Blocking bind....

[Jerry Lee]

Hi Michael,

Thanks for the response.

>From: Michael Ströder <michael at stroeder.com>
>To: Jerry Lee <tesno2 at hotmail.com>
>CC: python-ldap-dev at lists.sourceforge.net
>Subject: Re: Blocking bind....
>Date: Tue, 04 Mar 2003 17:31:23 +0100
>
>Jerry Lee wrote:
>>
>>I recently posted to the list about a problem I am having with bind 
>>blocking for a long time before it times out if the server isn't there.
>
>You can elaborate on "the server isn't there"?
>

The machine doesn't exist - an ip address that I can't ping.

I'm writing a QT-based LDAP browser and I want to make it user friendly.  
Give the user an option of cancelling a request if they typed the wrong IP 
address (for example)

>
>>Mario Cicognini (thx Mario!!) was kind enough to suggest the following:
>>
>>         l = ldap.open(LDAPServer)
>>         id = l.simple_bind(LDAPbindUsername, LDAPbindPassword)
>>         status,res = l.result(id, 1, 60)
>>         if status != 'RES_BIND':
>>             return -1
>>
>>which I tried with no success.
>
>First note that the connection timeout part is done within OpenLDAP libs. 
>It might be worth testing with newer OpenLDAP lib version 2.1.x. There's 
>nothing more you can do at Python level.
>

How do I set the TIMEOUT values with set_option.
Could you give me an example of how to set OPT_TIMEOUT and 
OPT_NETWORK_TIMEOUT to 10 secs??

I had thought from reading the python-ldap docs that simple_bind was an 
asynchronous operation - that control would be returned to my program 
immediately after issuing the request.  However, on my machine, it blocks - 
and then times out after around 90secs.  Kind of annoying.

Is the synchronous/asynchronous nature of the call controlled in the 
python-ldap module or is it a function of the OpenLDAP libs??


>>My app blocks at the
>>id = l.simple_bind(LDAPbindUsername, LDAPbindPassword)
>>line and doesn't return until around 90secs later.
>
>Note that opening the connection is deferred until attempting first the 
>LDAP operation. The ldap_initialize() function of OpenLDAP libs just 
>returns a LDAP connection struct without actually connecting to the server. 
>I guess your simple bind is the first LDAP operation.
>
>Ciao, Michael.

Yes, this seems to be OK.  I get program control back immediately after the 
ldap_open (ldap_initialie worked the same way).


Thanks for the response and many thanks for the work you've done on 
python-ldap.  You've helped make developing the app a much simpler task and 
even kind of fun!!

Yours,

Jerry.