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https://issues.apache.org/jira/browse/SLING-9230?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17064048#comment-17064048
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Konrad Windszus commented on SLING-9230:
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Sling is not bound to the JCR Resource Provider and does not define any
limitation on {{sling:resourcType}} value
(https://sling.apache.org/documentation/the-sling-engine/resources.html#resource-types).
Introducing such limitations now only because Oak cannot correctly deal with
such values can lead to unexpected regressions. IMHO the fix in Oak should be
enough.
> Servlet should not be allowed to register with invalid ResourceTypes
> --------------------------------------------------------------------
>
> Key: SLING-9230
> URL: https://issues.apache.org/jira/browse/SLING-9230
> Project: Sling
> Issue Type: Bug
> Components: Servlets
> Affects Versions: Servlets Resolver 2.6.4
> Reporter: rafiya sirin
> Priority: Minor
> Attachments: Screen Shot 2020-03-10 at 10.12.54 PM.png, stacktrace.txt
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Servlets are allowed to register even when the resource types are specified
> as
> SLING_SERVLET_RESOURCE_TYPES + "=" + "[/test,/path]"
> This is invalid because getOakPath for paths starting with "[" and ending
> with "]" return null. This creates an unwanted scenario where
> ResourceChangeListeners fail to register with a NPE. The NPE on JCR is fixed
> with commit :
> [https://github.com/apache/jackrabbit-oak/commit/2e37d7a507186484e13897549681bf29b17461fc]
>
> However we should still fix this in sling, to not accept resource types which
> start with "[" and end with "]"
> JCR code which returns null :
> [https://github.com/apache/jackrabbit-oak/blob/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/namepath/impl/NamePathMapperImpl.java#L91]
>
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