获取apk文件

点击下载

反编译apk

1. apktool.bat；apktool.jar
   作用：最大程度的还原apk中的manifest文件和资源文件 。使用apktool工具反编译apk文件比直接解压同一个apk文件大；还可以将反编译之后的apk重新打包成apk文件，但需要重新签名，才能安装使用。

2. classes-dex2.jar
   作用：将APK直接解压后，目录下包含的一个classes.dex文件反编译为

3. dex2jar
   作用：直接查看classes-dex2jar.jar文件

分析反编译后的包体

查看包体，会得到assets目录,如图

apps目录则是app的核心代码，这里没有经过原生安卓的方法，因为经过分析，此app是使用MUI，用js编写的app，为webview，所有核心代码都在此目录！我们使用HbuilderX打开此目录，则app的工程文件自动显示，接下来，我们可以随意查看代码

分析代码业务逻辑

查看代码后，我们会得到如下信息:
1. app接口: http://api.51moot.cn/api/

2. 静态资源网址: https://mootimg.oss-cn-beijing.aliyuncs.com/Moot/

3. 核心sign获取接口:http://api.51moot.cn/api/v1/sign

所有请求都会验证sign的正确性，不过可笑的是这个sign是固定的！

分析播放业务逻辑

通过查阅代码，我们可以找到视频播放页面是course_vedio.html，核心代码course_vedio.js文件，以下是播放器初始化代码，可以看出只需要传入我们的用户ID就可以统计时长

通过百度查找polyvObject方法，我们可以得到这是保利威公司的播放器sdk，核心依赖sdk文档->点击查看
至此，我们只需要拼接所需信息即可完成模拟播放，以下是我封装过的接口，使用php语言编写，通过此接口我们可以得到任何想要的信息

更新日志:

2021-01-07：
(1.)支持学生账户提取试卷及一键答题
2020-10-28:
(1.)修复APP外部与内部进度不同步的问题
2020-09-02:
(1.)修复节点失效
2020-08-17:
(1.)增加一键秒刷
2020-06-03:
(1.)增加pc协议支持
(2.)增加pc cookie提取
(3.)增加pc协议的视频加密信息获取
(4.)网站同时支持falsh和h5内核，播放更加流畅
(5.)优化答题业务逻辑

<?php

namespace SinKingCloud;

