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https://issues.apache.org/jira/browse/WICKET-1556?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Johan Compagner closed WICKET-1556.
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       Resolution: Fixed
    Fix Version/s: 1.3.4

> Non-existant package resources lazily added to pool
> ---------------------------------------------------
>
>                 Key: WICKET-1556
>                 URL: https://issues.apache.org/jira/browse/WICKET-1556
>             Project: Wicket
>          Issue Type: Bug
>          Components: wicket
>    Affects Versions: 1.3.3
>         Environment: any environment
>            Reporter: Nathan Hamblen
>            Assignee: Johan Compagner
>             Fix For: 1.3.4
>
>         Attachments: lazy-res.diff
>
>
> When a SharedResourceRequestTarget is looking for a resource respond to the 
> request, it can (improperly) create a package resource that does not exist 
> and add it to the shared resource pool. While this doesn't pose an immediate 
> problem, it has a seriously side effect for auto-link resolution in 
> subsequent requests. If a local-specific potential name coincides with the 
> non-existant shared resource, that bad reference will be used to generate the 
> auto-link URL.
> For example:
> A page refers to href="style.css" in an autolink. This loads correctly, UNTIL 
> anyone on the internet requests "style_en.css" (which could be an old 
> resource name still known to crawlers). Now that name is added to the 
> resource pool, and the next request for locale "en" will find that bad 
> resource in pool, thinking it is a good local-specific stylesheet, and render 
> href="style_en.css" for the page. This resource does not exist, will not be 
> found, and all "en" users will now see the page without styles.
> This is fully reproducible in Wicket 1.3.3, while 1.3.2 is not susceptible. 
> I'm not sure where the effective code change was (it doesn't seem to be in 
> this chunk of code), but this particular problem can be easily fixed by 
> checking if a resource exists before trying to "get" it and add it to the 
> pool. Will upload patch.

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