root / pithos / backends / simple.py @ e0f916bb
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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 types |
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import hashlib |
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import shutil |
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import pickle |
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from base import NotAllowedError, BaseBackend |
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logger = logging.getLogger(__name__) |
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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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# TODO: Automatic/manual clean-up after a time interval.
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def __init__(self, db): |
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self.hash_algorithm = 'sha1' |
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self.block_size = 128 * 1024 # 128KB |
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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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self.con = sqlite3.connect(db, check_same_thread=False) |
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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 datetime default current_timestamp,
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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, key text, value text, primary key (version_id, key))'''
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self.con.execute(sql)
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sql = '''create table if not exists blocks (
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block_id text, data blob, primary key (block_id))'''
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self.con.execute(sql)
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sql = '''create table if not exists hashmaps (
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version_id integer, pos integer, block_id text, primary key (version_id, pos))'''
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self.con.execute(sql)
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sql = '''create table if not exists groups (
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account text, name text, users text, primary key (account, name))'''
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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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sql = '''create table if not exists permissions (
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name text, read text, write text, primary key (name))'''
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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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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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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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meta = self._get_metadata(account, version_id)
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meta.update({'name': account, 'count': count, 'bytes': bytes})
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if modified:
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meta.update({'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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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)
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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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raise NotAllowedError
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return self._get_groups(account) |
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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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for k, v in groups.iteritems(): |
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if True in [False or ',' in x for x in v]: |
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raise ValueError('Bad characters in groups') |
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if replace:
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sql = 'delete from groups where account = ?'
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self.con.execute(sql, (account,))
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for k, v in groups.iteritems(): |
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if len(v) == 0: |
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if not replace: |
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sql = 'delete from groups where account = ? and name = ?'
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self.con.execute(sql, (account, k))
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else:
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sql = 'insert or replace into groups (account, name, users) values (?, ?, ?)'
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self.con.execute(sql, (account, k, ','.join(v))) |
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self.con.commit()
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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, bytes, tstamp = self._get_pathstats(account) |
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if count > 0: |
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raise IndexError('Account is not empty') |
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self._del_path(account) # Point of no return. |
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def list_containers(self, user, account, marker=None, limit=10000, 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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raise NotAllowedError
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return self._list_objects(account, '', '/', marker, limit, False, [], until) |
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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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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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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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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)
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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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raise NotAllowedError
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path = self._get_containerinfo(account, container)[0] |
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return self._get_policy(path) |
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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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self.con.commit()
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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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self.con.commit()
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def delete_container(self, user, account, container): |
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"""Delete the container with the given name."""
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logger.debug("delete_container: %s %s", account, container)
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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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count, bytes, tstamp = self._get_pathstats(path) |
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if count > 0: |
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raise IndexError('Container is not empty') |
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self._del_path(path) # Point of no return. |
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self._copy_version(user, account, account, True, True) # New account version. |
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def list_objects(self, user, account, container, prefix='', delimiter=None, marker=None, limit=10000, virtual=True, keys=[], 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", account, container, prefix, delimiter, marker, limit, 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, until)
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return self._list_objects(path, prefix, delimiter, marker, limit, virtual, keys, until) |
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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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if 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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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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c = self.con.execute(sql, (path + '/%',)) |
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return [x[0] for x in c.fetchall()] |
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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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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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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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logger.debug("get_object_permissions: %s %s %s", account, container, name)
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self._can_read(user, account, container, name)
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path = self._get_objectinfo(account, container, name)[0] |
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return self._get_permissions(path) |
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def update_object_permissions(self, user, account, container, name, permissions): |
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"""Update the permissions associated with the object."""
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logger.debug("update_object_permissions: %s %s %s %s", account, container, name, permissions)
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if user != account:
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raise NotAllowedError
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path = self._get_objectinfo(account, container, name)[0] |
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r, w = self._check_permissions(path, permissions)
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self._put_permissions(path, r, w)
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def get_object_public(self, user, account, container, name): |
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"""Return the public URL of the object if applicable."""
