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"""
Demo script for Persistent Search Control
(see https://tools.ietf.org/html/draft-ietf-ldapext-psearch)
See https://www.python-ldap.org/ for project details.
This needs the following software:
Python
pyasn1
pyasn1-modules
python-ldap 2.4+
"""
import sys,ldap,ldapurl,getpass
from ldap.controls.psearch import PersistentSearchControl,EntryChangeNotificationControl,CHANGE_TYPES_STR
try:
ldap_url = ldapurl.LDAPUrl(sys.argv[1])
except IndexError:
print('Usage: psearch.py <LDAP URL>')
sys.exit(1)
# Set debugging level
#ldap.set_option(ldap.OPT_DEBUG_LEVEL,255)
ldapmodule_trace_level = 2
ldapmodule_trace_file = sys.stderr
ldap_conn = ldap.ldapobject.LDAPObject(
ldap_url.initializeUrl(),
trace_level=ldapmodule_trace_level,
trace_file=ldapmodule_trace_file
)
if ldap_url.cred is None:
print('Password for %s:' % (repr(ldap_url.who)))
ldap_url.cred = getpass.getpass()
try:
ldap_conn.simple_bind_s(ldap_url.who,ldap_url.cred)
except ldap.INVALID_CREDENTIALS as e:
print('Simple bind failed:',str(e))
sys.exit(1)
psc = PersistentSearchControl()
msg_id = ldap_conn.search_ext(
ldap_url.dn,
ldap_url.scope,
ldap_url.filterstr,
attrlist = ldap_url.attrs or ['*','+'],
serverctrls=[psc],
)
while True:
try:
res_type,res_data,res_msgid,_,_,_ = ldap_conn.result4(
msg_id,
all=0,
timeout=10.0,
add_ctrls=1,
add_intermediates=1,
resp_ctrl_classes={EntryChangeNotificationControl.controlType:EntryChangeNotificationControl},
)
except ldap.TIMEOUT:
print('Timeout waiting for results...')
else:
for dn,entry,srv_ctrls in res_data:
ecn_ctrls = [
c
for c in srv_ctrls
if c.controlType == EntryChangeNotificationControl.controlType
]
if ecn_ctrls:
changeType,previousDN,changeNumber = ecn_ctrls[0].changeType,ecn_ctrls[0].previousDN,ecn_ctrls[0].changeNumber
change_type_desc = CHANGE_TYPES_STR[changeType]
print('changeType: %s (%d), changeNumber: %s, previousDN: %s' % (change_type_desc,changeType,changeNumber,repr(previousDN)))
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