plone.postpublicationhook 1.0rc1

Zope 2 post-publication hook

Introduction

This package provides a hook into Zope’s ZPublisher that is run after the publisher has completed publication, but before the the transaction is commited and the response is returned to the requesting browser. This is practical for caching purposes: it is the ideal place to determine and insert caching headers into the response.

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

Example

As an example we will write a bit of code which logs the path of every published object. This is the code for the event handler:

from zope.interface import Interface
from zope.component import adapter
from plone.postpublicationhook.interfaces import IAfterPublicationEvent
import logging

logger = logging.getLogger("LogRequest")

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

    logger.info("Request for object %s" % path)

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

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

Changelog

1.0rc1 - October 15, 2008

• Initial release [wichert]