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pypm install plone.validatehook

How to install plone.validatehook

  1. Download and install ActivePython
  2. Open Command Prompt
  3. Type pypm install plone.validatehook
 Python 2.7Python 3.2Python 3.3
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Lastest release
version 1.0 on Jan 5th, 2011


This package provides a hook into Zope's ZPublisher that is run after the publisher has completed traversal and authentication, but before it tries to publish an object. This is practical for tasks such as tracking user activity.

Hooks use zope.event's event mechanism using the plone.validatehook.interfaces.IPostValidationEvent. This is based on the standard ObjectEvent form zope.component.

The IPostValidationEvent event has two attributes: user which is the currently authenticated user object and request, which is the current request object.

Keep in mind that even unauthenticated requests have a user object. If you only want to deal with 'normal' users make sure you ignore any instances of AccessControl.User.SpecialUser.


As an example we will write a bit of code which logs the id of the current user and the path to the current code. This is the code for the event handler:

System Message: WARNING/2 (<string>, line 29)

Literal block expected; none found.

from zope.interface import Interface from zope.component import adapter from plone.validatehook.interfaces import IPostValidationEvent import logging

logger = logging.getLogger("LogRequest")

@adapter(Interface, IPostValidationEvent) def LogRequest(object, event): if getattr(object, "getPhysicalPath", None) is None: path="Unknown path" else: path="/".join(object.getPhysicalPath()

logger.info("Request from user '%s' for object %s" % event.user.getId(), path)

To use this code you need to register it in zcml:

<subscriber handler=".events.LogRequest" />


1.0 - October 15, 2008
  • Move to svn.zope.org and relicense under ZPL.

System Message: WARNING/2 (<string>, line 62)

Bullet list ends without a blank line; unexpected unindent.


1.0rc1 - July 15, 2008
  • Initial release

System Message: WARNING/2 (<string>, line 69)

Bullet list ends without a blank line; unexpected unindent.


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Last updated Jan 5th, 2011

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