root / pithos / backends / simple.py @ 104626e3
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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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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 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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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 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 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 put_container(self, user, account, container): |
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"""Create a new container with the given name."""
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logger.debug("put_container: %s %s", account, container)
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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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path = os.path.join(account, container) |
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version_id = self._put_version(path, user)
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else:
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raise NameError('Container already exists') |
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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 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 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_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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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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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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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)
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if permissions is not None and user != account: |
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raise NotAllowedError
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self._can_read(user, account, src_container, src_name)
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self._can_write(user, account, dest_container, dest_name)
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self._get_containerinfo(account, src_container)
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if src_version is None: |
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src_path = self._get_objectinfo(account, src_container, src_name)[0] |
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else:
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src_path = os.path.join(account, src_container, src_name) |
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dest_path = self._get_containerinfo(account, dest_container)[0] |
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dest_path = os.path.join(dest_path, dest_name) |
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if permissions is not None: |
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r, w = self._check_permissions(dest_path, permissions)
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src_version_id, dest_version_id = self._copy_version(user, src_path, dest_path, not replace_meta, True, src_version) |
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for k, v in dest_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, (dest_path, r, w))
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self.con.commit()
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def move_object(self, user, account, src_container, src_name, dest_container, dest_name, dest_meta={}, replace_meta=False, permissions=None): |
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"""Move an object's data and metadata."""
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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)
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self.copy_object(user, account, src_container, src_name, dest_container, dest_name, dest_meta, replace_meta, permissions, None) |
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self.delete_object(user, account, src_container, src_name)
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def delete_object(self, user, account, container, name): |
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"""Delete an object."""
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logger.debug("delete_object: %s %s %s", account, container, name)
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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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self._put_version(path, user, 0, 1) |
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sql = 'delete from permissions where name = ?'
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self.con.execute(sql, (path,))
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self.con.commit()
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def list_versions(self, user, account, container, name): |
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"""Return a list of all (version, version_timestamp) tuples for an object."""
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logger.debug("list_versions: %s %s %s", account, container, name)
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self._can_read(user, account, container, name)
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# This will even show deleted versions.
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path = os.path.join(account, container, name) |
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sql = '''select distinct version_id, strftime('%s', tstamp) from versions where name = ? and hide = 0'''
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c = self.con.execute(sql, (path,))
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return [(int(x[0]), int(x[1])) for x in c.fetchall()] |
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def get_block(self, hash): |
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"""Return a block's data."""
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logger.debug("get_block: %s", hash) |
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c = self.con.execute('select data from blocks where block_id = ?', (hash,)) |
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row = c.fetchone() |
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if row:
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return str(row[0]) |
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else:
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raise NameError('Block does not exist') |
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|
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def put_block(self, data): |
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"""Create a block and return the hash."""
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logger.debug("put_block: %s", len(data)) |
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h = hashlib.new(self.hash_algorithm)
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h.update(data.rstrip('\x00'))
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hash = h.hexdigest() |
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sql = 'insert or ignore into blocks (block_id, data) values (?, ?)'
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self.con.execute(sql, (hash, buffer(data))) |
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self.con.commit()
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return hash |
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|
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def update_block(self, hash, data, offset=0): |
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"""Update a known block and return the hash."""
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|
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logger.debug("update_block: %s %s %s", hash, len(data), offset) |
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if offset == 0 and len(data) == self.block_size: |
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return self.put_block(data) |
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src_data = self.get_block(hash) |
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bs = self.block_size
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if offset < 0 or offset > bs or offset + len(data) > bs: |
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raise IndexError('Offset or data outside block limits') |
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dest_data = src_data[:offset] + data + src_data[offset + len(data):]
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return self.put_block(dest_data) |
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|
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def _sql_until(self, until=None): |
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"""Return the sql to get the latest versions until the timestamp given."""
|
| 407 |
if until is None: |
| 408 |
until = int(time.time())
|
| 409 |
sql = '''select version_id, name, strftime('%s', tstamp) as tstamp, size from versions v
|
| 410 |
where version_id = (select max(version_id) from versions
|
| 411 |
where v.name = name and tstamp <= datetime(%s, 'unixepoch'))
|
| 412 |
and hide = 0'''
|
| 413 |
return sql % ('%s', until) |
| 414 |
|
| 415 |
def _get_pathstats(self, path, until=None): |
| 416 |
"""Return count and sum of size of everything under path and latest timestamp."""
