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Plone UI and default rules for plone.caching/z3c.caching

Project description

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This package provides a Plone UI and default rules for managing HTTP response caching in Plone. It builds on z3c.caching, plone.caching and plone.cachepurging.


Version Plone
3.x 6.0 or above
2.x 5.2
1.x 5.1, 5.0, 4.3, 4.2, 4.1

Installation is shipped as a dependency of the Plone package, and it should be available on all Plone installations, but Caching is not enabled by default, although it is highly recommended to configure caching for every new Plone site.

After creating a new Plone site, go to Site Setup, then Addons and install HTTP caching support.

Under the Advanced header, look for the Caching control panel -- currently only supported on the Classic UI.


When the Caching control panel is not there, there can be various reasons for this:

  • If your installation does not load the Plone package, but only Products.CMFPlone, then is not included.
  • If the package is included, but you add a Plone Site using the advanced form and disable caching, then the control panel is not there.

If you want to install it in an existing Plone Site:

  1. Make sure the package is available in the Plone instance, by adding or Plone to your installation.
  2. From the Plone Site Setup go to the ZMI (Zope Management Interface).
  3. Go to portal_setup, and then to the Import tab.
  4. Select the HTTP caching support profile, perhaps easiest by id:
  5. Click 'Import all steps'.

Source Code

Contributors, please read the document Process for Plone core's development

Sources are at the Plone code repository hosted at Github .

This project is supported by

Plone Logo


The project is licensed under GPLv2.


3.1.4 (2024-02-12)

Bug fixes:

  • Fix purging of image scale paths for Dexterity content. [erral] #136


  • Update configuration files. [plone devs] cfffba8c

3.1.3 (2023-10-25)

Bug fixes:

  • Fix locked component of ETag to discriminate between different locks. @JeffersonBledsoe, @davisagli #122

3.1.2 (2023-06-16)


  • Update configuration files. [plone devs] e08b1234, fb4615d7


  • Fixed tests that compared a stable time with a ten year old Expires handler. [maurits] #127

3.1.1 (2023-05-15)


  • Changed hardcoded test date to June instead of May to temporarily fix a testing error. See issue 127 <>_. Needs a proper fix within a month. [maurits] #127

3.1.0 (2023-04-26)

New features:

  • Update the resourceRegistries ETag to use the config registry modification time. This time is set since Plone 6.0.4. Fixes issue 93 <>_. [maurits] #93

3.0.5 (2023-04-14)

Bug fixes:

  • Fix spelling error. [gforcada] #124

3.0.4 (2023-03-14)

Bug fixes:

  • Do not mention Squid but mentions CDNs in the descriptions. [jensens] #119


  • Update configuration files. [plone devs] 13d8d6c0, cbbcff93

3.0.3 (2023-02-22)

Bug fixes:

  • Declare dependencies. [gforcada] #1


  • Convert README and CHANGES to markdown. [ericof] #114

3.0.2 (2023-01-26)

Bug fixes:

  • Correct Bootstrap classes for <select /> in controlpanel. [petschki] (#112)
  • Revert changes to tests to work with the Zope security fix. We must have an empty byte, not text, otherwise it is an indication that we get a possibly wrong Content-Type in a 304 status. See Zope issue 1089 <>_. [maurits] (#1089)

3.0.1 (2022-12-21)

Bug fixes:

  • Fix tests to work with the Zope security fix. [maurits] (#106)

3.0.0 (2022-11-14)

Bug fixes:

  • Add missing quotation mark in Etag 304 Response [sverbois] (#104)

3.0.0b2 (2022-07-20)

Bug fixes:

  • Remove trailing comma to avoid different default messages for the same msgid [erral] (#102)

3.0.0b1 (2022-06-23)

Bug fixes:

  • Add missing i18n tags [erral] (#101)

3.0.0a14 (2022-05-15)

Breaking changes:

  • Remove unmaintained Split-View profile. [jensens] (#99)

New features:

  • Move caching ruleset assignments from here to plone.restapi and add ZCML feature here. [jensens] (#100)

Bug fixes:

  • Minor overhaul, use plone.base, remove some Plone 5.2 imports, ... [jensens] (#98)
  • Minor code cleanup and review/overhaul docs. [jensens] (#99)

