package org.kuali.student.common.ui.server.gwt;

 import java.io.IOException;

 import javax.servlet.ServletOutputStream;

 import javax.servlet.http.HttpServlet;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import org.apache.log4j.Logger;

 import org.kuali.student.common.ui.client.util.ExportUtils;

 public class ExportDocumentDownload extends HttpServlet {

     final Logger LOG = Logger.getLogger(ExportDocumentDownload.class);

     private static final long serialVersionUID = 1L;

     public void doGet(HttpServletRequest request, HttpServletResponse response) {

         try {

             // If PDF is generated to to temp file, read it

             String exportId = request.getParameter("exportId");

             String format = request.getParameter("format");

             // Get from session the byte array that was cached by the GWT Servlet

             byte[] bytes = (byte[]) request.getSession().getAttribute(exportId);

             sendPDF(response, bytes, format);

         } catch (Exception ex) {

             // TODO Nina how must we handle exceptions here??

             // do something here

         }

     }

     void sendPDF(HttpServletResponse response, byte[] bytes, String format) throws IOException {

         ServletOutputStream stream = response.getOutputStream();

         if (format.equals(ExportUtils.PDF)) {

             response.setContentType("application/pdf");

             response.addHeader("Content-Type", "application/pdf");

             response.addHeader("Content-Disposition", "inline; filename=export.pdf");

             response.setContentLength((int) bytes.length);

         } else {

             response.setContentType("application/ms-word");

             response.addHeader("Content-Type", "application/ms-word");

             response.addHeader("Content-Disposition", "inline; filename=export.doc");

             response.setContentLength((int) bytes.length);

         }

         stream.write(bytes);

         stream.close();

     }

 }