示例
express-rate-limit 8.6.2: MemoryStore
已验证示例 — npm express-rate-limit 8.6.2: MemoryStore. contract 在 node 22 · linux debian/x64 · docker 上运行并通过： MemoryStore initializes with windowMs and sets…
sha256:cb8664f79e1586e70c327da550f7c59e76f93741e08795b3cc6de107f34a3607
本网络只提供一件事：能构建的样本。它在沙箱中运行并保留签名回执。它不评级、不担保——同样的代码能否在你的环境构建，它没有测量过。
提交了通过的契约回执的不同签名密钥数量。为 1 表示只有作者；大于 1 表示还有其他人构建过。密钥是自行生成的，背后没有注册身份，因此计的是密钥而非人。
MIT-0
执行证据
声明的环境与签名的运行分开呈现，你可以看到这个样本究竟运行了什么、在哪里运行。
- 证据依据
- 签名契约通过
- 验证回执
- 1
- 构建过它的签名密钥
- 1
声明的环境
linux 24 · ubuntu · glibc 2.39 x64 npm
验证运行环境
| 环境 | 契约 | 阶段 | 运行日期 |
|---|---|---|---|
| node 22 · linux debian/x64 · docker ed25519:c1973797be207ac4 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1node:22@sha256:8a34c4ab3ea2… |
2026-09-07 |
案例
HOW- 目标
- verify express-rate-limit.MemoryStore in pkg:npm/express-rate-limit@8.6.2
- 符号
-
- express-rate-limit.MemoryStore
- 创建时间
- 2026-09-07T03:33:29Z
契约
- MemoryStore initializes with windowMs and sets localKeys flag to true
- MemoryStore increment records hits and returns totalHits count and resetTime Date
- MemoryStore get retrieves hit count and resetTime for active keys and returns undefined for unknown keys
- MemoryStore decrement reduces totalHits without dropping below zero
- MemoryStore resetKey clears hit records for a specific key
- MemoryStore resetAll clears hit records for all keys
- MemoryStore resets totalHits when incremented after windowMs expiration
- MemoryStore shutdown stops internal timers and resets all stored keys
- MemoryStore integrates seamlessly as the store option for rateLimit middleware
文件
- PROMPT.md
- csx.json
- package-lock.json
- package.json
- spec.json
- src/index.mjs
- test/contract.mjs
源代码
Clean-room public code sample — generation instructions
Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.
A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.
Goal: verify express-rate-limit.MemoryStore in pkg:npm/express-rate-limit@8.6.2
Kind: HOW
Use EXACTLY these public packages and versions:
- pkg:npm/express-rate-limit@8.6.2
Demonstrate these symbols/APIs:
- express-rate-limit.MemoryStore
Rules:
- One focused purpose; the smallest project that proves the goal.
- Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
- Pin every dependency with a lockfile so resolution is reproducible.
- No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
- No personal names, emails, company names, or project identifiers of any kind.
- No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
- Keep it under 200 files and 256KB packed.
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"license": "ISC",
"peer": true
}
}
}
{
"name": "sample-express-rate-limit-memorystore",
"version": "1.0.0",
"type": "module",
"private": true,
"license": "MIT-0",
"scripts": {
"test": "node test/contract.mjs"
},
"dependencies": {
"express-rate-limit": "8.6.2"
}
}
{
"schemaVersion": 1,
"goal": "verify express-rate-limit.MemoryStore in pkg:npm/express-rate-limit@8.6.2",
"kind": "HOW",
"packages": [
"pkg:npm/express-rate-limit@8.6.2"
],
"symbols": [
"express-rate-limit.MemoryStore"
]
}
import { MemoryStore, rateLimit } from 'express-rate-limit';
/**
* Creates and initializes an express-rate-limit MemoryStore instance.
* @param {number} [windowMs=60000] - Time window in milliseconds.
* @returns {MemoryStore} Initialized MemoryStore instance.
*/
export function createMemoryStore(windowMs = 60000) {
const store = new MemoryStore();
store.init({ windowMs });
return store;
}
/**
* Increments the hit count for a specific key in the store.
* @param {MemoryStore} store
* @param {string} key
* @returns {Promise<{ totalHits: number, resetTime: Date }>}
*/
export async function recordHit(store, key) {
return await store.increment(key);
}
/**
* Retrieves the rate limit info for a key.
* @param {MemoryStore} store
* @param {string} key
* @returns {Promise<{ totalHits: number, resetTime: Date } | undefined>}
*/
export async function getHitInfo(store, key) {
return await store.get(key);
}
/**
* Decrements the hit count for a key.
* @param {MemoryStore} store
* @param {string} key
* @returns {Promise<void>}
*/
export async function decrementHit(store, key) {
await store.decrement(key);
}
/**
* Resets a single key in the store.
* @param {MemoryStore} store
* @param {string} key
* @returns {Promise<void>}
*/
export async function resetKey(store, key) {
await store.resetKey(key);
}
/**
* Resets all keys in the store.
* @param {MemoryStore} store
* @returns {Promise<void>}
*/
export async function resetAllKeys(store) {
await store.resetAll();
}
/**
* Creates an express-rate-limit middleware configured with an explicit MemoryStore.
* @param {Object} options
* @param {number} [options.windowMs=60000]
* @param {number} [options.limit=5]
* @param {MemoryStore} [options.store]
* @returns {Function} Express middleware function.
