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https://issues.apache.org/jira/browse/WW-4164?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lukasz Lenart updated WW-4164:
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Fix Version/s: 2.5
> Improve support for multiple extensions
> ---------------------------------------
>
> Key: WW-4164
> URL: https://issues.apache.org/jira/browse/WW-4164
> Project: Struts 2
> Issue Type: Improvement
> Components: XML Configuration
> Affects Versions: 2.3.15.1
> Reporter: Jasper Rosenberg
> Fix For: 2.5
>
>
> Currently if you support multiple extensions (eg.
> struts.action.extension=action,html,,) there is no way to tell struts for a
> particular action which extension you always want to use. This has two
> downsides:
> 1. When struts has to generate an url, for example in the form tag, or the
> "redirectAction" result type, there is no way to specify the extension to
> use, so it ends up using the current invocation's extension if possible, or
> otherwise the default, neither of which might be correct.
> 2. You can invoke the action with any of the supported extensions, creating
> duplicate pages with no clear canonical version. (Bad for SEO as well)
> What I propose is allowing the user to specify an optional specific extension
> at the package and action level in the struts xml configuration like so:
> {code:xml}
> <package name="test" namespace="/" extends="default" extension="action">
> <action name="a1" extension="">
> <result>a1.ftl</result>
> </action>
> <action name="b1" extension="html">
> <result>b1.ftl</result>
> </action>
> <action name="c1">
> <result>b1.ftl</result>
> </action>
> </package>
> {code}
> 1. When selecting an extension when building an URL for an action, it would
> first see if there was an extension to use at the action level. If not it
> would check the package level (including package inheritance). If still no
> specific extension, it would behave as it currently does.
> 2. When mapping an incoming URL to an action, the reverse will also hold. If
> the action or its package specify a specific extension, then the action can
> only be matched if the URL has that extension.
> So in the above example, the following urls would be expected to work:
> 1. /a1 (action level no extension)
> 2. /b1.html (action level "html" extension)
> 3. /c1.action (no action level extension, using package level "action"
> extension)
> However, an url like "/b1.action" will not match any actions because "action"
> extension doesn't match the action's "html" extension.
> This change would be 100% backwards because if you don't specify any
> extension attributes on the package or action, it falls back to the current
> behavior.
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