Download Dialog Box appears twice

Question

Hi,
I've a javascript page that make a pdf document in the fly and download that document.
Everything is fine, but when the File Download window appears,
if I press the OPEN button another File Download window opens with the same question.
Then after I select to OPEN the file twice the .PDF is displayed.
So the first window is unnecessary and undesired!
How can I remove this first File Download window??
If I select the SAVE button at the first time, it works.
I've already theses lines:
String stringFile = (string with the decoded file)
arquivoPDF = new StringBuffer( stringFile );
byte[] buffer = Base64.decode( arquivoPDF.toString() );
out.clear();
response.setContentType("application/pdf");
response.setHeader("Transfer-Encoding","base64");
response.setHeader("Content-Disposition", "attachment; filename=\"" + "teste.pdf" + "\"");
response.setContentLength(buffer.length);
response.getOutputStream().write(buffer, 0, buffer.length);
I did some research, but didn't find a resolution.
Thanks for any help,
maklima

Answer 1

The form should arrive at the server once, the previous reuqest is discarded....
But we are not talking forms or javascript here.
A simple setup:
My hyperlink:
<a href="<%=request.getContextPath()%>/querydownload">Download</a>
In web.xml:
<servlet-mapping>
<servlet-name>DownloadCSV</servlet-name>
<url-pattern>/querydownload</url-pattern>
</servlet-mapping>
Servlet:
<snip>
response.addHeader("Content-Disposition", "attachment;filename=blah.csv"));
response.setContentType("text/comma-separated-values");
OutputStreamWriter oStream = new OutputStreamWriter(response.getOutputStream());</snip>
then write() to oStream, flush() and close()
That will popup the download-box twice....