3.0.0a13 (2022-04-05)

Bug fixes:

  • Apply black to the codebase, format it to be Python 3 only (#94)

3.0.0a12 (2022-04-04)

Bug fixes:

  • Test-only fix: caching checks for timestamp.txt in portal_resources which is no longer there. Update ETAG Headers accordingly. [pbauer] (#92)

3.0.0a11 (2022-02-24)

Bug fixes:

  • Updated control panel icon. Use iconresolver to get the proper svg icon. [yurj] (#91)

3.0.0a10 (2021-12-01)

New features:

  • When purging images also purge the field WITHOUT a size parameter (e.g. [...]/@@images/image). [wolbernd] (#89)

3.0.0a9 (2021-11-23)

Bug fixes:

  • Remove translations endpoint test because it does not have the correct fixture [sneridagh] (#87)

3.0.0a8 (2021-10-22)

Bug fixes:

  • fix deprecated imports [petschki] (#86)

3.0.0a7 (2021-10-13)

Bug fixes:

  • Fix label in [brian.duncan] (#84)

3.0.0a6 (2021-09-15)

Bug fixes:

  • Add upgrade step to define the new base terse cache setting. [maurits] (#82)

3.0.0a5 (2021-09-01)

New features:

  • Add etag for layout property. This is not yet added to a caching profile, but this can be done later. Fixes issue 80 <>_. [maurits] (#80)

3.0.0a4 (2021-05-14)

Bug fixes:

  • Fix ram-caching of binary files. [agitator] (#79)

3.0.0a3 (2021-02-25)

Breaking changes:

  • Update for Plone 6 with Bootstrap markup [ale-rt, jensens] (#63)

Bug fixes:

  • Links with pat-modal: Remove unused redirectOnResponse from data-pat-modal actionOptions. (Products.CMFPlone#3197) [fulv] (#3197)

3.0.0a2 (2021-02-02)

New features:

  • Restored resourceRegistries ETag, but now for Plone 5 resource registries. Fixes warning "Could not find value adapter for ETag component resourceRegistries". [maurits] (#61)

Bug fixes:

  • Add more purge paths for images and downloads [jensens] (#71)

3.0.0a1 (2020-12-03)

Breaking changes:

  • Remove traces of Archetypes [pbauer] (#68)
  • Drop Python 2 support. Black code style and isort. [jensens] (#69)

New features:

  • Introduce terseCaching operation and plone.content.dynamic ruleset. terseCaching is a rule with by default 10s in browser cache and 60s in edge cache. It is intended to be used for highly dynamic content defined in the plone.content.dynamic ruleset. The combination reduces load on the backend if there a lots of requests. [jensens] (66-1)
  • Support for plone.restapi. Define cache:ruleset assignments for anonymous accessible endpoints. Attention: Relies on Vary header unless plone.restapi gives up content negotiation. Latter may conflict with edge side cache not supporting the Vary header. [jensens] (66-2)

2.0.8 (2020-10-30)

Bug fixes:

  • Do not assume request or request.URL is a string. It might be None. [jensens, iham] (#59)
  • Remove hopelessly outdated proxy config examples. Look at plone.recipe.varnish for excellent examples! [jensens] (#64)

2.0.7 (2020-09-28)

Bug fixes:

  • Fixed invalid escape sequences. [maurits] (#3130)

2.0.6 (2020-06-24)

New features:

  • Remove Range from request if the If-Range condition is not fulfilled [mamico] (#58)

2.0.5 (2020-04-20)

Bug fixes:

  • Minor packaging updates. (#1)

2.0.4 (2020-02-20)

Bug fixes:

  • Purging image scales of behavior fields, e.g. lead image [ksuess] (#55)

2.0.3 (2019-09-13)

Bug fixes:

  • Fix python3 related encoding error on manual purge page. [agitator] (#51)

2.0.2 (2019-04-10)

Bug fixes:

  • fix typo [vincentfretin] (#47)
  • Fix controlpanel for Python 3 [petschki] (#48)

2.0.1 (2019-03-03)

Bug fixes:

