import time
import sqlite3
import logging
-import types
import hashlib
-import shutil
-import pickle
+import binascii
from base import NotAllowedError, BaseBackend
-
+from lib.hashfiler import Mapper, Blocker
+from django.utils.encoding import smart_unicode, smart_str
logger = logging.getLogger(__name__)
+def backend_method(func=None, autocommit=1):
+ if func is None:
+ def fn(func):
+ return backend_method(func, autocommit)
+ return fn
+
+ if not autocommit:
+ return func
+ def fn(self, *args, **kw):
+ self.con.execute('begin deferred')
+ try:
+ ret = func(self, *args, **kw)
+ self.con.commit()
+ return ret
+ except:
+ self.con.rollback()
+ raise
+ return fn
+
class SimpleBackend(BaseBackend):
"""A simple backend.
Uses SQLite for storage.
"""
- # TODO: Automatic/manual clean-up after a time interval.
+ # TODO: Create account if not present in all functions.
- def __init__(self, db):
- self.hash_algorithm = 'sha1'
- self.block_size = 128 * 1024 # 128KB
+ def __init__(self, db, db_options):
+ self.hash_algorithm = 'sha256'
+ self.block_size = 4 * 1024 * 1024 # 4MB
self.default_policy = {'quota': 0, 'versioning': 'auto'}
basepath = os.path.split(db)[0]
if basepath and not os.path.exists(basepath):
os.makedirs(basepath)
+ if not os.path.isdir(basepath):
+ raise RuntimeError("Cannot open database at '%s'" % (db,))
- self.con = sqlite3.connect(db, check_same_thread=False)
+ self.con = sqlite3.connect(basepath + '/db', check_same_thread=False)
sql = '''pragma foreign_keys = on'''
self.con.execute(sql)
foreign key (version_id) references versions(version_id)
on delete cascade)'''
self.con.execute(sql)
- sql = '''create table if not exists hashmaps (
- version_id integer,
- pos integer,
- block_id text,
- primary key (version_id, pos)
- foreign key (version_id) references versions(version_id)
- on delete cascade)'''
- self.con.execute(sql)
- sql = '''create table if not exists blocks (
- block_id text, data blob, primary key (block_id))'''
- self.con.execute(sql)
-
sql = '''create table if not exists policy (
name text, key text, value text, primary key (name, key))'''
self.con.execute(sql)
+ # Access control tables.
sql = '''create table if not exists groups (
- account text, name text, users text, primary key (account, name))'''
+ account text, gname text, user text)'''
self.con.execute(sql)
sql = '''create table if not exists permissions (
- name text, read text, write text, primary key (name))'''
+ name text, op text, user text)'''
self.con.execute(sql)
sql = '''create table if not exists public (
name text, primary key (name))'''
self.con.execute(sql)
+
self.con.commit()
+
+ params = {'blocksize': self.block_size,
+ 'blockpath': basepath + '/blocks',
+ 'hashtype': self.hash_algorithm}
+ self.blocker = Blocker(**params)
+
+ params = {'mappath': basepath + '/maps',
+ 'namelen': self.blocker.hashlen}
+ self.mapper = Mapper(**params)
+
+ @backend_method
+ def list_accounts(self, user, marker=None, limit=10000):
+ """Return a list of accounts the user can access."""
+
+ allowed = self._allowed_accounts(user)
+ start, limit = self._list_limits(allowed, marker, limit)
+ return allowed[start:start + limit]
+ @backend_method
def get_account_meta(self, user, account, until=None):
"""Return a dictionary with the account metadata."""
logger.debug("get_account_meta: %s %s", account, until)
if user != account:
- raise NotAllowedError
+ if until or account not in self._allowed_accounts(user):
+ raise NotAllowedError
+ else:
+ self._create_account(user, account)
try:
version_id, mtime = self._get_accountinfo(account, until)
except NameError:
+ # Account does not exist before until.
version_id = None
- mtime = 0
+ mtime = until
count, bytes, tstamp = self._get_pathstats(account, until)
if mtime > tstamp:
tstamp = mtime
row = c.fetchone()
count = row[0]
- meta = self._get_metadata(account, version_id)
- meta.update({'name': account, 'count': count, 'bytes': bytes})
- if modified:
- meta.update({'modified': modified})
- if until is not None:
- meta.update({'until_timestamp': tstamp})
+ if user != account:
+ meta = {'name': account}
+ else:
+ meta = self._get_metadata(account, version_id)
+ meta.update({'name': account, 'count': count, 'bytes': bytes})
+ if until is not None:
+ meta.update({'until_timestamp': tstamp})
+ meta.update({'modified': modified})
return meta
+ @backend_method
def update_account_meta(self, user, account, meta, replace=False):
"""Update the metadata associated with the account."""