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logger.debug("get_object_public: %s %s %s", account, container, name)
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self._can_read(user, account, container, name)
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path = self._get_objectinfo(account, container, name)[0] |
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if self._get_public(path): |
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return '/public/' + path |
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return None |
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def update_object_public(self, user, account, container, name, public): |
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"""Update the public status of the object."""
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logger.debug("update_object_public: %s %s %s %s", account, container, name, public)
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self._can_write(user, account, container, name)
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path = self._get_objectinfo(account, container, name)[0] |
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self._put_public(path, public)
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def get_object_hashmap(self, user, account, container, name, version=None): |
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"""Return the object's size and a list with partial hashes."""
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logger.debug("get_object_hashmap: %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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sql = 'select block_id from hashmaps where version_id = ? order by pos asc'
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c = self.con.execute(sql, (version_id,))
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hashmap = [x[0] for x in c.fetchall()] |
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return size, hashmap
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def update_object_hashmap(self, user, account, container, name, size, hashmap, meta={}, replace_meta=False, permissions=None): |
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"""Create/update an object with the specified size and partial hashes."""
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logger.debug("update_object_hashmap: %s %s %s %s %s", account, container, name, size, hashmap)
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if permissions is not None and user != account: |
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raise NotAllowedError
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self._can_write(user, account, container, name)
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missing = [] |
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for i in range(len(hashmap)): |
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sql = 'select count(*) from blocks where block_id = ?'
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c = self.con.execute(sql, (hashmap[i],))
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if c.fetchone()[0] == 0: |
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missing.append(hashmap[i]) |
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if missing:
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ie = IndexError()
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ie.data = missing |
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raise ie
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path = self._get_containerinfo(account, container)[0] |
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path = os.path.join(path, name) |
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if permissions is not None: |
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r, w = self._check_permissions(path, permissions)
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src_version_id, dest_version_id = self._copy_version(user, path, path, not replace_meta, False) |
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sql = 'update versions set size = ? where version_id = ?'
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self.con.execute(sql, (size, dest_version_id))
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# TODO: Check for block_id existence.
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for i in range(len(hashmap)): |
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sql = 'insert or replace into hashmaps (version_id, pos, block_id) values (?, ?, ?)'
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self.con.execute(sql, (dest_version_id, i, hashmap[i]))
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for k, v in meta.iteritems(): |
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sql = 'insert or replace into metadata (version_id, key, value) values (?, ?, ?)'
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self.con.execute(sql, (dest_version_id, k, v))
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if permissions is not None: |
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sql = 'insert or replace into permissions (name, read, write) values (?, ?, ?)'
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self.con.execute(sql, (path, r, w))
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self.con.commit()
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|
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def copy_object(self, user, account, src_container, src_name, dest_container, dest_name, dest_meta={}, replace_meta=False, permissions=None, src_version=None): |
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"""Copy an object's data and metadata."""
|
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|
| 421 |
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)
|
| 422 |
if permissions is not None and user != account: |
| 423 |
raise NotAllowedError
|
| 424 |
self._can_read(user, account, src_container, src_name)
|
| 425 |
self._can_write(user, account, dest_container, dest_name)
|
| 426 |
self._get_containerinfo(account, src_container)
|
| 427 |
if src_version is None: |
| 428 |
src_path = self._get_objectinfo(account, src_container, src_name)[0] |
| 429 |
else:
|
| 430 |
src_path = os.path.join(account, src_container, src_name) |
| 431 |
dest_path = self._get_containerinfo(account, dest_container)[0] |
| 432 |
dest_path = os.path.join(dest_path, dest_name) |
| 433 |
if permissions is not None: |
| 434 |
r, w = self._check_permissions(dest_path, permissions)
|
| 435 |
src_version_id, dest_version_id = self._copy_version(user, src_path, dest_path, not replace_meta, True, src_version) |
| 436 |
for k, v in dest_meta.iteritems(): |
| 437 |
sql = 'insert or replace into metadata (version_id, key, value) values (?, ?, ?)'
