root / pithos / backends / simple.py @ b18ef3ad
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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 os |
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import time |
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import sqlite3 |
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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, BaseBackend |
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from pithos.lib.hashfiler import Mapper, Blocker |
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logger = logging.getLogger(__name__) |
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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.con.execute('begin deferred') |
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try:
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ret = func(self, *args, **kw)
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self.con.commit()
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return ret
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except:
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self.con.rollback()
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raise
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return fn
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class SimpleBackend(BaseBackend): |
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"""A simple backend.
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Uses SQLite for storage.
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"""
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def __init__(self, db): |
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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': 'auto'} |
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basepath = os.path.split(db)[0]
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if basepath and not os.path.exists(basepath): |
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os.makedirs(basepath) |
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if not os.path.isdir(basepath): |
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raise RuntimeError("Cannot open database at '%s'" % (db,)) |
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self.con = sqlite3.connect(basepath + '/db', check_same_thread=False) |
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sql = '''pragma foreign_keys = on'''
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self.con.execute(sql)
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sql = '''create table if not exists versions (
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version_id integer primary key,
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name text,
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user text,
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tstamp integer not null,
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size integer default 0,
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hide integer default 0)'''
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self.con.execute(sql)
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sql = '''create table if not exists metadata (
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version_id integer,
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key text,
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value text,
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primary key (version_id, key)
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foreign key (version_id) references versions(version_id)
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on delete cascade)'''
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self.con.execute(sql)
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sql = '''create table if not exists policy (
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name text, key text, value text, primary key (name, key))'''
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self.con.execute(sql)
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# Access control tables.
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sql = '''create table if not exists groups (
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account text, gname text, user text)'''
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self.con.execute(sql)
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sql = '''create table if not exists permissions (
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name text, op text, user text)'''
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self.con.execute(sql)
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sql = '''create table if not exists public (
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name text, primary key (name))'''
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self.con.execute(sql)
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self.con.commit()
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params = {'blocksize': self.block_size,
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'blockpath': basepath + '/blocks', |
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'hashtype': self.hash_algorithm} |
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self.blocker = Blocker(**params)
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params = {'mappath': basepath + '/maps',
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'namelen': self.blocker.hashlen} |
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self.mapper = Mapper(**params)
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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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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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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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try:
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version_id, mtime = self._get_accountinfo(account, until)
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except NameError: |
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version_id = None
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mtime = 0
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count, bytes, tstamp = self._get_pathstats(account, until) |
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if mtime > tstamp:
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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_pathstats(account)[2] # Overall last modification |
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if mtime > modified:
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modified = mtime |
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# Proper count.
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sql = 'select count(name) from (%s) where name glob ? and not name glob ?'
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sql = sql % self._sql_until(until)
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c = self.con.execute(sql, (account + '/*', account + '/*/*')) |
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row = c.fetchone() |
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count = row[0]
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if user != account:
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meta = {'name': account}
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else:
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meta = self._get_metadata(account, version_id)
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meta.update({'name': account, 'count': count, 'bytes': bytes})
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if until is not None: |
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meta.update({'until_timestamp': tstamp})
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if modified:
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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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self._put_metadata(user, account, meta, replace, False) |
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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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return self._get_groups(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._check_groups(groups)
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self._put_groups(account, groups, replace)
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@backend_method
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def put_account(self, user, account): |
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"""Create a new account with the given name."""
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logger.debug("put_account: %s", account)
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if user != account:
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raise NotAllowedError
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try:
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version_id, mtime = self._get_accountinfo(account)
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except NameError: |
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pass
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else:
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raise NameError('Account already exists') |
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version_id = self._put_version(account, user)
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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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count = self._get_pathstats(account)[0] |
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if count > 0: |
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raise IndexError('Account is not empty') |
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sql = 'delete from versions where name = ?'
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self.con.execute(sql, (account,))
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self._del_groups(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", account, marker, limit, 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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else:
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if shared:
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allowed = [x.split('/', 2)[1] for x in self._shared_paths(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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return [x[0] for x in self._list_objects(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, version_id, mtime = self._get_containerinfo(account, container, until)
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count, bytes, tstamp = self._get_pathstats(path, until) |
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if mtime > tstamp:
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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_pathstats(path)[2] # Overall last modification |
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if mtime > modified:
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modified = mtime |
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if user != account:
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meta = {'name': container, 'modified': modified}
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else:
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meta = self._get_metadata(path, version_id)
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meta.update({'name': container, 'count': count, 'bytes': bytes, 'modified': modified})
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if until is not None: |
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meta.update({'until_timestamp': tstamp})
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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, version_id, mtime = self._get_containerinfo(account, container)
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self._put_metadata(user, path, meta, replace, False) |
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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 = self._get_containerinfo(account, container)[0] |
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return self._get_policy(path) |
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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 account."""
