:sparkles: cdn

10 files changed, 380 insertions, 0 deletions

diff --git a/cdn/src/Server.ts b/cdn/src/Server.ts
new file mode 100644
index 00000000..1b79b037
--- /dev/null
+++ b/cdn/src/Server.ts
@@ -0,0 +1,68 @@
+import { Server, ServerOptions } from "lambert-server";
+import { Config, db } from "@fosscord/server-util";
+import path from "path";
+import avatarsRoute from "./routes/avatars";
+
+export interface CDNServerOptions extends ServerOptions {}
+
+export class CDNServer extends Server {
+	public options: CDNServerOptions;
+
+	constructor(options?: Partial<CDNServerOptions>) {
+		super(options);
+	}
+
+	async start() {
+		console.log("[Database] connecting ...");
+		// @ts-ignore
+		await (db as Promise<Connection>);
+		await Config.init();
+		console.log("[Database] connected");
+		this.app.use((req, res, next) => {
+			res.set("Access-Control-Allow-Origin", "*");
+			// TODO: use better CSP policy
+			res.set(
+				"Content-security-policy",
+				"default-src *  data: blob: filesystem: about: ws: wss: 'unsafe-inline' 'unsafe-eval'; script-src * data: blob: 'unsafe-inline' 'unsafe-eval'; connect-src * data: blob: 'unsafe-inline'; img-src * data: blob: 'unsafe-inline'; frame-src * data: blob: ; style-src * data: blob: 'unsafe-inline'; font-src * data: blob: 'unsafe-inline';"
+			);
+			res.set("Access-Control-Allow-Headers", req.header("Access-Control-Request-Headers") || "*");
+			res.set("Access-Control-Allow-Methods", req.header("Access-Control-Request-Methods") || "*");
+			next();
+		});
+
+		await this.registerRoutes(path.join(__dirname, "routes/"));
+
+		this.app.use("/icons/", avatarsRoute);
+		this.log("info", "[Server] Route /icons registered");
+
+		this.app.use("/emojis/", avatarsRoute);
+		this.log("info", "[Server] Route /emojis registered");
+
+		this.app.use("/stickers/", avatarsRoute);
+		this.log("info", "[Server] Route /stickers registered");
+
+		this.app.use("/banners/", avatarsRoute);
+		this.log("info", "[Server] Route /banners registered");
+		
+		this.app.use("/splashes/", avatarsRoute);
+		this.log("info", "[Server] Route /splashes registered");
+
+		this.app.use("/app-icons/", avatarsRoute);
+		this.log("info", "[Server] Route /app-icons registered");
+
+		this.app.use("/app-assets/", avatarsRoute);
+		this.log("info", "[Server] Route /app-assets registered");
+
+		this.app.use("/discover-splashes/", avatarsRoute);
+		this.log("info", "[Server] Route /discover-splashes registered");
+
+		this.app.use("/team-icons/", avatarsRoute);
+		this.log("info", "[Server] Route /team-icons registered");
+
+		return super.start();
+	}
+
+	async stop() {
+		return super.stop();
+	}
+}
diff --git a/cdn/src/index.ts b/cdn/src/index.ts
new file mode 100644
index 00000000..7513bd2f
--- /dev/null
+++ b/cdn/src/index.ts
@@ -0,0 +1 @@
+export * from "./Server";
diff --git a/cdn/src/routes/attachments.ts b/cdn/src/routes/attachments.ts
new file mode 100644
index 00000000..c387aa37
--- /dev/null
+++ b/cdn/src/routes/attachments.ts
@@ -0,0 +1,73 @@
+import { Router, Response, Request } from "express";
+import { Config, Snowflake } from "@fosscord/server-util";
+import { storage } from "../util/Storage";
+import FileType from "file-type";
+import { HTTPError } from "lambert-server";
+import { multer } from "../util/multer";
+import imageSize from "image-size";
+
+const router = Router();
+
