try to take over the world!
// ==UserScript==
// @name 文泉学堂PDF下载
// @namespace https://52pojie.cn
// @version 0.53
// @description try to take over the world!
// @author Culaccino
// @match https://*.wqxuetang.com/read/pdf/*
// @grant none
// @require https://cdn.staticfile.org/jspdf/1.5.3/jspdf.min.js
// @require https://cdn.staticfile.org/blueimp-md5/2.12.0/js/md5.min.js
// ==/UserScript==
(function () {
const downloadNum = 20 //每次达到此页数就自动保存，可根据实际情况改动
var imgBox, nowPage, allPage, doc, size, name, startNum = 1,isStart = false, pageList, dataIndex, beginTime = new Date(),dataList = {}
const baseURL = `https://${window.location.host}/`
if (baseURL.indexOf("www") > -1) {
window.location.href = window.location.href.replace("www", "lib-nuanxin")
}
const bid = window.location.href.replace(baseURL + "read/pdf/", "")
const headers = {
"headers": {
"User-Agent": navigator.userAgent,
"Accept": "*/*",
"Accept-Language": "zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2",
"Cache-Control": "max-age=0"
},
"referrer": window.location.href,
"method": "GET"
}
Array.prototype.remove = function (val) {
const index = this.indexOf(val);
if (index > -1) this.splice(index, 1)
}
function print() {
console.log(...arguments)
}
function sleep(min, max) {
min *= 1000;
max *= 1000;
const time = !min ? max : Math.floor(Math.random() * (max - min + 1)) + min;
print(time)
return new Promise((resolve) => setTimeout(resolve, time));
}
function createList(now) {
let arr = []
for (let i = now || nowPage; i < Math.min((now || nowPage) + downloadNum, allPage + 1); i++) arr.push(i)
startNum = arr[0]
return arr
}
function addPDF(base64) {
doc.addImage(base64, 'JPEG', 0, 0, size[0], size[1])
}
function savePDF(num) {
doc.save(`${name}_${num !== allPage ? num - downloadNum + 1 : Math.max(Math.floor(num / downloadNum) * downloadNum + 1, nowPage)}-${num}.pdf`)
if (num !== allPage) doc = new jsPDF(size[0] < size[1] ? "" : "l", 'pt', size)
print("总耗时 " + parseInt((new Date() - beginTime) / 1000 / 60) + " 分钟")
}
function getInfo(url) {
const data = fetch(url, headers).then(function (res) {
if (res.status >= 200 && res.status < 300) return res.json();
else throw new Error(res.statusText)
})
data.then(v => {name = v.data.name;print(name)})
}
function getImg(num) {
const base64 = dataList[num];
let img = new Image();
img.src = base64;
img.onload = function () {
if (!isStart) {
doc = new jsPDF(size[0] < size[1] ? "" : "l", 'pt', size)
isStart = !isStart
}
addPDF(base64)
if (num === allPage) {
isStart = !isStart
savePDF(num)
return
} else if (num % downloadNum === 0) {
dataList = {}
savePDF(num)
pageList = dataIndex = createList(num + 1)
autoScroll(0)
return
}
doc.addPage()
getImg(num += 1)
}
}
async function autoScroll(num, isCorrect = true) {
if (pageList.length === 0) {
isStart = !isStart
getImg(startNum)
return
}
if (pageList[num - 1] === pageList[pageList.length - 1]) num = 0
print(pageList[num], num, pageList.length)
document.documentElement.scrollTop = imgBox[pageList[num]].offsetTop
let src = imgBox[pageList[num]].firstChild.getAttribute("src")
if (!src || src.indexOf("data:image/") === -1 || !isCorrect) {
await sleep(8, 10)
src = imgBox[pageList[num]].firstChild.getAttribute("src")
}
if (!src || src.indexOf("width=160") > -1) autoScroll(num += 1)
else {
let img = new Image();
img.src = src;
img.onload = async function () {
let w = img.width, h=img.height
if(!size){size = [w, h]}
print([w, h])
if(size[0] - w > 200){
autoScroll(num += 1, false)
}else{
dataList[pageList[num]] = src
pageList.remove(pageList[num])
autoScroll(num)
}
}
}
}
window.onload = function () {
document.getElementById("pagebox").onclick = function () {
if (!isStart) {
const numBox = document.getElementsByClassName("page-head-tol")[0].innerHTML
getInfo("https://lib-nuanxin.wqxuetang.com/v1/read/initread?bid=" + bid)
imgBox = document.getElementsByClassName("page-img-box")
nowPage = parseInt(numBox.slice(0, numBox.indexOf("/") - 1))
allPage = imgBox.length - 1
isStart = !isStart
pageList = dataIndex = createList()
autoScroll(0)
} else return
}
window.onbeforeunload = function () {if (isStart) return "leave？"}
}
})();