Struts Download action portlet:UnsupportedEncodingException

Hi,
I'm developing a struts application inside Oracle Portal, when i click on a
action link i need to download a file.
<pdk-struts-html:link action="/fileDownload2Action?file=myfile.txt">Click Here to See the PDF</pdk-struts-html:link>
i've tried to use org.apache.struts.actions.DownloadAction as follows:
public class MyExampleFileDownload extends DownloadAction{
protected StreamInfo getStreamInfo(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
// File Name
String fileName = mapping.getParameter();
// Set the content disposition
response.setHeader("Content-disposition",
"attachment; filename=" + fileName);
// Download a "pdf" file - gets the file name from the
// Action Mapping's parameter
String contentType = "application/pdf";
File file = new File(fileName);
return new FileStreamInfo(contentType, file);
but on the forward i receive the following exception:
received IOException
java.io.UnsupportedEncodingException: Media Type of a TextResponseWrapper must start with "text/"
at oracle.webdb.provider.v2.utils.http.TextResponseWrapper.getData(Unknown Source)
at oracle.webdb.provider.v2.utils.http.TextResponseWrapper.getData(Unknown Source)
at oracle.portal.provider.v2.render.http.AbstractResourceRenderer.renderBody(Unknown Source)
at oracle.portal.provider.v2.render.RenderManager.render(Unknown Source)
at oracle.portal.provider.v2.DefaultPortletInstance.render(Unknown Source)
at oracle.webdb.provider.v2.adapter.soapV1.ProviderAdapter.showPortlet(Unknown Source)
at oracle.webdb.provider.v2.adapter.soapV1.ProviderAdapter.handleHttp(Unknown Source)
at sun.reflect.GeneratedMethodAccessor119.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at oracle.webdb.provider.v2.adapter.SOAPServlet.doHTTPCall(Unknown Source)
at oracle.webdb.provider.v2.adapter.SOAPServlet.service(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:824)
at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:330)
at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:830)
at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.AJPRequestHandler.run(AJPRequestHandler.java:224)
at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.AJPRequestHandler.run(AJPRequestHandler.java:133)
at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:186)
---end
so it seems that struts forward in oracle have to be only text/html files
but i don't wanto to go tio another page, just download a file on the same page
after some control in my action.
Could you suggest me any alternative solution?
Regards,
Francesco Rizzello

Hi,
I have done everything as mentioned by various web sites to develop a pdk-struts form, my java code compiles, the jsps compiles everything compiles correctly, and the portal shows up.
I also put a HTML form in it.
When a I deploy I can see and work with the HTML form but the portal is not recogniziing the pdk-struts tags, though I made the pdk-struts-html.tld part of the WEB-INF/ yet it wont show up the pdk-struts form.
Any help regarding this will be highly appreciated.
Regards,
Ram Srinivasan

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finally{
try{
if(sessionToken!=null)
publicReportService.logout(sessionToken);
catch(Exception e){}
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