logger.debug("update_account_meta: %s %s %s", account, meta, replace)
if user != account:
raise NotAllowedError
- self._put_metadata(user, account, meta, replace)
+ self._put_metadata(user, account, meta, replace, False)
+ @backend_method
def get_account_groups(self, user, account):
"""Return a dictionary with the user groups defined for this account."""
logger.debug("get_account_groups: %s", account)
if user != account:
- raise NotAllowedError
+ if account not in self._allowed_accounts(user):
+ raise NotAllowedError
+ return {}
+ self._create_account(user, account)
return self._get_groups(account)
+ @backend_method
def update_account_groups(self, user, account, groups, replace=False):
"""Update the groups associated with the account."""
logger.debug("update_account_groups: %s %s %s", account, groups, replace)
if user != account:
raise NotAllowedError
- for k, v in groups.iteritems():
- if True in [False or ',' in x for x in v]:
- raise ValueError('Bad characters in groups')
- if replace:
- sql = 'delete from groups where account = ?'
- self.con.execute(sql, (account,))
- for k, v in groups.iteritems():
- if len(v) == 0:
- if not replace:
- sql = 'delete from groups where account = ? and name = ?'
- self.con.execute(sql, (account, k))
- else:
- sql = 'insert or replace into groups (account, name, users) values (?, ?, ?)'
- self.con.execute(sql, (account, k, ','.join(v)))
- self.con.commit()
+ self._create_account(user, account)
+ self._check_groups(groups)
+ self._put_groups(account, groups, replace)
+ @backend_method
def put_account(self, user, account):
"""Create a new account with the given name."""
pass
else:
raise NameError('Account already exists')
- version_id = self._put_version(account, user)
- self.con.commit()
+ self._put_version(account, user)
+ @backend_method
def delete_account(self, user, account):
"""Delete the account with the given name."""
raise IndexError('Account is not empty')
sql = 'delete from versions where name = ?'
self.con.execute(sql, (account,))
- sql = 'delete from groups where name = ?'
- self.con.execute(sql, (account,))
- self.con.commit()
+ self._del_groups(account)
- def list_containers(self, user, account, marker=None, limit=10000, until=None):
+ @backend_method
+ def list_containers(self, user, account, marker=None, limit=10000, shared=False, until=None):
"""Return a list of containers existing under an account."""
logger.debug("list_containers: %s %s %s %s", account, marker, limit, until)
if user != account:
- raise NotAllowedError
- return self._list_objects(account, '', '/', marker, limit, False, [], until)
+ if until or account not in self._allowed_accounts(user):
+ raise NotAllowedError
+ allowed = self._allowed_containers(user, account)
+ start, limit = self._list_limits(allowed, marker, limit)
+ return allowed[start:start + limit]
+ else:
+ if shared:
+ allowed = [x.split('/', 2)[1] for x in self._shared_paths(account)]
+ start, limit = self._list_limits(allowed, marker, limit)
+ return allowed[start:start + limit]
+ return [x[0] for x in self._list_objects(account, '', '/', marker, limit, False, [], until)]
+ @backend_method
def get_container_meta(self, user, account, container, until=None):
"""Return a dictionary with the container metadata."""
logger.debug("get_container_meta: %s %s %s", account, container, until)
if user != account:
- raise NotAllowedError
+ if until or container not in self._allowed_containers(user, account):
+ raise NotAllowedError
path, version_id, mtime = self._get_containerinfo(account, container, until)
count, bytes, tstamp = self._get_pathstats(path, until)
if mtime > tstamp:
if mtime > modified:
modified = mtime
- meta = self._get_metadata(path, version_id)
- meta.update({'name': container, 'count': count, 'bytes': bytes, 'modified': modified})
- if until is not None:
- meta.update({'until_timestamp': tstamp})
+ if user != account:
+ meta = {'name': container, 'modified': modified}
+ else:
+ meta = self._get_metadata(path, version_id)
+ meta.update({'name': container, 'count': count, 'bytes': bytes, 'modified': modified})
+ if until is not None:
+ meta.update({'until_timestamp': tstamp})
return meta
+ @backend_method
def update_container_meta(self, user, account, container, meta, replace=False):
"""Update the metadata associated with the container."""
if user != account:
raise NotAllowedError
path, version_id, mtime = self._get_containerinfo(account, container)
- self._put_metadata(user, path, meta, replace)
+ self._put_metadata(user, path, meta, replace, False)
+ @backend_method
def get_container_policy(self, user, account, container):
"""Return a dictionary with the container policy."""
