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