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Direct File for Google Classroom

Directly Download the Files in Google Classroom using Ctrl Click

// ==UserScript==
// @name         Direct File for Google Classroom
// @namespace    http://tampermonkey.net/
// @version      0.4.1
// @description  Directly Download the Files in Google Classroom using Ctrl Click
// @author       You
// @match        https://classroom.google.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=google.com
// @grant        none
// @license MIT
// ==/UserScript==

(function () {

  'use strict';
  // Your code here...

  const M_HREF = "https://drive.google.com/file/d/"

  const linkElmOnClick = function (evt) {

    // const linkElm = this;
    evt.stopPropagation();
    evt.stopImmediatePropagation();

  };

  let pageChangedFlag = false;

  const onPageChanged = () => {
    if (!pageChangedFlag) return;

    const linkSelector = `[href*="${M_HREF}"]:not([data-ozhref])`;
    if (!document.querySelector(linkSelector)) return;

    const links = document.querySelectorAll(linkSelector);
    for (const linkElm of links) {

      const orhref = linkElm.href;

      linkElm.dataset.ozhref = orhref;

      const mres = orhref.match(/https:\/\/drive\.google\.com\/file\/d\/([0-9a-zA-Z\-_+.·]+)\/\w+/);
      // id should be /[0-9a-zA-Z\-_+]+/ in general
      if (!mres) continue;

      const dfileId = `${mres[1]}`;

      // let newHref=`https://drive.google.com/u/1/uc?id=${mres[1]}&export=download`;

      let uo = null;
      try {
        uo = new URL(orhref);
      } catch (e) { }
      if (!uo) continue;

      const uo2 = new URL(`https://drive.google.com/uc?export=download&id=${dfileId}`);

      uo.searchParams.forEach((value, key) => {
        if (key === 'export' || key === 'id') return;
        uo2.searchParams.set(key, value);
      });
      const newHref = uo2.toString();

      if (!newHref || typeof newHref !== 'string') continue;
      // console.log(orhref, newHref)
      // linkElm.setAttribute('href',newHref)

      // let newHref = `https://drive.google.com/uc?export=download&id=${dfileId}&usp=drive_web&authuser=2`
      linkElm.setAttribute('href', newHref);

      linkElm.setAttribute('target', '_blank');

      linkElm.addEventListener('click', linkElmOnClick, true);

    }

  };

  new MutationObserver(() => {
    pageChangedFlag = true;
    Promise.resolve().then(onPageChanged);
  }).observe(document, { subtree: true, childList: true });


  try {
    // trigger onPageChanged
    document.documentElement.appendChild(document.createElement('noscript'));
  } catch (e) { }

})();