class Mstanford
{
    private $ApiUrl = array('pc' => 'https://www.51moot.net/', 'mobile' => 'http://112.126.118.66/');
    private $sign; //签名
    private $UserInfo; //账户信息
    public $cookies = null; //pc cookie
    /**
     *构造参数
     */
    function __construct($ApiUrl = false, $sign = false)
    {
        if ($ApiUrl) {
            $this->ApiUrl = $ApiUrl;
        }
        if ($sign) {
            $this->sign = $sign;
        } else {
            $this->sign = $this->get_sign();
        }
    }
    /**
     * 获取sign
     * @return String 签名
     */
    private function get_sign()
    {
        $res = $this->get_curl($this->ApiUrl['mobile'] . "/api/v1/sign");
        $arr = json_decode($res, true);
        if (!array_key_exists('code', $arr)) {
            return false;
        }
        if ($arr['code'] == 0) {
            return $arr['data'];
        } else {
            return false;
        }
    }
    /**
     * 账户登陆(app协议)
     * @param String $user 账户
     * @param String $pwd 密码
     * @return Array 数据集
     */
    public function UserLogin($user, $pwd)
    {
        if (!empty($user) && !empty($pwd)) {
            if (empty($this->sign)) {
                $this->get_sign();
            }
            $res = $this->get_curl($this->ApiUrl['mobile'] . "/api/v1/web_user?login_name=" . $user . "&login_pass=" . $pwd . "&sign=" . $this->sign);
            $arr = json_decode($res, true);
            if (!array_key_exists('code', $arr)) {
                return false;
            }
            if ($arr['code'] == 0) {
                $this->UserInfo = $arr['data'];
                return $arr['data'];
            } else {
                return false;
            }
        } else {
            return false;
        }
    }
    /**
     * 账户登陆(pc协议)
     * @param String $user 账户
     * @param String $pwd 密码
     * @return Array 数据集
     */
    public function UserPcLogin($user, $pwd)
    {
        if (!empty($user) && !empty($pwd)) {
            if (empty($this->sign)) {
                $this->get_sign();
            }
            $res = $this->get_curl($this->ApiUrl['pc'] . "/main/login_validate", "login_name=" . $user . "&login_pass=" . $pwd . "&auto_login=true", 0, 0, 1);
            $arr = explode("n", $res);
            $data = json_decode(end($arr), true);
            if ($data['code'] == 'success') {
                //取cookie
                preg_match_all('/Set-Cookie: (.*?);/', $res, $arr);
                $this->cookies = implode(";", $arr[1]);
                //二次登陆获取用户信息
                return $this->UserLogin($user, $pwd);
            } else {
                return false;
            }
        } else {
            return false;
        }
    }
    /**
     * 账户信息查询(app协议)
     * @param Int $uid 账户ID
     * @return Array 数据集
     */
    public function UserQuery($uid)
    {
        if (!empty($uid)) {
            if (empty($this->sign)) {
                $this->get_sign();
            }
            $res = $this->get_curl($this->ApiUrl['mobile'] . '/api/v1/web_user?id=' . $uid . '&sign=' . $this->sign);
            $arr = json_decode($res, true);
            if (!array_key_exists('code', $arr)) {
                return false;
            }
            if ($arr['code'] == 0) {
                $this->UserInfo = $arr['data'];
                return $arr['data'];
            } else {
                return false;
            }
        } else {
            return false;
        }
    }
    /**
     * 课程信息查询(app协议)
     * @param Array $id 课程ID
     * @return Array 数据集
     */
    public function CourseQuery($id = array(), $uid = 6518)
    {
        if (empty($id) || !is_array($id) || empty($this->sign)) {
            return false;
        } else {
            $list = implode(',', $id);
            $data = array();
            for ($i = 1; $i <= 5; $i++) {
                $res = $this->get_curl($this->ApiUrl['mobile'] . "/api/v1/course_info?page_index=0&page_size=9999&id_list=" . $list . "&type=1&is_progress=true&user_id=" . $uid . "&assort_id=3&sign=" . $this->sign);
                $arr = json_decode($res, true);
                if (!array_key_exists('code', $arr)) {
                    continue;
                }
                if ($arr['code'] == 0) {
                    foreach ($arr['data']['rows'] as $key) {
                        $data[] = $key;
                    }
                } else {
                    continue;
                }
            }
            return $data;
        }
    }
    /**
     * 课程详情(app协议)
     * @param Int $id 课程ID
     * @return Array
     */
    public function CourseInfo($id)
    {
        if (empty($id)) {
            return false;
        }
        if (empty($this->sign)) {
            $this->get_sign();
        }
        $res = $this->get_curl($this->ApiUrl['mobile'] . "/api//v1/course_dirctory?course_id=" . $id . "&sign=" . $this->sign);
        $arr = json_decode($res, true);
        if (!array_key_exists('code', $arr)) {
            return false;
        }
        if ($arr['code'] == 0) {
            return $arr['data'];
        } else {
            return false;
        }
    }
    /**
     * 视频详情(app协议)
     * @param Array $id 课程ID
     * @return Array 数据集
     */
    public function DirctoryInfo($id)
    {
        if (empty($id)) {
            return false;
        } else {
            if (empty($this->sign)) {
                $this->get_sign();
            }
            $res = $this->get_curl($this->ApiUrl['mobile'] . "/api/v1/course_dirctory?id=" . $id . "&is_dirctory=true&sign=" . $this->sign);
            $arr = json_decode($res, true);
            if (!array_key_exists('code', $arr)) {
                return false;
            }
            if ($arr['code'] == 0) {
                return $arr['data'];
            } else {
                return false;
            }
        }
    }
    /**
     * 视频详情(pc协议)
     * @param Array $id 课程ID
     * @return Array 数据集
     */
    public function DirctoryPcInfo($id)
    {
        if (empty($id)) {
            return false;
        } else {
            if (empty($this->cookies)) {
                return false;
            }
            $res = $this->get_curl($this->ApiUrl['pc'] . "/server_hall_2/server_hall_2/video_play?dir_id=" . $id . "&do=_do", 0, 0, $this->cookies);
            //取视频加密信息
            preg_match_all('/polyvPlayer([sS]*?);/i', $res, $arr);
            if (isset($arr[0][0])) {
                $res = substr(substr($arr[0][0], 12), 0, -2);
                $arr = json_decode(str_replace(array("n", "t", "wrap", "false", "'"), array("", "", "'wrap'", "'false'", '"'), $res), true);
                return array(
                    'vid' => $arr['vid'],
                    'ts' => $arr['ts'],
                    'sign' => $arr['sign'],
                    'session_id' => $arr['session_id'],
                    'playsafe' => $arr['playsafe']
                );
            } else {
                return false;
            }
        }
    }
    /**
     * 试卷评测(app协议)
     * @param Int $id 试卷ID
     * @param Int $uid 用户ID
     * @param Int $num 错误的个数
     * @return Array 数据集
     */
    public function CourseTest($id, $uid, $num = 0)
    {
        if (empty($id) || empty($uid)) {
            return false;
        }
        if (empty($this->sign)) {
            $this->get_sign();
        }
        $arr = $this->GetTestInfo($id);
        if ($arr) {
            $data1 = "api_action=evaluating_check&example_id=" . $id . "&user_id=" . $uid . "&sign=" . $this->sign;
            $ids = array();
            $ids2 = array();
            $errors = array();
            for ($i = 0; $i < $num; $i++) {
                $errors[] = rand(0, count($arr));
            }
            $i = 0;
            foreach ($arr as $value) {
                $ids[] = $value['id'];
                if (in_array($i, $errors)) {
                    $value['answer_list'] = rand(0, 3);
                }
                $ids2[] = '&answer_list' . $value['id'] . '=' . $value['answer_list'];
                $i++;
            }
            $data2 = "&subject_id_list=" . implode("[{@}]", $ids);
            $data3 = implode("", $ids2);
            $data = $data1 . $data2 . $data3;
            $res2 = $this->put_curl($this->ApiUrl['mobile'] . "/api/v1/example_subject", $data);
            $arr2 = json_decode($res2, true);
            if ($arr2['code'] == 0) {
                return $arr2['data'];
            } else {
                return false;
            }
        } else {
            return false;
        }
    }
    /**
     * 试卷评测结果(app协议)
     * @param Int $id 试卷ID
     * @param Int $uid 用户ID
     * @return Array 数据集
     */
    public function GetTestResault($id, $uid)
    {
        if (empty($id) || empty($uid)) {
            return false;
        }
        if (empty($this->sign)) {
            $this->get_sign();
        }
        $res = $this->get_curl($this->ApiUrl['mobile'] . "/api/v1/example_result?example_id=" . $id . "&user_id=" . $uid . "&is_ext=true&sign=" . $this->sign);
        $arr = json_decode($res, true);
        if (!array_key_exists('code', $arr)) {
            return false;
        }
        return $arr['data'];
    }
    /**
     * 试卷详情(app协议)
     * @param Int $id 试卷ID
     * @return Array 数据集
     */
    public function GetTestInfo($id)
    {
        if (empty($this->sign)) {
            $this->get_sign();
        }
        $res = $this->get_curl($this->ApiUrl['mobile'] . "/api/v1/example_subject?example_id=" . $id . "&is_random=false&sign=" . $this->sign);
        $arr = json_decode($res, true);
        if (!array_key_exists('code', $arr)) {
            return false;
        }
        if ($arr['code'] == 0) {
            return $arr['data'];
        }
        return false;
    }
    /**
     * 用户试卷列表(pc协议)
     * @param Boolean 是否为老师
     * @return Array 数据集
     */
    public function GetTestList($admin = false)
    {
        if (empty($this->cookies)) {
            return false;
        }
        $type = $admin ? "tea" : "stu";
        $res = $this->get_curl($this->ApiUrl['pc'] . "/server_hall_2/" . $type . "/examine", 0, 0, $this->cookies);
        preg_match_all('/JSON.parse[sS]*?}/i', $res, $arr);
        if ($arr[0]) {
            $new = array();
            foreach ($arr[0] as $key) {
                $txt = htmlspecialchars_decode(str_replace("JSON.parse('", "", $key));
                $arr2 = json_decode($txt, true);
                if (empty($arr2['id']) || empty($arr2['title'])) continue;
                $new[] = array(
                    'id' => $arr2['id'],
                    'title' => $arr2['title']
                );
            }
            $tmp_arr = array();
            foreach ($new as $k => $v) {
                if (in_array($v['id'], $tmp_arr)) {
                    unset($new[$k]);
                } else {
                    $tmp_arr[$k] = $v['id'];
                }
            }
            return $new;
        } else {
            return false;
        }
    }