|
| 438 |
self.con.execute(sql, (dest_version_id, k, v))
|
| 439 |
if permissions is not None: |
| 440 |
sql = 'insert or replace into permissions (name, read, write) values (?, ?, ?)'
|
| 441 |
self.con.execute(sql, (dest_path, r, w))
|
| 442 |
self.con.commit()
|
| 443 |
|
| 444 |
def move_object(self, user, account, src_container, src_name, dest_container, dest_name, dest_meta={}, replace_meta=False, permissions=None): |
| 445 |
"""Move an object's data and metadata."""
|
| 446 |
|
| 447 |
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)
|
| 448 |
self.copy_object(user, account, src_container, src_name, dest_container, dest_name, dest_meta, replace_meta, permissions, None) |
| 449 |
self.delete_object(user, account, src_container, src_name)
|
| 450 |
|
| 451 |
def delete_object(self, user, account, container, name): |
| 452 |
"""Delete an object."""
|
| 453 |
|
| 454 |
logger.debug("delete_object: %s %s %s", account, container, name)
|
| 455 |
if user != account:
|
| 456 |
raise NotAllowedError
|
| 457 |
path = self._get_objectinfo(account, container, name)[0] |
| 458 |
self._put_version(path, user, 0, 1) |
| 459 |
sql = 'delete from permissions where name = ?'
|
| 460 |
self.con.execute(sql, (path,))
|
| 461 |
self.con.commit()
|
| 462 |
|
| 463 |
def list_versions(self, user, account, container, name): |
| 464 |
"""Return a list of all (version, version_timestamp) tuples for an object."""
|
| 465 |
|
| 466 |
logger.debug("list_versions: %s %s %s", account, container, name)
|
| 467 |
self._can_read(user, account, container, name)
|
| 468 |
# This will even show deleted versions.
|
| 469 |
path = os.path.join(account, container, name) |
| 470 |
sql = '''select distinct version_id, strftime('%s', tstamp) from versions where name = ? and hide = 0'''
|
| 471 |
c = self.con.execute(sql, (path,))
|
| 472 |
return [(int(x[0]), int(x[1])) for x in c.fetchall()] |
| 473 |
|
| 474 |
def get_block(self, hash): |
| 475 |
"""Return a block's data."""
|
| 476 |
|
| 477 |
logger.debug("get_block: %s", hash) |
| 478 |
c = self.con.execute('select data from blocks where block_id = ?', (hash,)) |
| 479 |
row = c.fetchone() |
| 480 |
if row:
|
| 481 |
return str(row[0]) |
| 482 |
else:
|
| 483 |
raise NameError('Block does not exist') |
| 484 |
|
| 485 |
def put_block(self, data): |
| 486 |
"""Create a block and return the hash."""
|
| 487 |
|
| 488 |
logger.debug("put_block: %s", len(data)) |
| 489 |
h = hashlib.new(self.hash_algorithm)
|
| 490 |
h.update(data.rstrip('\x00'))
|
| 491 |
hash = h.hexdigest() |
| 492 |
sql = 'insert or ignore into blocks (block_id, data) values (?, ?)'
|
| 493 |
self.con.execute(sql, (hash, buffer(data))) |
| 494 |
self.con.commit()
|
| 495 |
return hash |
| 496 |
|
| 497 |
def update_block(self, hash, data, offset=0): |
| 498 |
"""Update a known block and return the hash."""
|
| 499 |
|
| 500 |
logger.debug("update_block: %s %s %s", hash, len(data), offset) |
| 501 |
if offset == 0 and len(data) == self.block_size: |
| 502 |
return self.put_block(data) |
| 503 |
src_data = self.get_block(hash) |
| 504 |
bs = self.block_size
|
| 505 |
if offset < 0 or offset > bs or offset + len(data) > bs: |
| 506 |
raise IndexError('Offset or data outside block limits') |
| 507 |
dest_data = src_data[:offset] + data + src_data[offset + len(data):]
|
| 508 |
return self.put_block(dest_data) |
| 509 |
|
| 510 |
def _sql_until(self, until=None): |
| 511 |
"""Return the sql to get the latest versions until the timestamp given."""
