root / pithos / backends / modular.py @ 7ca7bb08
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# Copyright 2011 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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# 1. Redistributions of source code must retain the above
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# copyright notice, this list of conditions and the following
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# disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials
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# provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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import sys |
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import os |
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import time |
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import logging |
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import hashlib |
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import binascii |
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from base import NotAllowedError, QuotaError, BaseBackend |
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( CLUSTER_NORMAL, CLUSTER_HISTORY, CLUSTER_DELETED ) = range(3) |
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inf = float('inf') |
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logger = logging.getLogger(__name__) |
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class HashMap(list): |
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def __init__(self, blocksize, blockhash): |
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super(HashMap, self).__init__() |
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self.blocksize = blocksize
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self.blockhash = blockhash
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def _hash_raw(self, v): |
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h = hashlib.new(self.blockhash)
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h.update(v) |
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return h.digest()
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def hash(self): |
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if len(self) == 0: |
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return self._hash_raw('') |
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if len(self) == 1: |
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return self.__getitem__(0) |
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h = list(self) |
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s = 2
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while s < len(h): |
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s = s * 2
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h += [('\x00' * len(h[0]))] * (s - len(h)) |
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while len(h) > 1: |
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h = [self._hash_raw(h[x] + h[x + 1]) for x in range(0, len(h), 2)] |
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return h[0] |
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def backend_method(func=None, autocommit=1): |
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if func is None: |
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def fn(func): |
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return backend_method(func, autocommit)
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return fn
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if not autocommit: |
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return func
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def fn(self, *args, **kw): |
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self.wrapper.execute()
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try:
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ret = func(self, *args, **kw)
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self.wrapper.commit()
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return ret
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except:
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self.wrapper.rollback()
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raise
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return fn
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class ModularBackend(BaseBackend): |
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"""A modular backend.
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Uses modules for SQL functions and storage.
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"""
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def __init__(self, db_module, db_connection, block_module, block_path): |
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self.hash_algorithm = 'sha256' |
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self.block_size = 4 * 1024 * 1024 # 4MB |
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self.default_policy = {'quota': 0, 'versioning': 'manual'} |
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__import__(db_module)
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self.db_module = sys.modules[db_module]
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self.wrapper = self.db_module.DBWrapper(db_connection) |
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params = {'wrapper': self.wrapper} |
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self.permissions = self.db_module.Permissions(**params) |
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for x in ['READ', 'WRITE']: |
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setattr(self, x, getattr(self.db_module, x)) |
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self.node = self.db_module.Node(**params) |
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for x in ['ROOTNODE', 'SERIAL', 'HASH', 'SIZE', 'MTIME', 'MUSER', 'CLUSTER']: |
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setattr(self, x, getattr(self.db_module, x)) |
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__import__(block_module)
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self.block_module = sys.modules[block_module]
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params = {'path': block_path,
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'block_size': self.block_size, |
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'hash_algorithm': self.hash_algorithm} |
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self.store = self.block_module.Store(**params) |
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def close(self): |
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self.wrapper.close()
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@backend_method
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def list_accounts(self, user, marker=None, limit=10000): |
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"""Return a list of accounts the user can access."""
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logger.debug("list_accounts: %s %s %s", user, marker, limit)
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allowed = self._allowed_accounts(user)
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start, limit = self._list_limits(allowed, marker, limit)
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return allowed[start:start + limit]
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@backend_method
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def get_account_meta(self, user, account, until=None): |
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"""Return a dictionary with the account metadata."""
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logger.debug("get_account_meta: %s %s", account, until)
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path, node = self._lookup_account(account, user == account)
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if user != account:
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if until or node is None or account not in self._allowed_accounts(user): |
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raise NotAllowedError
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try:
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props = self._get_properties(node, until)
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mtime = props[self.MTIME]
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except NameError: |
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props = None
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mtime = until |
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count, bytes, tstamp = self._get_statistics(node, until) |
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tstamp = max(tstamp, mtime)
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if until is None: |
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modified = tstamp |
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else:
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modified = self._get_statistics(node)[2] # Overall last modification. |
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modified = max(modified, mtime)
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if user != account:
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meta = {'name': account}
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else:
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meta = {} |
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if props is not None: |
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meta.update(dict(self.node.attribute_get(props[self.SERIAL]))) |
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if until is not None: |
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meta.update({'until_timestamp': tstamp})
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meta.update({'name': account, 'count': count, 'bytes': bytes}) |
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meta.update({'modified': modified})
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return meta
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@backend_method
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def update_account_meta(self, user, account, meta, replace=False): |
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"""Update the metadata associated with the account."""
