_list(path)
772 ae = AttributeError()
776 def _can_read(self, user, account, container, name):
779 path = '/'.join((account, container, name))
780 if not self.permissions.access_check(path, self.READ, user) and not self.permissions.access_check(path, self.WRITE, user):
781 raise NotAllowedError
783 def _can_write(self, user, account, container, name):
786 path = '/'.join((account, container, name))
787 if not self.permissions.access_check(path, self.WRITE, user):
788 raise NotAllowedError
790 def _allowed_accounts(self, user):
792 for path in self.permissions.access_list_paths(user):
793 allow.add(path.split('/', 1)[0])
796 def _allowed_containers(self, user, account):
798 for path in self.permissions.access_list_paths(user, account):
799 allow.add(path.split('/', 2)[1])