文泉学堂PDF下载修复版

用于文泉学堂pdf下载
安裝腳本 ?
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// ==UserScript==
// @name         文泉学堂PDF下载修复版
// @namespace    https://52pojie.cn
// @version      0.550
// @description  用于文泉学堂pdf下载
// @author       Culaccino
// @author       kv2036
// @match        https://*.wqxuetang.com/read/pdf*
// @grant        unsafeWindow
// @require      https://cdn.staticfile.org/jspdf/1.5.3/jspdf.min.js
// @license      暂无
// ==/UserScript==
 
(function () {
    const fuckwenquan = jsPDF;
    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, School, beginTime = new Date(), dataList = {}
    const baseURL = `https://${unsafeWindow.location.host}/`
    if (baseURL.indexOf("www") > -1) {
        unsafeWindow.location.href = unsafeWindow.location.href.replace("www", School)
    }
    const bid = getStr(unsafeWindow.location.href)[2]
    const headers = {
        "headers": {
            "User-Agent": navigator.userAgent,
            "Accept": "*/*",
            "Accept-Language": "zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2",
            "Cache-Control": "max-age=0"
        },
        "referrer": unsafeWindow.location.href,
        "method": "GET"
    }
    Array.prototype.remove = function (val) {
        const index = this.indexOf(val);
        if (index > -1) this.splice(index, 1)
    }
    function print() {
        //console.log(...arguments)
    }
    function getStr(str) { //取中间字符
        let res = str.match(new RegExp(`https://(.*?).wqxuetang.com/read/pdf[?]bid=([0-9]*$)`))
        return res ? res : -1
        // https://wqbook.wqxuetang.com/read/pdf?bid=1142211
    }
    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 = fuckwenquan(size[0] < size[1] ? "p" : "l", 'pt', size)
        print("总耗时 " + parseInt((new Date() - beginTime) / 1000 / 60) + " 分钟")
    }
    function getInfo(url) {
        console.log(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 fuckwenquan(size[0] < size[1] ? "p" : "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)
        //unsafeWindow.document.unsafeWindow.documentElement.scrollTop = imgBox[pageList[num]].offsetTop
        unsafeWindow.document.getElementById("scroll").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)
                }
            }
        }
    }
    console.log(bid)
    let id = setInterval(() => {
        if (unsafeWindow.document.querySelector('#pagebox') !== null) {
            clearInterval(id);
            // 该干嘛干嘛
            console.log('pagebox渲染完成');
            unsafeWindow.document.getElementById("pagebox").ondblclick = function () {
                console.log(bid)
                if (!isStart) {
                    const numBox = unsafeWindow.document.getElementsByClassName("page-head-tol")[0].innerHTML
                    School = getStr(unsafeWindow.location.href)[1]
                    getInfo("https://" + School + ".wqxuetang.com/v1/read/initread?bid=" + bid)
                    imgBox = unsafeWindow.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
            }
        }
        else {
 
 
            console.log("正在渲染pagebox")
        }
    }, 5);
 
    unsafeWindow.onbeforeunload = function () { if (isStart) return "leave？" }
})();
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