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comparison CacheTimeCheck.inc.php @ 134:b6b4a58c7625

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Using .inc.php rather than just .inc for include files.
author Tom Fredrik Blenning <bfg@bfgconsult.no>
date Sun, 22 Jan 2023 19:22:00 +0100
parents CacheTimeCheck.inc@df158368051e
children
comparison
equal deleted inserted replaced
133:00255ca89459 134:b6b4a58c7625
1 <?php
2 $baseDir = dirname(__FILE__);
3
4 include_once 'common-functions.inc.php';
5 include_once 'FileCacheSet.inc.php';
6 $cache = ScriptIncludeCache::instance(__FILE__);
7 $cache->cache_time("${baseDir}/FileCacheSet.inc.php");
8
9 function toGMTime($time) {
10 return gmdate('D, d M Y H:i:s', $time) . ' GMT';
11 }
12
13 /**
14 * Checks if a HTTP_IF_MODIFIED_SINCE header is set, if this file is
15 * newer, set a Last-Modified header, otherwise abort with an 304
16 * status code
17 */
18 function CheckHttpModified($cache)
19 {
20 if (DEBUG_LEVEL >= VERBOSITY_DEBUG)
21 var_dump($_SERVER);
22
23 $gmdate_mod = toGMTime($cache->getNewest());
24
25 if (array_key_exists('REDIRECT_URL', $_SERVER) && $_SERVER['REDIRECT_URL'] == '/sitemap.xml') {
26 //print_r($gmdate_mod);
27 }
28
29 foreach($cache->cacheControl() as $header => $value) {
30 header ("${header}: ${value}");
31 }
32 if(array_key_exists('HTTP_IF_MODIFIED_SINCE', $_SERVER)) {
33 $HTTP_IF_MODIFIED_SINCE = $_SERVER['HTTP_IF_MODIFIED_SINCE'];
34 $if_modified_since = preg_replace('/;.*$/', '', $HTTP_IF_MODIFIED_SINCE);
35
36 if (strtotime($if_modified_since) >= $cache->getNewest()) {
37 header("HTTP/1.0 304 Not Modified");
38 return false;
39 }
40 }
41
42 foreach($cache->cacheControl() as $header => $value) {
43 header ("${header}: ${value}");
44 }
45 header("Last-Modified: $gmdate_mod");
46 return true;
47 }
48
49
50
51 /**
52 * CacheTimeCheck provides a set of functions to enable generating a
53 * correct time for the latest update for a given file.
54 *
55 * @author Tom Fredrik Blenning Klaussen
56 */
57 class CacheTimeCheck extends FileCacheSet
58 {
59 function __construct($filename = False)
60 {
61 parent::__construct();
62 if ($filename)
63 $this->cache_time($filename);
64 $this->cache_time(__FILE__);
65 $this->max_age=0;
66 }
67
68 public function addParent($cache)
69 {
70 parent::addParent($cache);
71 }
72
73 /**
74 * Convenience function to load a file, and add it to the cacheset
75 *
76 * @param $path path of the file
77 * @return the contents of the file
78 */
79 function loadFile($path)
80 {
81 $this->cache_time($path);
82 return loadFile($path);
83 }
84
85 }
86 ?>