|
| 417 |
|
| 418 |
sql = 'select count(version_id), total(size), max(tstamp) from (%s) where name like ?'
|
| 419 |
sql = sql % self._sql_until(until)
|
| 420 |
c = self.con.execute(sql, (path + '/%',)) |
| 421 |
row = c.fetchone() |
| 422 |
tstamp = row[2] if row[2] is not None else 0 |
| 423 |
return int(row[0]), int(row[1]), int(tstamp) |
| 424 |
|
| 425 |
def _get_version(self, path, version=None): |
| 426 |
if version is None: |
| 427 |
sql = '''select version_id, user, strftime('%s', tstamp), size, hide from versions where name = ?
|
| 428 |
order by version_id desc limit 1'''
|
| 429 |
c = self.con.execute(sql, (path,))
|
| 430 |
row = c.fetchone() |
| 431 |
if not row or int(row[4]): |
| 432 |
raise NameError('Object does not exist') |
| 433 |
else:
|
| 434 |
# The database (sqlite) will not complain if the version is not an integer.
|
| 435 |
sql = '''select version_id, user, strftime('%s', tstamp), size from versions where name = ?
|
| 436 |
and version_id = ?'''
|
| 437 |
c = self.con.execute(sql, (path, version))
|
| 438 |
row = c.fetchone() |
| 439 |
if not row: |
| 440 |
raise IndexError('Version does not exist') |
| 441 |
return str(row[0]), str(row[1]), int(row[2]), int(row[3]) |
| 442 |
|
| 443 |
def _put_version(self, path, user, size=0, hide=0): |
| 444 |
sql = 'insert into versions (name, user, size, hide) values (?, ?, ?, ?)'
|
| 445 |
id = self.con.execute(sql, (path, user, size, hide)).lastrowid
|
| 446 |
self.con.commit()
|
| 447 |
return str(id) |
| 448 |
|
| 449 |
def _copy_version(self, user, src_path, dest_path, copy_meta=True, copy_data=True, src_version=None): |
| 450 |
if src_version is not None: |
| 451 |
src_version_id, muser, mtime, size = self._get_version(src_path, src_version)
|
| 452 |
else:
|
| 453 |
# Latest or create from scratch.
|
| 454 |
try:
|
| 455 |
src_version_id, muser, mtime, size = self._get_version(src_path)
|
| 456 |
except NameError: |
| 457 |
src_version_id = None
|
| 458 |
size = 0
|
| 459 |
if not copy_data: |
| 460 |
size = 0
|
| 461 |
dest_version_id = self._put_version(dest_path, user, size)
|
| 462 |
if copy_meta and src_version_id is not None: |
| 463 |
sql = 'insert into metadata select %s, key, value from metadata where version_id = ?'
|
| 464 |
sql = sql % dest_version_id |
| 465 |
self.con.execute(sql, (src_version_id,))
|
| 466 |
if copy_data and src_version_id is not None: |
| 467 |
sql = 'insert into hashmaps select %s, pos, block_id from hashmaps where version_id = ?'
|
| 468 |
sql = sql % dest_version_id |
| 469 |
self.con.execute(sql, (src_version_id,))
|
| 470 |
self.con.commit()
|
| 471 |
return src_version_id, dest_version_id
|
| 472 |
|
| 473 |
def _get_versioninfo(self, account, container, name, until=None): |
| 474 |
"""Return path, latest version, associated timestamp and size until the timestamp given."""
|
| 475 |
|
| 476 |
p = (account, container, name) |
| 477 |
try:
|
| 478 |
p = p[:p.index(None)]
|
| 479 |
except ValueError: |
| 480 |
pass
|
| 481 |
path = os.path.join(*p) |
| 482 |
sql = '''select version_id, tstamp, size from (%s) where name = ?'''
