spec(aiscript): Mk:apiの呼び出しにエンドポイントごとのレートリミットを設定 (MisskeyIO#522)

package.json

@@ -46,17 +46,17 @@
 		"cleanall": "pnpm clean-all"
 	},
 	"resolutions": {
+		"@tensorflow/tfjs-core": "4.17.0",
 		"chokidar": "3.6.0",
 		"lodash": "4.17.21",
-		"sharp": "0.33.2",
-		"@tensorflow/tfjs-core": "4.17.0"
+		"sharp": "0.33.2"
 	},
 	"dependencies": {
 		"cssnano": "6.1.0",
 		"execa": "8.0.1",
 		"js-yaml": "4.1.0",
 		"postcss": "8.4.35",
-		"terser": "5.29.1",
+		"terser": "5.29.2",
 		"typescript": "5.4.2"
 	},
 	"devDependencies": {

packages/backend/package.json

@@ -66,8 +66,8 @@
 	},
 	"dependencies": {
 		"@authenio/samlify-node-xmllint": "2.0.0",
-		"@aws-sdk/client-s3": "3.533.0",
-		"@aws-sdk/lib-storage": "3.533.0",
+		"@aws-sdk/client-s3": "3.534.0",
+		"@aws-sdk/lib-storage": "3.534.0",
 		"@bull-board/api": "5.15.1",
 		"@bull-board/fastify": "5.15.1",
 		"@bull-board/ui": "5.15.1",
@@ -89,7 +89,7 @@
 		"@peertube/http-signature": "1.7.0",
 		"@simplewebauthn/server": "9.0.3",
 		"@sinonjs/fake-timers": "11.2.2",
-		"@smithy/node-http-handler": "2.4.3",
+		"@smithy/node-http-handler": "2.5.0",
 		"@swc/cli": "0.1.65",
 		"@swc/core": "1.3.107",
 		"@twemoji/parser": "15.0.0",

packages/frontend/package.json

@@ -19,6 +19,7 @@
 	"dependencies": {
 		"@discordapp/twemoji": "15.0.2",
 		"@github/webauthn-json": "2.1.1",
+		"@isaacs/ttlcache": "1.4.1",
 		"@mcaptcha/vanilla-glue": "0.1.0-alpha-3",
 		"@misskey-dev/browser-image-resizer": "2024.1.0",
 		"@rollup/plugin-json": "6.1.0",

packages/frontend/src/scripts/aiscript/api.ts

@@ -11,6 +11,7 @@ import { miLocalStorage } from '@/local-storage.js';
 import { customEmojis } from '@/custom-emojis.js';
 import { url, lang } from '@/config.js';
 import { nyaize } from '@/scripts/nyaize.js';
+import { RateLimiter } from '@/scripts/rate-limiter.js';
 
 export function aiScriptReadline(q: string): Promise<string> {
 	return new Promise(ok => {
@@ -23,6 +24,8 @@ export function aiScriptReadline(q: string): Promise<string> {
 }
 
 export function createAiScriptEnv(opts) {
+	const rateLimiter = new RateLimiter<string>({ duration: 1000 * 15, max: 30 });
+
 	return {
 		USER_ID: $i ? values.STR($i.id) : values.NULL,
 		USER_NAME: $i ? values.STR($i.name) : values.NULL,
@@ -55,6 +58,7 @@ export function createAiScriptEnv(opts) {
 				if (typeof token.value !== 'string') throw new Error('invalid token');
 			}
 			const actualToken: string|null = token?.value ?? opts.token ?? null;
+			if (!rateLimiter.hit(ep.value)) return values.ERROR('rate_limited', values.NULL);
 			return misskeyApi(ep.value, utils.valToJs(param), actualToken).then(res => {
 				return utils.jsToVal(res);
 			}, err => {

packages/frontend/src/scripts/rate-limiter.ts

@@ -0,0 +1,71 @@
+/*
+ * SPDX-FileCopyrightText: Isaac Z. Schlueter and Contributors of https://github.com/isaacs/ttlcache
+ * SPDX-License-Identifier: ISC
+ *
+ * This file is derived from the project that has licensed under the ISC license.
+ * This file SHOULD NOT be considered as a part of the this project that has licensed under AGPL-3.0-only
+ * Adapted from https://github.com/isaacs/ttlcache/blob/b6002f971e122e3b35e23d00ac6a8365d505c14d/examples/rate-limiter-window.ts
+ */
+
+import TTLCache from '@isaacs/ttlcache';
+import type { Options as TTLCacheOptions } from '@isaacs/ttlcache';
+
+export interface Options {
+	duration: number;
+	max: number;
+}
+
+interface RLEntryOptions extends TTLCacheOptions<number, boolean> {
+	onEmpty: () => void;
+}
+
+class RLEntry extends TTLCache<number, boolean> {
+	onEmpty: () => void;
+
+	constructor(options: RLEntryOptions) {
+		super(options);
+		this.onEmpty = options.onEmpty;
+	}
+
+	purgeStale() {
+		const ret = super.purgeStale();
+		if (this.size === 0 && ret) {
+			this.onEmpty();
+		}
+		return ret;
+	}
+}
+
+export class RateLimiter<K> extends Map<K, TTLCache<number, boolean>> {
+	duration: number;
+	max: number;
+
+	constructor(options: Options) {
+		super();
+		this.duration = options.duration;
+		this.max = options.max;
+	}
+
+	hit(key: K) {
+		const c =
+			super.get(key) ??
+			new RLEntry({
+				ttl: this.duration,
+				onEmpty: () => this.delete(key),
+			});
+
+		this.set(key, c);
+
+		if (c.size > this.max) {
+			// rejected, too many hits within window
+			return false;
+		}
+		c.set(performance.now(), true);
+		return true;
+	}
+
+	count(key: K) {
+		const c = super.get(key);
+		return c ? c.size : 0;
+	}
+}

packages/misskey-bubble-game/package.json

@@ -38,7 +38,7 @@
 		"built"
 	],
 	"dependencies": {
-		"esbuild": "0.20.1",
+		"esbuild": "0.20.2",
 		"eventemitter3": "5.0.1",
 		"glob": "^10.3.10",
 		"matter-js": "0.19.0",

packages/misskey-reversi/package.json

@@ -34,7 +34,7 @@
 	},
 	"dependencies": {
 		"crc-32": "1.2.2",
-		"esbuild": "0.20.1",
+		"esbuild": "0.20.2",
 		"glob": "10.3.10"
 	},
 	"files": [

packages/sw/package.json

@@ -9,7 +9,7 @@
 		"lint": "pnpm typecheck && pnpm eslint"
 	},
 	"dependencies": {
-		"esbuild": "0.20.1",
+		"esbuild": "0.20.2",
 		"idb-keyval": "6.2.1",
 		"misskey-js": "workspace:*"
 	},