'file_mimes' => array(
            //图片
            'png' => 'image/png',
            'jpg' => 'image/jpeg',
            'gif' => 'image/gif',
            'bmp' => 'image/bmp',
            'psd' => 'application/octet-stream',
            'ico' => 'image/x-ico',
            //压缩文件
            'rar' => 'application/octet-stream',
            'zip' => 'application/zip',
            '7z'  => 'application/octet-stream',
            //执行文件
            'exe' => 'application/octet-stream',
            //媒体文件
            'avi' => 'video/avi',
            'rmvb'=> 'application/vnd.rn-realmedia-vbr',
            '3gp' => 'application/octet-stream',
            'flv' => 'application/octet-stream',
            'mp3' => 'audio/mpeg',
            'wav' => 'audio/wav',
            //歌词
            'krc' => 'application/octet-stream',
            'lrc' => 'application/octet-stream',
            //文本文档
            'txt' => 'text/plain',
            'doc' => 'application/msword',
            'xls' => 'application/vnd.ms-excel',
            'ppt' => 'application/vnd.ms-powerpoint',
            'pdf' => 'application/pdf',
            'chm' => 'application/octet-stream',
            'mdb' => 'application/msaccess',
            'sql' => 'application/octet-stream',

            'con' => 'application/octet-stream',
            'log' => 'text/plain',
            'dat' => 'application/octet-stream',
            'ini' => 'application/octet-stream',

            'php' => 'application/octet-stream',
            'html'=> 'text/html',
            'htm' => 'text/html',

            'ttf' => 'application/octet-stream',
            'fon' => 'application/octet-stream',

            'js'  => 'application/x-javascript',
            'xml' => 'text/xml',
            'css' => 'text/css',

            'dll' => 'application/octet-stream',
        )