[Grok-dev] megrok.login: substituting authenticator

[Uli Fouquet]

Hi Aroldo,

Aroldo Souza-Leite wrote:

> I'm trying to substitute the 
> 'authplugins.PrincipalRegistryAuthenticator' in 'megrok.loging' by 
> another authenticator that uses an external database of users. I 
> understand I have to model a class that implements 
> 'IAuthenticatorPlugin'. But where do I tell 'megrok.login' to use the my 
> custom authenticator?

You have to write your own PAU setup and register it using
`megrok.login.setup()`. For this you need an own setup function, roughly
like this::

 from zope.pluggableauth.plugins.session import SessionCredentialsPlugin

 def customPAUSetup(site, pau, viewname=None, strict=None,
                    autoregister=None):
     """Setup our own PAU.
     """
     # Assuming your authenticator is registered as a named global 
     # utility 'My custom authenticator plugin'
     pau.authenticatorPlugins = ('My custom authenticator plugin', )
     pau['custom_session'] = session = SessionCredentialsPlugin()
     pau.credentialsPlugins = ('No Challenge if Authenticated',
                               'custom_session',)
     return

and then register this setup like this::

  import grok
  import megrok.login

  class CustomSetupApp(grok.Application, grok.Container):
      megrok.login.enable()
      megrok.login.setup(customPAUSetup)

If you create a new application, the new PAU will be active.
A more elaborate example of the setup is part of the docs in

http://svn.zope.org/megrok.login/trunk/src/megrok/login/tests/custompausetup.py?view=markup

Naturally, if you do so much things yourself, you might be better off
dropping megrok.login and using the pluggableauth stuff directly.

Best regards,

-- 
Uli

-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: Dies ist ein digital signierter Nachrichtenteil
Url : http://mail.zope.org/pipermail/grok-dev/attachments/20100906/41606ec2/attachment.bin