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logger.debug("update_account_meta: %s %s %s", account, meta, replace)
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if user != account:
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raise NotAllowedError
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path, node = self._lookup_account(account, True) |
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self._put_metadata(user, node, meta, replace)
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@backend_method
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def get_account_groups(self, user, account): |
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"""Return a dictionary with the user groups defined for this account."""
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logger.debug("get_account_groups: %s", account)
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if user != account:
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if account not in self._allowed_accounts(user): |
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raise NotAllowedError
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return {}
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self._lookup_account(account, True) |
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return self.permissions.group_dict(account) |
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@backend_method
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def update_account_groups(self, user, account, groups, replace=False): |
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"""Update the groups associated with the account."""
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logger.debug("update_account_groups: %s %s %s", account, groups, replace)
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if user != account:
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raise NotAllowedError
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self._lookup_account(account, True) |
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self._check_groups(groups)
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if replace:
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self.permissions.group_destroy(account)
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for k, v in groups.iteritems(): |
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if not replace: # If not already deleted. |
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self.permissions.group_delete(account, k)
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if v:
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self.permissions.group_addmany(account, k, v)
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@backend_method
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def get_account_policy(self, user, account): |
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"""Return a dictionary with the account policy."""
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logger.debug("get_account_policy: %s", account)
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if user != account:
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if account not in self._allowed_accounts(user): |
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raise NotAllowedError
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return {}
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path, node = self._lookup_account(account, True) |
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return self._get_policy(node) |
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@backend_method
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def update_account_policy(self, user, account, policy, replace=False): |
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"""Update the policy associated with the account."""
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logger.debug("update_account_policy: %s %s %s", account, policy, replace)
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if user != account:
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raise NotAllowedError
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path, node = self._lookup_account(account, True) |
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self._check_policy(policy)
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self._put_policy(node, policy, replace)
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@backend_method
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def put_account(self, user, account, policy={}): |
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"""Create a new account with the given name."""
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logger.debug("put_account: %s %s", account, policy)
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if user != account:
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raise NotAllowedError
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node = self.node.node_lookup(account)
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if node is not None: |
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raise NameError('Account already exists') |
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if policy:
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self._check_policy(policy)
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node = self._put_path(user, self.ROOTNODE, account) |
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self._put_policy(node, policy, True) |
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@backend_method
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def delete_account(self, user, account): |
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"""Delete the account with the given name."""
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logger.debug("delete_account: %s", account)
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if user != account:
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raise NotAllowedError
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node = self.node.node_lookup(account)
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if node is None: |
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return
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if not self.node.node_remove(node): |
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raise IndexError('Account is not empty') |
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self.permissions.group_destroy(account)
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@backend_method
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def list_containers(self, user, account, marker=None, limit=10000, shared=False, until=None): |
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"""Return a list of containers existing under an account."""
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logger.debug("list_containers: %s %s %s %s %s", account, marker, limit, shared, until)
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if user != account:
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if until or account not in self._allowed_accounts(user): |
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raise NotAllowedError
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allowed = self._allowed_containers(user, account)
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start, limit = self._list_limits(allowed, marker, limit)
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return allowed[start:start + limit]
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if shared:
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allowed = [x.split('/', 2)[1] for x in self.permissions.access_list_shared(account)] |
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allowed = list(set(allowed)) |
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start, limit = self._list_limits(allowed, marker, limit)
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return allowed[start:start + limit]
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node = self.node.node_lookup(account)
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return [x[0] for x in self._list_objects(node, account, '', '/', marker, limit, False, [], until)] |
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@backend_method
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def get_container_meta(self, user, account, container, until=None): |
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"""Return a dictionary with the container metadata."""