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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 = self._get_containerinfo(account, container)[0] |
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self._check_policy(policy)
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if replace:
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for k, v in self.default_policy.iteritems(): |
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if k not in policy: |
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policy[k] = v |
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for k, v in policy.iteritems(): |
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sql = 'insert or replace into policy (name, key, value) values (?, ?, ?)'
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self.con.execute(sql, (path, k, v))
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@backend_method
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def put_container(self, user, account, container, policy=None): |
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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, version_id, mtime = self._get_containerinfo(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 = os.path.join(account, container) |
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version_id = self._put_version(path, user)
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for k, v in self.default_policy.iteritems(): |
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if k not in policy: |
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policy[k] = v |
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for k, v in policy.iteritems(): |
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sql = 'insert or replace into policy (name, key, value) values (?, ?, ?)'
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self.con.execute(sql, (path, k, v))
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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, version_id, mtime = self._get_containerinfo(account, container)
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if until is not None: |
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sql = '''select version_id from versions where name like ? and tstamp <= ?
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and version_id not in (select version_id from (%s))'''
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sql = sql % self._sql_until() # Do not delete current versions. |
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c = self.con.execute(sql, (path + '/%', until)) |
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for v in [x[0] for x in c.fetchall()]: |
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self._del_version(v)
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return
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count = self._get_pathstats(path)[0] |
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if count > 0: |
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raise IndexError('Container is not empty') |
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sql = 'delete from versions where name = ? or name like ?' # May contain hidden items. |
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self.con.execute(sql, (path, path + '/%',)) |
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sql = 'delete from policy where name = ?'
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self.con.execute(sql, (path,))
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self._copy_version(user, account, account, True, False) # New account version (for timestamp update). |
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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._allowed_paths(user, os.path.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._shared_paths(os.path.join(account, container))
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path, version_id, mtime = self._get_containerinfo(account, container, until)
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return self._list_objects(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._allowed_paths(user, os.path.join(account, container))
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if not allowed: |
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raise NotAllowedError
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path, version_id, mtime = self._get_containerinfo(account, container, until)
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sql = '''select distinct m.key from (%s) o, metadata m
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where m.version_id = o.version_id and o.name like ?'''
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sql = sql % self._sql_until(until)
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param = (path + '/%',)
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if allowed:
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for x in allowed: |
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sql += ' and o.name like ?'
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param += (x,) |
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c = self.con.execute(sql, param)
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return [x[0] for x in c.fetchall()] |
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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, version_id, muser, mtime, size = self._get_objectinfo(account, container, name, version)
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if version is None: |
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modified = mtime |
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else:
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modified = self._get_version(path, version)[2] # Overall last modification |
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meta = self._get_metadata(path, version_id)
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meta.update({'name': name, 'bytes': size})
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meta.update({'version': version_id, 'version_timestamp': mtime})
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meta.update({'modified': modified, 'modified_by': muser})
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return meta
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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, version_id, muser, mtime, size = self._get_objectinfo(account, container, name)
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self._put_metadata(user, path, meta, replace)
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|
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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 path from which this object gets its permissions from,\
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along with a dictionary containing the permissions."""
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|
| 450 |
logger.debug("get_object_permissions: %s %s %s", account, container, name)
|
| 451 |
self._can_read(user, account, container, name)
|
| 452 |
path = self._get_objectinfo(account, container, name)[0] |
| 453 |
return self._get_permissions(path) |
| 454 |
|
| 455 |
@backend_method
|
| 456 |
def update_object_permissions(self, user, account, container, name, permissions): |
| 457 |
"""Update the permissions associated with the object."""
|
| 458 |
|
| 459 |
logger.debug("update_object_permissions: %s %s %s %s", account, container, name, permissions)
|
| 460 |
if user != account:
|
| 461 |
raise NotAllowedError
|
| 462 |
path = self._get_objectinfo(account, container, name)[0] |
| 463 |
r, w = self._check_permissions(path, permissions)
|
| 464 |
self._put_permissions(path, r, w)
|
| 465 |
|
| 466 |
@backend_method
|
| 467 |
def get_object_public(self, user, account, container, name): |
| 468 |
"""Return the public URL of the object if applicable."""