|
| 483 |
sql = sql % self._sql_until(until)
|
| 484 |
c = self.con.execute(sql, (path,))
|
| 485 |
row = c.fetchone() |
| 486 |
if row is None: |
| 487 |
raise NameError('Path does not exist') |
| 488 |
return path, str(row[0]), int(row[1]), int(row[2]) |
| 489 |
|
| 490 |
def _get_accountinfo(self, account, until=None): |
| 491 |
try:
|
| 492 |
path, version_id, mtime, size = self._get_versioninfo(account, None, None, until) |
| 493 |
return version_id, mtime
|
| 494 |
except:
|
| 495 |
raise NameError('Account does not exist') |
| 496 |
|
| 497 |
def _get_containerinfo(self, account, container, until=None): |
| 498 |
try:
|
| 499 |
path, version_id, mtime, size = self._get_versioninfo(account, container, None, until) |
| 500 |
return path, version_id, mtime
|
| 501 |
except:
|
| 502 |
raise NameError('Container does not exist') |
| 503 |
|
| 504 |
def _get_objectinfo(self, account, container, name, version=None): |
| 505 |
path = os.path.join(account, container, name) |
| 506 |
version_id, muser, mtime, size = self._get_version(path, version)
|
| 507 |
return path, version_id, muser, mtime, size
|
| 508 |
|
| 509 |
def _get_metadata(self, path, version): |
| 510 |
sql = 'select key, value from metadata where version_id = ?'
|
| 511 |
c = self.con.execute(sql, (version,))
|
| 512 |
return dict(c.fetchall()) |
| 513 |
|
| 514 |
def _put_metadata(self, user, path, meta, replace=False): |
| 515 |
"""Create a new version and store metadata."""
|
| 516 |
|
| 517 |
src_version_id, dest_version_id = self._copy_version(user, path, path, not replace, True) |
| 518 |
for k, v in meta.iteritems(): |
| 519 |
if not replace and v == '': |
| 520 |
sql = 'delete from metadata where version_id = ? and key = ?'
|
| 521 |
self.con.execute(sql, (dest_version_id, k))
|
| 522 |
else:
|
| 523 |
sql = 'insert or replace into metadata (version_id, key, value) values (?, ?, ?)'
|
| 524 |
self.con.execute(sql, (dest_version_id, k, v))
|
| 525 |
self.con.commit()
|
| 526 |
|
| 527 |
def _is_allowed(self, user, account, container, name, op='read'): |
| 528 |
if user == account:
|
| 529 |
return True |
| 530 |
path = os.path.join(account, container, name) |
| 531 |
perm_path, perms = self._get_permissions(path)
|
| 532 |
if op == 'read' and user in perms.get('read', []): |
| 533 |
return True |
| 534 |
if user in perms.get('write', []): |
| 535 |
return True |
| 536 |
return False |
| 537 |
|
| 538 |
def _can_read(self, user, account, container, name): |
| 539 |
if not self._is_allowed(user, account, container, name, 'read'): |
| 540 |
raise NotAllowedError
|
| 541 |
|
| 542 |
def _can_write(self, user, account, container, name): |
| 543 |
if not self._is_allowed(user, account, container, name, 'write'): |
| 544 |
raise NotAllowedError
|
| 545 |
|
| 546 |
def _check_permissions(self, path, permissions): |
| 547 |
# Check for existing permissions.
|
| 548 |
sql = '''select name from permissions
|
| 549 |
where name != ? and (name like ? or ? like name || ?)'''
|
| 550 |
c = self.con.execute(sql, (path, path + '%', path, '%')) |
| 551 |
rows = c.fetchall() |
| 552 |
if rows:
|
| 553 |
raise AttributeError('Permissions already set') |
| 554 |
|
| 555 |
# Format given permissions.
|
| 556 |
if len(permissions) == 0: |
| 557 |
return '', '' |
| 558 |
r = permissions.get('read', [])
|
| 559 |
w = permissions.get('write', [])
|
| 560 |
if True in [False or ',' in x for x in r]: |
| 561 |
raise ValueError('Bad characters in read permissions') |
| 562 |
if True in [False or ',' in x for x in w]: |
| 563 |
raise ValueError('Bad characters in write permissions') |
| 564 |
return ','.join(r), ','.join(w) |
| 565 |
|
| 566 |
def _get_permissions(self, path): |
| 567 |
# Check for permissions at path or above.
|
| 568 |
sql = 'select name, read, write from permissions where ? like name || ?'
