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https://issues.apache.org/struts/browse/WW-1976?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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James Holmes updated WW-1976:
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Affects Version/s: 2.0.9
> FileUpload does not ignore 0 byte files when using Jakarta FileUpload impl
> --------------------------------------------------------------------------
>
> Key: WW-1976
> URL: https://issues.apache.org/struts/browse/WW-1976
> Project: Struts 2
> Issue Type: Bug
> Components: Interceptors
> Affects Versions: 2.0.8, 2.0.9
> Reporter: Aymeric Levaux
> Assignee: James Holmes
> Fix For: Future
>
> Attachments: JakartaMultiPartRequest.java.patch
>
>
> When not selecting any file to upload in a file input, Struts does not ignore
> the 0 byte file returned by jakarta FileUpload.
> This means that a file is injected in the action even if nothing was
> uploaded.
> In webwork the check was done in the constructor of
> com.opensymphony.webwork.dispatcher.multipart.JakartaMultiPartRequest:
> else if (item.getSize() == 0) {
> log.warn("Item is a file upload of 0 size, ignoring");
> }
> In struts the parsing of the request moved from the constructor to a parse
> method but the above check disappeared.
> Additionally this behaviour is inconsistant with the "pell" implementation
> that ignores 0 byte files.
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