RE: Viewing .pdf files usign struts frames work..

[Andrew Hill <an...@gridnode.com>]

Since you are writing the response from your action you should return null
from execute() to indicate to struts that the response has been handled and
that it should not forward.

-----Original Message-----
From: Vasudevrao Gupta [mailto:vasudevrao.gupta@wipro.com]
Sent: Wednesday, 3 March 2004 22:58
To: 'Struts Users Mailing List'; 'Satya Narayan Dash'
Subject: Viewing .pdf files usign struts frames work..



Hi All,

I am trying to view a pdf file using struts frame work..
I am able to view the file ,but it throws an illegalStateException as struts
forward the request after I send the output stream.

Below is the action mapping:
<action name="enquiryFormBean"
				path="/viewScannedFile"
				scope="request"

type="com.rwe.thameswater.els.enquiry.action.ViewScannedFileRefAction"input=
"/screens/enquiry/jsp/ADS_ELS_CreateEnquiry.jsp"
validate="true">
<forward name="SUCCESS" path="/screens/enquiry/jsp/ADS_ELS_ScannedFile.jsp">
			</forward>
</action>

below is the action class execute() method:
try {

			MessageResources resource = this.getResources(request);
			String scannedFileFolder = (String)
resource.getMessage(ELSEnquiryConstantsIF.SCANNED_FILE_LOCATN);
			System.out.println("scannedFileFolder>>"+scannedFileFolder);
			String scannedFileExtn = (String)
resource.getMessage(ELSEnquiryConstantsIF.SCANNED_FILE_EXTN);
			System.out.println("scannedFileExtn>>"+scannedFileExtn);
			String scannedFileLocation = scannedFileFolder +
request.getParameter("scannedFileReference") + scannedFileExtn;
			System.out.println("scannedFileLocation>>"+scannedFileLocation);
			String contentType = (String)
resource.getMessage(ELSEnquiryConstantsIF.SCANNED_FILE_CONTENT);
			System.out.println("contentType>>"+contentType);
			response.setContentType(contentType);
			File pdfFile = new File(scannedFileLocation);
			response.setContentLength((int) pdfFile.length());
			FileInputStream in = new FileInputStream(pdfFile);
			request.setAttribute("FILE",in);
			OutputStream out = response.getOutputStream();

			byte[] buf = new byte[4096];
			int count = 0;
			while ((count = in.read(buf)) >= 0) {
				out.write(buf, 0, count);
			}
			out.flush();
			in.close();
			out.close();
		} catch (Exception e) {

			// Report the error using the appropriate name and ID.
			System.out.println("Exception found while viewing>>"+e);
			errors.add("name", new ActionError("id"));

		}
		return (mapping.findForward("SUCCESS"));
}

Please suggest me anyother alternative using the struts framework



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