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logger.debug("get_container_meta: %s %s %s", account, container, until)
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if user != account:
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if until or container not in self._allowed_containers(user, account): |
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raise NotAllowedError
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path, node = self._lookup_container(account, container)
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props = self._get_properties(node, until)
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mtime = props[self.MTIME]
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count, bytes, tstamp = self._get_statistics(node, until) |
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tstamp = max(tstamp, mtime)
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if until is None: |
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modified = tstamp |
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else:
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modified = self._get_statistics(node)[2] # Overall last modification. |
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modified = max(modified, mtime)
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if user != account:
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meta = {'name': container}
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else:
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meta = dict(self.node.attribute_get(props[self.SERIAL])) |
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if until is not None: |
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meta.update({'until_timestamp': tstamp})
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meta.update({'name': container, 'count': count, 'bytes': bytes}) |
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meta.update({'modified': modified})
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return meta
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@backend_method
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def update_container_meta(self, user, account, container, meta, replace=False): |
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"""Update the metadata associated with the container."""
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logger.debug("update_container_meta: %s %s %s %s", account, container, meta, replace)
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if user != account:
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raise NotAllowedError
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path, node = self._lookup_container(account, container)
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self._put_metadata(user, node, meta, replace)
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@backend_method
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def get_container_policy(self, user, account, container): |
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"""Return a dictionary with the container policy."""
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logger.debug("get_container_policy: %s %s", account, container)
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if user != account:
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if container not in self._allowed_containers(user, account): |
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raise NotAllowedError
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return {}
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path, node = self._lookup_container(account, container)
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return self._get_policy(node) |
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@backend_method
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def update_container_policy(self, user, account, container, policy, replace=False): |
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"""Update the policy associated with the container."""
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logger.debug("update_container_policy: %s %s %s %s", account, container, policy, replace)
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if user != account:
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raise NotAllowedError
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path, node = self._lookup_container(account, container)
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self._check_policy(policy)
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self._put_policy(node, policy, replace)
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@backend_method
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def put_container(self, user, account, container, policy={}): |
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"""Create a new container with the given name."""
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logger.debug("put_container: %s %s %s", account, container, policy)
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if user != account:
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raise NotAllowedError
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try:
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path, node = self._lookup_container(account, container)
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except NameError: |
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pass
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else:
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raise NameError('Container already exists') |
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if policy:
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self._check_policy(policy)
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path = '/'.join((account, container))
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node = self._put_path(user, self._lookup_account(account, True)[1], path) |
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self._put_policy(node, policy, True) |
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@backend_method
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def delete_container(self, user, account, container, until=None): |
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"""Delete/purge the container with the given name."""
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logger.debug("delete_container: %s %s %s", account, container, until)
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if user != account:
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raise NotAllowedError
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path, node = self._lookup_container(account, container)
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if until is not None: |
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self.node.node_purge_children(node, until, CLUSTER_HISTORY)
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self.node.node_purge_children(node, until, CLUSTER_DELETED)
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return
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if self._get_statistics(node)[0] > 0: |
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raise IndexError('Container is not empty') |
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self.node.node_purge_children(node, inf, CLUSTER_HISTORY)
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self.node.node_purge_children(node, inf, CLUSTER_DELETED)
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self.node.node_remove(node)
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@backend_method
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def list_objects(self, user, account, container, prefix='', delimiter=None, marker=None, limit=10000, virtual=True, keys=[], shared=False, until=None): |
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"""Return a list of objects existing under a container."""
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logger.debug("list_objects: %s %s %s %s %s %s %s %s %s %s", account, container, prefix, delimiter, marker, limit, virtual, keys, shared, until)
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allowed = [] |
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if user != account:
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if until:
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raise NotAllowedError
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allowed = self.permissions.access_list_paths(user, '/'.join((account, container))) |
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if not allowed: |
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raise NotAllowedError
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else:
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if shared:
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allowed = self.permissions.access_list_shared('/'.join((account, container))) |
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if not allowed: |
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return []
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path, node = self._lookup_container(account, container)
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return self._list_objects(node, path, prefix, delimiter, marker, limit, virtual, keys, until, allowed) |
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@backend_method
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def list_object_meta(self, user, account, container, until=None): |
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"""Return a list with all the container's object meta keys."""
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logger.debug("list_object_meta: %s %s %s", account, container, until)
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allowed = [] |
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if user != account:
|
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if until:
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raise NotAllowedError
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allowed = self.permissions.access_list_paths(user, '/'.join((account, container))) |
419 |
if not allowed: |
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raise NotAllowedError
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path, node = self._lookup_container(account, container)
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before = until if until is not None else inf |
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return self.node.latest_attribute_keys(node, before, CLUSTER_DELETED, allowed) |
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|
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@backend_method
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def get_object_meta(self, user, account, container, name, version=None): |
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"""Return a dictionary with the object metadata."""
