// ==UserScript==
// @name 云端课堂回放下载
// @namespace http://tampermonkey.net/
// @license MIT
// @version 0.3
// @description 云端课堂所有回放解析,一次性下载所有大班课回放
// @author You
// @match https://e62580258.at.baijiayun.com/web/course/*
// @icon https://www.google.com/s2/favicons?sz=64&domain=baijiayun.com
// @grant none
// @require https://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.5.1.min.js
// @require https://cdn.bootcdn.net/ajax/libs/axios/1.5.0/axios.min.js
// @require https://unpkg.com/layui@2.9.7/dist/layui.js
// @require https://cdn.bootcdn.net/ajax/libs/vue/2.7.9/vue.min.js
// @require https://cdn.bootcdn.net/ajax/libs/qs/6.11.2/qs.min.js
// ==/UserScript==
var i = function (e, t) {
var r = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var n = r.indexOf(e.charAt(t));
if (-1 === n) throw "Cannot decode base64";
return n
};
// 解密视频地址
var decryptVideo = function(e) {
if ("" === e || 0 !== e.indexOf("bjcloudvod://"))
return "";
var t = (e = e.slice("bjcloudvod://".length, e.length).replace(/-/g, "+").replace(/_/g, "/")).length % 4;
2 === t ? e += "==" : 3 === t && (e += "=");
var n = (e = bb(e)).charCodeAt(0) % 8;
e = e.slice(1, e.length);
for (var i, a = [], s = 0; i = e[s]; s++) {
var o = s % 4 * n + s % 3 + 1;
a.push(String.fromCharCode(i.charCodeAt(0) - o))
}
return a.join("").replace("https:", "").replace("http:", "")
};
// 解密编码
var bb = function (e) {
var t, n, r = 0,
a = e.length,
s = [];
if (e = String(e), 0 === a) return e;
if (a % 4 != 0) throw "Cannot decode base64";
for ("=" === e.charAt(a - 1) && (r = 1, "=" === e.charAt(a - 2) && (r = 2), a -= 4), t = 0; t <
a; t += 4) n = i(e, t) << 18 | i(e, t + 1) << 12 | i(e, t + 2) << 6 | i(e, t + 3), s.push(
String.fromCharCode(n >> 16, n >> 8 & 255, 255 & n));
switch (r) {
case 1:
n = i(e, t) << 18 | i(e, t + 1) << 12 | i(e, t + 2) << 6, s.push(String.fromCharCode(
n >> 16, n >> 8 & 255));
break;
case 2:
n = i(e, t) << 18 | i(e, t + 1) << 12, s.push(String.fromCharCode(n >> 16))
}
return s.join("")
};
// 下载服务器的MP4文件
function downloadMp4(filePath,fileName){
fetch(filePath).then(res => res.blob()).then(blob => {
const a = document.createElement('a');
a.style.display = 'none'
// 使用获取到的blob对象创建的url
const url = window.URL.createObjectURL(blob);
a.href = url;
// 指定下载的文件名
a.download = fileName;
a.click();
// 移除blob对象的url
window.URL.revokeObjectURL(url);
});
}
// 创建一个vue对象，用于保存一些数据
var vueApp = new Vue({
el: '#vueApp',
data: {
// 科目数量
kemuCountList:[],
// 科目信息
kemuInfoList: [],
// 科目里的课程信息,根据title区分
kechengInfoMap:{},
// 最终结果,根据科目分组视频地址
resultList:{}
}
});
top.vueApp = vueApp;
(function() {
console.log("云端课堂脚本3.0开始===========================");
// 引入第三方CSS,使用文档参考
var link = document.createElement('link');
link.id='layuiCss';
link.rel = 'stylesheet';
link.href = 'https://unpkg.com/layui@2.9.7/dist/css/layui.css'; // 替换为你要引入的CSS文件的URL
document.head.appendChild(link);
async function 获取大班科目信息(){
var config = {
method: 'post',
url: '/org/class_playback/getLongTermRoomList?page=1&page_size=60'
};
await axios(config).then(function (response) {
vueApp.kemuInfoList = response.data?.data?.list||[];
console.log('1. 获取大班科目信息')
// 遍历所有大班课信息
for(var i=0;i<vueApp.kemuInfoList.length;i++){
console.log(`2.遍历大班科目信息，获取课程---------------当前进度${i+1}/${vueApp.kemuInfoList.length}`);
var kemuInfo = vueApp.kemuInfoList[i];
