Greasy Fork is available in English.
try to take over the world!
当前为
// ==UserScript==
// @name 文泉学堂PDF下载
// @namespace https://dsb.ink
// @version 0.1
// @description try to take over the world!
// @author zkw6666
// @match https://lib-nuanxin.wqxuetang.com/read/pdf/*
// @grant none
// @require https://cdn.staticfile.org/crypto-js/3.1.9/hmac-sha256.min.js
// @require https://cdn.staticfile.org/crypto-js/3.1.9/enc-base64.min.js
// @require https://cdn.staticfile.org/jspdf/1.5.3/jspdf.min.js
// ==/UserScript==
(function() {
const bid = window.location.href.replace("https://lib-nuanxin.wqxuetang.com/read/pdf/","")
const headers = {
"credentials": "include",
"headers": {
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:72.0) Gecko/20100101 Firefox/72.0",
"Accept": "*/*",
"Accept-Language": "zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2",
"Cache-Control": "max-age=0"
},
"referrer": "https://lib-nuanxin.wqxuetang.com/read/pdf/" + bid,
"method": "GET",
"mode": "cors"
}
var doc,size,allPage,name,btn = document.createElement("button");
const w = 100,
h = 40
btn.innerHTML = "初始化..."
btn.setAttribute("style",`position: fixed; cursor:pointer;z-index: 10000; top: 0px; left: 50%; margin-left: -146.5px;width: ${w}px;height: ${h}px;border: none;background: #004DA9;color: #fff;font-size: 16px;border-radius: 0 0 10px 10px;`)
btn.style.marginLeft = -w / 2 + "px"
document.body.appendChild(btn)
function print(){console.log(...arguments)}
function error(){console.error(...arguments)}
var Download = function(){
return new Download.INIT()
}
Download.INIT = function(){
const data = fetch("https://lib-nuanxin.wqxuetang.com/v1/read/initread?bid=" + bid, headers).then(function(res){
if(res.status >=200 && res.status <300){
return res.json();
}else{
var error = new Error(res.statusText)
error.res = res
throw error
}})
data.then(v=>{d.init(v)})
}
var d = Download.INIT.prototype;
d.init = function(val){
this.val = val["data"];
this.page = 1;
this.baseURL = "https://lib-nuanxin.wqxuetang.com/";
this.bid = bid;
this.jwtSecret = "g0NnWdSE8qEjdMD8a1aq12qEYphwErKctvfd3IktWHWiOBpVsgkecur38aBRPn2w";
name = this.val["name"];
const data = fetch(`${this.baseURL}v1/read/k?bid=${this.bid}`, headers).then(function(res){
if(res.status >=200 && res.status <300){
return res.json();
}else{
var error = new Error(res.statusText)
error.res = res
throw error
}})
data.then(v=>{d.getData(v, this.page)})
}
d.getData =function(a, p){
const time = Date.parse(new Date).toString().slice(0,10),
foreCode = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9",
payload = {
p: p,
t: parseInt(time + "000"),
b: this.bid,
w: 1e3,
k: a.data,
iat: parseInt(time)
}
const result = d.jsonWebToken(foreCode,payload,this.jwtSecret);
try{d.convertImgToBase64(result, "jpeg",p, a)}
catch(e){error("连接出错，开始重新获取", e);d.getData(a, p)}
//doc.addImage(base64, 'JPEG', 0, 0, 1439, 1998)
//doc.save('hello.pdf')
}
d.jsonWebToken = function(f,p,s){
const b64 = f + "." +btoa(d.objToString(p)).replace(/[=]/g,"");
var hash = CryptoJS.HmacSHA256(b64, s);
var hashInBase64 = CryptoJS.enc.Base64.stringify(hash);
hashInBase64 = hashInBase64.replace(/[+]/g, "-").replace(/[/]/g, "_").replace(/[=]/g, "")
return `${this.baseURL}page/img/${this.bid}/${this.page}?k=${b64}.${hashInBase64}`
}
d.objToString = function(obj,onoff){
let str = "{";
const sym = v => {let a = onoff ? '\\"' : '"';return a + v + a}
for(let i in obj){
const item = obj[i]
if(typeof item === "object"){
str += sym(i) + ':"' + d.objToString(item,1) + '"'
}else if(typeof item === "number"){
str += sym(i) + ":" + item
}else if(typeof item === "string"){
str += sym(i) + ":" + sym(item)
}
str += ","
}
return str.slice(0,str.length - 1) + "}"
}
//https://lib-nuanxin.wqxuetang.com/read/pdf/2175744
d.convertImgToBase64 = function (url, ext, p, a) {
let canvas = document.createElement('canvas'),
ctx = canvas.getContext('2d'),
img = new Image,
data = ""
btn.innerHTML = `${p}/${allPage}`
img.crossOrigin = '';
img.onload = function () {
canvas.height = img.height;
canvas.width = img.width;
ctx.drawImage(img, 0, 0);
var dataURL = canvas.toDataURL('image/' + ext);
canvas = null;
doc.addImage(dataURL, 'JPEG', 0, 0, size[0], size[1])
if(p === allPage){doc.save(name + '.pdf');btn.innerHTML = "已完成";return}
doc.addPage()
d.getData(a, p += 1)
};
img.src = url;
}
window.Download = Download;
window.onload = function(){
btn.innerHTML = "下载PDF"
btn.onclick = function(){
var getSize = function(){
const imgBox = document.getElementsByClassName("page-img-box")[1]
return [imgBox.offsetWidth,imgBox.offsetHeight]
}
size = getSize()
let a = document.getElementsByClassName("page-head-tol")[0].innerHTML
allPage = parseInt(a.slice(a.indexOf("/") + 1,a.length))
this.innerHTML = "加载中...";
doc = new jsPDF("", 'px', size)
Download()
}
}
})();