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logger.debug("get_object_meta: %s %s %s %s", account, container, name, version)
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self._can_read(user, account, container, name)
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path, node = self._lookup_object(account, container, name)
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props = self._get_version(node, version)
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if version is None: |
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modified = props[self.MTIME]
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else:
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try:
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modified = self._get_version(node)[self.MTIME] # Overall last modification. |
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except NameError: # Object may be deleted. |
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del_props = self.node.version_lookup(node, inf, CLUSTER_DELETED)
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if del_props is None: |
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raise NameError('Object does not exist') |
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modified = del_props[self.MTIME]
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meta = dict(self.node.attribute_get(props[self.SERIAL])) |
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meta.update({'name': name, 'bytes': props[self.SIZE]}) |
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meta.update({'version': props[self.SERIAL], 'version_timestamp': props[self.MTIME]}) |
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meta.update({'modified': modified, 'modified_by': props[self.MUSER]}) |
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return meta
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|
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@backend_method
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def update_object_meta(self, user, account, container, name, meta, replace=False): |
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"""Update the metadata associated with the object."""
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logger.debug("update_object_meta: %s %s %s %s %s", account, container, name, meta, replace)
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self._can_write(user, account, container, name)
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path, node = self._lookup_object(account, container, name)
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return self._put_metadata(user, node, meta, replace) |
458 |
|
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@backend_method
|
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def get_object_permissions(self, user, account, container, name): |
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"""Return the action allowed on the object, the path
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from which the object gets its permissions from,
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along with a dictionary containing the permissions."""
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logger.debug("get_object_permissions: %s %s %s", account, container, name)
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allowed = 'write'
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if user != account:
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path = '/'.join((account, container, name))
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if self.permissions.access_check(path, self.WRITE, user): |
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allowed = 'write'
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elif self.permissions.access_check(path, self.READ, user): |
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allowed = 'read'
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473 |
else:
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raise NotAllowedError
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path = self._lookup_object(account, container, name)[0] |
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return (allowed,) + self.permissions.access_inherit(path) |
477 |
|
478 |
@backend_method
|
479 |
def update_object_permissions(self, user, account, container, name, permissions): |
480 |
"""Update the permissions associated with the object."""
|
481 |
|
482 |
logger.debug("update_object_permissions: %s %s %s %s", account, container, name, permissions)
|
483 |
if user != account:
|
484 |
raise NotAllowedError
|
485 |
path = self._lookup_object(account, container, name)[0] |
486 |
self._check_permissions(path, permissions)
|
487 |
self.permissions.access_set(path, permissions)
|
488 |
|
489 |
@backend_method
|
490 |
def get_object_public(self, user, account, container, name): |
491 |
"""Return the public URL of the object if applicable."""
|
492 |
|
493 |
logger.debug("get_object_public: %s %s %s", account, container, name)
|
494 |
self._can_read(user, account, container, name)
|
495 |
path = self._lookup_object(account, container, name)[0] |
496 |
if self.permissions.public_check(path): |
497 |
return '/public/' + path |
498 |
return None |
499 |
|
500 |
@backend_method
|
501 |
def update_object_public(self, user, account, container, name, public): |
502 |
"""Update the public status of the object."""
|
503 |
|
504 |
logger.debug("update_object_public: %s %s %s %s", account, container, name, public)
|
505 |
self._can_write(user, account, container, name)
|
506 |
path = self._lookup_object(account, container, name)[0] |
507 |
if not public: |
508 |
self.permissions.public_unset(path)
|
509 |
else:
|
510 |
self.permissions.public_set(path)
|
511 |
|
512 |
@backend_method
|
513 |
def get_object_hashmap(self, user, account, container, name, version=None): |
514 |
"""Return the object's size and a list with partial hashes."""
