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<?php defined('SYSPATH') OR die('No direct access allowed.');
/**
* Download helper class.
*
* $Id$
*
* @package Core
* @author Kohana Team
* @copyright (c) 2007-2008 Kohana Team
* @license http://kohanaphp.com/license.html
*/
class download_Core {
/**
* Force a download of a file to the user's browser. This function is
* binary-safe and will work with any MIME type that Kohana is aware of.
*
* @param string a file path or file name
* @param mixed data to be sent if the filename does not exist
* @param string suggested filename to display in the download
* @return void
*/
public static function force($filename = NULL, $data = NULL, $nicename = NULL)
{
if (empty($filename))
return FALSE;
if (is_file($filename))
{
// Get the real path
$filepath = str_replace('\\', '/', realpath($filename));
// Set filesize
$filesize = filesize($filepath);
// Get filename
$filename = substr(strrchr('/'.$filepath, '/'), 1);
// Get extension
$extension = strtolower(substr(strrchr($filepath, '.'), 1));
}
else
{
// Get filesize
$filesize = strlen($data);
// Make sure the filename does not have directory info
$filename = substr(strrchr('/'.$filename, '/'), 1);
// Get extension
$extension = strtolower(substr(strrchr($filename, '.'), 1));
}
// Get the mime type of the file
$mime = Kohana::config('mimes.'.$extension);
if (empty($mime))
{
// Set a default mime if none was found
$mime = array('application/octet-stream');
}
// Generate the server headers
header('Content-Type: '.$mime[0]);
header('Content-Disposition: attachment; filename="'.(empty($nicename) ? $filename : $nicename).'"');
header('Content-Transfer-Encoding: binary');
header('Content-Length: '.sprintf('%d', $filesize));
// More caching prevention
header('Expires: 0');
if (Kohana::user_agent('browser') === 'Internet Explorer')
{
// Send IE headers
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
}
else
{
// Send normal headers
header('Pragma: no-cache');
}
// Clear the output buffer
Kohana::close_buffers(FALSE);
if (isset($filepath))
{
// Open the file
$handle = fopen($filepath, 'rb');
// Send the file data
fpassthru($handle);
// Close the file
fclose($handle);
}
else
{
// Send the file data
echo $data;
}
}
} // End download
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