logger.debug("get_container_policy: %s %s", account, container)
if user != account:
- raise NotAllowedError
+ if container not in self._allowed_containers(user, account):
+ raise NotAllowedError
+ return {}
path = self._get_containerinfo(account, container)[0]
return self._get_policy(path)
+ @backend_method
def update_container_policy(self, user, account, container, policy, replace=False):
"""Update the policy associated with the account."""
for k, v in policy.iteritems():
sql = 'insert or replace into policy (name, key, value) values (?, ?, ?)'
self.con.execute(sql, (path, k, v))
- self.con.commit()
+ @backend_method
def put_container(self, user, account, container, policy=None):
"""Create a new container with the given name."""
raise NameError('Container already exists')
if policy:
self._check_policy(policy)
- path = os.path.join(account, container)
- version_id = self._put_version(path, user)
+ path = '/'.join((account, container))
+ version_id = self._put_version(path, user)[0]
for k, v in self.default_policy.iteritems():
if k not in policy:
policy[k] = v
for k, v in policy.iteritems():
sql = 'insert or replace into policy (name, key, value) values (?, ?, ?)'
self.con.execute(sql, (path, k, v))
- self.con.commit()
+ @backend_method
def delete_container(self, user, account, container, until=None):
"""Delete/purge the container with the given name."""
path, version_id, mtime = self._get_containerinfo(account, container)
if until is not None:
- sql = '''select version_id from versions where name like ? and tstamp <= ?'''
+ sql = '''select version_id from versions where name like ? and tstamp <= ?
+ and version_id not in (select version_id from (%s))'''
+ sql = sql % self._sql_until() # Do not delete current versions.
c = self.con.execute(sql, (path + '/%', until))
for v in [x[0] for x in c.fetchall()]:
self._del_version(v)
- self.con.commit()
return
count = self._get_pathstats(path)[0]
self.con.execute(sql, (path, path + '/%',))
sql = 'delete from policy where name = ?'
self.con.execute(sql, (path,))
- self._copy_version(user, account, account, True, True) # New account version (for timestamp update).
+ self._copy_version(user, account, account, True, False) # New account version (for timestamp update).
- def list_objects(self, user, account, container, prefix='', delimiter=None, marker=None, limit=10000, virtual=True, keys=[], until=None):
+ @backend_method
+ def list_objects(self, user, account, container, prefix='', delimiter=None, marker=None, limit=10000, virtual=True, keys=[], shared=False, until=None):
"""Return a list of objects existing under a container."""
- logger.debug("list_objects: %s %s %s %s %s %s %s %s %s", account, container, prefix, delimiter, marker, limit, virtual, keys, until)
+ logger.debug("list_objects: %s %s %s %s %s %s %s %s %s %s", account, container, prefix, delimiter, marker, limit, virtual, keys, shared, until)
+ allowed = []
if user != account:
- raise NotAllowedError
+ if until:
+ raise NotAllowedError
+ allowed = self._allowed_paths(user, '/'.join((account, container)))
+ if not allowed:
+ raise NotAllowedError
+ else:
+ if shared:
+ allowed = self._shared_paths('/'.join((account, container)))
path, version_id, mtime = self._get_containerinfo(account, container, until)
- return self._list_objects(path, prefix, delimiter, marker, limit, virtual, keys, until)
+ return self._list_objects(path, prefix, delimiter, marker, limit, virtual, keys, until, allowed)
+ @backend_method
def list_object_meta(self, user, account, container, until=None):
"""Return a list with all the container's object meta keys."""
logger.debug("list_object_meta: %s %s %s", account, container, until)
+ allowed = []
if user != account:
- raise NotAllowedError
+ if until:
+ raise NotAllowedError
+ allowed = self._allowed_paths(user, '/'.join((account, container)))
+ if not allowed:
+ raise NotAllowedError
path, version_id, mtime = self._get_containerinfo(account, container, until)
sql = '''select distinct m.key from (%s) o, metadata m
where m.version_id = o.version_id and o.name like ?'''
sql = sql % self._sql_until(until)
- c = self.con.execute(sql, (path + '/%',))
+ param = (path + '/%',)
+ if allowed:
+ for x in allowed:
+ sql += ' and o.name like ?'
