<?
require_once ("lib/element.inc.php");

if (!isset ($_REQUEST[Group::ID_REQUEST_NAME])) {
	header (true, true, 406);
	echo "missing value '".Group::ID_REQUEST_NAME."'";
	exit;
}
if (!isset ($_REQUEST['name'])) {
	header (true, true, 406);
	echo "missing value 'name'";
	exit;
}

session_cache_limiter ("public");
header ("Cache-control: public");

if (isset ($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
	header('Last-Modified: '.$_SERVER['HTTP_IF_MODIFIED_SINCE'], true, 304);
	exit;
}

$element = new Element (array ('group_id' => $_REQUEST[Group::ID_REQUEST_NAME], 'name' => $_REQUEST['name']));

if (!$element->existsBinary ()) {
	header (true, true, 404);
	echo "file not found '".$element->fileName ()."'";
	exit;
}

if (isset ($_REQUEST['filename']) && empty ($_REQUEST['open'])) {
	// force Download

	if (ini_get('zlib.output_compression')) {
		ini_set('zlib.output_compression', 'Off');
	}
	
	header ("Pragma: public");
	header ("Expires: 0");
	header ("Cache-Control: must-revalidate, post-check=0, pre-check=0"); 
	
	header ("Cache-Control: private");                                   // IE6 bug fix
	
	header('Last-Modified: '.gmdate ('D, d M Y H:i:s').' GMT', true, 200);
	
	$type = isset ($_REQUEST['type']) ? $_REQUEST['type'] : "";
	header ("Content-type: $type");
	
	if (strstr ($_SERVER['HTTP_USER_AGENT'], "mac")) {
		header ("Content-Type: application/x-macbinary");
	} else {
		header ("Content-Type: application/force-download");
	}
	
	if (strstr ($_SERVER['HTTP_USER_AGENT'], "msie") && strstr ($_SERVER['HTTP_USER_AGENT'], "win")) {
		header( "Content-Disposition: filename=\"{$_REQUEST['filename']}\"");
	} else {
		header( "Content-Disposition: attachment; filename=\"{$_REQUEST['filename']}\"");
	}
	
	header ("Content-Description: File Transfer");
	
	header ("Content-Length: " . $element->getBinarySize ());

} else {
	// direkte Ausgabe
	
	header ("Cache-control: public");
	header('Last-Modified: '.gmdate ('D, d M Y H:i:s').' GMT', true, 200);
	
	$type = isset ($_REQUEST['type']) ? $_REQUEST['type'] : "";
	header ("Content-type: $type");
	
	if (isset ($_REQUEST['filename'])) {
		if (strstr ($_SERVER['HTTP_USER_AGENT'], "msie") && strstr ($_SERVER['HTTP_USER_AGENT'], "win")) {
			header( "Content-Disposition: filename=\"{$_REQUEST['filename']}\"");
		} else {
			header( "Content-Disposition: attachment; filename=\"{$_REQUEST['filename']}\"");
		}
	}
}

echo $element->getBinary ();
?>