某科目回放(kemuInfo.playback_count,kemuInfo.room_id,kemuInfo.title)
}
console.log('2.课程获取完毕')
}).catch(function (error) {
console.log(error);
});
}
/**
* pageSize 页大小
* roomId 教室id
*/
async function 某科目回放(pageSize,roomId,title){
var config = {
method: 'post',
url: '/org/class_playback/getLongTermList',
headers: {
'Content-Type': 'application/x-www-form-urlencoded'
},
data : {
'page': 1,
'page_size': pageSize,
'room_id': roomId
}
};
await axios(config).then(function (response) {
vueApp.kechengInfoMap[title] = response.data?.data?.list||[];
}).catch(function (error) {
console.log(error);
});
}
function 获取视频地址(title,room_id,player_token,session_id,jindu){
if(!room_id){
return false;
}
var config = {
method: 'get',
url: `/web/playback/getPlayInfo?room_id=${room_id}&token=${player_token}&session_id=${session_id}&user_name=default&user_number=0&use_encrypt=1&render=jsonp&skip_encrypt=0`,
};
axios(config).then(function (response) {
vueApp.resultList[title] = vueApp.resultList[title] || [];
var responseBody = response.data;
// 都获取到链接了还等啥，直接下载吧
// 默认获取画质最高的
var play_info = responseBody.data['play_info'];
console.log(play_info);
var videoUrl = play_info['superHD'] || play_info['high'] || play_info['720p'] || play_info['low'];
videoUrl = videoUrl.cdn_list[0].enc_url;
console.log(videoUrl);
videoUrl = "http:" + decryptVideo(videoUrl);
// 视频名称
var fileName = `${responseBody.data.video_info.title}.${responseBody.data.format}`;
vueApp.resultList[title].push({"fileName":fileName,"videoUrl":videoUrl});
console.log(`进度：${jindu} 开始收集视频-视频名称${fileName},视频地址解析后${videoUrl}`);
}).catch(function (error) {
console.log(error);
});
}
// 初始化方法
function initFunction() {
console.log('页面加载完成，开始执行脚本');
// 1.添加我的菜单到左侧菜单树
var myMenu = `<div class="bjy-tab-item" id="myMenu" onclick="downloadAllFile()"><i class="bjy-icon bjy-video"></i>专迪下载</div>`;
$(".bjy-tab").append(myMenu);
console.log("1.添加我的菜单到左侧菜单树");
获取大班科目信息();
console.log('某科目回放 收集完毕')
console.log(vueApp.kechengInfoMap);
// 我认为10s后，所有的科目都收集齐了，这时候就该下载了，不要轻易刷新该网页
layer.msg("倒计时10s，后再点击【下载】");
let countdown = 10;
const timerId = setInterval(() => {
console.log(countdown);
countdown--;
if (countdown === 0) {
clearInterval(timerId);
console.log('Countdown finished!');
return false;
}
layer.msg(countdown);
}, 1000);
setTimeout(function(){
console.log(`3.获取视频地址`);
for(var title in vueApp.kechengInfoMap){
// 获取视频地址
var kechengInfoList = vueApp.kechengInfoMap[title];
for(var i=0;i<kechengInfoList.length;i++){
获取视频地址(title,kechengInfoList[i].room_id,kechengInfoList[i].player_token,kechengInfoList[i].session_id,`${i+1}/${kechengInfoList.length}`);
}
}
},10*1000)
}
window.addEventListener('load', initFunction);
// 下载所有文件
top.window['downloadAllFile'] = function(){
// 开始校验数据是否已完全被下载
var allFileUrlFlag = true;
for(var title in vueApp.kechengInfoMap){
// 获取视频地址
if(vueApp.kechengInfoMap[title].length!=vueApp.resultList[title].length){
allFileUrlFlag = false;
break
}
}
if(!allFileUrlFlag){
layer.msg("数据还没收集完毕，稍等下再来试试吧");
return false;
}
layer.msg("准备开始下载，坐稳了，要出发了");
for(var title in vueApp.resultList){
// 获取视频地址
for(var i=0;i<vueApp.resultList[title].length;i++){
var videoInfo = vueApp.resultList[title][i];
console.log(`下载视频-title:${title},进度：${i+1}/${vueApp.resultList[title].length}`)
downloadMp4(videoInfo.videoUrl,videoInfo.fileName);
}
}
}
})();
