file download

I am developing a file download jsp page. But i am facing problem while
supporting download for different mime types. I have some confusions :
1) When i write file with "application/octet-stream", netscape shows
the save dialog box,and save it as a .exe.jsp file. but we can rename it to the actual type and it works fine. so how to instruct netscape to save the file as "application".
(2) If i write the file with "text/plain" mime type, browser opens the
file, but i want it to save the file, instead of opening it.
3) How can i set the file name in the save dialog of the browser?
thanks in advance

Take a look at JspBrowser:
http://www.vonloesch.de/jspbrowser.html
It's a free, open-source JSP file browser/downloader. The code inside it is messy (to say the least), but it might have the answer for you. I'm actually working right now on cleaning it up and making the code "prettier" (and adding real MP3 support)
brian