billiards-server/application/index/controller/Index.php

<?php

namespace app\index\controller;

use app\api\model\Channel;
use app\common\controller\Frontend;

class Index extends Frontend
{

    protected $noNeedLogin = '*';
    protected $noNeedRight = '*';
    protected $layout = '';

    public function index()
    {
        return $this->view->fetch();
    }


    /**
     * @param null $channel_key
     * @throws \think\Exception
     */
    public function download($channel_key = null)
    {
        $file_name = "__UNI__D48D872_0515172908.zip";//需要下载的文件
        $file_path = ROOT_PATH . DS . "public" . DS . "uploads" . DS . "download" . DS . $file_name; //文件目录
        $file_name = iconv("utf-8", "gb2312", "$file_name");
        $fp = fopen($file_path, "r+");//下载文件必须先要将文件打开，写入内存
        if (!file_exists($file_path)) {//判断文件是否存在
            echo "文件不存在";
            exit();
        }
        $file_size = filesize($file_path);//判断文件大小
        //返回的文件
        Header("Content-type: application/octet-stream");
        //按照字节格式返回
        Header("Accept-Ranges: bytes");
        //返回文件大小
        Header("Accept-Length: " . $file_size);
        //弹出客户端对话框，对应的文件名
        Header("Content-Disposition: attachment; filename=" . $file_name);
        //防止服务器瞬时压力增大，分段读取
        $buffer = 1024;
        while (!feof($fp)) {
            $file_data = fread($fp, $buffer);
            echo $file_data;
        }
        if (!is_null($channel_key)) {
            Channel::increase(null, $channel_key, "download_count");
        }
        //关闭文件
        fclose($fp);
    }

}