+ param += (x,)
+ c = self.con.execute(sql, param)
return [x[0] for x in c.fetchall()]
+ @backend_method
def get_object_meta(self, user, account, container, name, version=None):
"""Return a dictionary with the object metadata."""
meta.update({'modified': modified, 'modified_by': muser})
return meta
+ @backend_method
def update_object_meta(self, user, account, container, name, meta, replace=False):
"""Update the metadata associated with the object."""
logger.debug("update_object_meta: %s %s %s %s %s", account, container, name, meta, replace)
self._can_write(user, account, container, name)
path, version_id, muser, mtime, size = self._get_objectinfo(account, container, name)
- self._put_metadata(user, path, meta, replace)
+ return self._put_metadata(user, path, meta, replace)
+ @backend_method
def get_object_permissions(self, user, account, container, name):
"""Return the path from which this object gets its permissions from,\
along with a dictionary containing the permissions."""
path = self._get_objectinfo(account, container, name)[0]
return self._get_permissions(path)
+ @backend_method
def update_object_permissions(self, user, account, container, name, permissions):
"""Update the permissions associated with the object."""
r, w = self._check_permissions(path, permissions)
self._put_permissions(path, r, w)
+ @backend_method
def get_object_public(self, user, account, container, name):
"""Return the public URL of the object if applicable."""
return '/public/' + path
return None
+ @backend_method
def update_object_public(self, user, account, container, name, public):
"""Update the public status of the object."""
path = self._get_objectinfo(account, container, name)[0]
self._put_public(path, public)
+ @backend_method
def get_object_hashmap(self, user, account, container, name, version=None):
"""Return the object's size and a list with partial hashes."""
logger.debug("get_object_hashmap: %s %s %s %s", account, container, name, version)
self._can_read(user, account, container, name)
path, version_id, muser, mtime, size = self._get_objectinfo(account, container, name, version)
- sql = 'select block_id from hashmaps where version_id = ? order by pos asc'
- c = self.con.execute(sql, (version_id,))
- hashmap = [x[0] for x in c.fetchall()]
- return size, hashmap
+ hashmap = self.mapper.map_retr(version_id)
+ return size, [binascii.hexlify(x) for x in hashmap]
+ @backend_method
def update_object_hashmap(self, user, account, container, name, size, hashmap, meta={}, replace_meta=False, permissions=None):
"""Create/update an object with the specified size and partial hashes."""
if permissions is not None and user != account:
raise NotAllowedError
self._can_write(user, account, container, name)
- missing = []
- for i in range(len(hashmap)):
- sql = 'select count(*) from blocks where block_id = ?'
- c = self.con.execute(sql, (hashmap[i],))
- if c.fetchone()[0] == 0:
- missing.append(hashmap[i])
+ missing = self.blocker.block_ping([binascii.unhexlify(x) for x in hashmap])
if missing:
ie = IndexError()
ie.data = missing
raise ie
path = self._get_containerinfo(account, container)[0]
- path = os.path.join(path, name)
+ path = '/'.join((path, name))
if permissions is not None:
r, w = self._check_permissions(path, permissions)
src_version_id, dest_version_id = self._copy_version(user, path, path, not replace_meta, False)
sql = 'update versions set size = ? where version_id = ?'
self.con.execute(sql, (size, dest_version_id))
- # TODO: Check for block_id existence.
- for i in range(len(hashmap)):
- sql = 'insert or replace into hashmaps (version_id, pos, block_id) values (?, ?, ?)'
- self.con.execute(sql, (dest_version_id, i, hashmap[i]))
+ self.mapper.map_stor(dest_version_id, [binascii.unhexlify(x) for x in hashmap])
for k, v in meta.iteritems():
sql = 'insert or replace into metadata (version_id, key, value) values (?, ?, ?)'
self.con.execute(sql, (dest_version_id, k, v))
if permissions is not None:
- sql = 'insert or replace into permissions (name, read, write) values (?, ?, ?)'
- self.con.execute(sql, (path, r, w))
- self.con.commit()
+ self._put_permissions(path, r, w)
+ return dest_version_id
+ @backend_method
def copy_object(self, user, account, src_container, src_name, dest_container, dest_name, dest_meta={}, replace_meta=False, permissions=None, src_version=None):
"""Copy an object's data and metadata."""
if src_version is None:
src_path = self._get_objectinfo(account, src_container, src_name)[0]
else:
- src_path = os.path.join(account, src_container, src_name)
+ src_path = '/'.join((account, src_container, src_name))
dest_path = self._get_containerinfo(account, dest_container)[0]
- dest_path = os.path.join(dest_path, dest_name)
+ dest_path = '/'.join((dest_path, dest_name))
if permissions is not None:
r, w = self._check_permissions(dest_path, permissions)
src_version_id, dest_version_id = self._copy_version(user, src_path, dest_path, not replace_meta, True, src_version)
sql = 'insert or replace into metadata (version_id, key, value) values (?, ?, ?)'
self.con.execute(sql, (dest_version_id, k, v))
if permissions is not None:
- sql = 'insert or replace into permissions (name, read, write) values (?, ?, ?)'
- self.con.execute(sql, (dest_path, r, w))
- self.con.commit()
+ self._put_permissions(dest_path, r, w)
+ return dest_version_id
+ @backend_method
def move_object(self, user, account, src_container, src_name, dest_container, dest_name, dest_meta={}, replace_meta=False, permissions=None):
"""Move an object's data and metadata."""
