File Download Problem

[imangh]

hello

I have a problem with a page that let users to download file. It work correctly from IE but not in FF!

file in FF is 25 byte lest than file downloaded by IE in length.

 

if(isset($_SERVER['HTTP_USER_AGENT']) && preg_match("/MSIE/", $_SERVER['HTTP_USER_AGENT']))

{

ob_end_clean();

}

if(!file_exists(FilesDirectory.$FileName))

{

echo "Invalide request!";

exit();

}

header('Expires: ' . gmdate('D, d M Y H:i:s') . ' GMT');

header("Content-type: application/zip");

header("Content-Disposition: attachment; filename=\"".md5($FileName).".zip\"");

 

if ('IE') {

header('Cache-Control: must-revalidate, post-check=0, pre-check=0');

header('Pragma: public');

} else {

header('Pragma: no-cache');

}

 

header('Cache-Control: max-age=604800');

 

header("Content-Length: ".@filesize(FilesDirectory.$FileName));

 

readfile(RootDirectory."files/".$FileName);

 

in configuration file I used ob_start("ob_gzhandler") I try to solve problem by placing ob_end_clean(), some time IE have error and some time FF.

I don't know what to do exactly!