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https://issues.apache.org/struts/browse/WW-2464?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=44309#action_44309
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Wes Wannemacher commented on WW-2464:
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If my understanding is correct, you need to add the "params" interceptor to get
the request parameters copied to the parameterMap. I could be wrong though, I
didn't look thoroughly through the code. But, fileUploadStack does not call the
"params" interceptor. Can you post your action configuration (struts.xml)?
> Multipart request parameters not copied into parameterMap
> ---------------------------------------------------------
>
> Key: WW-2464
> URL: https://issues.apache.org/struts/browse/WW-2464
> Project: Struts 2
> Issue Type: Bug
> Components: Core Actions
> Affects Versions: 2.0.11
> Environment: Windows XP - Tomcat 6
> Reporter: Spec Dev
> Fix For: 2.1.3
>
> Attachments: multipart post.PNG
>
>
> Multipart request parameters aren't being copied into the parameterMap.
> Hence, doing HttpServletRequest.getParameter("xxx") return null for all
> multipart parameters.
> A org.apache.struts2.dispatcher.StrutsRequestWrapper is passed when a GET or
> POST action is executed.
> However, a org.apache.struts2.dispatcher.multipart.MultiPartRequestWrapper
> is used for "multipart/form-data" POST actions.
> The org.apache.struts2.dispatcher.multipart.MultiPartRequestWrapper has an
> attribute of type
> org.apache.struts2.dispatcher.multipart.JakartaMultiPartRequest which in turn
> maintains a HashMap attribute named "params".
> "params" contains the multipart request parameters and those parameter are
> never copied into the parameterMap.
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