indieseas/worker.js at main · nuhuhhuuh/indieseas · GitHub

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import { parse } from "node-html-parser";

export default {
	async fetch(request, env, ctx) {
		let url = new URL(request.url);

		const apiKey = url.searchParams.get("key");
		if (apiKey !== env.API_KEY) {
			return new Response("Unauthorized: Invalid API key", {
				status: 401,
			});
		}
		let name = url.searchParams.get("path");
		if (!name) return new Response("No URL to scrape detected.");

		if (name.startsWith("http://") || name.startsWith("https://")) {
			name = new URL(name).href;
		} else {
			name = `https://${name}`;
		}
		const answer = await fetch(name);

		if (!answer)
			return new Response(`Failed to fetch: ${name}`, { status: 500 });
		if (!answer.ok)
			return new Response(`Failed to fetch: ${name}`, { status: 500 });

		let foundButtons = {};
		const answerText = await answer.text();

		const root = parse(answerText, {
			fixNestedATags: false,
			parseNoneClosedTags: false,
			blockTextElements: {
				script: false,
				noscript: false,
				style: false,
				pre: false,
				textarea: false,
				document: false,
			},
			comment: false,
			ignoreWhitespace: true,
			normalizeWhitespace: true,
			trimWhitespace: true,
			upperCaseTagName: false,
			lowerCaseTagName: false,
		});
		const images = root.querySelectorAll("img");
		for (const img of images) {
			if (!img) continue;
			const imgSrc = img.getAttribute("src");
			if (!imgSrc) continue;

			var src = imgSrc;
			if (
				src &&
				!src.startsWith("http://") &&
				!src.startsWith("https://")
			) {
				src = new URL(src, name).href;
			}

			let links_to = null;
			const parentAnchor = img.closest("a");
			if (parentAnchor && parentAnchor.getAttribute("href")) {
				const href = parentAnchor.getAttribute("href");
				try {
					if (
						!href.startsWith("http://") &&
						!href.startsWith("https://")
					) {
						if (href.startsWith("/")) {
							links_to = new URL(href, name).href;
						} else {
							links_to = `https://${href}`;
						}
					} else {
						links_to = href;
					}
				} catch (error) {
					links_to = href;
				}
			}

			const imgAlt = img.getAttribute("alt");
			const imgTitle = img.getAttribute("title");

			if (!foundButtons.buttons) {
				foundButtons.buttons = [];
			}
			foundButtons.buttons.push({
				src: src,
				links_to: links_to,
				alt: imgAlt,
				title: imgTitle,
			});
		}

		let allText = root.text || "";
		allText = allText.replace(/\n/g, " ");s
		allText = allText.replace(/\r/g, " ");
		allText = allText.replace(/<\/?[^>]+(>|$)/g, " $& ");
		allText = allText.replace(/ +/g, " ");
		allText = allText
			.replace(/<[^>]+>/g, " ")
			.trim()
			.toLowerCase();

		return new Response(
			JSON.stringify({
				buttons: foundButtons.buttons || [],
				title: root.querySelector("title")?.text,
				description: root
					.querySelector("meta[name='description']")
					?.getAttribute("content"),
				keywords: root
					.querySelector("meta[name='keywords']")
					?.getAttribute("content"),
				meta: root.querySelector("meta")?.getAttribute("content"),
				rawText: allText,
				links: root.querySelectorAll("a").map(function (a) {
					return {
						href: a.getAttribute("href"),
						text: a.text,
					};
				}),
			}) || {},
			{
				status: 200,
				headers: {
					"Content-Type": "application/json",
					"Access-Control-Allow-Origin": "*",
				},
			}
		);
	},
};