Commit e39771330fe23f73012d528e2ef7de8f6424357c

Authored by Georg Hopp
1 parent e2b88415

cache eingebaut

@@ -3,10 +3,25 @@ @@ -3,10 +3,25 @@
3 require_once dirname(__FILE__) . '/../config.php'; 3 require_once dirname(__FILE__) . '/../config.php';
4 require_once LIBDIR . 'initLocale.php'; 4 require_once LIBDIR . 'initLocale.php';
5 require_once LIBDIR . 'c_personAdmin.php'; 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 $personAdmin = new c_personAdmin ($locale); 9 $personAdmin = new c_personAdmin ($locale);
8 10
9 ob_start ('ob_gzhandler'); 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 ?>
  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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