Shuai Zheng wrote:
But I may not know the filename, contentType, etc (because these files are
uploaded by the user).

http://struts.apache.org/2.0.6/struts2-core/apidocs/org/apache/struts2/dispatcher/StrutsResultSupport.html
http://struts.apache.org/2.0.6/struts2-core/apidocs/com/opensymphony/xwork2/util/TextParseUtil.html#translateVariables(java.lang.String,%20com.opensymphony.xwork2.util.ValueStack)

<action name="download2" class="
org.apache.struts2.showcase.filedownload.FileDownloadAction">
  <result name="success" type="stream">
    <param name="contentType">${dbFile.contentType}</param>
    <param name="contentLength">${dbFile.contentLength}</param>
    <param name="inputName">inputStream</param>
    <param name="contentDisposition">filename="${dbFile.filename}"</param>
    <param name="parse">true</param>
  </result>
</action>

-Dale

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