+router.post("/:channel_id", multer.single("file"), async (req: Request, res: Response) => {
+	if (req.headers.signature !== Config.get().security.requestSignature)
+		throw new HTTPError("Invalid request signature");
+	if (!req.file) return;
+
+	const { buffer, mimetype, size, originalname, fieldname } = req.file;
+	const { channel_id } = req.params;
+	const filename = originalname.replaceAll(" ", "_").replace(/[^a-zA-Z0-9._]+/g, "");
+	const id = Snowflake.generate();
+	const path = `attachments/${channel_id}/${id}/${filename}`;
+
+	const endpoint = Config.get()?.cdn.endpoint || "http://localhost:3003";
+
+	await storage.set(path, buffer);
+	var width;
+	var height;
+	if (mimetype.includes("image")) {
+		const dimensions = imageSize(buffer);
+		if (dimensions) {
+			width = dimensions.width;
+			height = dimensions.height;
+		}
+	}
+
+	const file = {
+		id,
+		content_type: mimetype,
+		filename: filename,
+		size,
+		url: `${endpoint}/${path}`,
+		width,
+		height,
+	};
+
+	return res.json(file);
+});
+
+router.get("/:channel_id/:id/:filename", async (req: Request, res: Response) => {
+	const { channel_id, id, filename } = req.params;
+
+	const file = await storage.get(`attachments/${channel_id}/${id}/${filename}`);
+	if (!file) throw new HTTPError("File not found");
+	const type = await FileType.fromBuffer(file);
+
+	res.set("Content-Type", type?.mime);
+	res.set("Cache-Control", "public, max-age=31536000");
+
+	return res.send(file);
+});
+
+router.delete("/:channel_id/:id/:filename", async (req: Request, res: Response) => {
+	if (req.headers.signature !== Config.get().security.requestSignature)
+		throw new HTTPError("Invalid request signature");
+
+	const { channel_id, id, filename } = req.params;
+	const path = `attachments/${channel_id}/${id}/${filename}`;
+
+	await storage.delete(path);
+
+	return res.send({ success: true });
+});
+
+export default router;
diff --git a/cdn/src/routes/avatars.ts b/cdn/src/routes/avatars.ts
new file mode 100644
index 00000000..60befe2c
--- /dev/null
+++ b/cdn/src/routes/avatars.ts
@@ -0,0 +1,72 @@
+import { Router, Response, Request } from "express";
+import { Config, Snowflake } from "@fosscord/server-util";
+import { storage } from "../util/Storage";
+import FileType from "file-type";
+import { HTTPError } from "lambert-server";
+import { multer } from "../util/multer";
+import crypto from "crypto";
+
+// TODO: check premium and animated pfp are allowed in the config
+// TODO: generate different sizes of icon
+// TODO: generate different image types of icon
+// TODO: delete old icons
+
+const ANIMATED_MIME_TYPES = ["image/apng", "image/gif", "image/gifv"];
+const STATIC_MIME_TYPES = ["image/png", "image/jpeg", "image/webp", "image/svg+xml", "image/svg"];
+const ALLOWED_MIME_TYPES = [...ANIMATED_MIME_TYPES, ...STATIC_MIME_TYPES];
+
+const router = Router();
+
+router.post("/:user_id", multer.single("file"), async (req: Request, res: Response) => {
+	if (req.headers.signature !== Config.get().security.requestSignature)
+		throw new HTTPError("Invalid request signature");
+	if (!req.file) throw new HTTPError("Missing file");
+	const { buffer, mimetype, size, originalname, fieldname } = req.file;
+	const { user_id } = req.params;
+
+	var hash = crypto.createHash("md5").update(Snowflake.generate()).digest("hex");
+
+	const type = await FileType.fromBuffer(buffer);
+	if (!type || !ALLOWED_MIME_TYPES.includes(type.mime)) throw new HTTPError("Invalid file type");
