Setting a string parameter inside struts.xml action from a properties file

Question

I've been trying to implement an action which allows the user to download a file with a specific filename. This filename is set by passing the action a parameter through struts.xml this way:

<result name="success" type="stream">
            <param name="contentType">application/octet-stream</param>
            <param name="inputName">input_document</param>
            <param name="contentDisposition">attachment;filename=foo.bar</param>
            <param name="bufferSize">1024</param>
</result>

I have omitted the rest of the code as I just want to focus on this:

<param name="contentDisposition">attachment;filename=foo.bar</param>

That way it works perfectly and lets you download the foo file with .bar extension.

So here's the deal, I was curious to know wether if is it possible to retrieve the extension from a properties file and pass it through the parameter, for example, like this:

<param name="contentDisposition">attachment;filename=foo%{+ getText("EXTENSION_KEY_IN_PROPERTIES_FILE")}</param>

I know that getText("...") won't work but I just want you to understand what I'm searching for.

I'm currently working with some properties files for global parameters and localization stuff so it would be great if I could retrieve this file extension from one of them.

Answer 1

It should work if your action implements TextProvider

<param name="contentDisposition">attachment;filename=foo${getText('EXTENSION_KEY_IN_PROPERTIES_FILE')}</param>