|
| 469 |
|
| 470 |
logger.debug("get_object_public: %s %s %s", account, container, name)
|
| 471 |
self._can_read(user, account, container, name)
|
| 472 |
path = self._get_objectinfo(account, container, name)[0] |
| 473 |
if self._get_public(path): |
| 474 |
return '/public/' + path |
| 475 |
return None |
| 476 |
|
| 477 |
@backend_method
|
| 478 |
def update_object_public(self, user, account, container, name, public): |
| 479 |
"""Update the public status of the object."""
|
| 480 |
|
| 481 |
logger.debug("update_object_public: %s %s %s %s", account, container, name, public)
|
| 482 |
self._can_write(user, account, container, name)
|
| 483 |
path = self._get_objectinfo(account, container, name)[0] |
| 484 |
self._put_public(path, public)
|
| 485 |
|
| 486 |
@backend_method
|
| 487 |
def get_object_hashmap(self, user, account, container, name, version=None): |
| 488 |
"""Return the object's size and a list with partial hashes."""
|
| 489 |
|
| 490 |
logger.debug("get_object_hashmap: %s %s %s %s", account, container, name, version)
|
| 491 |
self._can_read(user, account, container, name)
|
| 492 |
path, version_id, muser, mtime, size = self._get_objectinfo(account, container, name, version)
|
| 493 |
hashmap = self.mapper.map_retr(version_id)
|
| 494 |
return size, [binascii.hexlify(x) for x in hashmap] |
| 495 |
|
| 496 |
@backend_method
|
| 497 |
def update_object_hashmap(self, user, account, container, name, size, hashmap, meta={}, replace_meta=False, permissions=None): |
| 498 |
"""Create/update an object with the specified size and partial hashes."""
|
| 499 |
|
| 500 |
logger.debug("update_object_hashmap: %s %s %s %s %s", account, container, name, size, hashmap)
|
| 501 |
if permissions is not None and user != account: |
| 502 |
raise NotAllowedError
|
| 503 |
self._can_write(user, account, container, name)
|
| 504 |
missing = self.blocker.block_ping([binascii.unhexlify(x) for x in hashmap]) |
| 505 |
if missing:
|
| 506 |
ie = IndexError()
|
| 507 |
ie.data = missing |
| 508 |
raise ie
|
| 509 |
path = self._get_containerinfo(account, container)[0] |
| 510 |
path = os.path.join(path, name) |
| 511 |
if permissions is not None: |
| 512 |
r, w = self._check_permissions(path, permissions)
|
| 513 |
src_version_id, dest_version_id = self._copy_version(user, path, path, not replace_meta, False) |
| 514 |
sql = 'update versions set size = ? where version_id = ?'
|
| 515 |
self.con.execute(sql, (size, dest_version_id))
|
| 516 |
self.mapper.map_stor(dest_version_id, [binascii.unhexlify(x) for x in hashmap]) |
| 517 |
for k, v in meta.iteritems(): |
| 518 |
sql = 'insert or replace into metadata (version_id, key, value) values (?, ?, ?)'
|
| 519 |
self.con.execute(sql, (dest_version_id, k, v))
|
| 520 |
if permissions is not None: |
| 521 |
self._put_permissions(path, r, w)
|
| 522 |
|
| 523 |
@backend_method
|
| 524 |
def copy_object(self, user, account, src_container, src_name, dest_container, dest_name, dest_meta={}, replace_meta=False, permissions=None, src_version=None): |
| 525 |
"""Copy an object's data and metadata."""
|
| 526 |
|
| 527 |
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)
|
| 528 |
if permissions is not None and user != account: |
| 529 |
raise NotAllowedError
|
| 530 |
self._can_read(user, account, src_container, src_name)
|
| 531 |
self._can_write(user, account, dest_container, dest_name)
|
| 532 |
self._get_containerinfo(account, src_container)
|
| 533 |
if src_version is None: |
| 534 |
src_path = self._get_objectinfo(account, src_container, src_name)[0] |
| 535 |
else:
|
| 536 |
src_path = os.path.join(account, src_container, src_name) |
| 537 |
dest_path = self._get_containerinfo(account, dest_container)[0] |
| 538 |
dest_path = os.path.join(dest_path, dest_name) |
| 539 |
if permissions is not None: |
| 540 |
r, w = self._check_permissions(dest_path, permissions)
|
| 541 |
src_version_id, dest_version_id = self._copy_version(user, src_path, dest_path, not replace_meta, True, src_version) |
| 542 |
for k, v in dest_meta.iteritems(): |
| 543 |
sql = 'insert or replace into metadata (version_id, key, value) values (?, ?, ?)'
