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();
      }
  }