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openhands committed 2026-07-13 21:57:41 +02:00
1 parent 8efd032cc6
commit df38dccbf1
735 files changed
+128321 -120870
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src/lib/rate-limit.ts
+66 -54
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@@ -5,8 +5,8 @@ type Bucket = { count: number; resetAt: number };
const buckets = new Map<string, Bucket>();
export interface RateLimitResult {
ok: boolean;
retryAfter: number;
ok: boolean;
retryAfter: number;
}
const CLEANUP_INTERVAL_MS = 300_000;
@@ -15,69 +15,81 @@ const MAX_BUCKETS = 10_000;
let lastCleanup = Date.now();
function cleanup(): void {
const now = Date.now();
if (now - lastCleanup < CLEANUP_INTERVAL_MS) return;
lastCleanup = now;
const now = Date.now();
if (now - lastCleanup < CLEANUP_INTERVAL_MS) return;
lastCleanup = now;
for (const [k, b] of buckets) {
if (now >= b.resetAt) buckets.delete(k);
}
for (const [k, b] of buckets) {
if (now >= b.resetAt) buckets.delete(k);
}
if (buckets.size > MAX_BUCKETS) {
const sorted = [...buckets.entries()].sort((a, b) => a[1].resetAt - b[1].resetAt);
const keysToRemove = sorted.slice(0, Math.floor(sorted.length * 0.2)).map((entry) => entry[0]);
for (const key of keysToRemove) buckets.delete(key);
}
if (buckets.size > MAX_BUCKETS) {
const sorted = [...buckets.entries()].sort(
(a, b) => a[1].resetAt - b[1].resetAt,
);
const keysToRemove = sorted
.slice(0, Math.floor(sorted.length * 0.2))
.map((entry) => entry[0]);
for (const key of keysToRemove) buckets.delete(key);
}
}
export async function rateLimit(key: string, limit: number, windowMs: number): Promise<RateLimitResult> {
const now = Date.now();
export async function rateLimit(
key: string,
limit: number,
windowMs: number,
): Promise<RateLimitResult> {
const now = Date.now();
if (redis) {
try {
const windowKey = `ratelimit:${key}`;
const current = await redis.incr(windowKey);
if (current === 1) await redis.pexpire(windowKey, windowMs);
const ttl = current === 1 ? windowMs : Math.max(0, await redis.pttl(windowKey));
if (current > limit) {
return { ok: false, retryAfter: Math.ceil(ttl / 1000) };
}
return { ok: true, retryAfter: 0 };
} catch {
// Redis unavailable — fall through to in-memory
}
}
if (redis) {
try {
const windowKey = `ratelimit:${key}`;
const current = await redis.incr(windowKey);
if (current === 1) await redis.pexpire(windowKey, windowMs);
const ttl =
current === 1 ? windowMs : Math.max(0, await redis.pttl(windowKey));
if (current > limit) {
return { ok: false, retryAfter: Math.ceil(ttl / 1000) };
}
return { ok: true, retryAfter: 0 };
} catch {
// Redis unavailable — fall through to in-memory
}
}
cleanup();
cleanup();
const windowKey = `mem:${key}`;
const bucket = buckets.get(windowKey);
const windowKey = `mem:${key}`;
const bucket = buckets.get(windowKey);
if (!bucket || now >= bucket.resetAt) {
buckets.set(windowKey, { count: 1, resetAt: now + windowMs });
return { ok: true, retryAfter: 0 };
}
if (!bucket || now >= bucket.resetAt) {
buckets.set(windowKey, { count: 1, resetAt: now + windowMs });
return { ok: true, retryAfter: 0 };
}
const newCount = bucket.count + 1;
if (newCount > limit) {
return { ok: false, retryAfter: Math.max(1, Math.ceil((bucket.resetAt - now) / 1000)) };
}
const newCount = bucket.count + 1;
if (newCount > limit) {
return {
ok: false,
retryAfter: Math.max(1, Math.ceil((bucket.resetAt - now) / 1000)),
};
}
bucket.count = newCount;
return { ok: true, retryAfter: 0 };
bucket.count = newCount;
return { ok: true, retryAfter: 0 };
}
export async function clientIp(): Promise<string> {
try {
const h = await headers();
return (
h.get("x-real-client-ip") ??
h.get("cf-connecting-ip") ??
h.get("x-forwarded-for")?.split(",")[0]?.trim() ??
h.get("x-real-ip") ??
"0.0.0.0"
);
} catch {
return "0.0.0.0";
}
try {
const h = await headers();
return (
h.get("x-real-client-ip") ??
h.get("cf-connecting-ip") ??
h.get("x-forwarded-for")?.split(",")[0]?.trim() ??
h.get("x-real-ip") ??
"0.0.0.0"
);
} catch {
return "0.0.0.0";
}
}