|
| 544 |
self.con.execute(sql, (dest_version_id, k, v))
|
| 545 |
if permissions is not None: |
| 546 |
self._put_permissions(dest_path, r, w)
|
| 547 |
|
| 548 |
@backend_method
|
| 549 |
def move_object(self, user, account, src_container, src_name, dest_container, dest_name, dest_meta={}, replace_meta=False, permissions=None): |
| 550 |
"""Move an object's data and metadata."""
|
| 551 |
|
| 552 |
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)
|
| 553 |
self.copy_object(user, account, src_container, src_name, dest_container, dest_name, dest_meta, replace_meta, permissions, None) |
| 554 |
self.delete_object(user, account, src_container, src_name)
|
| 555 |
|
| 556 |
@backend_method
|
| 557 |
def delete_object(self, user, account, container, name, until=None): |
| 558 |
"""Delete/purge an object."""
|
| 559 |
|
| 560 |
logger.debug("delete_object: %s %s %s %s", account, container, name, until)
|
| 561 |
if user != account:
|
| 562 |
raise NotAllowedError
|
| 563 |
|
| 564 |
if until is not None: |
| 565 |
path = os.path.join(account, container, name) |
| 566 |
sql = '''select version_id from versions where name = ? and tstamp <= ?'''
|
| 567 |
c = self.con.execute(sql, (path, until))
|
| 568 |
for v in [x[0] in c.fetchall()]: |
| 569 |
self._del_version(v)
|
| 570 |
try:
|
| 571 |
version_id = self._get_version(path)[0] |
| 572 |
except NameError: |
| 573 |
pass
|
| 574 |
else:
|
| 575 |
self._del_sharing(path)
|
| 576 |
return
|
| 577 |
|
| 578 |
path = self._get_objectinfo(account, container, name)[0] |
| 579 |
self._put_version(path, user, 0, 1) |
| 580 |
self._del_sharing(path)
|
| 581 |
|
| 582 |
@backend_method
|
| 583 |
def list_versions(self, user, account, container, name): |
| 584 |
"""Return a list of all (version, version_timestamp) tuples for an object."""
|
| 585 |
|
| 586 |
logger.debug("list_versions: %s %s %s", account, container, name)
|
| 587 |
self._can_read(user, account, container, name)
|
| 588 |
# This will even show deleted versions.
|
| 589 |
path = os.path.join(account, container, name) |
| 590 |
sql = '''select distinct version_id, tstamp from versions where name = ? and hide = 0'''
|
| 591 |
c = self.con.execute(sql, (path,))
|
| 592 |
return [(int(x[0]), int(x[1])) for x in c.fetchall()] |
| 593 |
|
| 594 |
@backend_method(autocommit=0) |
| 595 |
def get_block(self, hash): |
| 596 |
"""Return a block's data."""
|
| 597 |
|
| 598 |
logger.debug("get_block: %s", hash) |
| 599 |
blocks = self.blocker.block_retr((binascii.unhexlify(hash),)) |
| 600 |
if not blocks: |
| 601 |
raise NameError('Block does not exist') |
| 602 |
return blocks[0] |
| 603 |
|
| 604 |
@backend_method(autocommit=0) |
| 605 |
def put_block(self, data): |
| 606 |
"""Create a block and return the hash."""
|
| 607 |
|
| 608 |
logger.debug("put_block: %s", len(data)) |
| 609 |
hashes, absent = self.blocker.block_stor((data,))
|
| 610 |
return binascii.hexlify(hashes[0]) |
| 611 |
|
| 612 |
@backend_method(autocommit=0) |
| 613 |
def update_block(self, hash, data, offset=0): |
| 614 |
"""Update a known block and return the hash."""
|
| 615 |
|
| 616 |
logger.debug("update_block: %s %s %s", hash, len(data), offset) |
| 617 |
if offset == 0 and len(data) == self.block_size: |
| 618 |
return self.put_block(data) |
| 619 |
h, e = self.blocker.block_delta(binascii.unhexlify(hash), ((offset, data),)) |
| 620 |
return binascii.hexlify(h)
|
| 621 |
|
| 622 |
def _sql_until(self, until=None): |
| 623 |
"""Return the sql to get the latest versions until the timestamp given."""
|
| 624 |
if until is None: |
| 625 |
until = int(time.time())
|
| 626 |
sql = '''select version_id, name, tstamp, size from versions v
|
| 627 |
where version_id = (select max(version_id) from versions
|
| 628 |
where v.name = name and tstamp <= %s)
|
| 629 |
and hide = 0'''
|
| 630 |
return sql % (until,)
|
| 631 |
|
| 632 |
def _get_pathstats(self, path, until=None): |
| 633 |
"""Return count and sum of size of everything under path and latest timestamp."""