|
| 512 |
if until is None: |
| 513 |
until = int(time.time())
|
| 514 |
sql = '''select version_id, name, strftime('%s', tstamp) as tstamp, size from versions v
|
| 515 |
where version_id = (select max(version_id) from versions
|
| 516 |
where v.name = name and tstamp <= datetime(%s, 'unixepoch'))
|
| 517 |
and hide = 0'''
|
| 518 |
return sql % ('%s', until) |
| 519 |
|
| 520 |
def _get_pathstats(self, path, until=None): |
| 521 |
"""Return count and sum of size of everything under path and latest timestamp."""
|
| 522 |
|
| 523 |
sql = 'select count(version_id), total(size), max(tstamp) from (%s) where name like ?'
|
| 524 |
sql = sql % self._sql_until(until)
|
| 525 |
c = self.con.execute(sql, (path + '/%',)) |
| 526 |
row = c.fetchone() |
| 527 |
tstamp = row[2] if row[2] is not None else 0 |
| 528 |
return int(row[0]), int(row[1]), int(tstamp) |
| 529 |
|
| 530 |
def _get_version(self, path, version=None): |
| 531 |
if version is None: |
| 532 |
sql = '''select version_id, user, strftime('%s', tstamp), size, hide from versions where name = ?
|
| 533 |
order by version_id desc limit 1'''
|
| 534 |
c = self.con.execute(sql, (path,))
|
| 535 |
row = c.fetchone() |
| 536 |
if not row or int(row[4]): |
| 537 |
raise NameError('Object does not exist') |
| 538 |
else:
|
| 539 |
# The database (sqlite) will not complain if the version is not an integer.
|
| 540 |
sql = '''select version_id, user, strftime('%s', tstamp), size from versions where name = ?
|
| 541 |
and version_id = ?'''
|
| 542 |
c = self.con.execute(sql, (path, version))
|
| 543 |
row = c.fetchone() |
| 544 |
if not row: |
| 545 |
raise IndexError('Version does not exist') |
| 546 |
return str(row[0]), str(row[1]), int(row[2]), int(row[3]) |
| 547 |
|
| 548 |
def _put_version(self, path, user, size=0, hide=0): |
| 549 |
sql = 'insert into versions (name, user, size, hide) values (?, ?, ?, ?)'
|
| 550 |
id = self.con.execute(sql, (path, user, size, hide)).lastrowid
|
| 551 |
self.con.commit()
|
| 552 |
return str(id) |
| 553 |
|
| 554 |
def _copy_version(self, user, src_path, dest_path, copy_meta=True, copy_data=True, src_version=None): |
| 555 |
if src_version is not None: |
| 556 |
src_version_id, muser, mtime, size = self._get_version(src_path, src_version)
|
| 557 |
else:
|
| 558 |
# Latest or create from scratch.
|
| 559 |
try:
|
| 560 |
src_version_id, muser, mtime, size = self._get_version(src_path)
|
| 561 |
except NameError: |
| 562 |
src_version_id = None
|
| 563 |
size = 0
|
| 564 |
if not copy_data: |
| 565 |
size = 0
|
| 566 |
dest_version_id = self._put_version(dest_path, user, size)
|
| 567 |
if copy_meta and src_version_id is not None: |
| 568 |
sql = 'insert into metadata select %s, key, value from metadata where version_id = ?'
|
| 569 |
sql = sql % dest_version_id |
| 570 |
self.con.execute(sql, (src_version_id,))
|
| 571 |
if copy_data and src_version_id is not None: |
| 572 |
sql = 'insert into hashmaps select %s, pos, block_id from hashmaps where version_id = ?'
