/**
* @static
* @param int $cachehost
* @param int $cacheport
* @param string $cacheType
* @param string $cacheSys
* @return db_Cache
*/
public static function instance($cachehost = 0, $cacheport = 0, $cacheType = 'memcached', $cacheSys = '')
{
if (self::$self == NULL) {
self::$self = new db_Cache($cacheSys, $cacheType, $cachehost, $cacheport);
}
return self::$self;
}
/**
* 主要check流程
* @param string $key
*/
public function check($key = NULL)
{
self::getkey($key);
$ready = $this->cache->get($this->key);
if ($ready == FALSE) {
$this->cache->set($this->key, array(time()));
return;
}
$ready_ = $ready;
if (self::checkCountAndTime($ready_)) {
$this->rest->error(rest_Code::STATUS_ERROR_API_QUENCY_M);
}
unset($ready_);
array_push($ready, time());
$this->cache->set($this->key, $ready);
}
/**
* 主要检测过程
* @param int $time
*/
public function ckModified($time = self::DEFAULT_MODIFIED_TIME)
{
if (!$this->ifConfig) {
self::config($time);
}
$method = $_SERVER['REQUEST_METHOD'];
switch ($method) {
case 'GET':
$uri = $_SERVER['REQUEST_URI'];
$params = 0;
break;
case 'POST':
$uri = $_SERVER['REQUEST_URI'];
$params = $_POST;
break;
}
$key = self::setModifiedKey($uri, $params);
$cache_time = $this->cache->get($key);
if ($cache_time) {
if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
$modified_time = strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']);
if ($cache_time <= $modified_time) {
self::mkHeader($cache_time);
header("HTTP/1.0 304 Not Modified");
die;
}
}
} else {
$now = time();
$this->cache->set($key, $now, $this->modified_time);
}
self::mkHeader($now);
}
private function __construct($dbhost, $dbport, $username, $password, $dbname, $dbcharset, $cachesys, $cachetype, $cachehost, $cacheport)
{
try {
$this->_dbh = new PDO('mysql:host=' . $dbhost . ';port=' . $dbport . ';dbname=' . $dbname, $username, $password);
$this->_dbh->query('SET NAMES ' . $dbcharset);
} catch (PDOException $e) {
exit('<pre><b>Connection failed:</b> ' . $e->getMessage());
}
$this->_cache = db_Cache::instance($cachehost, $cacheport, $cachetype, $cachesys);
if (!$this->_cache) {
}
}