|
| 634 |
|
| 635 |
sql = 'select count(version_id), total(size), max(tstamp) from (%s) where name like ?'
|
| 636 |
sql = sql % self._sql_until(until)
|
| 637 |
c = self.con.execute(sql, (path + '/%',)) |
| 638 |
row = c.fetchone() |
| 639 |
tstamp = row[2] if row[2] is not None else 0 |
| 640 |
return int(row[0]), int(row[1]), int(tstamp) |
| 641 |
|
| 642 |
def _get_version(self, path, version=None): |
| 643 |
if version is None: |
| 644 |
sql = '''select version_id, user, tstamp, size, hide from versions where name = ?
|
| 645 |
order by version_id desc limit 1'''
|
| 646 |
c = self.con.execute(sql, (path,))
|
| 647 |
row = c.fetchone() |
| 648 |
if not row or int(row[4]): |
| 649 |
raise NameError('Object does not exist') |
| 650 |
else:
|
| 651 |
# The database (sqlite) will not complain if the version is not an integer.
|
| 652 |
sql = '''select version_id, user, tstamp, size from versions where name = ?
|
| 653 |
and version_id = ?'''
|
| 654 |
c = self.con.execute(sql, (path, version))
|
| 655 |
row = c.fetchone() |
| 656 |
if not row: |
| 657 |
raise IndexError('Version does not exist') |
| 658 |
return str(row[0]), str(row[1]), int(row[2]), int(row[3]) |
| 659 |
|
| 660 |
def _put_version(self, path, user, size=0, hide=0): |
| 661 |
tstamp = int(time.time())
|
| 662 |
sql = 'insert into versions (name, user, tstamp, size, hide) values (?, ?, ?, ?, ?)'
|
| 663 |
id = self.con.execute(sql, (path, user, tstamp, size, hide)).lastrowid
|
| 664 |
return str(id) |
| 665 |
|
| 666 |
def _copy_version(self, user, src_path, dest_path, copy_meta=True, copy_data=True, src_version=None): |
| 667 |
if src_version is not None: |
| 668 |
src_version_id, muser, mtime, size = self._get_version(src_path, src_version)
|
| 669 |
else:
|
| 670 |
# Latest or create from scratch.
|
| 671 |
try:
|
| 672 |
src_version_id, muser, mtime, size = self._get_version(src_path)
|
| 673 |
except NameError: |
| 674 |
src_version_id = None
|
| 675 |
size = 0
|
| 676 |
if not copy_data: |
| 677 |
size = 0
|
| 678 |
dest_version_id = self._put_version(dest_path, user, size)
|
| 679 |
if copy_meta and src_version_id is not None: |
| 680 |
sql = 'insert into metadata select %s, key, value from metadata where version_id = ?'
|
| 681 |
sql = sql % dest_version_id |
| 682 |
self.con.execute(sql, (src_version_id,))
|
| 683 |
if copy_data and src_version_id is not None: |
| 684 |
# TODO: Copy properly.
|
| 685 |
hashmap = self.mapper.map_retr(src_version_id)
|
| 686 |
self.mapper.map_stor(dest_version_id, hashmap)
|
| 687 |
return src_version_id, dest_version_id
|
| 688 |
|
| 689 |
def _get_versioninfo(self, account, container, name, until=None): |
| 690 |
"""Return path, latest version, associated timestamp and size until the timestamp given."""
|
| 691 |
|
| 692 |
p = (account, container, name) |
| 693 |
try:
|
| 694 |
p = p[:p.index(None)]
|
| 695 |
except ValueError: |
| 696 |
pass
|
| 697 |
path = os.path.join(*p) |
| 698 |
sql = '''select version_id, tstamp, size from (%s) where name = ?'''
|
| 699 |
sql = sql % self._sql_until(until)
|
| 700 |
c = self.con.execute(sql, (path,))
|
| 701 |
row = c.fetchone() |
| 702 |
if row is None: |
| 703 |
raise NameError('Path does not exist') |
| 704 |
return path, str(row[0]), int(row[1]), int(row[2]) |
| 705 |
|
| 706 |
def _get_accountinfo(self, account, until=None): |
| 707 |
try:
|
| 708 |
path, version_id, mtime, size = self._get_versioninfo(account, None, None, until) |
| 709 |
return version_id, mtime
|
| 710 |
except:
|
| 711 |
raise NameError('Account does not exist') |
| 712 |
|
| 713 |
def _get_containerinfo(self, account, container, until=None): |
| 714 |
try:
|
| 715 |
path, version_id, mtime, size = self._get_versioninfo(account, container, None, until) |
| 716 |
return path, version_id, mtime
|
| 717 |
except:
|
| 718 |
raise NameError('Container does not exist') |
| 719 |
|
| 720 |
def _get_objectinfo(self, account, container, name, version=None): |
| 721 |
path = os.path.join(account, container, name) |
| 722 |
version_id, muser, mtime, size = self._get_version(path, version)
|
| 723 |
return path, version_id, muser, mtime, size
|
| 724 |
|
| 725 |
def _get_metadata(self, path, version): |
| 726 |
sql = 'select key, value from metadata where version_id = ?'
