138 lines
5.1 KiB
Python
138 lines
5.1 KiB
Python
"""
|
|
"""
|
|
|
|
# Created on 2016.07.08
|
|
#
|
|
# Author: Giovanni Cannata
|
|
#
|
|
# Copyright 2016 - 2020 Giovanni Cannata
|
|
#
|
|
# This file is part of ldap3.
|
|
#
|
|
# ldap3 is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU Lesser General Public License as published
|
|
# by the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# ldap3 is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU Lesser General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Lesser General Public License
|
|
# along with ldap3 in the COPYING and COPYING.LESSER files.
|
|
# If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
try:
|
|
from queue import Empty
|
|
except ImportError: # Python 2
|
|
# noinspection PyUnresolvedReferences
|
|
from Queue import Empty
|
|
|
|
from ...core.exceptions import LDAPExtensionError
|
|
from ...protocol.persistentSearch import persistent_search_control
|
|
from ... import SEQUENCE_TYPES
|
|
from ...utils.dn import safe_dn
|
|
|
|
|
|
class PersistentSearch(object):
|
|
def __init__(self,
|
|
connection,
|
|
search_base,
|
|
search_filter,
|
|
search_scope,
|
|
dereference_aliases,
|
|
attributes,
|
|
size_limit,
|
|
time_limit,
|
|
controls,
|
|
changes_only,
|
|
events_type,
|
|
notifications,
|
|
streaming,
|
|
callback
|
|
):
|
|
if connection.strategy.sync:
|
|
raise LDAPExtensionError('Persistent Search needs an asynchronous streaming connection')
|
|
|
|
if connection.check_names and search_base:
|
|
search_base = safe_dn(search_base)
|
|
|
|
self.connection = connection
|
|
self.changes_only = changes_only
|
|
self.notifications = notifications
|
|
self.message_id = None
|
|
self.base = search_base
|
|
self.filter = search_filter
|
|
self.scope = search_scope
|
|
self.dereference_aliases = dereference_aliases
|
|
self.attributes = attributes
|
|
self.size_limit = size_limit
|
|
self.time_limit = time_limit
|
|
self.connection.strategy.streaming = streaming
|
|
if callback and callable(callback):
|
|
self.connection.strategy.callback = callback
|
|
elif callback:
|
|
raise LDAPExtensionError('callback is not callable')
|
|
|
|
if not isinstance(controls, SEQUENCE_TYPES):
|
|
self.controls = []
|
|
else:
|
|
self.controls = controls
|
|
|
|
if events_type and changes_only and notifications:
|
|
self.controls.append(persistent_search_control(events_type, changes_only, notifications))
|
|
self.start()
|
|
|
|
def start(self):
|
|
if self.message_id: # persistent search already started
|
|
return
|
|
|
|
if not self.connection.bound:
|
|
self.connection.bind()
|
|
|
|
with self.connection.strategy.async_lock:
|
|
self.message_id = self.connection.search(search_base=self.base,
|
|
search_filter=self.filter,
|
|
search_scope=self.scope,
|
|
dereference_aliases=self.dereference_aliases,
|
|
attributes=self.attributes,
|
|
size_limit=self.size_limit,
|
|
time_limit=self.time_limit,
|
|
controls=self.controls)
|
|
self.connection.strategy.persistent_search_message_id = self.message_id
|
|
|
|
def stop(self, unbind=True):
|
|
self.connection.abandon(self.message_id)
|
|
if unbind:
|
|
self.connection.unbind()
|
|
if self.message_id in self.connection.strategy._responses:
|
|
del self.connection.strategy._responses[self.message_id]
|
|
if hasattr(self.connection.strategy, '_requests') and self.message_id in self.connection.strategy._requests: # asynchronous strategy has a dict of request that could be returned by get_response()
|
|
del self.connection.strategy._requests[self.message_id]
|
|
self.connection.strategy.persistent_search_message_id = None
|
|
self.message_id = None
|
|
|
|
def next(self, block=False, timeout=None):
|
|
if not self.connection.strategy.streaming and not self.connection.strategy.callback:
|
|
try:
|
|
return self.connection.strategy.events.get(block, timeout)
|
|
except Empty:
|
|
return None
|
|
|
|
raise LDAPExtensionError('Persistent search is not accumulating events in queue')
|
|
|
|
def funnel(self, block=False, timeout=None):
|
|
done = False
|
|
while not done:
|
|
try:
|
|
entry = self.connection.strategy.events.get(block, timeout)
|
|
except Empty:
|
|
yield None
|
|
if entry['type'] == 'searchResEntry':
|
|
yield entry
|
|
else:
|
|
done = True
|
|
|
|
yield entry
|