feat: badge-icons cdn route

Author: CyberL1

src/cdn/routes/badge-icons.ts

@@ -0,0 +1,40 @@
+/*
+	Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
+	Copyright (C) 2023 Spacebar and Spacebar Contributors
+	
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU Affero General Public License as published
+	by the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+	
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU Affero General Public License for more details.
+	
+	You should have received a copy of the GNU Affero General Public License
+	along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import { Router, Response, Request } from "express";
+import { storage } from "../util/Storage";
+import FileType from "file-type";
+import { HTTPError } from "lambert-server";
+
+const router = Router();
+
+router.get("/:badge_id", async (req: Request, res: Response) => {
+	const { badge_id } = req.params;
+	const path = `badge-icons/${badge_id}`;
+
+	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, must-revalidate");
+
+	return res.send(file);
+});
+
+export default router;