|
| 727 |
c = self.con.execute(sql, (version,))
|
| 728 |
return dict(c.fetchall()) |
| 729 |
|
| 730 |
def _put_metadata(self, user, path, meta, replace=False, copy_data=True): |
| 731 |
"""Create a new version and store metadata."""
|
| 732 |
|
| 733 |
src_version_id, dest_version_id = self._copy_version(user, path, path, not replace, copy_data) |
| 734 |
for k, v in meta.iteritems(): |
| 735 |
if not replace and v == '': |
| 736 |
sql = 'delete from metadata where version_id = ? and key = ?'
|
| 737 |
self.con.execute(sql, (dest_version_id, k))
|
| 738 |
else:
|
| 739 |
sql = 'insert or replace into metadata (version_id, key, value) values (?, ?, ?)'
|
| 740 |
self.con.execute(sql, (dest_version_id, k, v))
|
| 741 |
|
| 742 |
def _check_policy(self, policy): |
| 743 |
for k in policy.keys(): |
| 744 |
if policy[k] == '': |
| 745 |
policy[k] = self.default_policy.get(k)
|
| 746 |
for k, v in policy.iteritems(): |
| 747 |
if k == 'quota': |
| 748 |
q = int(v) # May raise ValueError. |
| 749 |
if q < 0: |
| 750 |
raise ValueError |
| 751 |
elif k == 'versioning': |
| 752 |
if v not in ['auto', 'manual', 'none']: |
| 753 |
raise ValueError |
| 754 |
else:
|
| 755 |
raise ValueError |
| 756 |
|
| 757 |
def _get_policy(self, path): |
| 758 |
sql = 'select key, value from policy where name = ?'
|
| 759 |
c = self.con.execute(sql, (path,))
|
| 760 |
return dict(c.fetchall()) |
| 761 |
|
| 762 |
|
| 763 |
def _list_limits(self, listing, marker, limit): |
| 764 |
start = 0
|
| 765 |
if marker:
|
| 766 |
try:
|
| 767 |
start = listing.index(marker) + 1
|
| 768 |
except ValueError: |
| 769 |
pass
|
| 770 |
if not limit or limit > 10000: |
| 771 |
limit = 10000
|
| 772 |
return start, limit
|
| 773 |
|
| 774 |
def _list_objects(self, path, prefix='', delimiter=None, marker=None, limit=10000, virtual=True, keys=[], until=None, allowed=[]): |
| 775 |
cont_prefix = path + '/'
|
| 776 |
if keys and len(keys) > 0: |
| 777 |
sql = '''select distinct o.name, o.version_id from (%s) o, metadata m where o.name like ? and
|
| 778 |
m.version_id = o.version_id and m.key in (%s)'''
|
| 779 |
sql = sql % (self._sql_until(until), ', '.join('?' * len(keys))) |
| 780 |
param = (cont_prefix + prefix + '%',) + tuple(keys) |
| 781 |
if allowed:
|
| 782 |
for x in allowed: |
| 783 |
sql += ' and o.name like ?'
|
| 784 |
param += (x,) |
| 785 |
sql += ' order by o.name'
|
| 786 |
else:
|
| 787 |
sql = 'select name, version_id from (%s) where name like ?'
|
| 788 |
sql = sql % self._sql_until(until)
|
| 789 |
param = (cont_prefix + prefix + '%',)
|
| 790 |
if allowed:
|
| 791 |
for x in allowed: |
| 792 |
sql += ' and name like ?'