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)
- self.copy_object(user, account, src_container, src_name, dest_container, dest_name, dest_meta, replace_meta, permissions, None)
+ dest_version_id = self.copy_object(user, account, src_container, src_name, dest_container, dest_name, dest_meta, replace_meta, permissions, None)
self.delete_object(user, account, src_container, src_name)
+ return dest_version_id
+ @backend_method
def delete_object(self, user, account, container, name, until=None):
"""Delete/purge an object."""
raise NotAllowedError
if until is not None:
- path = os.path.join(account, container, name)
+ path = '/'.join((account, container, name))
sql = '''select version_id from versions where name = ? and tstamp <= ?'''
c = self.con.execute(sql, (path, until))
for v in [x[0] in c.fetchall()]:
pass
else:
self._del_sharing(path)
- self.con.commit()
return
path = self._get_objectinfo(account, container, name)[0]
self._put_version(path, user, 0, 1)
self._del_sharing(path)
+ @backend_method
def list_versions(self, user, account, container, name):
"""Return a list of all (version, version_timestamp) tuples for an object."""
logger.debug("list_versions: %s %s %s", account, container, name)
self._can_read(user, account, container, name)
# This will even show deleted versions.
- path = os.path.join(account, container, name)
+ path = '/'.join((account, container, name))
sql = '''select distinct version_id, tstamp from versions where name = ? and hide = 0'''
c = self.con.execute(sql, (path,))
return [(int(x[0]), int(x[1])) for x in c.fetchall()]
+ @backend_method(autocommit=0)
def get_block(self, hash):
"""Return a block's data."""
logger.debug("get_block: %s", hash)
- c = self.con.execute('select data from blocks where block_id = ?', (hash,))
- row = c.fetchone()
- if row:
- return str(row[0])
- else:
+ blocks = self.blocker.block_retr((binascii.unhexlify(hash),))
+ if not blocks:
raise NameError('Block does not exist')
+ return blocks[0]
+ @backend_method(autocommit=0)
def put_block(self, data):
- """Create a block and return the hash."""
+ """Store a block and return the hash."""
logger.debug("put_block: %s", len(data))
- h = hashlib.new(self.hash_algorithm)
- h.update(data.rstrip('\x00'))
- hash = h.hexdigest()
- sql = 'insert or ignore into blocks (block_id, data) values (?, ?)'
- self.con.execute(sql, (hash, buffer(data)))
- self.con.commit()
- return hash
+ hashes, absent = self.blocker.block_stor((data,))
+ return binascii.hexlify(hashes[0])
+ @backend_method(autocommit=0)
def update_block(self, hash, data, offset=0):
"""Update a known block and return the hash."""
logger.debug("update_block: %s %s %s", hash, len(data), offset)
if offset == 0 and len(data) == self.block_size:
return self.put_block(data)
- src_data = self.get_block(hash)
- bs = self.block_size
- if offset < 0 or offset > bs or offset + len(data) > bs:
- raise IndexError('Offset or data outside block limits')
- dest_data = src_data[:offset] + data + src_data[offset + len(data):]
- return self.put_block(dest_data)
+ h, e = self.blocker.block_delta(binascii.unhexlify(hash), ((offset, data),))
+ return binascii.hexlify(h)
def _sql_until(self, until=None):
"""Return the sql to get the latest versions until the timestamp given."""
row = c.fetchone()
if not row:
raise IndexError('Version does not exist')
- return str(row[0]), str(row[1]), int(row[2]), int(row[3])
+ return smart_str(row[0]), smart_str(row[1]), int(row[2]), int(row[3])
def _put_version(self, path, user, size=0, hide=0):
tstamp = int(time.time())
sql = 'insert into versions (name, user, tstamp, size, hide) values (?, ?, ?, ?, ?)'
id = self.con.execute(sql, (path, user, tstamp, size, hide)).lastrowid
- self.con.commit()
- return str(id)
+ return str(id), tstamp
def _copy_version(self, user, src_path, dest_path, copy_meta=True, copy_data=True, src_version=None):
if src_version is not None:
size = 0
if not copy_data:
size = 0
- dest_version_id = self._put_version(dest_path, user, size)
+ dest_version_id = self._put_version(dest_path, user, size)[0]
if copy_meta and src_version_id is not None:
sql = 'insert into metadata select %s, key, value from metadata where version_id = ?'
sql = sql % dest_version_id
self.con.execute(sql, (src_version_id,))
if copy_data and src_version_id is not None:
- sql = 'insert into hashmaps select %s, pos, block_id from hashmaps where version_id = ?'
