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自动下载某在线教程平台的视频

时间 ：2019-9-10  作者： thtomatic  分类： php笔记   评论: [ 0 ] 条  浏览: [ 879 ] 次

<?php
use QL\QueryList as Http;

$HouDunRen = new class{

    public $session ;

    private $host = '';


    /**
     * 获取所有课程的标题和链接
     * @return array
     */
    public function GetCourse() : array
    {
        $obj = Http::get($this->host.'/edu/front/lesson',[],[
            'headers'=>[
                'Cookie'=>'laravel_session='.$this->session.';'
            ]
        ]);
        $last = $obj->find('.edu-front-lesson-index>.container>.row>.lessons>.border-top>ul>li:eq(-2)>a')->text();
        $result = [];
        $result[] = $this->GetCourseList($obj);
        for($i=2;$i<=$last;$i++)
        {
            $obj = Http::get($this->host.'/edu/front/lesson',[
                'page'=>$i
            ],[
                'headers'=>[
                    'Cookie'=>'laravel_session='.$this->session.';'
                ]
            ]);
            $result[] = $this->GetCourseList($obj);
        }
        return $result;

    }

    /**
     * 获取每页的课程名称和链接
     * @param object $obj
     * @return array
     */
    private function GetCourseList(object $obj):array
    {
        $range = '.edu-front-lesson-index>.container>.row>.lessons>.row>.col-12>div>.card>.title';
        $rule = [
            'title'=>['a:eq(0)','text'],
            'url'=>['a:eq(0)','href'],
        ];
        $list = $obj->rules($rule)->range($range)->query()->queryData();
        return $list;
    }

    /**
     * 获取课程的每节标题和链接
     * @param string $CourseUrl 课程链接
     * @return array
     */
    public function GetSection(string $CourseUrl):array
    {
        $obj = Http::get($CourseUrl,[],[
            'headers'=>[
                'Cookie'=>'laravel_session='.$this->session.';'
            ]
        ]);
        $range = '.edu-front-lesson-show>.container>.row>div:eq(0)>.shadow-sm>div:eq(1)>.list-group-flush>.list-group-item>div';
        $rules = [
            'title'=>['a','text'],
            'url'=>['a','href'],
        ];
        $list = $obj->rules($rules)->range($range)->query()->queryData();
        return $list;
    }

    /**
     * 获取当前章节的视频地址
     * @param string $SectionUrl 章节链接
     * @return string
     */
    public function GetVideo(string $SectionUrl):string
    {
        $obj = Http::get($SectionUrl,[],[
            'headers'=>[
                'Cookie'=>'laravel_session='.$this->session.';'
            ]
        ]);
        $video = $obj->find('source')->attr('src');
        return urldecode($video);
    }


    public function DownloadVideo(string $VideoUrl,string $parent):bool
    {
        $VideoUrl = urldecode($VideoUrl);
        $url = parse_url($VideoUrl);
        $VideoName = basename($url['path']);

        $mkdir = function ($dir) use (&$mkdir) {
            return is_dir($dir) or ($mkdir(dirname($dir)) and mkdir($dir,0777));
        };
        $path = 'Video/'.$parent;
        if($mkdir($path))
        {
           return $this->GrabImage($VideoUrl,$VideoName,$path);
        }
        return false;
    }

    /**
     * 下载文件
     * @param string $url
     * @param string $filename
     * @param string $path
     * @return bool
     */
    private function GrabImage(string $url,string $filename,string $path):bool
    {
        if($url==""):return false;endif;
        ob_start();
        readfile($url);
        $file = ob_get_contents();
        ob_end_clean();
        $fp2=@fopen($path."/".$filename, "a");
        fwrite($fp2,$file);
        fclose($fp2);
        return true;
    }

};

$HouDunRen->session='';

$CourseList = $HouDunRen->GetCourse();
foreach ($CourseList as $item)
{
    echo "开始采集".$item['title']."课程\n";
    foreach ($item as $v)
    {
        echo "正在获取".$item['title']."的章节\n";
        $SectionList = $HouDunRen->GetSection($v['url']);
        foreach ($SectionList as $vo)
        {
            echo "寻找".$vo['title']."的视频地址\n";
            $video = $HouDunRen->GetVideo($vo['url']);
            echo "开始下载".$vo['title']."的视频--------------------------";
            if($HouDunRen->DownloadVideo($video,$v['title']))
            {
                echo "成功\n";
            }else{
                echo "失败\n";
            }
        }
    }
}

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