|
| 573 |
sql = sql % dest_version_id |
| 574 |
self.con.execute(sql, (src_version_id,))
|
| 575 |
self.con.commit()
|
| 576 |
return src_version_id, dest_version_id
|
| 577 |
|
| 578 |
def _get_versioninfo(self, account, container, name, until=None): |
| 579 |
"""Return path, latest version, associated timestamp and size until the timestamp given."""
|
| 580 |
|
| 581 |
p = (account, container, name) |
| 582 |
try:
|
| 583 |
p = p[:p.index(None)]
|
| 584 |
except ValueError: |
| 585 |
pass
|
| 586 |
path = os.path.join(*p) |
| 587 |
sql = '''select version_id, tstamp, size from (%s) where name = ?'''
|
| 588 |
sql = sql % self._sql_until(until)
|
| 589 |
c = self.con.execute(sql, (path,))
|
| 590 |
row = c.fetchone() |
| 591 |
if row is None: |
| 592 |
raise NameError('Path does not exist') |
| 593 |
return path, str(row[0]), int(row[1]), int(row[2]) |
| 594 |
|
| 595 |
def _get_accountinfo(self, account, until=None): |
| 596 |
try:
|
| 597 |
path, version_id, mtime, size = self._get_versioninfo(account, None, None, until) |
| 598 |
return version_id, mtime
|
| 599 |
except:
|
| 600 |
raise NameError('Account does not exist') |
| 601 |
|
| 602 |
def _get_containerinfo(self, account, container, until=None): |
| 603 |
try:
|
| 604 |
path, version_id, mtime, size = self._get_versioninfo(account, container, None, until) |
| 605 |
return path, version_id, mtime
|
| 606 |
except:
|
| 607 |
raise NameError('Container does not exist') |
| 608 |
|
| 609 |
def _get_objectinfo(self, account, container, name, version=None): |
| 610 |
path = os.path.join(account, container, name) |
| 611 |
version_id, muser, mtime, size = self._get_version(path, version)
|
| 612 |
return path, version_id, muser, mtime, size
|
| 613 |
|
| 614 |
def _get_metadata(self, path, version): |
| 615 |
sql = 'select key, value from metadata where version_id = ?'
|
| 616 |
c = self.con.execute(sql, (version,))
|
| 617 |
return dict(c.fetchall()) |
| 618 |
|
| 619 |
def _put_metadata(self, user, path, meta, replace=False): |
| 620 |
"""Create a new version and store metadata."""
|
| 621 |
|
| 622 |
src_version_id, dest_version_id = self._copy_version(user, path, path, not replace, True) |
| 623 |
for k, v in meta.iteritems(): |
| 624 |
if not replace and v == '': |
| 625 |
sql = 'delete from metadata where version_id = ? and key = ?'
|
| 626 |
self.con.execute(sql, (dest_version_id, k))
|
| 627 |
else:
|
| 628 |
sql = 'insert or replace into metadata (version_id, key, value) values (?, ?, ?)'
|
| 629 |
self.con.execute(sql, (dest_version_id, k, v))
|
| 630 |
self.con.commit()
|
| 631 |
|
| 632 |
def _get_groups(self, account): |
| 633 |
sql = 'select name, users from groups where account = ?'
|
| 634 |
c = self.con.execute(sql, (account,))
|
| 635 |
return dict([(x[0], x[1].split(',')) for x in c.fetchall()]) |
| 636 |
|
| 637 |
def _check_policy(self, policy): |
| 638 |
for k in policy.keys(): |
| 639 |
if policy[k] == '': |
| 640 |
policy[k] = self.default_policy.get(k)
|
| 641 |
for k, v in policy.iteritems(): |
| 642 |
if k == 'quota': |
| 643 |
q = int(v) # May raise ValueError. |
| 644 |
if q < 0: |
| 645 |
raise ValueError |
| 646 |
elif k == 'versioning': |
| 647 |
if v not in ['auto', 'manual', 'none']: |
| 648 |
raise ValueError |
| 649 |
else:
|
| 650 |
raise ValueError |
| 651 |
|
| 652 |
def _get_policy(self, path): |
| 653 |
sql = 'select key, value from policy where name = ?'
