Doubt in HTTPServletResponse

[Thirugnanam Saravanan]

Hi All,

I have tried this code from Head First book ( Chapter 4 ) to implement the jar download functionality in servlets. The code is working fine, but while downloading the file,it is not getting downloaded as jar file( with .jar extension). Instead it is getting downloaded as a file with unknown filetype. What's wrong with this code? What should I do to implement my code in such a way that, when i download, it should be downloaded as a .jar file? Any Ideas?

 
 protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
response.setContentType("application/jar");
ServletContext ctx = getServletContext();
InputStream is = ctx.getResourceAsStream("/bookcode.jar");
int read = 0;
byte[] bytes = new byte[1024];
OutputStream os = response.getOutputStream();
while ((read = is.read(bytes)) != -1) {
os.write(bytes, 0, read);
}
os.flush();
os.close();
}  
 
   

[ November 18, 2008: Message edited by: Thirugnanam Saravanan ]

[Amol Nayak]

Try adding this to the code before writing the response to output stream.

protected void doGet(HttpServletRequest request,
HttpServletResponse response)
 throws ServletException, IOException {
response.setContentType("application/jar");
        [B]
        response.setHeader("Content-Disposition",
                           "attachment;  filename=bookcode.jar");
        [/B]
ServletContext ctx = getServletContext();
InputStream is = ctx.getResourceAsStream("/bookcode.jar");
int read = 0;
byte[] bytes = new byte[1024];
OutputStream os = response.getOutputStream();
while ((read = is.read(bytes)) != -1) {
os.write(bytes, 0, read);
}
os.flush();
os.close();
}
  

[ November 18, 2008: Message edited by: Amol Nayak ]

[Thirugnanam Saravanan]

Now it is working fine as per my expectation. Thank you so much for the reply.