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展示USTC网课回放的直链地址
// ==UserScript==
// @name USTC网课下载
// @namespace https://www.bb.ustc.edu.cn/
// @version 0.5
// @description 展示USTC网课回放的直链地址
// @author 398
// @match *://www.eeo.cn/*
// @grant GM_addStyle
// @run-at document-end
// ==/UserScript==
// 观测对象
let observer;
// 创建可用标签
function createOne() {
const path_href = document.createElement('a')
path_href.setAttribute('id', 'download-href');
document.getElementById('lesson-time').appendChild(path_href);
return path_href
}
// 回调
function callBack(mutate) {
let target
try{target = mutate[0].target} catch (e) {return}
let href = document.getElementById('download-href')
href = (href === null || href === undefined)? createOne(): href
href.textContent = '下载链接:' + target.src;
href.href = target.src
}
// 立即执行
(function () {
// 添加样式
GM_addStyle(`#download-href{color: white; cursor: pointer;} #download-href:hover {color: #29875a;}`)
// classin 基于 vue 搭建 SPA 项目，会动态刷新页面，采用监听器监听 video 标签变化。
const playerNode = document.getElementById('player_html5_api')
const config = {
attributes: true,
attributeFilter: ['src']
}
observer = new MutationObserver(callBack)
observer.observe(playerNode, config)
})()