1""" 2Demo script for Persistent Search Control 3(see https://tools.ietf.org/html/draft-ietf-ldapext-psearch) 4 5See https://www.python-ldap.org/ for project details. 6This needs the following software: 7Python 8pyasn1 9pyasn1-modules 10python-ldap 2.4+ 11""" 12 13import sys,ldap,ldapurl,getpass 14 15from ldap.controls.psearch import PersistentSearchControl,EntryChangeNotificationControl,CHANGE_TYPES_STR 16 17try: 18 ldap_url = ldapurl.LDAPUrl(sys.argv[1]) 19except IndexError: 20 print('Usage: psearch.py <LDAP URL>') 21 sys.exit(1) 22 23# Set debugging level 24#ldap.set_option(ldap.OPT_DEBUG_LEVEL,255) 25ldapmodule_trace_level = 2 26ldapmodule_trace_file = sys.stderr 27 28ldap_conn = ldap.ldapobject.LDAPObject( 29 ldap_url.initializeUrl(), 30 trace_level=ldapmodule_trace_level, 31 trace_file=ldapmodule_trace_file 32) 33 34if ldap_url.cred is None: 35 print('Password for %s:' % (repr(ldap_url.who))) 36 ldap_url.cred = getpass.getpass() 37 38try: 39 ldap_conn.simple_bind_s(ldap_url.who,ldap_url.cred) 40 41except ldap.INVALID_CREDENTIALS as e: 42 print('Simple bind failed:',str(e)) 43 sys.exit(1) 44 45psc = PersistentSearchControl() 46 47msg_id = ldap_conn.search_ext( 48 ldap_url.dn, 49 ldap_url.scope, 50 ldap_url.filterstr, 51 attrlist = ldap_url.attrs or ['*','+'], 52 serverctrls=[psc], 53) 54 55while True: 56 try: 57 res_type,res_data,res_msgid,_,_,_ = ldap_conn.result4( 58 msg_id, 59 all=0, 60 timeout=10.0, 61 add_ctrls=1, 62 add_intermediates=1, 63 resp_ctrl_classes={EntryChangeNotificationControl.controlType:EntryChangeNotificationControl}, 64 ) 65 except ldap.TIMEOUT: 66 print('Timeout waiting for results...') 67 else: 68 for dn,entry,srv_ctrls in res_data: 69 ecn_ctrls = [ 70 c 71 for c in srv_ctrls 72 if c.controlType == EntryChangeNotificationControl.controlType 73 ] 74 75 if ecn_ctrls: 76 changeType,previousDN,changeNumber = ecn_ctrls[0].changeType,ecn_ctrls[0].previousDN,ecn_ctrls[0].changeNumber 77 change_type_desc = CHANGE_TYPES_STR[changeType] 78 print('changeType: %s (%d), changeNumber: %s, previousDN: %s' % (change_type_desc,changeType,changeNumber,repr(previousDN))) 79