/**
* 初始化
* @return void
*/
public function __construct($buffer = null)
{
if ($buffer) {
$data = self::decode($buffer);
$this->body = $data['body'];
unset($data['body']);
$this->header = $data;
} else {
if (self::$seriesId >= 65535) {
self::$seriesId = 0;
} else {
$this->header['series_id'] = self::$seriesId++;
}
}
}
