Re: Download File GWT

thanks

 

On Mon, Mar 3, 2014 at 12:37 PM, JeongHyeon Lee <junghyun@ask.sarang.net> wrote:

class DownloadServlet extends HttpServlet {

  private void getDownloadFile(final HttpServletRequest request, final HttpServletResponse response) {
    FileVO file = fileService.getFile(request.getParameter("down").toString());
    if (file == null) {
      return;
    }
    String ua = getThreadLocalRequest().getHeader("User-Agent");
    boolean isFirefox = (ua != null && ua.indexOf("Firefox/") != -1);
    String uriEncoding = null;
    try {
      // I18N
      uriEncoding = URLEncoder.encode(file.getFILE_NAME(), "UTF-8");
    } catch (UnsupportedEncodingException e) {
    }
    if (isFirefox) {
      response.setHeader("Content-Disposition", "attachment; filename*==UTF-8''" + uriEncoding + "");
    } else {
      response.setHeader("Content-Disposition", "attachment; filename=" + uriEncoding + "");
    }
    response.setHeader("Content-Length", String.valueOf(file.getFILE_LONGBLOB_SIZE()));
    try {
      response.getOutputStream().write(file.getFILE_LONGBLOB());
      response.getOutputStream().flush();
      response.getOutputStream().close();
    } catch (IOException e) {
      log.error(e);
    }
  }

  @Override
  protected void doGet(final HttpServletRequest request, final HttpServletResponse response)
      throws IOException, ServletException {

    if (request.getParameter("down") != null {
      getDownloadFile(request, response);
    }

  }

}

2014-03-03 19:58 GMT+09:00 Davide Micheletti <d.micheletti91@gmail.com>:

Hi all.. I need to know how to use DownloadServlet.. I tried to implement it but i don't understand how to continue the code.. here my implementation

    public class DownloadServlet extends HttpServlet{      protected void doGet( HttpServletRequest req, HttpServletResponse resp ) throws ServletException, IOException          {              String fileName = req.getParameter( "fileInfo1" );                int BUFFER = 1024 * 100;              resp.setContentType( "application/octet-stream" );              resp.setHeader( "Content-Disposition:", "attachment;filename=" + "\"" + fileName + "\"" );              ServletOutputStream outputStream = resp.getOutputStream();              resp.setContentLength( Long.valueOf( getfile(fileName).length() ).intValue() );              resp.setBufferSize( BUFFER );              //Your IO code goes here to create a file and set to outputStream//            }      }

what do i need now??.. Thanks in advance

Davide

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