python-ldap-dev

KeyError while performing 'ldapsearch' operation and processing the result data

[Guruprasad <lgp...@gm...>]

Hi,
I have been trying to write a function to search a LDAP directory by
using the python-ldap APIs.
Here is the code I have written:

<snip>
def getNextUid():
    uidList=[]
    try:
        l=ldap.initialize(ldap_host)
        l.bind_s(ldap_admin_dn,ldap_admin_pass)
        ldap_result=l.search(ldap_base_dn,ldap.SCOPE_SUBTREE,'cn=*',['uidNumber'])
        while 1:
            result_type, result_data=l.result(ldap_result,0)
            if (result_data == []):
                break
            a=result_data[0][1]['uidNumber']
            print a
    except ldap.SERVER_DOWN:
        print "LDAP server down"
</snip>

What I am trying to do in this piece of code is get the list of the
values of 'uidNumber' attribute. The search operation returns a list
containing a tuple. The tuple contains the DN as one value and a
dictionary with uidNumber and its value. I am trying to extract the
value of the uidNumber. I found that result_data was a dictionary
having a key 'uidNumber', but when I try to print its value, I get a
KeyError. Strangely, when I print result_data.keys(), 'uidNumber' is
present.


Thank you.

Regards,
Guruprasad.

Re: KeyError while performing 'ldapsearch' operation and processing the result data

[Fintan M. <fin...@gm...>]

Hi Guruprasad

Had the same issue and someone was kind enough to point me in the right 
direction. Here's what I was told

"A uid has to be changed into a legible format Chapter 3 of RFC 4515 (LDAPv3 
filter strings) starts with:                        

The string representation of an LDAP search filter is a string of UTF-8 
[RFC3629] encoded Unicode characters [Unicode] [..]

So please have a look at RFC 4515 to find out how to escape hex values in a 
search filter.

Function ldap.filter.escape_filter_chars() is helpful for that."

Thanks

      fintan


On Sunday 20 September 2009 15:02:14 Guruprasad wrote:
> Hi,
> I have been trying to write a function to search a LDAP directory by
> using the python-ldap APIs.
> Here is the code I have written:
> 
> <snip>
> def getNextUid():
>     uidList=[]
>     try:
>         l=ldap.initialize(ldap_host)
>         l.bind_s(ldap_admin_dn,ldap_admin_pass)
>        
>  ldap_result=l.search(ldap_base_dn,ldap.SCOPE_SUBTREE,'cn=*',['uidNumber'])
>  while 1:
>             result_type, result_data=l.result(ldap_result,0)
>             if (result_data == []):
>                 break
>             a=result_data[0][1]['uidNumber']
>             print a
>     except ldap.SERVER_DOWN:
>         print "LDAP server down"
> </snip>
> 
> What I am trying to do in this piece of code is get the list of the
> values of 'uidNumber' attribute. The search operation returns a list
> containing a tuple. The tuple contains the DN as one value and a
> dictionary with uidNumber and its value. I am trying to extract the
> value of the uidNumber. I found that result_data was a dictionary
> having a key 'uidNumber', but when I try to print its value, I get a
> KeyError. Strangely, when I print result_data.keys(), 'uidNumber' is
> present.
> 
> 
> Thank you.
> 
> Regards,
> Guruprasad.
> 
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