rudeshark.net/packages/backend/src/server/file/index.ts

/**
 * File Server
 */

import * as fs from "node:fs";
import { fileURLToPath } from "node:url";
import { dirname } from "node:path";
import Koa from "koa";
import cors from "@koa/cors";
import Router from "@koa/router";
import sendDriveFile from "./send-drive-file.js";

const _filename = fileURLToPath(import.meta.url);
const _dirname = dirname(_filename);

// Init app
const app = new Koa();
app.use(cors());
app.use(async (ctx, next) => {
	ctx.set(
		"Content-Security-Policy",
		`default-src 'none'; img-src 'self'; media-src 'self'; style-src 'unsafe-inline'`,
	);
	await next();
});

// Init router
const router = new Router();

router.get("/app-default.jpg", (ctx) => {
	const file = fs.createReadStream(`${_dirname}/assets/dummy.png`);
	ctx.body = file;
	ctx.set("Content-Type", "image/jpeg");
	ctx.set("Cache-Control", "max-age=31536000, immutable");
});

router.get("/:key", sendDriveFile);
router.get("/:key/(.*)", sendDriveFile);

// Register router
app.use(router.routes());

export default app;