|
515 |
|
516 |
logger.debug("get_object_hashmap: %s %s %s %s", account, container, name, version)
|
517 |
self._can_read(user, account, container, name)
|
518 |
path, node = self._lookup_object(account, container, name)
|
519 |
props = self._get_version(node, version)
|
520 |
hashmap = self.store.map_get(binascii.unhexlify(props[self.HASH])) |
521 |
return props[self.SIZE], [binascii.hexlify(x) for x in hashmap] |
522 |
|
523 |
def _update_object_hash(self, user, account, container, name, size, hash, meta={}, replace_meta=False, permissions=None): |
524 |
if permissions is not None and user != account: |
525 |
raise NotAllowedError
|
526 |
self._can_write(user, account, container, name)
|
527 |
if permissions is not None: |
528 |
path = '/'.join((account, container, name))
|
529 |
self._check_permissions(path, permissions)
|
530 |
|
531 |
account_path, account_node = self._lookup_account(account, True) |
532 |
container_path, container_node = self._lookup_container(account, container)
|
533 |
path, node = self._put_object_node(container_path, container_node, name)
|
534 |
src_version_id, dest_version_id = self._put_version_duplicate(user, node, size, hash) |
535 |
|
536 |
# Check quota.
|
537 |
size_delta = size # Change with versioning.
|
538 |
if size_delta > 0: |
539 |
account_quota = long(self._get_policy(account_node)['quota']) |
540 |
container_quota = long(self._get_policy(container_node)['quota']) |
541 |
if (account_quota > 0 and self._get_statistics(account_node)[1] + size_delta > account_quota) or \ |
542 |
(container_quota > 0 and self._get_statistics(container_node)[1] + size_delta > container_quota): |
543 |
# This must be executed in a transaction, so the version is never created if it fails.
|
544 |
raise QuotaError
|
545 |
|
546 |
if not replace_meta and src_version_id is not None: |
547 |
self.node.attribute_copy(src_version_id, dest_version_id)
|
548 |
self.node.attribute_set(dest_version_id, ((k, v) for k, v in meta.iteritems())) |
549 |
if permissions is not None: |
550 |
self.permissions.access_set(path, permissions)
|
551 |
return dest_version_id
|
552 |
|
553 |
@backend_method
|
554 |
def update_object_hashmap(self, user, account, container, name, size, hashmap, meta={}, replace_meta=False, permissions=None): |
555 |
"""Create/update an object with the specified size and partial hashes."""
|
556 |
|
557 |
logger.debug("update_object_hashmap: %s %s %s %s %s", account, container, name, size, hashmap)
|
558 |
if size == 0: # No such thing as an empty hashmap. |
559 |
hashmap = [self.put_block('')] |
560 |
map = HashMap(self.block_size, self.hash_algorithm) |
561 |
map.extend([binascii.unhexlify(x) for x in hashmap]) |
562 |
missing = self.store.block_search(map) |
563 |
if missing:
|
564 |
ie = IndexError()
|
565 |
ie.data = [binascii.hexlify(x) for x in missing] |
566 |
raise ie
|
567 |
|
568 |
hash = map.hash()
|
569 |
dest_version_id = self._update_object_hash(user, account, container, name, size, binascii.hexlify(hash), meta, replace_meta, permissions) |
570 |
self.store.map_put(hash, map) |
571 |
return dest_version_id
|
572 |
|
573 |
def _copy_object(self, user, src_account, src_container, src_name, dest_account, dest_container, dest_name, dest_meta={}, replace_meta=False, permissions=None, src_version=None): |
574 |
self._can_read(user, src_account, src_container, src_name)
|
575 |
path, node = self._lookup_object(src_account, src_container, src_name)
|
576 |
props = self._get_version(node, src_version)
|
577 |
src_version_id = props[self.SERIAL]
|
578 |
hash = props[self.HASH]
|
579 |
size = props[self.SIZE]
|
580 |
|
581 |
if replace_meta:
|
582 |
meta = dest_meta |
583 |
else:
|
584 |
meta = {} |
585 |
dest_version_id = self._update_object_hash(user, dest_account, dest_container, dest_name, size, hash, meta, True, permissions) |
586 |
if not replace_meta: |
587 |
self.node.attribute_copy(src_version_id, dest_version_id)
|
588 |
self.node.attribute_set(dest_version_id, ((k, v) for k, v in dest_meta.iteritems())) |
589 |
return dest_version_id
|
590 |
|
591 |
@backend_method
|
592 |
def copy_object(self, user, src_account, src_container, src_name, dest_account, dest_container, dest_name, dest_meta={}, replace_meta=False, permissions=None, src_version=None): |
593 |
"""Copy an object's data and metadata."""