*/
export function createLimiterWithMemoryStore(options = {}) {
const windowMs = options.windowMs || 60000;
const store = options.store || createMemoryStore(windowMs);
return rateLimit({
windowMs,
limit: options.limit || 5,
store,
validate: false,
...options,
});
}
export { MemoryStore, rateLimit };
export default MemoryStore;
import assert from 'node:assert/strict';
import {
MemoryStore,
createMemoryStore,
recordHit,
getHitInfo,
decrementHit,
resetKey,
resetAllKeys,
createLimiterWithMemoryStore,
rateLimit
} from '../src/index.mjs';
function createMockReq(options = {}) {
return {
ip: options.ip || '127.0.0.1',
path: options.path || '/',
headers: options.headers || {},
get(name) {
return this.headers[name.toLowerCase()] || '';
},
...options
};
}
function createMockRes() {
return {
statusCode: 200,
headers: {},
body: undefined,
ended: false,
setHeader(name, value) {
this.headers[name.toLowerCase()] = String(value);
return this;
},
getHeader(name) {
return this.headers[name.toLowerCase()];
},
status(code) {
this.statusCode = code;
return this;
},
send(body) {
this.body = body;
this.ended = true;
return this;
}
};
}
function runMiddleware(middleware, req, res) {
return new Promise((resolve) => {
let nextCalled = false;
const next = (err) => {
nextCalled = true;
resolve({ nextCalled, err });
};
Promise.resolve(middleware(req, res, next)).then(() => {
if (!nextCalled && res.ended) {
resolve({ nextCalled: false });
}
});
});
}
// 1. MemoryStore initializes with windowMs and sets localKeys flag to true
{
const store = createMemoryStore(60000);
assert.equal(store.localKeys, true);
assert.equal(store.windowMs, 60000);
store.shutdown();
}
// 2. MemoryStore increment records hits and returns totalHits count and resetTime Date
{
const store = createMemoryStore(60000);
const result1 = await recordHit(store, 'user-1');
assert.equal(result1.totalHits, 1);
assert.ok(result1.resetTime instanceof Date);
const initialResetTime = result1.resetTime.getTime();
const result2 = await recordHit(store, 'user-1');
assert.equal(result2.totalHits, 2);
assert.equal(result2.resetTime.getTime(), initialResetTime);
store.shutdown();
}
// 3. MemoryStore get retrieves hit count and resetTime for active keys and returns undefined for unknown keys
{
const store = createMemoryStore(60000);
await recordHit(store, 'user-2');
const info = await getHitInfo(store, 'user-2');
assert.ok(info !== undefined);
assert.equal(info.totalHits, 1);
assert.ok(info.resetTime instanceof Date);
const unknownInfo = await getHitInfo(store, 'unknown-user');
assert.equal(unknownInfo, undefined);
store.shutdown();
}
// 4. MemoryStore decrement reduces totalHits without dropping below zero
{
const store = createMemoryStore(60000);
await recordHit(store, 'user-3');
await recordHit(store, 'user-3');
assert.equal((await getHitInfo(store, 'user-3')).totalHits, 2);
await decrementHit(store, 'user-3');
assert.equal((await getHitInfo(store, 'user-3')).totalHits, 1);
await decrementHit(store, 'user-3');
assert.equal((await getHitInfo(store, 'user-3')).totalHits, 0);
// Decrementing when totalHits is 0 should not go negative
await decrementHit(store, 'user-3');
assert.equal((await getHitInfo(store, 'user-3')).totalHits, 0);
store.shutdown();
}
// 5. MemoryStore resetKey clears hit records for a specific key
{
const store = createMemoryStore(60000);
await recordHit(store, 'key-a');
await recordHit(store, 'key-b');
await resetKey(store, 'key-a');
assert.equal(await getHitInfo(store, 'key-a'), undefined);
assert.equal((await getHitInfo(store, 'key-b')).totalHits, 1);
store.shutdown();
}
// 6. MemoryStore resetAll clears hit records for all keys
{
const store = createMemoryStore(60000);
await recordHit(store, 'key-1');
await recordHit(store, 'key-2');
await resetAllKeys(store);
assert.equal(await getHitInfo(store, 'key-1'), undefined);
assert.equal(await getHitInfo(store, 'key-2'), undefined);
store.shutdown();
}
// 7. MemoryStore resets totalHits when incremented after windowMs expiration
{
const store = createMemoryStore(50);
const first = await recordHit(store, 'short-lived');
assert.equal(first.totalHits, 1);
const firstResetTime = first.resetTime.getTime();
await new Promise((r) => setTimeout(r, 70));
const afterExpiry = await recordHit(store, 'short-lived');
assert.equal(afterExpiry.totalHits, 1);
assert.ok(afterExpiry.resetTime.getTime() > firstResetTime);
store.shutdown();
}
// 8. MemoryStore shutdown stops internal timers and resets all stored keys
{
const store = createMemoryStore(60000);
await recordHit(store, 'shutdown-key');
assert.equal((await getHitInfo(store, 'shutdown-key')).totalHits, 1);
store.shutdown();
assert.equal(await getHitInfo(store, 'shutdown-key'), undefined);
}
// 9. MemoryStore integrates seamlessly as the store option for rateLimit middleware
{
const store = createMemoryStore(60000);
const limiter = createLimiterWithMemoryStore({
limit: 2,
windowMs: 60000,
store
});
const req1 = createMockReq({ ip: '10.10.10.1' });
const res1 = createMockRes();
const res1Status = await runMiddleware(limiter, req1, res1);
assert.equal(res1Status.nextCalled, true);
assert.equal(res1.statusCode, 200);
const req2 = createMockReq({ ip: '10.10.10.1' });
const res2 = createMockRes();
const res2Status = await runMiddleware(limiter, req2, res2);
assert.equal(res2Status.nextCalled, true);
const req3 = createMockReq({ ip: '10.10.10.1' });
const res3 = createMockRes();
const res3Status = await runMiddleware(limiter, req3, res3);
assert.equal(res3Status.nextCalled, false);
assert.equal(res3.statusCode, 429);
store.shutdown();
}
console.log('Contract assertions passed.');
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