no module named py

David Hláčik david at hlacik.eu
Thu Jun 5 00:26:25 CEST 2008


Hello, what this beautifull mesage which is messing me whole day means :

*python: error <type 'instance'>, ('No module named py',), No module named
py*

as a result of class pdg.py which is called from nnrpd_auth.py.

To be detailed ... news server inn is calling that when doing
autentification , it calls nnrpd_auth.py where instance of my class is
hooked into inn , when authentification begins it calls method
authenticate(arguments) from pdg.

I will provide as many information as needed to solve this mistery, becouse
i really need to solve it.
Thanks!


#!/usr/bin/env python

import ldap
from nnrpd import syslog
class news:

        server = 'ldap://dev01.net.hlacik.eu'
        user_dn = 'cn=pdg,ou=Operators,o=Polarion'
        user_pw = 'Pdg1'

        connectcodes = {   'READPOST':200,
                           'READ':201,
                           'AUTHNEEDED':480,
                           'PERMDENIED':502
        }

        authcodes = {  'ALLOWED':281,
                       'DENIED':502
        }

        def newsauth(self,match_username,match_password):
                base_dn = 'ou=Users,o=Polarion'
                filter = "(uid=" +  match_username +  ")"
                attrs = ['userPassword']

                try :
                        l = ldap.initialize(self.server)
                        l.bind_s(self.user_dn, self.user_pw)
                        raw_res = l.search_s( base_dn, ldap.SCOPE_SUBTREE,
filter, attrs )
                        l.unbind()
                except ldap.SERVER_DOWN:
                        print "Error, server down"
                        return 2
                except ldap.INVALID_CREDENTIALS:
                        print "Error, invalid credentials"
                        return 2
                except ldap.LDAPError, e:
                        print "Error, %s" % e
                for results in raw_res:
                        (cn,search) = results
                        for password in search["userPassword"]:
                                if password == match_password: return 1

                return 0


        def authenticate(self, attributes):

                # just for debugging purposes
                syslog('notice', 'nnrpd_auth authenticate() invoked:
hostname %s, ipaddress
 %s, interface %s, user %s' % (\
                        attributes['hostname'], \
                        attributes['ipaddress'], \
                        attributes['interface'], \
                        attributes['user']))

                try:
                        syslog('notice', "result %s" %
self.newsauth('boss','bbbb'))
                except Exception, msg:
                        syslog('notice', "error %s, %s, %s" %
(type(msg),msg.args,msg))
                # do username passworld authentication
                #if self.newsauth(attributes['user'],
str(attributes['pass'])):
                #    syslog('notice', 'authentication by username
succeeded')
                #    return ( self.authcodes['ALLOWED'], 'No error' )
                #else:
                #    syslog('notice', 'authentication by username failed')
                #    return ( self.authcodes['DENIED'], 'Access Denied!')

-------------------

nnrpd_auth_py :

#
# Sample authentication and authorization class. It defines all methods
known
# to nnrpd.
#
# Import functions exposed by nnrpd. This import must succeed, or nothing
# will work!
from nnrpd import *
from pdg import *

myauth = news()

# ...and try to hook up on nnrpd. This would make auth object methods
visible
# to nnrpd.
try:
    set_auth_hook(myauth)
    syslog('notice', "authentication module successfully hooked into nnrpd")
except Exception, errmsg:
    syslog('error', "Cannot obtain nnrpd hook for authentication method: %s"
% errmsg[0])
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