+	if (ANIMATED_MIME_TYPES.includes(type.mime)) hash = `a_${hash}`; // animated icons have a_ infront of the hash
+
+	const path = `avatars/${user_id}/${hash}`;
+	const endpoint = Config.get().cdn.endpoint || "http://localhost:3003";
+
+	await storage.set(path, buffer);
+
+	return res.json({
+		id: hash,
+		content_type: type.mime,
+		size,
+		url: `${endpoint}${req.baseUrl}/${user_id}/${hash}`,
+	});
+});
+
+router.get("/:user_id/:hash", async (req: Request, res: Response) => {
+	var { user_id, hash } = req.params;
+	hash = hash.split(".")[0]; // remove .file extension
+	const path = `avatars/${user_id}/${hash}`;
+
+	const file = await storage.get(path);
+	if (!file) throw new HTTPError("not found", 404);
+	const type = await FileType.fromBuffer(file);
+
+	res.set("Content-Type", type?.mime);
+	res.set("Cache-Control", "public, max-age=31536000");
+
+	return res.send(file);
+});
+
+router.delete("/:user_id/:id", async (req: Request, res: Response) => {
+	if (req.headers.signature !== Config.get().security.requestSignature)
+		throw new HTTPError("Invalid request signature");
+	const { user_id, id } = req.params;
+	const path = `avatars/${user_id}/${id}`;
+
+	await storage.delete(path);
+
+	return res.send({ success: true });
+});
+
+export default router;
diff --git a/cdn/src/routes/external.ts b/cdn/src/routes/external.ts
new file mode 100644
index 00000000..3abe9c22
--- /dev/null
+++ b/cdn/src/routes/external.ts
@@ -0,0 +1,65 @@
+// @ts-nocheck
+import bodyParser from "body-parser";
+import { Router, Response, Request } from "express";
+import fetch from "node-fetch";
+import crypto from "crypto";
+import { HTTPError } from "lambert-server";
+import { Snowflake } from "@fosscord/server-util";
+import { storage } from "../util/Storage";
+
+const router = Router();
+
+type crawled = {
+	id: string;
+	ogTitle: string;
+	ogType: string;
+	ogDescription: string;
+	ogUrl: string;
+	cachedImage: string;
+};
+
+const DEFAULT_FETCH_OPTIONS: any = {
+	redirect: "follow",
+	follow: 1,
+	headers: {
+		"user-agent": "Mozilla/5.0 (compatible; Discordbot/2.0; +https://discordapp.com)",
+	},
+	size: 1024 * 1024 * 8,
+	compress: true,
+	method: "GET",
+};
+
+router.post("/", bodyParser.json(), async (req: Request, res: Response) => {
+	if (req.headers.signature !== Config.get().security.requestSignature)
+		throw new HTTPError("Invalid request signature");
+	if (!req.body) throw new HTTPError("Invalid Body");
+	const { url } = req.body;
+	if (!url || typeof url !== "string") throw new HTTPError("Invalid url");
+
+	const id = Snowflake.generate();
+
+	try {
+		const response = await fetch(ogImage, DEFAULT_FETCH_OPTIONS);
+		const buffer = await response.buffer();
+
+		await storage.set(`/external/${id}`, buffer);
+
+		res.send({ id });
+	} catch (error) {
+		throw new HTTPError("Couldn't fetch website");
+	}
+});
+
+router.get("/:id/", async (req: Request, res: Response) => {
+	const { id } = req.params;
+
+	const file = await storage.get(`/external/${id}`);
+	if (!file) throw new HTTPError("File not found");
+	const result = await FileType.fromBuffer(file);
+
+	res.set("Content-Type", result?.mime);
+
+	return res.send(file);
+});
+
+export default router;
diff --git a/cdn/src/routes/ping.ts b/cdn/src/routes/ping.ts
new file mode 100644
index 00000000..38daf81e
--- /dev/null
+++ b/cdn/src/routes/ping.ts
@@ -0,0 +1,9 @@