- sql = sql % dest_version_id
- self.con.execute(sql, (src_version_id,))
- self.con.commit()
+ # TODO: Copy properly.
+ hashmap = self.mapper.map_retr(src_version_id)
+ self.mapper.map_stor(dest_version_id, hashmap)
return src_version_id, dest_version_id
def _get_versioninfo(self, account, container, name, until=None):
p = p[:p.index(None)]
except ValueError:
pass
- path = os.path.join(*p)
+ path = '/'.join(p)
sql = '''select version_id, tstamp, size from (%s) where name = ?'''
sql = sql % self._sql_until(until)
c = self.con.execute(sql, (path,))
raise NameError('Container does not exist')
def _get_objectinfo(self, account, container, name, version=None):
- path = os.path.join(account, container, name)
+ path = '/'.join((account, container, name))
version_id, muser, mtime, size = self._get_version(path, version)
return path, version_id, muser, mtime, size
+ def _create_account(self, user, account):
+ try:
+ self._get_accountinfo(account)
+ except NameError:
+ self._put_version(account, user)
+
def _get_metadata(self, path, version):
sql = 'select key, value from metadata where version_id = ?'
c = self.con.execute(sql, (version,))
return dict(c.fetchall())
- def _put_metadata(self, user, path, meta, replace=False):
+ def _put_metadata(self, user, path, meta, replace=False, copy_data=True):
"""Create a new version and store metadata."""
- src_version_id, dest_version_id = self._copy_version(user, path, path, not replace, True)
+ src_version_id, dest_version_id = self._copy_version(user, path, path, not replace, copy_data)
for k, v in meta.iteritems():
if not replace and v == '':
sql = 'delete from metadata where version_id = ? and key = ?'
else:
sql = 'insert or replace into metadata (version_id, key, value) values (?, ?, ?)'
self.con.execute(sql, (dest_version_id, k, v))
- self.con.commit()
-
- def _get_groups(self, account):
- sql = 'select name, users from groups where account = ?'
- c = self.con.execute(sql, (account,))
- return dict([(x[0], x[1].split(',')) for x in c.fetchall()])
+ return dest_version_id
def _check_policy(self, policy):
for k in policy.keys():
c = self.con.execute(sql, (path,))
return dict(c.fetchall())
- def _is_allowed(self, user, account, container, name, op='read'):
- if user == account:
- return True
- path = os.path.join(account, container, name)
- if op == 'read' and self._get_public(path):
- return True
- perm_path, perms = self._get_permissions(path)
-
- # Expand groups.
- for x in ('read', 'write'):
- g_perms = []
- for y in perms.get(x, []):
- groups = self._get_groups(account)
- if y in groups: #it's a group
- for g_name in groups[y]:
- g_perms.append(g_name)
- else: #it's a user
- g_perms.append(y)
- perms[x] = g_perms
+ def _list_limits(self, listing, marker, limit):
+ start = 0
+ if marker:
+ try:
+ start = listing.index(marker) + 1
+ except ValueError:
+ pass
+ if not limit or limit > 10000:
+ limit = 10000
+ return start, limit
+
+ def _list_objects(self, path, prefix='', delimiter=None, marker=None, limit=10000, virtual=True, keys=[], until=None, allowed=[]):
+ cont_prefix = path + '/'
+ if keys and len(keys) > 0:
+ sql = '''select distinct o.name, o.version_id from (%s) o, metadata m where o.name like ? and
+ m.version_id = o.version_id and m.key in (%s)'''
+ sql = sql % (self._sql_until(until), ', '.join('?' * len(keys)))
+ param = (cont_prefix + prefix + '%',) + tuple(keys)
+ if allowed:
+ sql += ' and (' + ' or '.join(('o.name like ?',) * len(allowed)) + ')'
+ param += tuple([x + '%' for x in allowed])
+ sql += ' order by o.name'
+ else:
+ sql = 'select name, version_id from (%s) where name like ?'
+ sql = sql % self._sql_until(until)
+ param = (cont_prefix + prefix + '%',)
+ if allowed:
+ sql += ' and (' + ' or '.join(('name like ?',) * len(allowed)) + ')'
+ param += tuple([x + '%' for x in allowed])
+ sql += ' order by name'
+ c = self.con.execute(sql, param)
+ objects = [(x[0][len(cont_prefix):], x[1]) for x in c.fetchall()]
+ if delimiter:
+ pseudo_objects = []
+ for x in objects:
+ pseudo_name = x[0]
+ i = pseudo_name.find(delimiter, len(prefix))
+ if not virtual:
+ # If the delimiter is not found, or the name ends
+ # with the delimiter's first occurence.