|
| 793 |
param += (x,) |
| 794 |
sql += ' order by name'
|
| 795 |
c = self.con.execute(sql, param)
|
| 796 |
objects = [(x[0][len(cont_prefix):], x[1]) for x in c.fetchall()] |
| 797 |
if delimiter:
|
| 798 |
pseudo_objects = [] |
| 799 |
for x in objects: |
| 800 |
pseudo_name = x[0]
|
| 801 |
i = pseudo_name.find(delimiter, len(prefix))
|
| 802 |
if not virtual: |
| 803 |
# If the delimiter is not found, or the name ends
|
| 804 |
# with the delimiter's first occurence.
|
| 805 |
if i == -1 or len(pseudo_name) == i + len(delimiter): |
| 806 |
pseudo_objects.append(x) |
| 807 |
else:
|
| 808 |
# If the delimiter is found, keep up to (and including) the delimiter.
|
| 809 |
if i != -1: |
| 810 |
pseudo_name = pseudo_name[:i + len(delimiter)]
|
| 811 |
if pseudo_name not in [y[0] for y in pseudo_objects]: |
| 812 |
if pseudo_name == x[0]: |
| 813 |
pseudo_objects.append(x) |
| 814 |
else:
|
| 815 |
pseudo_objects.append((pseudo_name, None))
|
| 816 |
objects = pseudo_objects |
| 817 |
|
| 818 |
start, limit = self._list_limits([x[0] for x in objects], marker, limit) |
| 819 |
return objects[start:start + limit]
|
| 820 |
|
| 821 |
def _del_version(self, version): |
| 822 |
self.mapper.map_remv(version)
|
| 823 |
sql = 'delete from versions where version_id = ?'
|
| 824 |
self.con.execute(sql, (version,))
|
| 825 |
|
| 826 |
# Access control functions.
|
| 827 |
|
| 828 |
def _check_groups(self, groups): |
| 829 |
# Example follows.
|
| 830 |
# for k, v in groups.iteritems():
|
| 831 |
# if True in [False or ',' in x for x in v]:
|
| 832 |
# raise ValueError('Bad characters in groups')
|
| 833 |
pass
|
| 834 |
|
| 835 |
def _get_groups(self, account): |
| 836 |
sql = 'select gname, user from groups where account = ?'
|
| 837 |
c = self.con.execute(sql, (account,))
|
| 838 |
groups = {}
|
| 839 |
for row in c.fetchall(): |
| 840 |
if row[0] not in groups: |
| 841 |
groups[row[0]] = []
|
| 842 |
groups[row[0]].append(row[1]) |
| 843 |
return groups
|
| 844 |
|
| 845 |
def _put_groups(self, account, groups, replace=False): |
| 846 |
if replace:
|
| 847 |
self._del_groups(account)
|
| 848 |
for k, v in groups.iteritems(): |
| 849 |
sql = 'delete from groups where account = ? and gname = ?'
|
| 850 |
self.con.execute(sql, (account, k))
|
| 851 |
if v:
|
| 852 |
sql = 'insert into groups (account, gname, user) values (?, ?, ?)'
|
| 853 |
self.con.executemany(sql, [(account, k, x) for x in v]) |
| 854 |
|
| 855 |
def _del_groups(self, account): |
| 856 |
sql = 'delete from groups where account = ?'
|
| 857 |
self.con.execute(sql, (account,))
|
| 858 |
|
| 859 |
def _check_permissions(self, path, permissions): |
| 860 |
# Check for existing permissions.
|
| 861 |
sql = '''select name from permissions
|
| 862 |
where name != ? and (name like ? or ? like name || ?)'''
|
| 863 |
c = self.con.execute(sql, (path, path + '%', path, '%')) |
| 864 |
row = c.fetchone() |
| 865 |
if row:
|
| 866 |
ae = AttributeError()
|
| 867 |
ae.data = row[0]
|
| 868 |
raise ae
|
| 869 |
|
| 870 |
# Format given permissions.
|
| 871 |
if len(permissions) == 0: |
| 872 |
return [], []
|
| 873 |
r = permissions.get('read', [])
|
| 874 |
w = permissions.get('write', [])
|
| 875 |
# Examples follow.
|
| 876 |
# if True in [False or ',' in x for x in r]:
|
| 877 |
# raise ValueError('Bad characters in read permissions')
|
| 878 |
# if True in [False or ',' in x for x in w]:
|
| 879 |
# raise ValueError('Bad characters in write permissions')
|
| 880 |
return r, w
|
| 881 |
|
| 882 |
def _get_permissions(self, path): |
| 883 |
# Check for permissions at path or above.
|
| 884 |
sql = 'select name, op, user from permissions where ? like name || ?'
|
| 885 |
c = self.con.execute(sql, (path, '%')) |
| 886 |
name = path |
| 887 |
perms = {} # Return nothing, if nothing is set.
