138 lines
3.1 KiB
PHP
138 lines
3.1 KiB
PHP
<?php defined('SYSPATH') OR die('No direct access allowed.');
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/**
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* Download helper class.
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*
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* $Id: download.php 4679 2009-11-10 01:45:52Z isaiah $
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*
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* @package Core
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* @author Kohana Team
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* @copyright (c) 2007-2009 Kohana Team
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* @license http://kohanaphp.com/license
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*/
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class download_Core {
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/**
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* Send headers necessary to invoke a "Save As" dialog
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*
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* @link http://support.microsoft.com/kb/260519
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* @link http://greenbytes.de/tech/tc2231/
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*
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* @param string file name
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* @return string file name as it was sent
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*/
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public static function dialog($filename)
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{
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$filename = basename($filename);
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header('Content-Disposition: attachment; filename="'.$filename.'"');
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return $filename;
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}
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/**
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* Send the contents of a file or a data string with the proper MIME type and exit.
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*
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* @uses exit()
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* @uses Kohana::close_buffers()
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*
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* @param string a file path or file name
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* @param string optional data to send
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* @return void
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*/
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public static function send($filename, $data = NULL)
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{
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if ($data === NULL)
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{
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$filepath = realpath($filename);
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$filename = basename($filepath);
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$filesize = filesize($filepath);
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}
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else
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{
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$filename = basename($filename);
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$filesize = strlen($data);
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}
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// Retrieve MIME type by extension
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$mime = Kohana::config('mimes.'.strtolower(substr(strrchr($filename, '.'), 1)));
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$mime = empty($mime) ? 'application/octet-stream' : $mime[0];
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// Close output buffers
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Kohana::close_buffers(FALSE);
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// Clear any output
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Event::add('system.display', create_function('', 'Kohana::$output = "";'));
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// Send headers
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header("Content-Type: $mime");
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header('Content-Length: '.sprintf('%d', $filesize));
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header('Content-Transfer-Encoding: binary');
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// Send data
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if ($data === NULL)
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{
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$handle = fopen($filepath, 'rb');
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fpassthru($handle);
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fclose($handle);
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}
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else
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{
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echo $data;
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}
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exit;
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}
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/**
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* Force the download of a file by the user's browser by preventing any
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* caching. Contains a workaround for Internet Explorer.
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*
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* @link http://support.microsoft.com/kb/316431
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* @link http://support.microsoft.com/kb/812935
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*
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* @uses download::dialog()
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* @uses download::send()
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*
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* @param string a file path or file name
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* @param mixed data to be sent if the filename does not exist
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* @param string suggested filename to display in the download
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* @return void
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*/
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public static function force($filename = NULL, $data = NULL, $nicename = NULL)
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{
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download::dialog(empty($nicename) ? $filename : $nicename);
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// Prevent caching
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header('Expires: Thu, 01 Jan 1970 00:00:00 GMT');
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if (request::user_agent('browser') === 'Internet Explorer' AND request::user_agent('version') <= '6.0')
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{
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// HTTP 1.0
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header('Pragma:');
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// HTTP 1.1 with IE extensions
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header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
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}
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else
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{
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// HTTP 1.0
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header('Pragma: no-cache');
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// HTTP 1.1
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header('Cache-Control: no-cache, max-age=0');
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}
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if (is_file($filename))
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{
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download::send($filename);
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}
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else
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{
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download::send($filename, $data);
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}
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}
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} // End download
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