$filePath 文件路径
* @param $mimeType 文件类型
* @param $range 请求区域(范围)
*/
function __construct($filePath, $mimeType = null , $range = null) {
$this->filePath = $filePath;
$this->fileSize = sprintf('%u',filesize($filePath));
$this->mimeType = ($mimeType != null)?$mimeType:"application/octet-stream"; // bin
$this->range = trim($range);
}
/**
* 获取文件区域
* @return