HTTP Headers: filetype for download

[bgoldnyxnet]

I have a PHP script that allows downloading a binary file. I have (I think) set the headers to determine the filetype, but the browser always claims that it is a "Hypertext Document". This happens in three different browsers: Firefox 1.0.4, Mozilla 1.7.12, Internet Explorer 6.0.

The download box (from Firefox) reads:

You have chosen to open
(icon) sample.doc
which is a: Hypertext Document
from: [url]http://(myhost[/url])
What should Firefox do with this file?

"Save to Disk" is checked by default.

My code is pasted below:

header("Content-Disposition: attachment; filename=sample.doc");
header("Content-Length: $fsize");
readfile($targ);
exit(0);

This happens in both PHP 4.3.10 (on my development system) and PHP 5.0.3 (the production system).

[gardnc]

These are the headers we use for our downloads:

// get file size of dowload file
$file_size = strlen($file_data);

header("Pragma: public");
header("Expires: 0");
header('Last-Modified: '.gmdate('D, d M Y H:i:s') . ' GMT');

// different variations of Cache-Control header
//header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Cache-Control: no-store, no-cache, must-revalidate"); // HTTP/1.1
header("Cache-Control: pre-check=0, post-check=0, max-age=0"); // HTTP/1.1
header("Cache-Control: private", false);

// different variations of Content-Type header
//header("Content-Type: application/octet-stream");
header("Content-Type: application/force-download");
header("Content-Type: application/octetstream; name=\"".$display_name."\""); //This should work for IE & Opera
header("Content-Type: application/octet-stream; name=\"".$display_name."\""); //This should work for the rest

// different variations of Content-Disposition header

header("Content-Disposition: attachment; filename=\"".$display_name."\";");
//header("Content-Disposition: inline; filename=\"".$display_name."\"");

// different variations of Content-Transfer-Encoding header

header("Content-Transfer-Encoding: none");
//header("Content-Transfer-Encoding: binary");

header("Content-Length: ".$file_size);

[bgoldnyxnet]

Well, that produced some progress.

IE now handles it correctly, reporting:
Name: sample.doc
Type: Microsoft Word Document, (size)
From: (host)

Mozilla says:
The site has suggested that "sample.doc" be handled as an attachment. It is of type text/html (Microsoft Word Document) and located at:
(host)
What should Mozilla do with this file?

But Firefox still thinks it's a "Hypertext Document".

I may have to live with this. Or maybe I'll do the final download phase using a JSP and see if that makes a difference.