cron.php
author Dan
Sun, 07 Feb 2010 17:07:42 -0500
changeset 1219 2b13cd6b4f95
parent 1081 745200a9cc2a
child 1227 bdac73ed481e
permissions -rw-r--r--
URL sanitizer: disabled uppercase letters in URL hex character codes (it was causing conflicts with the Windows/Apache 2.2 alt namespace separator). Thanks Techokami for finding and reporting this bug.
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<?php
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/*
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 * Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between
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 * Copyright (C) 2006-2009 Dan Fuhry
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 *
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 * This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License
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 * as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
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 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
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 */
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//
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// cron.php - Maintenance tasks that should be run periodically
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//
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// The cron script is triggered by way of an image. This is a 1x1px transparent GIF.
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define('ENANO_GIF_SPACER', base64_decode('R0lGODlhAQABAIAAAP///////yH+FUNyZWF0ZWQgd2l0aCBUaGUgR0lNUAAh+QQBCgABACwAAAAAAQABAAACAkwBADs='));
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// Don't need a page to load, all we should need is the Enano API
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require('includes/common.php');
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global $db, $session, $paths, $template, $plugins; // Common objects
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// Hope now that plugins are loaded :-)
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global $cron_tasks;
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foreach ( $cron_tasks as $interval => $tasks )
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{
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  $interval = doubleval($interval);
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  $last_run = intval(getConfig("cron_lastrun_ivl_$interval"));
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  $last_run_threshold = doubleval(time()) - ( 3600.0 * $interval );
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  if ( $last_run_threshold >= $last_run )
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  {
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    foreach ( $tasks as $task )
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    {
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      call_user_func($task);
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    }
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    setConfig("cron_lastrun_ivl_$interval", strval(time()));
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  }
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}
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$expiry_date = date('r', get_cron_next_run());
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$etag = sha1($expiry_date);
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if ( isset($_SERVER['HTTP_IF_NONE_MATCH']) )
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{
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  if ( "\"$etag\"" == $_SERVER['HTTP_IF_NONE_MATCH'] )
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  {
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    header('HTTP/1.1 304 Not Modified');
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    exit();
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  }
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}
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header("ETag: $etag");
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header('Expires: ' . $expiry_date);
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header('Content-type: image/gif');
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echo ENANO_GIF_SPACER;
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?>