File Download - 403 problem

Question

Hi Folks,
From long time away from here, I am back.
In my application we are using only ADF Faces. There is a functionality in my application to download some files that have been previously uploaded by any user.
The problem is that the file is not written in a file system. It is inside database.
When the user clicks the download button from an af:table, it starts a method from a backing bean that goes to the database and gets the binary code from there.
It writes the binary array in the response output but since the download has not started by the user the IE 7 and 8 shows the information bar stating that Internet Explorer has blocked this site from download...
I have read that it is a default behaviour from IE7 and 8 when the user does not click in a link directly pointed to a file in a server.
I tried to put the site in Trusted Sites.
The only solution that I found was to enable "Always prompt for downloading". It works but I cannot use this solution since the application is going to run in a big Brazil TV Channel company throughout the country and change it is very difficult.
I so that the difference between the REQUEST HEADERS is the Transfering-Enconding chunked, but it is related to content-lenght, when it is not specified. I tried to specify content-lenght and it did not work.
When I click the bar and choose download file option, it redirects to the same page that I was, changing the afrSOMETHINGMode from 0 to 2 and adding the afrWindow to null.
It gets me a 302, another two other GETs are done witouht success to the context root and at the last one I get the 403.
Does any body have any light?
Thanks in advance.

Answer 1

Hi Mr. Puthanampatti,
I used your above code for a download button.
When I click the button the window will arise and we can download the file.
But after that the button will not become enable.
Normally when the task is over the button will automatically enabled. Butt here it is not happening and we can click the button only one time without refreshing the page.
(I assumed you have used res for HttpServletResponse)
the code I had used is mentioned below. Please tell me what can I do...??
FacesContext facesContext = FacesContext.getCurrentInstance();
ExternalContext externalContext = facesContext.getExternalContext();
HttpServletResponse response = (HttpServletResponse)externalContext.getResponse();
File file = new File(dir1, pdffile1);
BufferedInputStream input = null;
BufferedOutputStream output = null;
try {
input = new BufferedInputStream(new FileInputStream(file), DEFAULT_BUFFER_SIZE);
response.reset();
response.setContentType("application/pdf");
response.setContentLength((int)file.length());
response.setHeader("Content-disposition", "inline; filename=\"" + pdffile1 + "\"");
output = new BufferedOutputStream(response.getOutputStream(), 10240);
byte[] buffer = new byte[10240];
int length;
while ((length = input.read(buffer)) > 0) {
output.write(buffer, 0, length);
output.flush();
} finally {
close(output);
close(input);
facesContext.responseComplete();Thanks a lot.
Dinuka.