|
594 |
|
595 |
logger.debug("copy_object: %s %s %s %s %s %s %s %s %s %s", src_account, src_container, src_name, dest_account, dest_container, dest_name, dest_meta, replace_meta, permissions, src_version)
|
596 |
return self._copy_object(user, src_account, src_container, src_name, dest_account, dest_container, dest_name, dest_meta, replace_meta, permissions, src_version) |
597 |
|
598 |
@backend_method
|
599 |
def move_object(self, user, src_account, src_container, src_name, dest_account, dest_container, dest_name, dest_meta={}, replace_meta=False, permissions=None): |
600 |
"""Move an object's data and metadata."""
|
601 |
|
602 |
logger.debug("move_object: %s %s %s %s %s %s %s %s %s", src_account, src_container, src_name, dest_account, dest_container, dest_name, dest_meta, replace_meta, permissions)
|
603 |
if user != src_account:
|
604 |
raise NotAllowedError
|
605 |
dest_version_id = self._copy_object(user, src_account, src_container, src_name, dest_account, dest_container, dest_name, dest_meta, replace_meta, permissions, None) |
606 |
self._delete_object(user, src_account, src_container, src_name)
|
607 |
return dest_version_id
|
608 |
|
609 |
def _delete_object(self, user, account, container, name, until=None): |
610 |
if user != account:
|
611 |
raise NotAllowedError
|
612 |
|
613 |
if until is not None: |
614 |
path = '/'.join((account, container, name))
|
615 |
node = self.node.node_lookup(path)
|
616 |
if node is None: |
617 |
return
|
618 |
self.node.node_purge(node, until, CLUSTER_NORMAL)
|
619 |
self.node.node_purge(node, until, CLUSTER_HISTORY)
|
620 |
self.node.node_purge_children(node, until, CLUSTER_DELETED)
|
621 |
try:
|
622 |
props = self._get_version(node)
|
623 |
except NameError: |
624 |
pass
|
625 |
else:
|
626 |
self.permissions.access_clear(path)
|
627 |
return
|
628 |
|
629 |
path, node = self._lookup_object(account, container, name)
|
630 |
src_version_id, dest_version_id = self._put_version_duplicate(user, node, 0, None, CLUSTER_DELETED) |
631 |
self.permissions.access_clear(path)
|
632 |
|
633 |
@backend_method
|
634 |
def delete_object(self, user, account, container, name, until=None): |
635 |
"""Delete/purge an object."""
|
636 |
|
637 |
logger.debug("delete_object: %s %s %s %s", account, container, name, until)
|
638 |
self._delete_object(user, account, container, name, until)
|
639 |
|
640 |
@backend_method
|
641 |
def list_versions(self, user, account, container, name): |
642 |
"""Return a list of all (version, version_timestamp) tuples for an object."""
|
643 |
|
644 |
logger.debug("list_versions: %s %s %s", account, container, name)
|
645 |
self._can_read(user, account, container, name)
|
646 |
path, node = self._lookup_object(account, container, name)
|
647 |
versions = self.node.node_get_versions(node)
|
648 |
return [[x[self.SERIAL], x[self.MTIME]] for x in versions if x[self.CLUSTER] != CLUSTER_DELETED] |
649 |
|
650 |
@backend_method(autocommit=0) |
651 |
def get_block(self, hash): |
652 |
"""Return a block's data."""
|
653 |
|
654 |
logger.debug("get_block: %s", hash) |
655 |
block = self.store.block_get(binascii.unhexlify(hash)) |
656 |
if not block: |
657 |
raise NameError('Block does not exist') |
658 |
return block
|
659 |
|
660 |
@backend_method(autocommit=0) |
661 |
def put_block(self, data): |
662 |
"""Store a block and return the hash."""
|
663 |
|
664 |
logger.debug("put_block: %s", len(data)) |
665 |
return binascii.hexlify(self.store.block_put(data)) |
666 |
|
667 |
@backend_method(autocommit=0) |
668 |
def update_block(self, hash, data, offset=0): |
669 |
"""Update a known block and return the hash."""
