1 files changed, 100 insertions, 0 deletions
diff --git a/src/cdn/routes/attachments.ts b/src/cdn/routes/attachments.ts
new file mode 100644
index 00000000..723a6c03
--- /dev/null
+++ b/src/cdn/routes/attachments.ts
@@ -0,0 +1,100 @@
+import { Router, Response, Request } from "express";
+import { Config, Snowflake } from "@fosscord/util";
+import { storage } from "../util/Storage";
+import FileType from "file-type";
+import { HTTPError } from "@fosscord/util";
+import { multer } from "../util/multer";
+import imageSize from "image-size";
+
+const router = Router();
+
+const SANITIZED_CONTENT_TYPE = [
+	"text/html",
+	"text/mhtml",
+	"multipart/related",
+	"application/xhtml+xml",
+];
+
+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) throw new HTTPError("file missing");
+
+		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}/${filename}`;
+
+		const endpoint =
+			Config.get()?.cdn.endpointPublic || "http://localhost:3003";
+
+		await storage.set(path, buffer);
+		let width;
+		let height;
+		if (mimetype.includes("image")) {
+			const dimensions = imageSize(buffer);
+			if (dimensions) {
+				width = dimensions.width;
+				height = dimensions.height;
+			}
+		}
+
+		const file = {
+			id,
+			content_type: mimetype,
+			filename: filename,
+			size,
+			url: `${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);
+		let content_type = type?.mime || "application/octet-stream";
+
+		if (SANITIZED_CONTENT_TYPE.includes(content_type)) {
+			content_type = "application/octet-stream";
+		}
+
+		res.set("Content-Type", content_type);
+		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;