try to take over the world!
// ==UserScript==
// @name 文泉学堂即时下载
// @namespace http://tampermonkey.net/
// @version 0.31
// @description try to take over the world!
// @author ycf
// @match https://*.wqxuetang.com/read/pdf/*
// @grant none
// @require https://cdn.staticfile.org/blueimp-md5/2.12.0/js/md5.min.js
// 基于 https://greasyfork.org/zh-CN/scripts/396025-%E6%96%87%E6%B3%89%E5%AD%A6%E5%A0%82pdf%E4%B8%8B%E8%BD%BD 修改
// ==/UserScript==
(function() {
var imgBox
var name = ''
var fuzzyCount = 0 // 连续出现模糊图片计数
var startPage, allPage = 1
var isStart, isBanned = false
var pageList = []
var coverMD5, lastMD5
const fuzzyCountLimit = 3 // 连续出现模糊图片的次数达到此值，脚本暂停
const limitNum = [64655, 22471]
const limitMD5 = ["aba56eca9b49564cb47bce3f57bd14c2", "d9fff72044ac9a2726972b9dba58aa4e"]
// 用于获取书名
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 agent = navigator.userAgent
const headers = {
"headers": {
"User-Agent": agent,
"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 sleep (max,min) {
const time = !min ? max : Math.floor(Math.random() * (max - min + 1) ) + min;
return new Promise((resolve) => setTimeout(resolve, time));
}
function imgCheck(c){
if(c.length in limitNum && md5(c) in limitMD5){
return false
}
return true
}
function getName(v){
name = v.data.name
}
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=>{getName(v)})
}
function downloadImg(content, fileName) { //下载base64图片
var base64ToBlob = function(code) {
let parts = code.split(';base64,');
let contentType = parts[0].split(':')[1];
let raw = window.atob(parts[1]);
let rawLength = raw.length;
let uInt8Array = new Uint8Array(rawLength);
for(let i = 0; i < rawLength; ++i) {
uInt8Array[i] = raw.charCodeAt(i);
}
return new Blob([uInt8Array], {
type: contentType
});
};
let aLink = document.createElement('a');
let blob = base64ToBlob(content); //new Blob([content]);
let evt = document.createEvent("HTMLEvents");
evt.initEvent("click", true, true); //initEvent 不加后两个参数在FF下会报错 事件类型，是否冒泡，是否阻止浏览器的默认行为
aLink.download = fileName;
aLink.href = URL.createObjectURL(blob);
aLink.click();
}
async function autoScroll(index){ // 自动滚动并下载当前页面图片
if (!isStart){
return
}
if (pageList.length === 0) {
console.log('结束')
alert('运行结束')
isStart = false
return
}
if (index >= pageList.length){
index = 0
}
console.log(`跳转到${pageList[index]}页`)
document.documentElement.scrollTop = imgBox[pageList[index]].offsetTop // 跳转到对应页
let src = imgBox[index].firstChild.getAttribute("src")
if(!src || src.indexOf("data:image/") === -1){ // 未获取到清晰图片，稍作等待
await sleep(3000,5000) // 等待时间范围，可调整
src = imgBox[pageList[index]].firstChild.getAttribute("src")
}
if(!src || src.indexOf("width=160") > -1 || !imgCheck(src)){ // 缩略图，暂时跳过
fuzzyCount += 1
if(fuzzyCount >= fuzzyCountLimit){
isStart = false
alert(`连续出现 ${fuzzyCount} 次模糊图片，请检查是否需要滑动验证`)
return
}
console.log(`${pageList[index]}页模糊，暂时跳过`)
autoScroll(index += 1)
}else{ // base64 图片
fuzzyCount = 0
let srcMD5 = md5(src)
console.log(`MD5: ${srcMD5}`)
if(!coverMD5 && index === 0 && pageList[index] === 1){ // 封面
console.log('记录封面 MD5')
coverMD5 = srcMD5
}else{ // 其他页面
if(coverMD5 === srcMD5 || lastMD5 === srcMD5){ // 其他页面出现封面，或和上一张图片一样（解决未从第一页开始下载没有封面数据的情况）
isStart = false
isBanned = true
alert('检测到封面或和上一张图片一样（最后一张下载的可能是封面，注意清理），请刷新或更换IP')
return
}
}
lastMD5 = srcMD5 // 记录 MD5
// 下载图片
downloadImg(src, `${bid}_${name}_${pageList[index]}.jpg`)
pageList.remove(pageList[index])
autoScroll(index)
}
}
window.onload = function(){
// 获取书名信息
getInfo("https://lib-nuanxin.wqxuetang.com/v1/read/initread?bid="+bid)
document.getElementById("pagebox").onclick = function(){
if (!isStart) { // 未运行
if (isBanned){ // 因下载到封面而暂停无法直接继续运行，先排查问题
alert('请刷新页面（最后一张下载的有可能是封面，注意清理）')
return
}
if (!imgBox){ // 首次运行
console.log('初始化...')
const numBox = document.getElementsByClassName("page-head-tol")[0].innerHTML
imgBox = document.getElementsByClassName("page-img-box")
startPage = parseInt(numBox.slice(0, numBox.indexOf("/") - 1))
allPage = imgBox.length - 1
console.log(name + ' 共：' + allPage + '页')
// 需要下载的范围
for(let i = startPage; i <= allPage; i++){
pageList.push(i)
}
console.log(pageList)
}
isStart = true
autoScroll(0)
}else{ // 运行中
isStart = false
alert('当前页面下载后，将暂停运行')
return
}
}
window.onbeforeunload=function(){
if(isStart) {
return "leave？";
}
}
}
})();