|
670 |
|
671 |
logger.debug("update_block: %s %s %s", hash, len(data), offset) |
672 |
if offset == 0 and len(data) == self.block_size: |
673 |
return self.put_block(data) |
674 |
h = self.store.block_update(binascii.unhexlify(hash), offset, data) |
675 |
return binascii.hexlify(h)
|
676 |
|
677 |
# Path functions.
|
678 |
|
679 |
def _put_object_node(self, path, parent, name): |
680 |
path = '/'.join((path, name))
|
681 |
node = self.node.node_lookup(path)
|
682 |
if node is None: |
683 |
node = self.node.node_create(parent, path)
|
684 |
return path, node
|
685 |
|
686 |
def _put_path(self, user, parent, path): |
687 |
node = self.node.node_create(parent, path)
|
688 |
self.node.version_create(node, None, 0, None, user, CLUSTER_NORMAL) |
689 |
return node
|
690 |
|
691 |
def _lookup_account(self, account, create=True): |
692 |
node = self.node.node_lookup(account)
|
693 |
if node is None and create: |
694 |
node = self._put_path(account, self.ROOTNODE, account) # User is account. |
695 |
return account, node
|
696 |
|
697 |
def _lookup_container(self, account, container): |
698 |
path = '/'.join((account, container))
|
699 |
node = self.node.node_lookup(path)
|
700 |
if node is None: |
701 |
raise NameError('Container does not exist') |
702 |
return path, node
|
703 |
|
704 |
def _lookup_object(self, account, container, name): |
705 |
path = '/'.join((account, container, name))
|
706 |
node = self.node.node_lookup(path)
|
707 |
if node is None: |
708 |
raise NameError('Object does not exist') |
709 |
return path, node
|
710 |
|
711 |
def _get_properties(self, node, until=None): |
712 |
"""Return properties until the timestamp given."""
|
713 |
|
714 |
before = until if until is not None else inf |
715 |
props = self.node.version_lookup(node, before, CLUSTER_NORMAL)
|
716 |
if props is None and until is not None: |
717 |
props = self.node.version_lookup(node, before, CLUSTER_HISTORY)
|
718 |
if props is None: |
719 |
raise NameError('Path does not exist') |
720 |
return props
|
721 |
|
722 |
def _get_statistics(self, node, until=None): |
723 |
"""Return count, sum of size and latest timestamp of everything under node."""
|
724 |
|
725 |
if until is None: |
726 |
stats = self.node.statistics_get(node, CLUSTER_NORMAL)
|
727 |
else:
|
728 |
stats = self.node.statistics_latest(node, until, CLUSTER_DELETED)
|
729 |
if stats is None: |
730 |
stats = (0, 0, 0) |
731 |
return stats
|
732 |
|
733 |
def _get_version(self, node, version=None): |
734 |
if version is None: |
735 |
props = self.node.version_lookup(node, inf, CLUSTER_NORMAL)
|
736 |
if props is None: |
737 |
raise NameError('Object does not exist') |
738 |
else:
|
739 |
try:
|
740 |
version = int(version)
|
741 |
except ValueError: |
742 |
raise IndexError('Version does not exist') |
743 |
props = self.node.version_get_properties(version)
|
744 |
if props is None or props[self.CLUSTER] == CLUSTER_DELETED: |
745 |
raise IndexError('Version does not exist') |
746 |
return props
|
747 |
|
748 |
def _put_version_duplicate(self, user, node, size=None, hash=None, cluster=CLUSTER_NORMAL): |
749 |
"""Create a new version of the node."""
|
750 |
|
751 |
props = self.node.version_lookup(node, inf, CLUSTER_NORMAL)
|
752 |
if props is not None: |
753 |
src_version_id = props[self.SERIAL]
|
754 |
src_hash = props[self.HASH]
|
755 |
src_size = props[self.SIZE]
|
756 |
else:
|
757 |
src_version_id = None
|
758 |
src_hash = None
|
759 |
src_size = 0
|
760 |
if size is None: |
761 |
hash = src_hash # This way hash can be set to None.
|
762 |
size = src_size |
763 |
|
764 |
if src_version_id is not None: |
765 |
self.node.version_recluster(src_version_id, CLUSTER_HISTORY)
|
766 |
dest_version_id, mtime = self.node.version_create(node, hash, size, src_version_id, user, cluster) |
767 |
return src_version_id, dest_version_id
|
768 |
|
769 |
def _put_metadata(self, user, node, meta, replace=False): |
770 |
"""Create a new version and store metadata."""
