Google Drive 被设置为 Read Only 的 PDF 文件的下载导出

jsPDF 实现 Google 云端硬盘只读 PDF 文件下载导出


/*
Via https://codingcat.codes/2019/01/09/download-view-protected-pdf-google-drive-js-code/
If the images are not complete, try zooming the page to get the full image.
1. Open Developer Tools on separate window and choose the Console tab
2. Paste the code below (and hit enter)
*/

let jspdf = document.createElement("script");

jspdf.onload = function () {

let pdf = new jsPDF();
let elements = document.getElementsByTagName("img");
for (let i in elements) {
let img = elements[i];
if (!/^blob:/.test(img.src)) {
continue;
}
let can = document.createElement('canvas');
let con = can.getContext('2d');
can.width = img.width;
can.height = img.height;
con.drawImage(img, 0, 0);
let imgData = can.toDataURL("image/jpeg", 1.0);
pdf.addImage(imgData, 'JPEG', 0, 0);
pdf.addPage();
}

pdf.save(document.title.split('.pdf - ')[0]+".pdf");
};

jspdf.src = 'https://cdn.bootcss.com/jspdf/1.5.3/jspdf.debug.js';
document.body.appendChild(jspdf);

使用方法:

打开浏览器开发者工具(单窗口打开)选择 Console / 控制台

复制代码，回车执行

如果图片绘制不完整，尝试缩放浏览器页面