|
| 888 |
for row in c.fetchall(): |
| 889 |
name = row[0]
|
| 890 |
if row[1] not in perms: |
| 891 |
perms[row[1]] = []
|
| 892 |
perms[row[1]].append(row[2]) |
| 893 |
return name, perms
|
| 894 |
|
| 895 |
def _put_permissions(self, path, r, w): |
| 896 |
sql = 'delete from permissions where name = ?'
|
| 897 |
self.con.execute(sql, (path,))
|
| 898 |
sql = 'insert into permissions (name, op, user) values (?, ?, ?)'
|
| 899 |
if r:
|
| 900 |
self.con.executemany(sql, [(path, 'read', x) for x in r]) |
| 901 |
if w:
|
| 902 |
self.con.executemany(sql, [(path, 'write', x) for x in w]) |
| 903 |
|
| 904 |
def _get_public(self, path): |
| 905 |
sql = 'select name from public where name = ?'
|
| 906 |
c = self.con.execute(sql, (path,))
|
| 907 |
row = c.fetchone() |
| 908 |
if not row: |
| 909 |
return False |
| 910 |
return True |
| 911 |
|
| 912 |
def _put_public(self, path, public): |
| 913 |
if not public: |
| 914 |
sql = 'delete from public where name = ?'
|
| 915 |
else:
|
| 916 |
sql = 'insert or replace into public (name) values (?)'
|
| 917 |
self.con.execute(sql, (path,))
|
| 918 |
|
| 919 |
def _del_sharing(self, path): |
| 920 |
sql = 'delete from permissions where name = ?'
|
| 921 |
self.con.execute(sql, (path,))
|
| 922 |
sql = 'delete from public where name = ?'
|
| 923 |
self.con.execute(sql, (path,))
|
| 924 |
|
| 925 |
def _is_allowed(self, user, account, container, name, op='read'): |
| 926 |
if user == account:
|
| 927 |
return True |
| 928 |
path = os.path.join(account, container, name) |
| 929 |
if op == 'read' and self._get_public(path): |
| 930 |
return True |
| 931 |
perm_path, perms = self._get_permissions(path)
|
| 932 |
|
| 933 |
# Expand groups.
|
| 934 |
for x in ('read', 'write'): |
| 935 |
g_perms = set()
|
| 936 |
for y in perms.get(x, []): |
| 937 |
if ':' in y: |
| 938 |
g_account, g_name = y.split(':', 1) |
| 939 |
groups = self._get_groups(g_account)
|
| 940 |
if g_name in groups: |
| 941 |
g_perms.update(groups[g_name]) |
| 942 |
else:
|
| 943 |
g_perms.add(y) |
| 944 |
perms[x] = g_perms |
| 945 |
|
| 946 |
if op == 'read' and ('*' in perms['read'] or user in perms['read']): |
| 947 |
return True |
| 948 |
if '*' in perms['write'] or user in perms['write']: |
| 949 |
return True |
| 950 |
return False |
| 951 |
|
| 952 |
def _can_read(self, user, account, container, name): |
| 953 |
if not self._is_allowed(user, account, container, name, 'read'): |
| 954 |
raise NotAllowedError
|
| 955 |
|
| 956 |
def _can_write(self, user, account, container, name): |
| 957 |
if not self._is_allowed(user, account, container, name, 'write'): |
| 958 |
raise NotAllowedError
|
| 959 |
|
| 960 |
def _allowed_paths(self, user, prefix=None): |
| 961 |
sql = '''select distinct name from permissions where (user = ?
|
| 962 |
or user in (select account || ':' || gname from groups where user = ?))'''
|
| 963 |
param = (user, user) |
| 964 |
if prefix:
|
| 965 |
sql += ' and name like ?'
|
| 966 |
param += (prefix + '/%',)
|
| 967 |
c = self.con.execute(sql, param)
|
| 968 |
return [x[0] for x in c.fetchall()] |
| 969 |
|
| 970 |
def _allowed_accounts(self, user): |
| 971 |
allow = set()
|
| 972 |
for path in self._allowed_paths(user): |
| 973 |
allow.add(path.split('/', 1)[0]) |
| 974 |
return sorted(allow) |
| 975 |
|
| 976 |
def _allowed_containers(self, user, account): |
| 977 |
allow = set()
|
| 978 |
for path in self._allowed_paths(user, account): |
| 979 |
allow.add(path.split('/', 2)[1]) |
| 980 |
return sorted(allow) |
| 981 |
|
| 982 |
def _shared_paths(self, prefix): |
| 983 |
sql = 'select distinct name from permissions where name like ?'
|
| 984 |
c = self.con.execute(sql, (prefix + '/%',)) |
| 985 |
return [x[0] for x in c.fetchall()] |