Simple Zope 2 redirection manager object
The JRedirector package provides an object that is capable of redirecting web requests in a controlled fashion and keeping logs about it.
I wrote it so that when I move pieces of my sites around I have a way of specifying where users will go if they navigate to the old obsolete location. This is helpful if your site is linked from other sites and you have no control over the accuracy of these outside links.
The administrator can add mappings from old path to new path where the user will be redirected to when he tries to visit the old path. The HTTP header sent along with this redirect can be specified, available choices are “301” (moved permanently) or “302” (moved temporarily).
The object will keep an internal log of all web requests that are referred to it and presents it on a logging output page.
The administrator creates a JRedirector object in a given location in site. Invoking the redirection capabilities must happen explicitly, for example from standard_error_message, by calling the JRedirector object and passing REQUEST.
As an example, here is the snippet of my standard_html_error that invokes the JRedirector object:
<dtml-if expr="error_type == 'NotFound'"> <dtml-call expr="redirector_object(REQUEST)"> </dtml-if>
This will fire whenever a “NotFound” error occurs. If the path the user attempted to go to is not in the explicitly mapped list of paths defined by the administrator in the JRedirector object “Mappings” tab then nothing will happen and the standard_error_message will continue to render normally. If the looked-for path is explicitly mapped then the user will be redirected and will never see standard_error_message.
This package requires Zope 2.8 and up.
If you have suggestions, bug reports or requests please use the issue tracker at http://www.dataflake.org/tracker/
You can retrieve the latest code from Subversion using setuptools or zc.buildout via this URL:
License change to use ZPL 2.1
overall code modernization
Feature: Allow selection of varying log levels including no logging at all. This should put all those at ease who saw alarming ZODB growth on very busy sites that see a lot of redirections.
Feature: Added interoperability with virtual hosting. The latest versions of Zope seemed to have changed the values that get inserted into the PATH_INFO REQUEST-variable if a VirtualHostMonster is used. (Tracker item 208)
Feature: Provide data for the Undo tab entries produced by the JRedirector
Feature: Change the internal storage of logging data to be more efficient. This change is automatically applied to existing JRedirector instances the first time the log is accessed, either during a redirect or when the administrator looks up the log history in the Zope management interface. This should also fix Tracker issue 197 if it was a real issue (my own testing did not support these conclusions).
This is the “Josef Meile Appreciation Release”. Virtually all suggestions for improvements in this release came from Josef.
Feature: Referrers to faulty URLs are now tracked as well. They are listed on the Log tab.
Feature: Mappings and Log views have been reorganized a little to be more obvious about what they show and to avoid having to scroll the browser window sideways if a URL is overly long.
Feature: All displayed URLs are now clickable and will open in a new window. This allows for quickly testing the old and new paths on the Mappings tab as well as the referrers listed on the Log tab.
Feature: Old paths that are specified with a trailing “/” (slash) characters will have it stripped to prevent matches on directory paths failing because most people just don’t use trailing slashes when referring to directories.
Feature: Case-insensitive matching of requested paths to redirects (first suggested by Josef Meile).
Feature: Ability to clear the current logs from the ZMI (suggested by Josef Meile).
Feature: Multiple paths can now be redirected to a single new path by specifying a “Wildcard Mapping”. Wildcard mappings are used for those requested URLs that have not matched any other non-wildcard rule and that are underneath the path specified as Old Path when setting up the mapping.
Feature: Added more allowed HTTP response codes and an explanation of these codes in README.txt
Bug: Highlight the correct ZMI tab after submitting anything from the “Mappings” and “Log” tab.
Bug: Use REQUEST.PATH_INFO instead of REQUEST.URL because PATH_INFO always contains the full path during traversal, whereas URL only contains the path up to the currently traversed element. This fixes a bug that prevented redirecting to a path that had nothing in common with the requested path. Thanks to Josef Meile for pointing this out.
Feature: __call__ is now equivalent to calling the redirect method, making usage even easier. Now you can just activate it like this: redirector_object(REQUEST)
First working code version
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