Sample Code: Paging Searches in eDirectory, via LDAP

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over 14 years ago

Problem



A Forum reader recently asked:



"I am wondering whether any version of eDirectory supports a paging search that returns partial results each time. I know that the PagedResultsControl LDAP V3 control can provide me such functionality. We tried it in our current eDirectory version, but we got an "Operation not supported" error. "



And here's the response from Michael Stroder ...



Solution



For python-ldap, see the example below for simple paged results (Demo/page_control.py).



url = "ldap://localhost:1390/"
base = "dc=stroeder,dc=de"
search_flt = r'(objectClass=*)'
page_size = 10

import ldap
from ldap.controls import SimplePagedResultsControl

ldap.set_option(ldap.OPT_REFERRALS, 0)
l = ldap.initialize(url)
l.protocol_version = 3
l.simple_bind_s("", "")

lc = SimplePagedResultsControl(
ldap.LDAP_CONTROL_PAGE_OID,True,(page_size,'')
)

# Send search request
msgid = l.search_ext(
base,
ldap.SCOPE_SUBTREE,
search_flt,
serverctrls=[lc]
)

pages = 0
while True:
pages = 1
print "Getting page %d" % (pages,)
rtype, rdata, rmsgid, serverctrls = l.result3(msgid)
print '%d results' % len(rdata)
pctrls = [
c
for c in serverctrls
if c.controlType == ldap.LDAP_CONTROL_PAGE_OID
]
if pctrls:
est, cookie = pctrls[0].controlValue
if cookie:
lc.controlValue = (page_size, cookie)
msgid = l.search_ext(base, ldap.SCOPE_SUBTREE, search_flt,
serverctrls=[lc])
else:
break
else:
print "Warning: Server ignores RFC 2696 control."
break

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