    /**
     * 观看视频
     * @param Int $user_id 用户id
     * @param String $video_id 视频id值
     * @param Int $times 观看秒数
     * @param Int $id 视频id
     * @return Boolean 执行结果
     */
    public function LookVideo($user_id, $video_id, $times, $id)
    {
        $pid = time() . rand(100, 999) . 'X' . rand(100000, 999999);
        $vid = $video_id;
        $uid = substr($vid, 0, 10);
        $flow = 0;
        $ts = time() . "886";
        $href = 'https://www.51moot.net/server_hall_2/server_hall_2/video_play?dir_id=' . $id . '&do=_do';
        $duration = $times;
        $cts = $times;
        $pd = $times;
        $sd = 10;
        $param2 = base64_encode($user_id);
        $pn = 'HTML5';
        $pv = 'v1.15.1';
        $cataid = "1480326650851";
        $sign = md5("rtas.net" . $pid . $vid . '0' . $pd . $cts);
        $url = 'https://prtas.videocc.net/v2/view?pid=' . $pid . '&vid=' . $vid . '&uid=' . $uid . '&flow=' . $flow . '&ts=' . $ts . '&href=' . base64_encode($href) . '&duration=' . $duration . '&cts=' . $cts . '&sign=' . $sign . '&sd=' . $sd . '&pd=' . $pd . '&pn=' . $pn . '&pv=' . $pv . '&param2=' . $param2 . '&cataid=' . $cataid . '&ute=bop';
        return $this->get_curl($url) == "1";
    }

