沒什麼技術成分，非常暴力的下載器
// ==UserScript==
// @name Simple Copymanga Downloader
// @namespace -
// @version 0.3.0
// @description 沒什麼技術成分，非常暴力的下載器
// @author LianSheng
// @include https://www.copymanga.com/*
// @include https://copymanga.com/*
// @require https://cdnjs.cloudflare.com/ajax/libs/jszip/3.5.0/jszip.min.js
// @grant GM_addStyle
// @grant GM_getValue
// @grant GM_setValue
// @run-at document-start
// ==/UserScript==
unsafeWindow.oldeval = unsafeWindow.eval;
unsafeWindow.blocked = (...args) => console.log("Blocked", args);
unsafeWindow.eval = (...args) => {
args[0] = args[0].replace("removeChild", "blocked");
args[0] = args[0].replace("remove", "blocked");
console.log(args);
unsafeWindow.oldeval(...args);
}
const waitSeconds = 300;
const CORSProxy = "https://cors1.ls197.workers.dev/?";
const Url = location.href;
const Host = location.host;
// 工具：時間
const Time = {
now: () => Date.now(),
ago: timestamp => Date.now() - timestamp
};
// 工具：初始化儲存的資料
function storageInit() {
GM_setValue("progress", 0);
GM_setValue("total", -1);
GM_setValue("lastUpdate", Time.now());
}
// 工具：webp 轉 jpg
function webpToJpg(webp) {
let image = new Image();
return new Promise(res => {
image.onload = () => {
let canvas = document.createElement('canvas');
canvas.width = image.width;
canvas.height = image.height;
canvas.getContext('2d').drawImage(image, 0, 0);
canvas.toBlob(blob => res(blob), 'image/jpeg', 0.75);
}
image.src = URL.createObjectURL(webp);
});
}
// 工具：同步 forEach
async function asyncForEach(array, callback) {
for (let index = 0; index < array.length; index++) {
await callback(array[index], index, array);
}
}
// 主頁：控制是否爲選取模式，若是則不觸發連結
function clickProxy(event, selectMode) {
if (selectMode) {
event.preventDefault();
event.stopPropagation();
let a = event.target;
a.classList.toggle("selected");
}
}
// 主頁：下載所有已選，若 retry 爲 true 則只下載失敗的
function downloadSelected(retry = false) {
let allLi, allData;
let progress = document.querySelector("#s_progress");
if (retry) {
allLi = document.querySelectorAll("a li.selected.failed, a li.failed");
allData = [...allLi].map(li => [li.parentElement.getAttribute("title"), li.parentElement.getAttribute("href"), li]);
} else {
allLi = document.querySelectorAll("a li.selected");
allData = [...allLi].map(li => [li.parentElement.getAttribute("title"), li.parentElement.getAttribute("href"), li]);
}
console.log(allData);
asyncForEach(allData, async data => {
storageInit();
GM_setValue("downloading", data[0]);
// 改用彈出式子視窗避免主頁被凍結
let wid = window.open(`https://${Host}${data[1]}`, data[0], "width=800,height=600");
await new Promise((res, rej) => {
let count = 0;
let id = setInterval(() => {
if (GM_getValue("downloading") == "completed") {
clearInterval(id);
res();
} else {
progress.innerText = `${GM_getValue("downloading")}（${GM_getValue("progress")}/${GM_getValue("total")}）`;
}
if (GM_getValue("progress") == GM_getValue("total")) {
progress.innerText = `${GM_getValue("downloading")}（正在壓縮）`;
}
// 判斷超時（ waitSeconds 秒）
if (Time.ago(GM_getValue("lastUpdate")) > waitSeconds * 1000) {
clearInterval(id);
rej();
}
count++;
}, 100);
}).then(() => {
// 下載成功
progress.innerText = `（下載成功）`;
storageInit();
GM_setValue("downloading", undefined);
data[2].classList.remove("selected");
data[2].classList.add("success");
}).catch(() => {
// 超時，判斷爲下載失敗，略過
progress.innerText = `（下載失敗）`;
storageInit();
GM_setValue("downloading", undefined);
data[2].classList.remove("selected");
data[2].classList.add("failed");
});
// 確保子視窗已關閉
wid.close();
});
}
// 單頁：下載
async function downloanThisEpisode(imgs) {
const zip = new JSZip();
const data = document.querySelector("h4").innerText.split("/");
const title = data[0];
const name = data[1].replace(".", "-");
