zc100/application/api/controller/Diyajax.php

<?php
/**
 * 易优CMS
 * ============================================================================
 * 版权所有 2016-2028 海南赞赞网络科技有限公司，并保留所有权利。
 * 网站地址: http://www.eyoucms.com
 * ----------------------------------------------------------------------------
 * 如果商业用途务必到官方购买正版授权, 以免引起不必要的法律纠纷.
 * ============================================================================
 * Author: 小虎哥 <1105415366@qq.com>
 * Date: 2018-4-3
 */

namespace app\api\controller;

use think\Db;

class Diyajax extends Base
{
    /*
     * 初始化操作
     */
    public function _initialize() {
        parent::_initialize();
    }

    /**
     * 检验会员登录
     */
    public function check_userinfo()
    {
        if (IS_AJAX) {
            \think\Session::pause(); // 暂停session，防止session阻塞机制
            $ajaxLogic = new \app\api\logic\AjaxLogic;
            $result = $ajaxLogic->check_userinfo();
            if (!empty($result['data']['ey_is_login'])) {
                $assignData = [
                    'users' => $result['users'],
                ];
                $this->assign($assignData);

                $filename = './template/'.THEME_STYLE_PATH.'/'.'system/users_info.htm';
                if (file_exists($filename)) {
                    $html = $this->fetch($filename); // 渲染模板标签语法
                } else {
                    $html = '缺少模板文件：'.ltrim($filename, '.');
                }
                $result['data']['html'] = $html;
            }
            respose(['code'=>1, 'msg'=>'请求成功', 'data'=>$result['data']]);
        }
        to_index("404");
    }

    /*
     * 下载文件
     * https://www.zc10000.com/api/diyajax/downfile
     */
    public function downFile(){

        $id = request()->get('id',0);
        //var_dump((int)$id);
        //非法
        if((int)$id === 0){
            respose(['code'=>0, 'msg'=>'请求失败！', 'data'=>[]]);
        }
        //查找记录
        $one = Db::name('users_down')->where(['id'=>$id])->find();

        if((int)$one['num'] >= 3){
            respose(['code'=>0, 'msg'=>'该链接请求下载次数不能超过3次，链接已失效！', 'data'=>[]]);
        }

        if((int)$one['expire_time'] < time()){
            //已过期
            respose(['code'=>0, 'msg'=>'下载链接已失效！', 'data'=>[]]);
        }

        //查找下载地址
        $artData = Db::name('zczygz_content')->where('aid', $one['aid'])
            ->find();
        if(empty($artData) || empty($artData['down'])){
            respose(['code'=>0, 'msg'=>'文档不存在！', 'data'=>[]]);
        }

        //php
        $ext = explode('.',$artData['down']);
        $ext = end($ext);
        $filename = $one['title'].'.'.$ext;
        $file = $artData['down'].'?attname='.$filename;
        //$filename = basename($file);
        //echo $file;


        //记录下载次数
        Db::name('users_down')->where(['id'=>$id])->setInc('num');

        header('location:'.$file);
        //$this->downFileCurl($file,$filename);

    }

    public function downFileCurl($url, $file_name)
    {
        header('Content-Description: File Transfer');
        header('Content-Type: application/vnd.android.package-archive');
        header('Content-Disposition: attachment; filename=' . $file_name);
        header('Content-Transfer-Encoding: binary');
        header('Expires: 0');
        header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
        header('Pragma: public');
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 0);
        curl_setopt($ch, CURLOPT_WRITEFUNCTION, function ($ch, $buffer) {
            echo $buffer;
            return strlen($buffer);
        });
        curl_exec($ch);
        curl_close($ch);
    }
}