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Your IP : 216.73.216.180
"""
"""
# 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 ...utils.dn import safe_dn
from ...protocol.microsoft import persistent_search_control
class ADPersistentSearch(object):
def __init__(self,
connection,
search_base,
search_scope,
attributes,
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.message_id = None
self.base = search_base
self.scope = search_scope
self.attributes = attributes
self.controls = [persistent_search_control()]
# this is the only filter permitted by AD persistent search
self.filter = '(objectClass=*)'
self.connection.strategy.streaming = streaming
if callback and callable(callback):
self.connection.strategy.callback = callback
elif callback:
raise LDAPExtensionError('callback is not callable')
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,
attributes=self.attributes,
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