Downloading a file using JSF - jsf

Question

Hi I am trying to download a file from server but at the end of my process I end up with only numbers and some weird characters on my browser. It's not downloading the file. I am using seam and JSF 1.2.
Here is my code:
public void writeBytesToResponse(UploadDefinition _instance, String path) {
FacesContext context = FacesContext.getCurrentInstance();
HttpServletResponse response = (HttpServletResponse) context .getExternalContext().getResponse();
try {
byte[] bytes = getFile(path);
response.reset();
response.setContentType(ContentType.PDF.getLabel());
response.setContentLength(bytes.length);
response.setHeader("Content-disposition", "attachment; filename=\"" + _instance.getFileName() + "\"");
OutputStream outputStream = response.getOutputStream();
outputStream.write(bytes);
outputStream.flush();
outputStream.close();
context.responseComplete();
} catch (Exception ex) {
ex.printStackTrace();
}
}
#SuppressWarnings("resource")
public byte[] getFile(String filePath) throws FileNotFoundException, IOException {
File file = new File(filePath);
InputStream is = new FileInputStream(file);
long length = file.length();
if (length > Integer.MAX_VALUE) {
throw new IOException("File is too large " + file.getName());
}
byte[] bytes = new byte[(int) length];
int offset = 0;
int numRead = 0;
while (offset < bytes.length && (numRead = is.read(bytes, offset, bytes.length - offset)) >= 0) {
offset += numRead;
}
if (offset < bytes.length) {
throw new IOException("Could not completely read file " + file.getName());
}
is.close();
return bytes;
}
Here I call the method:
public void downloadFile() {
writeBytesToResponse(ud, path);
}

Answer 1

I got the answer, I was using <a4j:commandButton> on jsf and I changed it to <h:commandButton> then it worked. The point is not to use ajax.