ComicWalkerRipper

Download Images From Comic-Walker
当前为 2025-05-03 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name        ComicWalkerRipper
// @namespace   adrian
// @author      adrian
// @match       https://comic-walker.com/detail/*/episodes/*
// @version     1.0
// @description Download Images From Comic-Walker
// @require     https://cdn.jsdelivr.net/npm/@violentmonkey/shortcut@1
// @require     https://unpkg.com/@zip.js/[email protected]/dist/zip-full.min.js
// @grant       GM_registerMenuCommand
// @license     MIT
// ==/UserScript==

const createKey = (hash) => {
	const parts = hash.slice(0, 16).match(/[\da-f]{2}/gi);
	return new Uint8Array(parts.map((data) => Number.parseInt(data, 16)));
};

function createXorFunc(key) {
	return (image) => {
		const { length: imageLength } = image;
		const { length: keyLength } = key;
		const decrypted = new Uint8Array(imageLength);
		for (let index = 0; index < imageLength; index += 1)
			decrypted[index] = image[index] ^ key[index % keyLength];
		return decrypted;
	};
}

const downloadImages = async () => {
	const progressBar = document.createElement("div");
	progressBar.id = "dl-progress";
	progressBar.textContent = "Starting...";
	progressBar.style.padding = "20px";
	progressBar.style.backgroundColor = "black";
	progressBar.style.borderRadius = "10px";
	progressBar.style.border = "1px solid white";
	progressBar.style.boxShadow = "0 25px 50px -12px rgb(0 0 0 / 0.25)";
	progressBar.style.position = "fixed";
	progressBar.style.left = "50%";
	progressBar.style.top = "50%";
	progressBar.style.transform = "translate(-50%,-50%)";
	progressBar.style.zIndex = "9999";
	progressBar.style.fontSize = "20px";
	progressBar.style.color = "white";
	document.body.appendChild(progressBar);
	const currentUrl = window.location.href;
	const parser = new DOMParser();
	const fetchedHTML = await fetch(currentUrl).then((res) => res.text());
	const doc = parser.parseFromString(fetchedHTML, "text/html");

	const nextData = JSON.parse(doc.getElementById("__NEXT_DATA__").text);
	let episodeId;
	for (const query of nextData.props.pageProps.dehydratedState.queries) {
		if (query.queryKey[0] === "/api/contents/details/episode") {
			episodeId = query.state.data.episode.id;
		}
	}

	if (!episodeId) {
		progressBar.textContent = "unable to find episodeId.";
		setTimeout(() => progressBar.remove(), 1000);
	}
	console.log(episodeId);

	const apiData = await fetch(
		`https://comic-walker.com/api/contents/viewer?episodeId=${episodeId}&imageSizeType=width:1284`,
	).then((res) => res.json());

	const images = apiData.manuscripts;
	console.log(images);
	progressBar.textContent = `${images.length} images found.`;
	const zipWriter = new zip.ZipWriter(new zip.BlobWriter("application/zip"), {
		bufferedWrite: true,
	});
	for (let i = 0; i < images.length; i++) {
		const image = images[i];
		const xorKey = createKey(image.drmHash);
		const xorFunc = createXorFunc(xorKey);
		const response = await fetch(image.drmImageUrl);
		if (!response.ok) {
			progressBar.textContent = `failed to fetch image ${i + 1}/${images.length}`;
			throw new Error("Failed to fetch image");
		}
		const arrayBuffer = await response.arrayBuffer();
		const decryptedData = xorFunc(new Uint8Array(arrayBuffer));
		zipWriter.add(`${i + 1}.webp`, new zip.Uint8ArrayReader(decryptedData), {});
		progressBar.textContent = `fetched and decrypted image ${i + 1}/${images.length}`;
		console.log("done with ", i + 1);
	}
	console.log("image fetching done. generating zip");
	progressBar.textContent = "image fetching done. generating zip";
	const blobURL = URL.createObjectURL(await zipWriter.close());
	const link = document.createElement("a");
	link.href = blobURL;
	link.download = `${document.title}.zip`;
	link.click();
	progressBar.textContent = "done.";
	setTimeout(() => progressBar.remove(), 1000);
};

VM.shortcut.register("cm-s", downloadImages);
VM.shortcut.enable();

GM_registerMenuCommand("Download Images (Ctrl/Cmd + S)", downloadImages);