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| author | ewinslow <ewinslow@36083f99-b078-4883-b0ff-0f9b5a30f544> | 2010-09-06 02:42:09 +0000 |
|---|---|---|
| committer | ewinslow <ewinslow@36083f99-b078-4883-b0ff-0f9b5a30f544> | 2010-09-06 02:42:09 +0000 |
| commit | 76dac45ebaf104b312a8527a05424601ca9d520a (patch) | |
| tree | 7440558a893ebf1d3816829ecbb96c3b0df9b4f0 /engine/classes/ElggHMACCache.php | |
| parent | 9e8baf614938dfd1687ddce39b409c3c0e5c5753 (diff) | |
| download | elgg-76dac45ebaf104b312a8527a05424601ca9d520a.tar.gz elgg-76dac45ebaf104b312a8527a05424601ca9d520a.tar.bz2 | |
Refs #2220: Pulled most classes / interfaces out of lib files (except query.php and exception.php) into "classes" folder. Replaced inline classes with "require_once" statements for now. Ran unit tests to verify functionality before committing.
git-svn-id: http://code.elgg.org/elgg/trunk@6908 36083f99-b078-4883-b0ff-0f9b5a30f544
Diffstat (limited to 'engine/classes/ElggHMACCache.php')
| -rw-r--r-- | engine/classes/ElggHMACCache.php | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/engine/classes/ElggHMACCache.php b/engine/classes/ElggHMACCache.php new file mode 100644 index 000000000..8c50d7dfb --- /dev/null +++ b/engine/classes/ElggHMACCache.php @@ -0,0 +1,94 @@ +<?php
+/**
+ * ElggHMACCache
+ * Store cached data in a temporary database, only used by the HMAC stuff.
+ *
+ * @author Curverider Ltd <info@elgg.com>
+ * @package Elgg
+ * @subpackage API
+ */
+class ElggHMACCache extends ElggCache {
+ /**
+ * Set the Elgg cache.
+ *
+ * @param int $max_age Maximum age in seconds, 0 if no limit.
+ */
+ function __construct($max_age = 0) {
+ $this->set_variable("max_age", $max_age);
+ }
+
+ /**
+ * Save a key
+ *
+ * @param string $key
+ * @param string $data
+ * @return boolean
+ */
+ public function save($key, $data) {
+ global $CONFIG;
+
+ $key = sanitise_string($key);
+ $time = time();
+
+ return insert_data("INSERT into {$CONFIG->dbprefix}hmac_cache (hmac, ts) VALUES ('$key', '$time')");
+ }
+
+ /**
+ * Load a key
+ *
+ * @param string $key
+ * @param int $offset
+ * @param int $limit
+ * @return string
+ */
+ public function load($key, $offset = 0, $limit = null) {
+ global $CONFIG;
+
+ $key = sanitise_string($key);
+
+ $row = get_data_row("SELECT * from {$CONFIG->dbprefix}hmac_cache where hmac='$key'");
+ if ($row) {
+ return $row->hmac;
+ }
+
+ return false;
+ }
+
+ /**
+ * Invalidate a given key.
+ *
+ * @param string $key
+ * @return bool
+ */
+ public function delete($key) {
+ global $CONFIG;
+
+ $key = sanitise_string($key);
+
+ return delete_data("DELETE from {$CONFIG->dbprefix}hmac_cache where hmac='$key'");
+ }
+
+ /**
+ * Clear out all the contents of the cache.
+ *
+ * Not currently implemented in this cache type.
+ */
+ public function clear() {
+ return true;
+ }
+
+ /**
+ * Clean out old stuff.
+ *
+ */
+ public function __destruct() {
+ global $CONFIG;
+
+ $time = time();
+ $age = (int)$this->get_variable("max_age");
+
+ $expires = $time-$age;
+
+ delete_data("DELETE from {$CONFIG->dbprefix}hmac_cache where ts<$expires");
+ }
+}
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