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From Victor Hadianto <vict...@nuix.com.au>
Subject Re: Writing to response's OutputStream cause problem.
Date Thu, 01 May 2003 10:22:41 GMT
Hmm tried that and it still doesn't work. I have all the header and content 
type information as you pointed out. The following is the code

<snip>
        File file = new File(zipFilePath);
        
        response.setContentType(MimeUtils.APPLICATION_X_ZIP);
        response.setContentLength((int) file.length());

        response.setHeader("Content-Disposition", "attachment; filename=\"" + 
userFileName + "\";");
        response.setHeader("Pragma", "cache");
        response.setHeader("Cache-control", "cache");
        
        // Now write the zip file to the response's output stream.
        FileInputStream in = new FileInputStream(zipFilePath);
        BufferedInputStream bin = new BufferedInputStream(in);
        
        byte[] buf = new byte[1024];
        int length;
        while ((length = bin.read(buf)) != -1) {
            response.getOutputStream().write(buf, 0, length);
        }
        
        bin.close(); in.close();
        response.getOutputStream().close();
        
        // Need to delete the zip file.
        file.delete();
<snip>

Don't know what's wrong though. I looked through your code and I don't think I 
can find any significant differences with mine.

Stumped again.

thanks,

victor


On Thu, 1 May 2003 07:54 pm, harm@informatiefabriek.nl wrote:
> First of all, you are better of using a buffer when reading files.
> I had the same problem you described. Look at my code which now works:
>
> /* Read the file and output it to the servlet outputstream */
> try {
>         InputStream is = new BufferedInputStream(new
> FileInputStream(valueObj.getPath()));
>         File f = new File(valueObj.getPath());
>
>         OutputStream os = response.getOutputStream();
>
>         //      Report the type and size of content being sent back.
>         response.setContentType("application/pdf");
>         response.setContentLength((int) f.length());
>
>         response.setHeader("Cache-Control", "no-cache");
>         response.addHeader("Content-disposition",
>                                   "attachment; filename=" +
>                                   f.getName());
>         byte[] buffer = new byte[1024]; /*or whatever size*/
>
>         int read = is.read(buffer);
>         while (read >= 0) {
>                 if (read > 0)
>                         os.write(buffer, 0, read);
>                 read = is.read(buffer);
>         }
>
>         is.close();
>         os.close();
> } catch (IOException e) {
>         e.printStackTrace();
> }
>
>
>
>
>
> Victor Hadianto <victorh@nuix.com.au>
> 05/01/2003 11:35 AM
> Please respond to
> "Tomcat Users List" <tomcat-user@jakarta.apache.org>
>
>
> To
> tomcat-user@jakarta.apache.org
> cc
>
> Subject
> Writing to response's OutputStream cause problem.
>
>
>
>
>
>
> Hi List,
>
> I have a servlet that fetches a file from the server and send this to the
> reponse's output stream. The code looks something like this:
>
> <snip>
>
> FileInputStream in = new FileInputStream("/tmp/filename");
> byte[] buf = new byte[1024];
> int length;
> while ((length = in.read(buf)) != -1) {
>             response.getOutputStream().write(buf, 0, length);
> }
>
> <snip>
>
> Now this is working fine, but I have this irritating problem. Say from the
> web
> browser my user clicks on the link to retrieve the file:
>
> .../process.do?fileId=5
>
> The first thing that the user see is the dialog box saying:
>
> "You are downloading the file:
> ../process.do?fileId=5 from hostName
>
> Would you save ... "
>
> After this dialog box I got the "real" dialog box that says:
>
> "Downloading file xyz.zip from hostName ..."
>
> I'm puzzled I don't know what went wrong here. Does anyone have a solution
> for
> this problem?
>
> Many thanks in advance, any help will be much appreciated.
>
> victor
>
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-- 
Victor Hadianto

NUIX Pty Ltd
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