    /**
     * Curl get post请求
     * @param String $url 网址
     * @param String $post POST参数
     * @param String $referer refer地址
     * @param String $cookie 携带COOKIE
     * @param String $header 请求头
     * @param String $ua User-agent
     * @param String $nobaody 重定向
     * @return String 数据
     */
    private function get_curl($url, $post = 0, $referer = 0, $cookie = 0, $header = 0, $ua = 0, $nobaody = 0)
    {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_TIMEOUT, 60);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        $clwl[] = "Accept:*/*";
        $clwl[] = "Accept-Encoding:gzip,deflate,sdch";
        $clwl[] = "Accept-Language:zh-CN,zh;q=0.8";
        curl_setopt($ch, CURLOPT_HTTPHEADER, $clwl);
        if ($post) {
            curl_setopt($ch, CURLOPT_POST, 1);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
        }
        if ($header) {
            curl_setopt($ch, CURLOPT_HEADER, TRUE);
        }
        if ($cookie) {
            curl_setopt($ch, CURLOPT_COOKIE, $cookie);
        }
        if ($referer) {
            if ($referer == 1) {
                curl_setopt($ch, CURLOPT_REFERER, $this->ApiUrl .  $url);
            } else {
                curl_setopt($ch, CURLOPT_REFERER, $referer);
            }
        }
        if ($ua) {
            curl_setopt($ch, CURLOPT_USERAGENT, $ua);
        } else {
            curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Linux; U; Android 4.0.4; es-mx; HTC_One_X Build/IMM76D) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0');
        }
        if ($nobaody) {
            curl_setopt($ch, CURLOPT_NOBODY, 1);
            //主要头部
            curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); //跟随重定向
        }
        curl_setopt($ch, CURLOPT_ENCODING, "gzip");
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $ret = curl_exec($ch);
        curl_close($ch);
        return $ret;
    }
    /**
     * Curl PUT请求
     * @param String $url 网址
     * @param String $data 参数
     * @param Array $header 请求头
     * @return String 数据
     */
    private function put_curl($url, $data = "", $header = array())
    {
        $ch = curl_init();
        $header[] = "Content-type:application/x-www-form-urlencoded";
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PUT");
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
        $res = curl_exec($ch);
        curl_close($ch);
        return $res;
    }
}

总体功能实现

封装完接口，我们可以得到想要功能，我们可以实现多视频同时播放来实现，以下是实现效果