feat(mangadex): server-side rate-limit 5/s

1 files changed, 12 insertions, 0 deletions

diff --git a/src/lib/rateLimit.ts b/src/lib/rateLimit.ts
new file mode 100644
index 00000000..98e726a2
--- /dev/null
+++ b/src/lib/rateLimit.ts
@@ -0,0 +1,12 @@
+import type { RequestEvent } from '@sveltejs/kit';
+import { RateLimiter } from 'sveltekit-rate-limiter/server';
+
+export const checkRateLimit = async (event: RequestEvent) => {
+	const limiter = new RateLimiter({ rates: { IP: [5, 's'] } });
+
+	await limiter.cookieLimiter?.preflight(event);
+
+	if (await limiter.isLimited(event)) return new Response('rate-limited');
+
+	return null;
+};