+ if i == -1 or len(pseudo_name) == i + len(delimiter):
+ pseudo_objects.append(x)
+ else:
+ # If the delimiter is found, keep up to (and including) the delimiter.
+ if i != -1:
+ pseudo_name = pseudo_name[:i + len(delimiter)]
+ if pseudo_name not in [y[0] for y in pseudo_objects]:
+ if pseudo_name == x[0]:
+ pseudo_objects.append(x)
+ else:
+ pseudo_objects.append((pseudo_name, None))
+ objects = pseudo_objects
- if op == 'read' and user in perms.get('read', []):
- return True
- if user in perms.get('write', []):
- return True
- return False
+ start, limit = self._list_limits([x[0] for x in objects], marker, limit)
+ return objects[start:start + limit]
- def _can_read(self, user, account, container, name):
- if not self._is_allowed(user, account, container, name, 'read'):
- raise NotAllowedError
+ def _del_version(self, version):
+ self.mapper.map_remv(version)
+ sql = 'delete from versions where version_id = ?'
+ self.con.execute(sql, (version,))
- def _can_write(self, user, account, container, name):
- if not self._is_allowed(user, account, container, name, 'write'):
- raise NotAllowedError
+ # Access control functions.
+
+ def _check_groups(self, groups):
+ # Example follows.
+ # for k, v in groups.iteritems():
+ # if True in [False or ',' in x for x in v]:
+ # raise ValueError('Bad characters in groups')
+ pass
+
+ def _get_groups(self, account):
+ sql = 'select gname, user from groups where account = ?'
+ c = self.con.execute(sql, (account,))
+ groups = {}
+ for gname, user in c.fetchall():
+ if gname not in groups:
+ groups[gname] = []
+ groups[gname].append(user)
+ return groups
+
+ def _put_groups(self, account, groups, replace=False):
+ if replace:
+ self._del_groups(account)
+ for k, v in groups.iteritems():
+ sql = 'delete from groups where account = ? and gname = ?'
+ self.con.execute(sql, (account, k))
+ if v:
+ sql = 'insert into groups (account, gname, user) values (?, ?, ?)'
+ self.con.executemany(sql, [(account, k, x) for x in v])
+
+ def _del_groups(self, account):
+ sql = 'delete from groups where account = ?'
+ self.con.execute(sql, (account,))
def _check_permissions(self, path, permissions):
# Check for existing permissions.
sql = '''select name from permissions
where name != ? and (name like ? or ? like name || ?)'''
c = self.con.execute(sql, (path, path + '%', path, '%'))
- row = c.fetchone()
- if row:
+ rows = c.fetchall()
+ if rows:
ae = AttributeError()
- ae.data = row[0]
+ ae.data = rows
raise ae
# Format given permissions.
if len(permissions) == 0:
- return '', ''
+ return [], []
r = permissions.get('read', [])
w = permissions.get('write', [])
- if True in [False or ',' in x for x in r]:
- raise ValueError('Bad characters in read permissions')
- if True in [False or ',' in x for x in w]:
- raise ValueError('Bad characters in write permissions')
- return ','.join(r), ','.join(w)
+ # Examples follow.
+ # if True in [False or ',' in x for x in r]:
+ # raise ValueError('Bad characters in read permissions')
+ # if True in [False or ',' in x for x in w]:
+ # raise ValueError('Bad characters in write permissions')
+ return r, w
def _get_permissions(self, path):
# Check for permissions at path or above.
- sql = 'select name, read, write from permissions where ? like name || ?'
+ sql = 'select name, op, user from permissions where ? like name || ?'
c = self.con.execute(sql, (path, '%'))
- row = c.fetchone()
- if not row:
- return path, {}
-
- name, r, w = row
- ret = {}
- if w != '':
- ret['write'] = w.split(',')
- if r != '':
- ret['read'] = r.split(',')
- return name, ret
+ name = path
+ perms = {} # Return nothing, if nothing is set.
+ for row in c.fetchall():
+ name = row[0]
+ op = row[1]
+ user = row[2]
+ if op not in perms:
+ perms[op] = []
+ perms[op].append(user)
+ return name, perms
def _put_permissions(self, path, r, w):
- if r == '' and w == '':
- sql = 'delete from permissions where name = ?'
- self.con.execute(sql, (path,))
- else:
- sql = 'insert or replace into permissions (name, read, write) values (?, ?, ?)'
- self.con.execute(sql, (path, r, w))
- self.con.commit()
+ sql = 'delete from permissions where name = ?'
+ self.con.execute(sql, (path,))
+ sql = 'insert into permissions (name, op, user) values (?, ?, ?)'