  • Only fire 1 Purge() when deleting content, instead of 3 [skurfer] Detect and ignore content creation more reliably [skurfer] Also purge the parent object when something changes (since the parent probably displays a list that includes the item being changed) [skurfer] (#37)

2.0.0 (2019-02-08)

Breaking changes:

  • Removed legacy resource registries [ksuess] (#45)

1.2.23 (2018-12-28)

Bug fixes:

  • Warn after save if caching was disabled while purging is still enabled. [jensens]


  • Legacy code clean-up Handling of legacy resource registries Products.ResourceRegistries removed [ksuess]

1.2.22 (2018-09-23)

New features:

  • Python 3 support [pbauer, MatthewWilkes, ale-rt]

1.2.21 (2018-04-03)

New features:

  • Use plone as i18n domain in ZCML files too [erral]

  • Use plone as i18n domain [erral]

Bug fixes:

  • Fix backslash escapes in i18nstring (poedit complains). [jensens]

1.2.20 (2018-02-05)

New features:

  • Prepare for Python 2 / 3 compatibility [b4oshany, davilima6]

1.2.19 (2017-11-24)

New features:

  • Purging all image scale paths and file paths in custom dexterity content types. [karalics]

1.2.18 (2017-04-08)

Bug fixes:

  • Fixed blank edit forms of the per ruleset parameters. Issue 1993 <>_. [maurits]

1.2.17 (2017-04-02)

Bug fixes:

  • Fixed title and description of max age in strong caching rule for resources. They wrongly were the same as for shared max age. Fixes issue 1989 <>_. [maurits]

1.2.16 (2017-03-23)

Bug fixes:

  • Fix: Do not break Plone if there is no Archetypes available. [jensens]

1.2.15 (2017-01-12)

Bug fixes:

  • Remove dependency on unittest2; fix tests assertions. [hvelarde]

  • Fixed tests when using ZODB 4. [davisagli]

1.2.14 (2016-11-18)

Bug fixes:

  • Update code to follow Plone styleguide. [gforcada]

1.2.13 (2016-10-05)

Bug fixes:

  • Code-Style: isort, utf8-headers, zca-decorators, manual cleanup. [jensens]

1.2.12 (2016-09-16)

Bug fixes:

  • Enable unload protection by using pattern class pat-formunloadalert instead enableUnloadProtection. [thet]

1.2.11 (2016-08-17)


  • Use plone.namedfile for test image. [didrix]

  • Use zope.interface decorator. [gforcada]

1.2.10 (2016-03-29)


  • Show status after synchronous purge if it is an error status. [maurits]

1.2.9 (2016-02-19)


  • Fixed deprecated imports in tests. [thet]

1.2.8 (2015-11-28)


1.2.7 (2015-09-09)

  • fix cache settings modal settings so they do not show content inline on save. [vangheem]

1.2.6 (2015-07-18)

  • Remove gzip option, silly to be done at this layer. [vangheem]

  • Change the category of the configlet to 'plone-advanced' [sneridagh]

1.2.5 (2015-06-09)

  • correctly create purge paths for root of site, prevent double slashes and the empty root of site(no trailing slash) not getting a purge path generated [vangheem]

1.2.4 (2015-06-05)

  • update first time here warning [vangheem]

  • make control panel work for both plone 4 and plone 5 with tabs [vangheem]

1.2.3 (2015-05-04)

  • Fixed getObjectDefaultView method to strip off leading / and/or @@. [alecghica]

  • Fix the portalPath used in the controlpanel for manual purging URL's. This bug resulted in rarely doing all the purging required. [puittenbroek]

1.2.2 (2014-10-23)

1.2.1 (2014-04-01)

  • Fix tests that fail on the day before the switch to daylight saving time. [pbauer]

1.2.0 (2014-02-26)

  • Use the PLONE_APP_CONTENTTYPES_FIXTURE test layer for Plone 5 compatibility. [timo]

1.1.7 (unreleased)

  • Make it possible to set a maxage of zero in strong caching. This is an edge case since this would ordinarily be handled by moderate caching. [smcmahon]

  • Add some testing for weak caching operations. [smcmahon]

  • Fix handling of anon-only flag for cases where maxage is not zero. It was effectively ignored. Added operation test for strong caching. [smcmahon]

