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https://issues.apache.org/struts/browse/WW-1976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=43388#action_43388
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Anne Lee commented on WW-1976:
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Hi, I have a question about the 0 byte files verification.
Does the verification code in JakartaMultiPartRequest.java.patch is a formal
release?
Because I don't see this code in struts-2.0.11 and it still has exception when
user try to upload a 0 byte file.
> 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: Core Interceptors
> Affects Versions: 2.0.8, 2.0.9
> Reporter: Aymeric Levaux
> Assignee: James Holmes
> Fix For: 2.0.10
>
> 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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