Class ModifiedTemplate
- All Implemented Interfaces:
Serializable, TemplateInterface
last-modified
times
for content that is processed through templates.
For traditional web content that is stored in a file, it is easy to
keep track of the last time the content changed, simply by looking at the
modify-time attribute of the file. Many browsers (and caches) use
this information,
obtained from the last-modified
http header to determine
whether to use an existing copy of the document, or a cached copy.
When the content is dynamically transformed, however, the last modified time is more complex: a combination of the original file modification time combined with the last change made to the transformation parameters.
A new HTML tag,
<modified>
is defined, and is intended to be
used in conjunction with the BSLTemplate. When present in a
page, the last-modified
time of the transformation
is set to the server's current time. When the content is delivered
to the client, the last-modified
header is set to the
more recent of the origin last-modified time and the transformation
modified time.
Properties:
- debug
- If this configuration parameter is present,
modified
tag is replaced by a comment. Otherwise it is removed from the document.
- Version:
- %V% 07/01/08
- Author:
- Stephen Uhler
- See Also:
-
Field Summary
-
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionboolean
done
(RewriteContext hr) Compute the http last modified value by comparing the origin last-modified value (if any) with the transform valuevoid
Set the content transformation modifiy time to NOW
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Constructor Details
-
ModifiedTemplate
public ModifiedTemplate()
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-
Method Details
-
tag_modified
Set the content transformation modifiy time to NOW -
done
Compute the http last modified value by comparing the origin last-modified value (if any) with the transform value- Specified by:
done
in interfaceTemplateInterface
- Overrides:
done
in classTemplate
-