Open file-download window from servlet

Question

Hi all,
          This is the scenario I'm trying to achieve:
          - Display html page with a button or href "download csv file"
          - the user clicks
          - the file-download pop-up window should appear,so the user can save the
          file at any location
          This is how far I get:
          - when the user clicks a servlet gets activated
          - Servlet:
          - creates the csv file and write it to disk
          - now I want the servlet to do something so that the file-download window
          opens
          - I've tried with forward the request to the url (which only displays the
          content in the browser)
          - I write to HttpServletResponse it opens the file in excel which I don't
          want
          Any ideas ?
          Thanks in advance
          Per
          

Answer 1

Thanks Mettu,
          that worked fine.
          This is what the code looked like:
          ...Per
          ==========================================================================
          if (nextPage.getType()== Page.TYPE_CSV)
          String filePath = (String) req.getAttribute(Attribute.CSV_FILE_PATH);
          String fileName = (String)
          req.getAttribute(Attribute.CSV_FILE_NAME);
          file://Writing text file like this enforces fileDownload popup
          window
          res.setContentType("application/RFC822");
          res.setHeader("Content-Disposition", "attachment; filename=\"" +
          fileName);
          writeFileToOutStream(res,filePath,fileName);
          private void writeFileToOutStream(HttpServletResponse res,String
          filePath,String fileName) throws IOException
          OutputStream out1 = res.getOutputStream();
          FileInputStream fin = new FileInputStream(filePath + fileName);
          byte [] b = new byte[1024];
          int size = 0;
          while((size = fin.read(b, 0, 1024)) > 0)
          out1.write(b, 0, size);
          fin.close();
          out1.flush();
          out1.close();
          ==========================================================================
          "Mettu Kumar" <[email protected]> wrote in message
          news:[email protected]...
          > Per,
          >
          > For this to work in both Netscape and IE, You need You need to set
          content
          > Type and Also a header information.
          >
          > Set Content Type As : Content-type: application/RFC822
          > set the Header "Content-Disposition" to "attachment; filename=\"" +
          > youfilename + "\""
          > Where youfilename is the name of the file you display to
          user.
          >
          > If you want the exact java code use the following two lines of code in
          your
          > servlet:
          > res.setContentType("Content-type: application/RFC822");
          > res.setHeader("Content-Disposition", "attachment; filename=\"" +
          youfilename
          > + "\"");
          >
          >
          > This should solve your problem.
          >
          >
          > Kumar.
          >
          > Per Lovdinger wrote:
          >
          > > Hi all,
          > >
          > > This is the scenario I'm trying to achieve:
          > >
          > > - Display html page with a button or href "download csv file"
          > > - the user clicks
          > > - the file-download pop-up window should appear,so the user can save
          the
          > > file at any location
          > >
          > > This is how far I get:
          > > - when the user clicks a servlet gets activated
          > > - Servlet:
          > > - creates the csv file and write it to disk
          > > - now I want the servlet to do something so that the file-download
          window
          > > opens
          > >
          > > - I've tried with forward the request to the url (which only displays
          the
          > > content in the browser)
          > > - I write to HttpServletResponse it opens the file in excel which I
          don't
          > > want
          > >
          > > Any ideas ?
          > > Thanks in advance
          > > Per
          >