+ if r:
+ self.con.executemany(sql, [(path, 'read', x) for x in r])
+ if w:
+ self.con.executemany(sql, [(path, 'write', x) for x in w])
def _get_public(self, path):
sql = 'select name from public where name = ?'
else:
sql = 'insert or replace into public (name) values (?)'
self.con.execute(sql, (path,))
- self.con.commit()
def _del_sharing(self, path):
sql = 'delete from permissions where name = ?'
self.con.execute(sql, (path,))
sql = 'delete from public where name = ?'
self.con.execute(sql, (path,))
- self.con.commit()
- def _list_objects(self, path, prefix='', delimiter=None, marker=None, limit=10000, virtual=True, keys=[], until=None):
- cont_prefix = path + '/'
- if keys and len(keys) > 0:
- sql = '''select distinct o.name, o.version_id from (%s) o, metadata m where o.name like ? and
- m.version_id = o.version_id and m.key in (%s) order by o.name'''
- sql = sql % (self._sql_until(until), ', '.join('?' * len(keys)))
- param = (cont_prefix + prefix + '%',) + tuple(keys)
- else:
- sql = 'select name, version_id from (%s) where name like ? order by name'
- sql = sql % self._sql_until(until)
- param = (cont_prefix + prefix + '%',)
- c = self.con.execute(sql, param)
- objects = [(x[0][len(cont_prefix):], x[1]) for x in c.fetchall()]
- if delimiter:
- pseudo_objects = []
- for x in objects:
- pseudo_name = x[0]
- i = pseudo_name.find(delimiter, len(prefix))
- if not virtual:
- # If the delimiter is not found, or the name ends
- # with the delimiter's first occurence.
- if i == -1 or len(pseudo_name) == i + len(delimiter):
- pseudo_objects.append(x)
+ def _is_allowed(self, user, account, container, name, op='read'):
+ if smart_unicode(user) == smart_unicode(account):
+ return True
+ path = '/'.join((account, container, name))
+ if op == 'read' and self._get_public(path):
+ return True
+ perm_path, perms = self._get_permissions(path)
+
+ # Expand groups.
+ for x in ('read', 'write'):
+ g_perms = set()
+ for y in perms.get(x, []):
+ if ':' in y:
+ g_account, g_name = y.split(':', 1)
+ groups = self._get_groups(g_account)
+ if g_name in groups.keys():
+ g_perms.update(groups[g_name])
else:
- # If the delimiter is found, keep up to (and including) the delimiter.
- if i != -1:
- pseudo_name = pseudo_name[:i + len(delimiter)]
- if pseudo_name not in [y[0] for y in pseudo_objects]:
- if pseudo_name == x[0]:
- pseudo_objects.append(x)
- else:
- pseudo_objects.append((pseudo_name, None))
- objects = pseudo_objects
+ g_perms.add(y)
+ perms[x] = g_perms
- start = 0
- if marker:
- try:
- start = [x[0] for x in objects].index(marker) + 1
- except ValueError:
- pass
- if not limit or limit > 10000:
- limit = 10000
- return objects[start:start + limit]
+ user = smart_unicode(user, strings_only=True)
+ if op == 'read' and ('*' in perms['read'] or user in perms['read']):
+ return True
+ if '*' in perms['write'] or user in perms['write']:
+ return True
+ return False
- def _del_version(self, version):
- sql = 'delete from hashmaps where version_id = ?'
- self.con.execute(sql, (version,))
- sql = 'delete from versions where version_id = ?'
- self.con.execute(sql, (version,))
+ def _can_read(self, user, account, container, name):
+ if not self._is_allowed(user, account, container, name, 'read'):
+ raise NotAllowedError
+
+ def _can_write(self, user, account, container, name):
+ if not self._is_allowed(user, account, container, name, 'write'):
+ raise NotAllowedError
+
+ def _allowed_paths(self, user, prefix=None):
+ sql = '''select distinct name from permissions where (user = ?
+ or user in (select account || ':' || gname from groups where user = ?))'''
+ param = (user, user)
+ if prefix:
+ sql += ' and name like ?'
+ param += (prefix + '/%',)
+ c = self.con.execute(sql, param)
+ return [x[0] for x in c.fetchall()]
+
+ def _allowed_accounts(self, user):
+ allow = set()
+ for path in self._allowed_paths(user):
+ allow.add(path.split('/', 1)[0])
+ return sorted(allow)
+
+ def _allowed_containers(self, user, account):
+ allow = set()
+ for path in self._allowed_paths(user, account):
+ allow.add(path.split('/', 2)[1])
+ return sorted(allow)
+
+ def _shared_paths(self, prefix):
+ sql = 'select distinct name from permissions where name like ?'
+ c = self.con.execute(sql, (prefix + '/%',))
+ return [x[0] for x in c.fetchall()]
projects / pithos / blobdiff