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https://issues.apache.org/jira/browse/SLING-10225?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17360811#comment-17360811
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Robert wunsch commented on SLING-10225:
---------------------------------------
Not allowing "empty selectors" will cause problems (eg. Classic UI creates URLs
with empty selectors).
The reason/background for SLING-10225 was - not to interpret "/...<extension>"
(eg. "<url>/...html") as "even though the resource does not exist, move one
level up and deliver the parent-resource".
I would assume a lot of projects might have "empty selectors" in their code ,
something like "<url/<valid-resource-name>.<selector1>..html" .
If empty selectors are not longer allowed, this will cause trouble for multiple
SLING projects, I imagine.
So I would see the solution for both problems to allow "..<extension>" as
"empty-selector, but NOT to interprete this as "resolve to the parent resource".
Hope this makes sense.
> Files with ".." In Name Throw 400 Exception
> -------------------------------------------
>
> Key: SLING-10225
> URL: https://issues.apache.org/jira/browse/SLING-10225
> Project: Sling
> Issue Type: Bug
> Components: Engine
> Affects Versions: Engine 2.7.4
> Reporter: Dan Klco
> Assignee: Karl Pauls
> Priority: Critical
> Fix For: Engine 2.7.6
>
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> SLING-9741 and the [associated
> PR|https://github.com/apache/sling-org-apache-sling-engine/pull/11]
> introduced a regression where the Sling Engine will return a 400 error on
> requests based on the presence of ".." in the URL when not preceded by a
> slash.
> This is an issue as file names may contain multiple periods and it is not
> obvious that it would cause an issue to upload a file with two periods in the
> name.
> h2. Reproduction steps:
> * Update a Sling instance to use Engine 2.7.4
> * Upload a file containing .. in the path
> * Attempt to get the file or any path with the file as a suffix
> * Note this returns a 400 error
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