Machinery to include web resources based on request layer.
The package is able to include the following types of resources:
- Cascading stylesheets (.css)
- Kinetic stylesheets (.kss)
The package operates with browser resources, registered individually or using the resource directory factory.
A simple example:
<configure xmlns="http://namespaces.zope.org/zope" xmlns:browser="http://namespaces.zope.org/browser"> <include package="z3c.resourceinclude" file="meta.zcml" /> <include package="z3c.resourceinclude" /> <browser:resource name="example.css" file="example.css" /> <browser:resourceInclude layer="zope.publisher.interfaces.browser.IDefaultBrowserLayer" include="example.css" /> </configure>
This registration means that whenever the request provides IDefaultBrowserLayer the resource named ‘example.css’ will be included on the page.
To render HTML snippets that include applicable resources, a content provider is provided, see z3c/resourceinclude/provide.py. You may also use one of the viewlets:
<browser:viewlet name="resourceinclude" class="z3c.resourceinclude.viewlets.CacheOneHourViewlet" permission="zope.View" />
A convenience method is provided to require a given resource layer:
>>> from z3c.resourceinclude import include >>> include(IMyLayer)
Resources are included in the order they’re registered; that is, the order in which the ZCML-directives are processed.
When not in ‘devmode’, the resource collector will automatically merge resources, giving them a filename based on the contents (sha digest). This has the side effect that merged resources are set to never expire.
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