|
| 654 |
c = self.con.execute(sql, (path,))
|
| 655 |
return dict(c.fetchall()) |
| 656 |
|
| 657 |
def _is_allowed(self, user, account, container, name, op='read'): |
| 658 |
if user == account:
|
| 659 |
return True |
| 660 |
path = os.path.join(account, container, name) |
| 661 |
if op == 'read' and self._get_public(path): |
| 662 |
return True |
| 663 |
perm_path, perms = self._get_permissions(path)
|
| 664 |
|
| 665 |
# Expand groups.
|
| 666 |
for x in ('read', 'write'): |
| 667 |
g_perms = [] |
| 668 |
for y in perms.get(x, []): |
| 669 |
if ':' in y: |
| 670 |
g_account, g_name = y.split(':', 1) |
| 671 |
groups = self._get_groups(g_account)
|
| 672 |
if g_name in groups: |
| 673 |
g_perms += groups[g_name] |
| 674 |
else:
|
| 675 |
g_perms.append(y) |
| 676 |
perms[x] = g_perms |
| 677 |
|
| 678 |
if op == 'read' and user in perms.get('read', []): |
| 679 |
return True |
| 680 |
if user in perms.get('write', []): |
| 681 |
return True |
| 682 |
return False |
| 683 |
|
| 684 |
def _can_read(self, user, account, container, name): |
| 685 |
if not self._is_allowed(user, account, container, name, 'read'): |
| 686 |
raise NotAllowedError
|
| 687 |
|
| 688 |
def _can_write(self, user, account, container, name): |
| 689 |
if not self._is_allowed(user, account, container, name, 'write'): |
| 690 |
raise NotAllowedError
|
| 691 |
|
| 692 |
def _check_permissions(self, path, permissions): |
| 693 |
# Check for existing permissions.
|
| 694 |
sql = '''select name from permissions
|
| 695 |
where name != ? and (name like ? or ? like name || ?)'''
|
| 696 |
c = self.con.execute(sql, (path, path + '%', path, '%')) |
| 697 |
rows = c.fetchall() |
| 698 |
if rows:
|
| 699 |
raise AttributeError('Permissions already set') |
| 700 |
|
| 701 |
# Format given permissions.
|
| 702 |
if len(permissions) == 0: |
| 703 |
return '', '' |
| 704 |
r = permissions.get('read', [])
|
| 705 |
w = permissions.get('write', [])
|
| 706 |
if True in [False or ',' in x for x in r]: |
| 707 |
raise ValueError('Bad characters in read permissions') |
| 708 |
if True in [False or ',' in x for x in w]: |
| 709 |
raise ValueError('Bad characters in write permissions') |
| 710 |
return ','.join(r), ','.join(w) |
| 711 |
|
| 712 |
def _get_permissions(self, path): |
| 713 |
# Check for permissions at path or above.
|
| 714 |
sql = 'select name, read, write from permissions where ? like name || ?'
|
| 715 |
c = self.con.execute(sql, (path, '%')) |
| 716 |
row = c.fetchone() |
| 717 |
if not row: |
| 718 |
return path, {}
|
| 719 |
|
| 720 |
name, r, w = row |
| 721 |
ret = {}
|
| 722 |
if w != '': |
| 723 |
ret['write'] = w.split(',') |
| 724 |
if r != '': |
| 725 |
ret['read'] = r.split(',') |
| 726 |
return name, ret
|
| 727 |
|
| 728 |
def _put_permissions(self, path, r, w): |
| 729 |
if r == '' and w == '': |
| 730 |
sql = 'delete from permissions where name = ?'
|
| 731 |
self.con.execute(sql, (path,))
|
| 732 |
else:
|
| 733 |
sql = 'insert or replace into permissions (name, read, write) values (?, ?, ?)'
