Re: Servlet and text/plain

[Art Smet <smet@xxxxxxxxxx>]

I know the following will force a Save dialog at the browser, I think it is
the resp.setContentType( ) that really does the trick.  You can use the
following code as a basis, and extract what you need to pull off the Save
dialog for your code.

import java.io.*;
import java.net.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import com.oroinc.text.perl.*;

public class BigDownloadTest extends HttpServlet {
      public void doGet( HttpServletRequest req, HttpServletResponse resp )
throws ServletException, IOException {

            long bytes = Long.parseLong(req.getParameter("bytes"));
                  File tempFile = File.createTempFile("download", ".zip");


            //no filename specified, so lets fashion something as long as
the bytes they specified.
            java.io.FileOutputStream fos = new
java.io.FileOutputStream(tempFile);
            byte [] array = {'9','8','7','6','5','4','3','2'};
            long l;
            for(l = 0; l < bytes-8; l+=8){
                  fos.write(array);
            }
            fos.write(array,0,(int)(bytes-l));

            String type =
getServletContext().getMimeType(tempFile.getAbsolutePath());
            if (type != null)
            {
                  resp.setContentType(type);
            }

            resp.setDateHeader("last-modified", tempFile.lastModified());
            resp.setContentLength(new Long(tempFile.length()).intValue());

            FileInputStream in = new FileInputStream(tempFile);
            try
            {
                  ServletOutputStream out = resp.getOutputStream();
                  byte[] buf = new byte[4096];
                  int numRead = in.read(buf);
                  while (numRead != -1)
                  {
                        out.write(buf, 0, numRead);
                        numRead = in.read(buf);
                  }
            } finally {
                  in.close();
            }
      }
}





|---------+------------------------------>
|         |           "Mark Phippard"    |
|         |           <MarkP@xxxxxxxxxxxx|
|         |           com>               |
|         |           Sent by:           |
|         |           java400-l-bounces@x|
|         |           idrange.com        |
|         |                              |
|         |                              |
|         |           03/19/2003 07:30 PM|
|         |           Please respond to  |
|         |           Java Programming on|
|         |           and around the     |
|         |           iSeries / AS400    |
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  |       To:       Java Programming on and around the iSeries / AS400 
<java400-l@xxxxxxxxxxxx>                 |
  |       cc:                                                                   
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  |       Subject:  Re: Servlet and text/plain                                  
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>-------------------------------------------------------------------------------------------------------------|





Larry,

If you find a way that is 100% I'd love to know.  We cannot find a way even
when sending something like a PDF.  We have searched a lot of web forums to
know avail.  The best you can do is give the browser some "hints" in the
headers.  There is one where you give it the filename you want to use, I
think another where you say it is an attachment, and of course there is the
mime type.

In general, we have found that if IE feels it can handle the type, it will
regardless of what you say.  Netscape/Mozilla will generally do what you
want.

Good luck.

Mark




      To:   java400-l@xxxxxxxxxxxx
      cc:
      bcc:
      Subject:    Servlet and text/plain
"Larry" <larryhytail@xxxxxxxxx>
Sent by: java400-l-bounces@xxxxxxxxxxxx
03/19/2003 11:26 AM
Please respond to Java Programming on and around the iSeries / AS400
<font size=-1></font>






















Here's what I think should be a simple question, but I could not find the
answer.
I have a servlet that generates dynamic content in text/plain format that
the end user really does not want to display in his/her browser, but really
wants to accept it as a download file. If you click on my link to the
servlet, currently it builds the data and displays it in text in the
browser.
Of course the user could right click and do "save file as" to stream it
directly to a file on his/her hard drive, but that is not elegant. How do I
make the servlet automatically bring up the save file dialog?
Thanks,
Larry

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