diff options
Diffstat (limited to 'kohana/helpers/expires.php')
| -rw-r--r-- | kohana/helpers/expires.php | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/kohana/helpers/expires.php b/kohana/helpers/expires.php deleted file mode 100644 index c43cc0cc..00000000 --- a/kohana/helpers/expires.php +++ /dev/null @@ -1,111 +0,0 @@ -<?php defined('SYSPATH') OR die('No direct access allowed.'); -/** - * Controls headers that effect client caching of pages - * - * $Id: expires.php 4272 2009-04-25 21:47:26Z zombor $ - * - * @package Core - * @author Kohana Team - * @copyright (c) 2007-2008 Kohana Team - * @license http://kohanaphp.com/license.html - */ -class expires_Core { - - /** - * Sets the amount of time before a page expires - * - * @param integer Seconds before the page expires - * @return boolean - */ - public static function set($seconds = 60) - { - if (expires::check_headers()) - { - $now = $expires = time(); - - // Set the expiration timestamp - $expires += $seconds; - - // Send headers - header('Last-Modified: '.gmdate('D, d M Y H:i:s T', $now)); - header('Expires: '.gmdate('D, d M Y H:i:s T', $expires)); - header('Cache-Control: max-age='.$seconds); - - return $expires; - } - - return FALSE; - } - - /** - * Checks to see if a page should be updated or send Not Modified status - * - * @param integer Seconds added to the modified time received to calculate what should be sent - * @return bool FALSE when the request needs to be updated - */ - public static function check($seconds = 60) - { - if ( ! empty($_SERVER['HTTP_IF_MODIFIED_SINCE']) AND expires::check_headers()) - { - if (($strpos = strpos($_SERVER['HTTP_IF_MODIFIED_SINCE'], ';')) !== FALSE) - { - // IE6 and perhaps other IE versions send length too, compensate here - $mod_time = substr($_SERVER['HTTP_IF_MODIFIED_SINCE'], 0, $strpos); - } - else - { - $mod_time = $_SERVER['HTTP_IF_MODIFIED_SINCE']; - } - - $mod_time = strtotime($mod_time); - $mod_time_diff = $mod_time + $seconds - time(); - - if ($mod_time_diff > 0) - { - // Re-send headers - header('Last-Modified: '.gmdate('D, d M Y H:i:s T', $mod_time)); - header('Expires: '.gmdate('D, d M Y H:i:s T', time() + $mod_time_diff)); - header('Cache-Control: max-age='.$mod_time_diff); - header('Status: 304 Not Modified', TRUE, 304); - - // Prevent any output - Event::add('system.display', array('expires', 'prevent_output')); - - // Exit to prevent other output - exit; - } - } - - return FALSE; - } - - /** - * Check headers already created to not step on download or Img_lib's feet - * - * @return boolean - */ - public static function check_headers() - { - foreach (headers_list() as $header) - { - if ((session_cache_limiter() == '' AND stripos($header, 'Last-Modified:') === 0) - OR stripos($header, 'Expires:') === 0) - { - return FALSE; - } - } - - return TRUE; - } - - /** - * Prevent any output from being displayed. Executed during system.display. - * - * @return void - */ - public static function prevent_output() - { - Kohana::$output = ''; - } - -} // End expires
\ No newline at end of file |