GM_setValue("total", imgs.length);
asyncForEach(imgs, async (img, index) => {
let realSrc = img.getAttribute("data-src");
fetch(`${CORSProxy}${realSrc}`).then(
r => r.blob()
).then(async webp => {
let jpg = await webpToJpg(webp);
zip.file(`${index+1}.jpg`, jpg);
GM_setValue("lastUpdate", Time.now());
GM_setValue("progress", GM_getValue("progress") + 1);
});
});
// 等待上方下載完畢
await new Promise(res => {
let id = setInterval(() => {
// 少數情況會有明明完成了數字卻對不起來的狀況，研判可能是短時間內呼叫 API 有重疊到導致誤差
// 當然也有可能是缺圖，不過由於這個下載器的架構是主頁與個別頁面分開運作，因此很難除錯
// 只好特別另開一個條件容忍了（誤差 <= 3，且上次更新時間是 60 秒前）
if (GM_getValue("progress") == GM_getValue("total") || (GM_getValue("total") - GM_getValue("progress") <= 3 && (Time.ago(GM_getValue("lastUpdate")) > 60 * 1000))) {
clearInterval(id);
res();
};
}, 100);
});
await zip.generateAsync({
type: "base64"
}).then(
base64 => window.location = "data:application/zip;base64," + base64
).then(zip => {
let link = document.createElement('a');
link.setAttribute('href', zip);
link.setAttribute('download', `${title}_${name}`);
link.click();
GM_setValue("downloading", "completed");
}).catch(() => {
GM_setValue("downloading", undefined);
});
window.close();
}
(function () {
'use strict';
GM_addStyle(`.selected { background-color: lightblue; } .success { background-color: lightgreen; } .failed { background-color: pink; }`);
// 提前丟出空請求，確保網站已開機，減少後續等待時間
fetch(CORSProxy);
if (Url.match(/\/comic\/[^\/]+$/)) {
// 特定漫畫選擇話次頁
let selectMode = false;
let id = setInterval(() => {
let episodeList = document.querySelectorAll("[role='tabpanel'] ul");
let buttonAdded = false;
if (episodeList.length == 0)
return;
else
clearInterval(id);
episodeList.forEach(list => {
// 個別清單
if (!buttonAdded) {
// 插入控制按鈕
let field = document.querySelector(".table-default-right");
field.insertAdjacentHTML("afterbegin", `<span style="user-select: none; padding-top: 6px; padding-right: 1rem;"><input type="checkbox" id="cb_changeMode"><label for="cb_changeMode"> 單選模式</label><span style="width: 0.5rem; display: inline-block;"></span><input type="checkbox" id="cb_selectAll"><label for="cb_selectAll"> 全選</label><span style="width: 0.5rem; display: inline-block;"></span><button id="btn_download" disabled>下載選取</button><span style="width: 0.5rem; display: inline-block;"></span><button id="btn_retry" disabled>重試失敗的下載</button><span style="width: 0.5rem; display: inline-block;"></span><span id="s_progress" style="color: darkgreen;">進度訊息（就緒）</span></span>`);
field.querySelector("#btn_download").onclick = () => {
let ok = confirm("請確認 pop-up 的權限已開啓，否則無法正常運作。\n（這個訊息每次都會顯示，無論是否已開啓）");
if (ok) {
field.querySelector("#btn_retry").disabled = false;
downloadSelected();
}
};
field.querySelector("#btn_retry").onclick = () => {
let ok = confirm("請確認 pop-up 的權限已開啓，否則無法正常運作。\n（這個訊息每次都會顯示，無論是否已開啓）");
if (ok) {
downloadSelected(true);
}
};
field.querySelector("#cb_changeMode").onchange = () => {
field.querySelector("#btn_download").disabled = false;
selectMode = !selectMode;
}
field.querySelector("#cb_selectAll").onchange = e => {
field.querySelector("#btn_download").disabled = false;
let checked = e.target.checked;
let episodes = document.querySelectorAll("div[id].active ul.table-all a li");
if (checked) {
episodes.forEach(ep => {
ep.classList.add("selected");
});
} else {
episodes.forEach(ep => {
ep.classList.remove("selected");
});
}
};
buttonAdded = true;
}
list.childNodes.forEach(ep => {
// 個別話次
ep.onclick = e => {
clickProxy(e, selectMode);
};
});
});
}, 100);
} else if (Url.match(/\/comic\/[^\/]+\/chapter\/.+$/)) {
let id = setInterval(() => {
let allImg = document.querySelectorAll(".comicContent-image-list img");
if (allImg.length > 0) {
clearInterval(id);
downloanThisEpisode([...allImg]);
}
}, 100);
}
})();