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134 additions
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1 deletions
... | ... | @@ -3,10 +3,25 @@ |
3 | 3 | require_once dirname(__FILE__) . '/../config.php'; |
4 | 4 | require_once LIBDIR . 'initLocale.php'; |
5 | 5 | require_once LIBDIR . 'c_personAdmin.php'; |
6 | +require_once LIBDIR . 'c_cache.php'; | |
6 | 7 | |
8 | +$cache = new c_cache (array ('a', 'b')); | |
7 | 9 | $personAdmin = new c_personAdmin ($locale); |
8 | 10 | |
9 | 11 | ob_start ('ob_gzhandler'); |
10 | -$personAdmin->show (); | |
12 | + | |
13 | +if (! $cache->check (60)) | |
14 | +{ | |
15 | + sleep (10); | |
16 | + $personAdmin->show (); | |
17 | + | |
18 | + $cache->update (); | |
19 | +} | |
20 | +else | |
21 | +{ | |
22 | + print "<p>[kein update]<p>"; | |
23 | +} | |
24 | + | |
25 | +ob_flush (); | |
11 | 26 | |
12 | 27 | ?> | ... | ... |
libs/c_cache.php
0 → 100644
1 | +<?php | |
2 | + | |
3 | +require_once LIBDIR . 'mutualExclusion.php'; | |
4 | + | |
5 | +class c_cache | |
6 | +{ | |
7 | + private $lock; | |
8 | + private $cacheFile; | |
9 | + | |
10 | + // generiere den Cache Filename aus dem | |
11 | + // 1. script Namen | |
12 | + // 2. einem Hash ueber alle verwendeten: | |
13 | + // - request parameter | |
14 | + // - Werte in GLOBALS | |
15 | + // - Sessionvariablen | |
16 | + // ausserdem wird das cache Verzeichnis auch gleich angelegt wenn es noch | |
17 | + // nicht existiert. | |
18 | + function __construct ($params=NULL, $globals=NULL, $session=NULL) | |
19 | + { | |
20 | + $cacheDir = CACHEDIR . substr ($_SERVER['PHP_SELF'], 1); | |
21 | + $cacheDirArr = explode ('/', $cacheDir); | |
22 | + $cacheParms = array (); | |
23 | + $cacheGlobals = array (); | |
24 | + $cacheSession = array (); | |
25 | + $cachaAllParm = array (); | |
26 | + $parmStr = ''; | |
27 | + | |
28 | + // cache Verzeichnis anlegen. | |
29 | + $_dir = ''; | |
30 | + foreach ($cacheDirArr as $dir) | |
31 | + if (! is_dir ($_dir .= '/' . $dir) && $_dir !== '') | |
32 | + mkdir ($_dir, 0755); | |
33 | + | |
34 | + unset ($_dir, $dir, $cacheDirArr); | |
35 | + | |
36 | + // alle verwendeten req parameter holen | |
37 | + if ($params !== NULL) | |
38 | + foreach ($params as $parm) | |
39 | + if (isset ($_REQUEST[$parm])) | |
40 | + $cacheParms[$parm] = $_REQUEST[$parm]; | |
41 | + else | |
42 | + $cacheParms[$parm] = ''; | |
43 | + ksort ($cacheParms); | |
44 | + | |
45 | + // alle verwendeten globals holen | |
46 | + if ($globals !== NULL) | |
47 | + foreach ($globals as $glob) | |
48 | + if (isset ($GLOBALS[$glob])) | |
49 | + $cacheGlobals[$glob] = $GLOBALS[$glob]; | |
50 | + else | |
51 | + $cacheGlobals[$glob] = ''; | |
52 | + ksort ($cacheGlobals); | |
53 | + | |
54 | + // alle verwendeten session variablen holen | |
55 | + if ($session !== NULL) | |
56 | + foreach ($session as $sess) | |
57 | + if (isset ($SESSION[$sess])) | |
58 | + $cacheSession[$sess] = $SESSION[$sess]; | |
59 | + else | |
60 | + $cacheSession[$sess] = ''; | |
61 | + ksort ($cacheSession); | |
62 | + | |
63 | + // und nu aus all denen einen md5 hash generieren. | |
64 | + $cacheAllParm = array_merge ($cacheParms, $cacheGlobals, $cacheSession); | |
65 | + | |
66 | + unset ($cacheParms, $cacheGlobals, $cacheSession); | |
67 | + | |
68 | + foreach ($cacheAllParm as $name => $value) | |
69 | + $parmStr .= '_' . $name . '=' . $value; | |
70 | + | |
71 | + $parmStr = md5 ($parmStr); | |
72 | + | |
73 | + $this->lock = NULL; | |
74 | + $this->cacheFile = $cacheDir . '/cache_' . $parmStr . '.html'; | |
75 | + } | |
76 | + | |
77 | + | |
78 | + | |
79 | + function check ($interval=0) | |
80 | + { | |
81 | + ob_start (); | |
82 | + | |
83 | + clearstatcache (); | |
84 | + if (file_exists ($this->cacheFile) && | |
85 | + time () - filemtime ($this->cacheFile) < $interval) | |
86 | + { | |
87 | + readfile ($this->cacheFile); | |
88 | + return TRUE; | |
89 | + } | |
90 | + else | |
91 | + { | |
92 | + $this->lock = acquireLock ($this->cacheFile, '1'); | |
93 | + | |
94 | + // inszwischen koennte der cache von einem anderen aufruf | |
95 | + // aktualisiert worden sein, also nochmal checken. | |
96 | + clearstatcache (); | |
97 | + if (file_exists ($this->cacheFile) && | |
98 | + time () - filemtime ($this->cacheFile) < $interval) | |
99 | + { | |
100 | + releaseLock ($this->lock); | |
101 | + readfile ($this->cacheFile); | |
102 | + return TRUE; | |
103 | + } | |
104 | + | |
105 | + return FALSE; | |
106 | + } | |
107 | + } | |
108 | + | |
109 | + function update () | |
110 | + { | |
111 | + $page = ob_get_flush (); | |
112 | + file_put_contents ($this->cacheFile, $page); | |
113 | + | |
114 | + releaseLock ($this->lock); | |
115 | + } | |
116 | +}; | |
117 | + | |
118 | +?> | ... | ... |
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