diff options
Diffstat (limited to 'program/lib/Roundcube/rcube_cache.php')
| -rw-r--r-- | program/lib/Roundcube/rcube_cache.php | 78 |
1 files changed, 58 insertions, 20 deletions
diff --git a/program/lib/Roundcube/rcube_cache.php b/program/lib/Roundcube/rcube_cache.php index 92f12a8bf..a708cb292 100644 --- a/program/lib/Roundcube/rcube_cache.php +++ b/program/lib/Roundcube/rcube_cache.php @@ -38,6 +38,7 @@ class rcube_cache private $type; private $userid; private $prefix; + private $table; private $ttl; private $packed; private $index; @@ -71,8 +72,9 @@ class rcube_cache $this->db = function_exists('apc_exists'); // APC 3.1.4 required } else { - $this->type = 'db'; - $this->db = $rcube->get_dbh(); + $this->type = 'db'; + $this->db = $rcube->get_dbh(); + $this->table = $this->db->table_name('cache'); } // convert ttl string to seconds @@ -145,7 +147,7 @@ class rcube_cache */ function write($key, $data) { - return $this->write_record($key, $this->packed ? serialize($data) : $data); + return $this->write_record($key, $this->serialize($data)); } @@ -192,20 +194,31 @@ class rcube_cache */ function expunge() { - if ($this->type == 'db' && $this->db) { + if ($this->type == 'db' && $this->db && $this->ttl) { $this->db->query( - "DELETE FROM ".$this->db->table_name('cache'). + "DELETE FROM ".$this->table. " WHERE user_id = ?". " AND cache_key LIKE ?". - " AND " . $this->db->unixtimestamp('created')." < ?", + " AND expires < " . $this->db->now(), $this->userid, - $this->prefix.'.%', - time() - $this->ttl); + $this->prefix.'.%'); } } /** + * Remove expired records of all caches + */ + static function gc() + { + $rcube = rcube::get_instance(); + $db = $rcube->get_dbh(); + + $db->query("DELETE FROM " . $db->table_name('cache') . " WHERE expires < " . $db->now()); + } + + + /** * Writes the cache back to the DB. */ function close() @@ -219,7 +232,7 @@ class rcube_cache if ($this->cache_changes[$key]) { // Make sure we're not going to write unchanged data // by comparing current md5 sum with the sum calculated on DB read - $data = $this->packed ? serialize($data) : $data; + $data = $this->serialize($data); if (!$this->cache_sums[$key] || $this->cache_sums[$key] != md5($data)) { $this->write_record($key, $data); @@ -255,7 +268,7 @@ class rcube_cache if ($data) { $md5sum = md5($data); - $data = $this->packed ? unserialize($data) : $data; + $data = $this->unserialize($data); if ($nostore) { return $data; @@ -271,7 +284,7 @@ class rcube_cache else { $sql_result = $this->db->limitquery( "SELECT data, cache_key". - " FROM ".$this->db->table_name('cache'). + " FROM " . $this->table. " WHERE user_id = ?". " AND cache_key = ?". // for better performance we allow more records for one key @@ -283,7 +296,7 @@ class rcube_cache $key = substr($sql_arr['cache_key'], strlen($this->prefix)+1); $md5sum = $sql_arr['data'] ? md5($sql_arr['data']) : null; if ($sql_arr['data']) { - $data = $this->packed ? unserialize($sql_arr['data']) : $sql_arr['data']; + $data = $this->unserialize($sql_arr['data']); } if ($nostore) { @@ -326,7 +339,7 @@ class rcube_cache // Remove NULL rows (here we don't need to check if the record exist) if ($data == 'N;') { $this->db->query( - "DELETE FROM ".$this->db->table_name('cache'). + "DELETE FROM " . $this->table. " WHERE user_id = ?". " AND cache_key = ?", $this->userid, $key); @@ -337,8 +350,10 @@ class rcube_cache // update existing cache record if ($key_exists) { $result = $this->db->query( - "UPDATE ".$this->db->table_name('cache'). - " SET created = ". $this->db->now().", data = ?". + "UPDATE " . $this->table. + " SET created = " . $this->db->now(). + ", expires = " . ($this->ttl ? $this->db->now($this->ttl) : 'NULL'). + ", data = ?". " WHERE user_id = ?". " AND cache_key = ?", $data, $this->userid, $key); @@ -348,9 +363,9 @@ class rcube_cache // for better performance we allow more records for one key // so, no need to check if record exist (see rcube_cache::read_record()) $result = $this->db->query( - "INSERT INTO ".$this->db->table_name('cache'). - " (created, user_id, cache_key, data)". - " VALUES (".$this->db->now().", ?, ?, ?)", + "INSERT INTO " . $this->table. + " (created, expires, user_id, cache_key, data)". + " VALUES (" . $this->db->now() . ", " . ($this->ttl ? $this->db->now($this->ttl) : 'NULL') . ", ?, ?, ?)", $this->userid, $key, $data); } @@ -364,7 +379,6 @@ class rcube_cache * @param string $key Cache key name or pattern * @param boolean $prefix_mode Enable it to clear all keys starting * with prefix specified in $key - * */ private function remove_record($key=null, $prefix_mode=false) { @@ -412,7 +426,7 @@ class rcube_cache } $this->db->query( - "DELETE FROM ".$this->db->table_name('cache'). + "DELETE FROM " . $this->table. " WHERE user_id = ?" . $where, $this->userid); } @@ -553,4 +567,28 @@ class rcube_cache // This way each cache will have its own index return sprintf('%d:%s%s', $this->userid, $this->prefix, 'INDEX'); } + + /** + * Serializes data for storing + */ + private function serialize($data) + { + if ($this->type == 'db') { + return $this->db->encode($data, $this->packed); + } + + return $this->packed ? serialize($data) : $data; + } + + /** + * Unserializes serialized data + */ + private function unserialize($data) + { + if ($this->type == 'db') { + return $this->db->decode($data, $this->packed); + } + + return $this->packed ? @unserialize($data) : $data; + } } |