Re: How to handle exception on File Upload in stripes.

Tissen wrote:

> Could anybody suggest a way to handle this exception (not using
> commong Error page)?

I think some new stuff is coming for this in 1.5, but for 1.4 it's still
fairly easy to do.  See
http://stripes.sourceforge.net/docs/current/javadoc/net/sourceforge/stripes/exception/DelegatingExceptionHandler.html

You'll need this in your web.xml:

<init-param>
     <description>Stripes exception handler</description>
     <param-name>ExceptionHandler.Class</param-name>
 
<param-value>net.sourceforge.stripes.exception.DelegatingExceptionHandler</param-value>
</init-param>
<init-param>
     <description>Stripes exception resolver filter</description>
     <param-name>DelegatingExceptionHandler.UrlFilters</param-name>
     <param-value>WEB-INF/classes</param-value>
</init-param>

The I have a class like this:

public class UploadExceptionHandler implements AutoExceptionHandler {

     /**
      * Handle a file upload exception.
      * @param e the exception to handle.
      * @param request the upload request.
      * @param response the upload response.
      * @return a redirect to the error page.
      */
     public Resolution handle(FileUploadLimitExceededException e,
       HttpServletRequest request, HttpServletResponse response) {
         RedirectResolution r =
           new RedirectResolution("/error/upload.jsp");
         r.addParameter("posted", e.getPosted() / 1048576.0);
         r.addParameter("maximum", e.getMaximum() / 1048576.0);
         return r;
     }
}

And a JSP like this:

         <h2>File Upload Error</h2>
         <p class="error">
         You attempted to upload a file that was
         <fmt:formatNumber value="${param.posted}"
             maxFractionDigits="1"/>Mb
         in size, the maximum allowed file size is
         <fmt:formatNumber value="${param.maximum}"
             maxFractionDigits="1"/>Mb.
         Please only upload valid files.
         </p>

--
Alan Burlison
--

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