|
771 |
|
772 |
src_version_id, dest_version_id = self._put_version_duplicate(user, node)
|
773 |
|
774 |
# TODO: Merge with other functions that update metadata...
|
775 |
if not replace: |
776 |
if src_version_id is not None: |
777 |
self.node.attribute_copy(src_version_id, dest_version_id)
|
778 |
self.node.attribute_del(dest_version_id, (k for k, v in meta.iteritems() if v == '')) |
779 |
self.node.attribute_set(dest_version_id, ((k, v) for k, v in meta.iteritems() if v != '')) |
780 |
else:
|
781 |
self.node.attribute_set(dest_version_id, ((k, v) for k, v in meta.iteritems())) |
782 |
return dest_version_id
|
783 |
|
784 |
def _list_limits(self, listing, marker, limit): |
785 |
start = 0
|
786 |
if marker:
|
787 |
try:
|
788 |
start = listing.index(marker) + 1
|
789 |
except ValueError: |
790 |
pass
|
791 |
if not limit or limit > 10000: |
792 |
limit = 10000
|
793 |
return start, limit
|
794 |
|
795 |
def _list_objects(self, parent, path, prefix='', delimiter=None, marker=None, limit=10000, virtual=True, keys=[], until=None, allowed=[]): |
796 |
cont_prefix = path + '/'
|
797 |
prefix = cont_prefix + prefix |
798 |
start = cont_prefix + marker if marker else None |
799 |
before = until if until is not None else inf |
800 |
filterq = ','.join(keys) if keys else None |
801 |
|
802 |
objects, prefixes = self.node.latest_version_list(parent, prefix, delimiter, start, limit, before, CLUSTER_DELETED, allowed, filterq)
|
803 |
objects.extend([(p, None) for p in prefixes] if virtual else []) |
804 |
objects.sort(key=lambda x: x[0]) |
805 |
objects = [(x[0][len(cont_prefix):], x[1]) for x in objects] |
806 |
|
807 |
start, limit = self._list_limits([x[0] for x in objects], marker, limit) |
808 |
return objects[start:start + limit]
|
809 |
|
810 |
# Policy functions.
|
811 |
|
812 |
def _check_policy(self, policy): |
813 |
for k in policy.keys(): |
814 |
if policy[k] == '': |
815 |
policy[k] = self.default_policy.get(k)
|
816 |
for k, v in policy.iteritems(): |
817 |
if k == 'quota': |
818 |
q = int(v) # May raise ValueError. |
819 |
if q < 0: |
820 |
raise ValueError |
821 |
elif k == 'versioning': |
822 |
if v not in ['auto', 'manual', 'none']: |
823 |
raise ValueError |
824 |
else:
|
825 |
raise ValueError |
826 |
|
827 |
def _put_policy(self, node, policy, replace): |
828 |
if replace:
|
829 |
for k, v in self.default_policy.iteritems(): |
830 |
if k not in policy: |
831 |
policy[k] = v |
832 |
self.node.policy_set(node, policy)
|
833 |
|
834 |
def _get_policy(self, node): |
835 |
policy = self.default_policy.copy()
|
836 |
policy.update(self.node.policy_get(node))
|
837 |
return policy
|
838 |
|
839 |
# Access control functions.
|
840 |
|
841 |
def _check_groups(self, groups): |
842 |
# raise ValueError('Bad characters in groups')
|
843 |
pass
|
844 |
|
845 |
def _check_permissions(self, path, permissions): |
846 |
# raise ValueError('Bad characters in permissions')
|
847 |
|
848 |
# Check for existing permissions.
|
849 |
paths = self.permissions.access_list(path)
|
850 |
if paths:
|
851 |
ae = AttributeError()
|
852 |
ae.data = paths |
853 |
raise ae
|
854 |
|
855 |
def _can_read(self, user, account, container, name): |
856 |
if user == account:
|
857 |
return True |
858 |
path = '/'.join((account, container, name))
|
859 |
if not self.permissions.access_check(path, self.READ, user) and not self.permissions.access_check(path, self.WRITE, user): |
860 |
raise NotAllowedError
|
861 |
|
862 |
def _can_write(self, user, account, container, name): |
863 |
if user == account:
|
864 |
return True |
865 |
path = '/'.join((account, container, name))
|
866 |
if not self.permissions.access_check(path, self.WRITE, user): |
867 |
raise NotAllowedError
|
868 |
|
869 |
def _allowed_accounts(self, user): |
870 |
allow = set()
|
871 |
for path in self.permissions.access_list_paths(user): |
872 |
allow.add(path.split('/', 1)[0]) |
873 |
return sorted(allow) |
874 |
|
875 |
def _allowed_containers(self, user, account): |
876 |
allow = set()
|
877 |
for path in self.permissions.access_list_paths(user, account): |
878 |
allow.add(path.split('/', 2)[1]) |
879 |
return sorted(allow) |