|
| 569 |
c = self.con.execute(sql, (path, '%')) |
| 570 |
row = c.fetchone() |
| 571 |
if not row: |
| 572 |
return path, {}
|
| 573 |
|
| 574 |
name, r, w = row |
| 575 |
ret = {}
|
| 576 |
if w != '': |
| 577 |
ret['write'] = w.split(',') |
| 578 |
if r != '': |
| 579 |
ret['read'] = r.split(',') |
| 580 |
return name, ret
|
| 581 |
|
| 582 |
def _put_permissions(self, path, r, w): |
| 583 |
if r == '' and w == '': |
| 584 |
sql = 'delete from permissions where name = ?'
|
| 585 |
self.con.execute(sql, (path,))
|
| 586 |
else:
|
| 587 |
sql = 'insert or replace into permissions (name, read, write) values (?, ?, ?)'
|
| 588 |
self.con.execute(sql, (path, r, w))
|
| 589 |
self.con.commit()
|
| 590 |
|
| 591 |
def _list_objects(self, path, prefix='', delimiter=None, marker=None, limit=10000, virtual=True, keys=[], until=None): |
| 592 |
cont_prefix = path + '/'
|
| 593 |
if keys and len(keys) > 0: |
| 594 |
sql = '''select distinct o.name, o.version_id from (%s) o, metadata m where o.name like ? and
|
| 595 |
m.version_id = o.version_id and m.key in (%s) order by o.name'''
|
| 596 |
sql = sql % (self._sql_until(until), ', '.join('?' * len(keys))) |
| 597 |
param = (cont_prefix + prefix + '%',) + tuple(keys) |
| 598 |
else:
|
| 599 |
sql = 'select name, version_id from (%s) where name like ? order by name'
|
| 600 |
sql = sql % self._sql_until(until)
|
| 601 |
param = (cont_prefix + prefix + '%',)
|
| 602 |
c = self.con.execute(sql, param)
|
| 603 |
objects = [(x[0][len(cont_prefix):], x[1]) for x in c.fetchall()] |
| 604 |
if delimiter:
|
| 605 |
pseudo_objects = [] |
| 606 |
for x in objects: |
| 607 |
pseudo_name = x[0]
|
| 608 |
i = pseudo_name.find(delimiter, len(prefix))
|
| 609 |
if not virtual: |
| 610 |
# If the delimiter is not found, or the name ends
|
| 611 |
# with the delimiter's first occurence.
|
| 612 |
if i == -1 or len(pseudo_name) == i + len(delimiter): |
| 613 |
pseudo_objects.append(x) |
| 614 |
else:
|
| 615 |
# If the delimiter is found, keep up to (and including) the delimiter.
|
| 616 |
if i != -1: |
| 617 |
pseudo_name = pseudo_name[:i + len(delimiter)]
|
| 618 |
if pseudo_name not in [y[0] for y in pseudo_objects]: |
| 619 |
if pseudo_name == x[0]: |
| 620 |
pseudo_objects.append(x) |
| 621 |
else:
|
| 622 |
pseudo_objects.append((pseudo_name, None))
|
| 623 |
objects = pseudo_objects |
| 624 |
|
| 625 |
start = 0
|
| 626 |
if marker:
|
| 627 |
try:
|
| 628 |
start = [x[0] for x in objects].index(marker) + 1 |
| 629 |
except ValueError: |
| 630 |
pass
|
| 631 |
if not limit or limit > 10000: |
| 632 |
limit = 10000
|
| 633 |
return objects[start:start + limit]
|
| 634 |
|
| 635 |
def _del_path(self, path): |
| 636 |
sql = '''delete from hashmaps where version_id in
|
| 637 |
(select version_id from versions where name = ?)'''
|
| 638 |
self.con.execute(sql, (path,))
|
| 639 |
sql = '''delete from metadata where version_id in
|
| 640 |
(select version_id from versions where name = ?)'''
|
| 641 |
self.con.execute(sql, (path,))
|
| 642 |
sql = '''delete from versions where name = ?'''
|
| 643 |
self.con.execute(sql, (path,))
|
| 644 |
sql = '''delete from permissions where name like ?'''
|
| 645 |
self.con.execute(sql, (path + '%',)) # Redundant. |
| 646 |
self.con.commit()
|