|
| 734 |
self.con.execute(sql, (path, r, w))
|
| 735 |
self.con.commit()
|
| 736 |
|
| 737 |
def _get_public(self, path): |
| 738 |
sql = 'select name from public where name = ?'
|
| 739 |
c = self.con.execute(sql, (path,))
|
| 740 |
row = c.fetchone() |
| 741 |
if not row: |
| 742 |
return False |
| 743 |
return True |
| 744 |
|
| 745 |
def _put_public(self, path, public): |
| 746 |
if not public: |
| 747 |
sql = 'delete from public where name = ?'
|
| 748 |
else:
|
| 749 |
sql = 'insert or replace into public (name) values (?)'
|
| 750 |
self.con.execute(sql, (path,))
|
| 751 |
self.con.commit()
|
| 752 |
|
| 753 |
def _list_objects(self, path, prefix='', delimiter=None, marker=None, limit=10000, virtual=True, keys=[], until=None): |
| 754 |
cont_prefix = path + '/'
|
| 755 |
if keys and len(keys) > 0: |
| 756 |
sql = '''select distinct o.name, o.version_id from (%s) o, metadata m where o.name like ? and
|
| 757 |
m.version_id = o.version_id and m.key in (%s) order by o.name'''
|
| 758 |
sql = sql % (self._sql_until(until), ', '.join('?' * len(keys))) |
| 759 |
param = (cont_prefix + prefix + '%',) + tuple(keys) |
| 760 |
else:
|
| 761 |
sql = 'select name, version_id from (%s) where name like ? order by name'
|
| 762 |
sql = sql % self._sql_until(until)
|
| 763 |
param = (cont_prefix + prefix + '%',)
|
| 764 |
c = self.con.execute(sql, param)
|
| 765 |
objects = [(x[0][len(cont_prefix):], x[1]) for x in c.fetchall()] |
| 766 |
if delimiter:
|
| 767 |
pseudo_objects = [] |
| 768 |
for x in objects: |
| 769 |
pseudo_name = x[0]
|
| 770 |
i = pseudo_name.find(delimiter, len(prefix))
|
| 771 |
if not virtual: |
| 772 |
# If the delimiter is not found, or the name ends
|
| 773 |
# with the delimiter's first occurence.
|
| 774 |
if i == -1 or len(pseudo_name) == i + len(delimiter): |
| 775 |
pseudo_objects.append(x) |
| 776 |
else:
|
| 777 |
# If the delimiter is found, keep up to (and including) the delimiter.
|
| 778 |
if i != -1: |
| 779 |
pseudo_name = pseudo_name[:i + len(delimiter)]
|
| 780 |
if pseudo_name not in [y[0] for y in pseudo_objects]: |
| 781 |
if pseudo_name == x[0]: |
| 782 |
pseudo_objects.append(x) |
| 783 |
else:
|
| 784 |
pseudo_objects.append((pseudo_name, None))
|
| 785 |
objects = pseudo_objects |
| 786 |
|
| 787 |
start = 0
|
| 788 |
if marker:
|
| 789 |
try:
|
| 790 |
start = [x[0] for x in objects].index(marker) + 1 |
| 791 |
except ValueError: |
| 792 |
pass
|
| 793 |
if not limit or limit > 10000: |
| 794 |
limit = 10000
|
| 795 |
return objects[start:start + limit]
|
| 796 |
|
| 797 |
def _del_path(self, path): |
| 798 |
sql = '''delete from hashmaps where version_id in
|
| 799 |
(select version_id from versions where name = ?)'''
|
| 800 |
self.con.execute(sql, (path,))
|
| 801 |
sql = '''delete from metadata where version_id in
|
| 802 |
(select version_id from versions where name = ?)'''
|
| 803 |
self.con.execute(sql, (path,))
|
| 804 |
sql = '''delete from versions where name = ?'''
|
| 805 |
self.con.execute(sql, (path,))
|
| 806 |
sql = '''delete from permissions where name like ?'''
|
| 807 |
self.con.execute(sql, (path + '%',)) # Redundant. |
| 808 |
self.con.commit()
|