+import { Router, Response, Request } from "express";
+
+const router = Router();
+
+router.get("/", (req: Request, res: Response) => {
+	res.send("pong");
+});
+
+export default router;
diff --git a/cdn/src/start.ts b/cdn/src/start.ts
new file mode 100644
index 00000000..57c9f704
--- /dev/null
+++ b/cdn/src/start.ts
@@ -0,0 +1,27 @@
+import path from "path";
+import dotenv from "dotenv";
+import fse from "fs-extra";
+dotenv.config();
+
+if (!process.env.STORAGE_PROVIDER) process.env.STORAGE_PROVIDER = "file";
+// TODO:nodejs path.join trailing slash windows compatible
+if (process.env.STORAGE_PROVIDER === "file") {
+	if (process.env.STORAGE_LOCATION) {
+		if (!process.env.STORAGE_LOCATION.startsWith("/")) {
+			process.env.STORAGE_LOCATION = path.join(__dirname, "..", process.env.STORAGE_LOCATION, "/");
+		}
+	} else {
+		process.env.STORAGE_LOCATION = path.join(__dirname, "..", "files", "/");
+	}
+	fse.ensureDirSync(process.env.STORAGE_LOCATION);
+}
+
+import { CDNServer } from "./Server";
+
+const server = new CDNServer({ port: Number(process.env.PORT) || 3003 });
+server
+	.start()
+	.then(() => {
+		console.log("[Server] started on :" + server.options.port);
+	})
+	.catch((e) => console.error("[Server] Error starting: ", e));
diff --git a/cdn/src/util/FileStorage.ts b/cdn/src/util/FileStorage.ts
new file mode 100644
index 00000000..6e74788f
--- /dev/null
+++ b/cdn/src/util/FileStorage.ts
@@ -0,0 +1,40 @@
+import { Storage } from "./Storage";
+import fs from "fs";
+import fse from "fs-extra";
+import { join, relative, dirname } from "path";
+import "missing-native-js-functions";
+import { Readable } from "stream";
+import ExifTransformer = require("exif-be-gone");
+
+function getPath(path: string) {
+	// STORAGE_LOCATION has a default value in start.ts
+	const root = process.env.STORAGE_LOCATION || "../";
+	var filename = join(root, path);
+
+	if (path.indexOf("\0") !== -1 || !filename.startsWith(root)) throw new Error("invalid path");
+	return filename;
+}
+
+export class FileStorage implements Storage {
+	async get(path: string): Promise<Buffer | null> {
+		try {
+			return fs.readFileSync(getPath(path));
+		} catch (error) {
+			return null;
+		}
+	}
+
+	async set(path: string, value: any) {
+		path = getPath(path);
+		fse.ensureDirSync(dirname(path));
+
+		value = Readable.from(value);
+		const cleaned_file = fs.createWriteStream(path);
+
+		return value.pipe(new ExifTransformer()).pipe(cleaned_file);
+	}
+
+	async delete(path: string) {
+		fs.unlinkSync(getPath(path));
+	}
+}
diff --git a/cdn/src/util/Storage.ts b/cdn/src/util/Storage.ts
new file mode 100644
index 00000000..f8b09e71
--- /dev/null
+++ b/cdn/src/util/Storage.ts
@@ -0,0 +1,15 @@
+import { FileStorage } from "./FileStorage";
+
+export interface Storage {
+	set(path: string, data: Buffer): Promise<void>;
+	get(path: string): Promise<Buffer | null>;
+	delete(path: string): Promise<void>;
+}
+
+var storage: Storage;
+
+if (process.env.STORAGE_PROVIDER === "file") {
+	storage = new FileStorage();
+}
+
+export { storage };
diff --git a/cdn/src/util/multer.ts b/cdn/src/util/multer.ts
new file mode 100644
index 00000000..bfdf6aff
--- /dev/null
+++ b/cdn/src/util/multer.ts
@@ -0,0 +1,10 @@
+import multerConfig from "multer";
+
+export const multer = multerConfig({
+	storage: multerConfig.memoryStorage(),
+	limits: {
+		fields: 10,
+		files: 10,
+		fileSize: 1024 * 1024 * 100, // 100 mb
+	},
+});