1.1.6 (2013-08-14)

  • Fix double purge of paths for items whose default view is the same as /view [eleddy]

1.1.5 (2013-08-13)

  • Register the plone.atobjectfields adapter not only when Products.Archetypes but also is installed. [thet]

1.1.4 (2013-06-13)

  • Fixed purge paths for virtual hosting scenarios using virtual path components. [dokai]

1.1.3 (2013-03-05)

  • Provide message for newbies to suggest importing pre-defined caching rule set. [vangheem]

1.1.2 (2012-12-27)

  • Add other feed types to plone.content.feed purge policy [vangheem]

  • Fix bug where resource registries etag is calculated incorrectly if a registry is missing. [davisagli]

  • Fix bug 12038 <>_. If transformIterable iterates on the 'result' iterable, it must return a new one. [ebrehault]

1.1.1 (2012-08-30)

  • Nothing changed yet.

1.1 (2012-05-25)

  • Use zope.browserresource instead of [hannosch]

  • Deprecated methods aliases were replaced on tests. [hvelarde]

1.0.4 (unreleased)

  • Fix possible test failures by logging in with the user name. Note that user id and user name (login name) can differ. [maurits]

1.0.3 (2012-04-15)

  • Fix packaging issue. [esteele]

1.0.2 (2012-04-15)

  • Handle caching of resource registries in RAM cache by not storing empty bodies in the RAMCache [eleddy with major tseaver support]

1.0.1 (2012-01-26)

  • Properly handle a changed configuration from with etags to no etags by forcing a page refresh [eleddy]

  • When not caching with etags, don't sent an etag header to stop caching [eleddy]

  • When there was an error like Unauthorized, 200 status and empty body would be cached in RAMCache instead of not caching anything. This is due to a bug with Zope 2.13 publication events : response.status is not set when IPubBeforeAbort is notified. Fixed by using error_status stored on request by plone.transformchain. [gotcha]

  • Added 12 translation strings for ruleset's title and description. Corresponding translation strings have been added in in PloneTranslations [giacomos]

  • Added 6 translation strings for caching profiles' title and description. Corresponding translation strings have been added in in PloneTranslations [giacomos]

  • Changed wrong i18n domain in the messagefactory. plone.caching -> [giacomos]

1.0 (2011-05-12)

  • Use the userLanguage ETag component in place of the language ETag component in the default configs to allow ETags to be used for anonymous users with caching. [elro]

  • Add the SERVER_URL to the RAM cache key. [elro]

  • Declare plone.namedfile.scaling.ImageScale to be a plone.stableResource. [elro]

  • Add [WouterVH]

  • Fixed tests failing on Zope 2.13 due to the HTTP status no longer being included in the response headers. [davisagli]

  • Add an ILastModified adapter for FSPageTemplate as the FSObject adapter would otherwise take precedence. [stefan]

1.0b2 (2011-02-10)

  • Added News Item to the list of purgedContentTypes, so the image field and its scales gets purged. [stefan, hannosch]

  • Associated file_view, image_view and image_view_fullscreen by default with the plone.content.itemView ruleset, since none of them is the default view of their respective content type, they didn't get the automated handling. [stefan, hannosch]

  • Added purging for's BlobFields. [stefan, hannosch]

  • Fix documentation to refer to the correct resourceRegistries instead of the singular version. [stefan, hannosch]

  • Use plone.registry FieldRefs to manage parameter overrides. This requires 1.0b3 and 1.0b3 or later. [optilude]

  • Update distribution metadata to current best practice. [hannosch]

  • Added an etag component to track the existence of a copy/cut cookie [newbery]

  • Fixed various i18n issues. [vincentfretin]

1.0b1 (2010-08-04)

  • Add an option for "anonymous only" caching to the default operations. This is a simple way to switch off caching for logged-in users. See the README for more details. [optilude]

  • Add basic plone.namedfile caching rules, if plone.namedfile is installed [optilude]

  • Implement lookup based on portal type class/interface as well as name, and set up defaults for items and folders. [optilude]

  • template fixes for compatibility [pilz]

1.0a1 (2010-04-24)

  • Initial release. [optilude, newbery, smcmahon]

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