<?php
/* //分享地址支持下载（a=down)，预览(a=view)和流
 * @copyright   Leyun internet Technology(Shanghai)Co.,Ltd
 * @license     http://www.dzzoffice.com/licenses/license.txt
 * @package     DzzOffice
 * @link        http://www.dzzoffice.com
 * @author      zyx(zyx@dzz.cc)
 */

define('APPTYPEID', 200);
define('DZZSCRIPT', 'index.php');
define('CURSCRIPT', 'dzz');
require './core/coreBase.php';
$dzz = C::app();
$dzz->init();
$s = trim($_GET['s'] ?? '');
if (!$path = dzzdecode($s)) {
    exit('Access Denied');
}
if (isset($_GET['sid'])) {
    $sid = dzzdecode(trim($_GET['sid']));
}
if ($_GET['a'] == 'down') {
    IO::download($path, $_GET['filename']);
    exit();
} elseif ($_GET['a'] == 'view') {
    $vid = isset($_GET['vid']) ? intval($_GET['vid']) : 0;
    if ($vid) {
        if (!$icoarr = C::t('resources_version')->fetch_version_by_rid_vid($path, $vid)) {
            showmessage(lang('attachment_nonexistence'));
        } else {
            $path = dzzdecode($icoarr['icoid']);
        }
    } else {
        if (!$icoarr = IO::getMeta($path)) {
            showmessage(lang('attachment_nonexistence'));
        }
        $icoarr['icoid'] = $_GET['s'];
    }
    if ($icoarr['type'] == 'link') {
        @header('Location: ' . $icoarr['url']);
        exit();
    }
    $imageexts = array('jpg', 'jpeg', 'png', 'gif'); //图片使用；
    $filename = $icoarr['name'];//rtrim($_GET['n'],'.dzz');
    $ext = $icoarr['ext'];//strtolower(substr(strrchr($filename, '.'), 1, 10));
    if (!$ext) $ext = preg_replace("/\?.+/i", '', strtolower(substr(strrchr(rtrim($url, '.dzz'), '.'), 1, 10)));
    if (in_array($ext, $imageexts)) {
        $url = $_G['siteurl'] . 'index.php?mod=io&op=thumbnail&original=1&path=' . $icoarr['icoid'];
        @header("Location: $url");
        exit();
    }
    $extall = C::t('app_open')->fetch_all_ext();
    $exts = array();
    $bzarr = explode(':', $icoarr['rbz'] ? $icoarr['rbz'] : $icoarr['bz']);
    $bz = ($bzarr[0]) ? $bzarr[0] : 'dzz';
    foreach ($extall as $value) {
        if (!isset($exts[$value['ext']]) || $value['isdefault']) $exts[$value['ext']] = $value;
    }

    if (isset($exts[$bz . ':' . $ext])) {
        $data = $exts[$bz . ':' . $ext];
    } elseif ($exts[$ext]) {
        $data = $exts[$ext];
    } elseif ($exts[$icoarr['type']]) {
        $data = $exts[$icoarr['type']];
    } else $data = array();
    if ($data) {
        $url = $data['url'];
        if (strpos($url, 'dzzjs:') !== false) {//dzzjs形式时
            @header("Location: $icoarr[url]");
            exit();
        } else {
            //替换参数
            $url = preg_replace_callback("/{(\w+)}/i", function ($matches) use ($icoarr) {
                $key = $matches[1];
                if ($key == 'path') {
                    return $icoarr['icoid'];
                } else if ($key == 'icoid') {
                    return 'preview_' . random(5);
                } else {
                    return urlencode($icoarr[$key]);
                }
            }, $url);
            //添加path参数；
            if (strpos($url, '?') !== false && strpos($url, 'path=') === false) {
                if ($sid) {
                    $pre .= 'sid:' . $sid . '_';
                } else {
                    $pre = 'preview_';
                }
                $url .= '&path=' . dzzencode($pre . $path);
            }
            $url = $_G['siteurl'] . $url;
            @header("Location: $url");
            exit();
        }

    } else {//没有可用的打开方式，转入下载；
        IO::download($path);
        exit();
    }

}
//获取文件流地址
if (!$url = (IO::getStream($path))) {
    exit(lang('failed_get_file'));
}
if (is_array($url)) exit($url['error']);

//如果是阻止运行的后缀名时，直接调用;
if ($ext && in_array($ext, $_G['setting']['unRunExts'])) {
    $mime = 'text/plain';
} else {
    $mime = dzz_mime::get_type($ext);
}
@set_time_limit(0);
@header('Content-Type: ' . $mime);
@ob_end_clean();
@readfile($url);
@flush();
@ob_flush();
exit();