download report + struts 2

[aneesh vijayakumar]

Hello,

I am using struts 2 in my application. I have to do report download. I am doing the report build in one action and then moving to another page. I need the download option to come when i move to the page after report build.

For the reporting stuff i am using jasper reporting.
I gave like

response.sendRedirect("../../../images/upload/reportDestDir/1GenericReport.pdf");

in the downloadDetailsPage.

In struts i gave like

<action name="download" class="com.trivand.apps.autos.action.***Action" method="downloadReport">
<result name="success">/pages/common/public/downloadDetailsPage.jsp</result>
</action>

But i need to do it like after the action is performed it should go to the downloadDetailsPage and show the download or openwith option..

Please help me out...

Thanks in advance

Aneesh

[aneesh vijayakumar]

Hello,

I have done the download

I did like

<!--contents of download.jsp-->
<%@ page import="java.util.*,java.io.*"%>
<!--Assumes that file name is in the request objects query Parameter -->
 
<%
//read the file name.

File f = new File ("c:/trivand/project/autos/webcontent/images/upload/reportDestDir/1GenericReport.pdf" );
//set the content type(can be excel/word/powerpoint etc..)
response.setContentType ("application/pdf");
//set the header and also the Name by which user will be prompted to save
response.setHeader ("Content-Disposition", "attachment;filename=\"AutoDetail.pdf\"");

//get the file name
String name = f.getName().substring(f.getName().lastIndexOf("/") + 1,f.getName().length());
//OPen an input stream to the file and post the file contents thru the 
//servlet output stream to the client m/c

InputStream in = new FileInputStream(f);
ServletOutputStream outs = response.getOutputStream();
out.clearBuffer();
int bit = 256;
    try {
      while ((bit) >= 0) {
      bit = in.read();
      outs.write(bit);
        }
        } catch (IOException ioe) {
            ioe.printStackTrace(System.out);
            }
        outs.flush();
    outs.close();
    in.close();
    
 %>

Now the download option is working..But there is some error in console like

java.lang.IllegalStateException: getOutputStream() has already been called for this response

It is actually not affecting the result. When i googled it, its given like this is not a critical error.

If anyone has a resolution to it please post here...

Thanks
Anees

[David Newton]

Why not use the "stream" result type?

http://struts.apache.org/2.x/docs/stream-result.html

[aneesh vijayakumar]

Thanks David for the suggestion

But i am using tiles in my application.

So I gave like

<action name="download" class="com.trivand.apps.autos.action.***Action" method="downloadReport">
<result name="success" type="tiles">***.****.downloadAuto</result>
</action>

Is there any specific advantage of using stream result in downloading?

Thanks
Aneesh

[David Newton]

Yes, it writes the result for you, and everything is set from the config. Less code == good.