Want to force "Save As" dialogue

Question

          Within a servlet, I have a byte[] containing data that I want to send to the user.
          I want to force the "save file as" dialogue box to appear, so I'm setting the
          content-type on the response to "application/octet-stream" and then writing to
          an OutputStream on the response. It's not working; can anyone help?
          (code snippet below)
          byte[] data = getTheData();
          res.setContentType("application/octet-stream");
          ByteArrayOutputStream byteStream = new ByteArrayOutputStream(data.length);
          PrintWriter printOut = new PrintWriter(byteStream, true);
          res.setContentLength(data.length);
          ServletOutputStream out = res.getOutputStream();
          byteStream.writeTo(out);
          

Answer 1

Hi Laura,
          I can't tell what you are doing with all of those streams and writers. Try
          something like this (adjust content type as necessary):
          byte[] data = getTheData();
          res.setContentType("image/gif");
          res.setContentLength(data.length);
          ServletOutputStream out = res.getOutputStream();
          res.write(data);
          Note: To get the "image/gif" or "application/x-zip-compressed" or whatever,
          just look in Windows RegEdit in the HKEY_CLASSES_ROOT section under the .gif
          or .zip or whatever extension. It will show you the content type (mime).
          Note: The default file name can come from a special header or a meta tag,
          but the easiest way is to have the last part of the URL be the proposed file
          name; for example, the following will propose the file to be saved as
          "some.zip":
          http://www.myco.com/myapp/download/some.zip
          (Make sure that /download/* is mapped to your Servlet ... otherwise WebLogic
          will think it is a file request. Generally speaking, you want to completely
          turn off file service via WebLogic except for .gif and .jpg and .html
          maybe.)
          Peace,
          Cameron Purdy
          Tangosol Inc.
          Tangosol Coherence: Clustered Coherent Cache for J2EE
          Information at http://www.tangosol.com/
          "Laura Crook" <[email protected]> wrote in message
          news:[email protected]...
          >
          > Within a servlet, I have a byte[] containing data that I want to send to
          the user.
          > I want to force the "save file as" dialogue box to appear, so I'm setting
          the
          > content-type on the response to "application/octet-stream" and then
          writing to
          > an OutputStream on the response. It's not working; can anyone help?
          > (code snippet below)
          > -------------------
          > byte[] data = getTheData();
          > res.setContentType("application/octet-stream");
          > ByteArrayOutputStream byteStream = new ByteArrayOutputStream(data.length);
          > PrintWriter printOut = new PrintWriter(byteStream, true);
          > res.setContentLength(data.length);
          > ServletOutputStream out = res.getOutputStream();
          > byteStream.writeTo(out);