CodeSnips

typescript

import { Injectable } from '@nestjs/common';

export interface RateLimitResult {
  allowed: boolean;
  remaining: number;
  limit: number;

Sliding-Window Webhook Rate Limiting with a NestJS Interceptor and In-Memory Counter

typescript nestjs rate-limiting

by codesnips 3 tabs

typescript

import { Controller, Sse, Headers } from '@nestjs/common';
import { interval, Observable } from 'rxjs';
import { map } from 'rxjs/operators';

interface FeedPayload {
  id: number;

Streaming Server-Sent Events into a Live React List with an EventSource Hook

react sse eventsource

by codesnips 3 tabs

typescript

import { Type } from 'class-transformer';
import { IsInt, IsOptional, IsString, Max, Min } from 'class-validator';

export class CursorPaginationQuery {
  @IsOptional()
  @IsString()

Cursor-Based Pagination for a TypeORM Repository in NestJS

nestjs typeorm pagination

by codesnips 4 tabs

typescript

import { Injectable } from '@nestjs/common';
import { HealthIndicator, HealthIndicatorResult, HealthCheckError } from '@nestjs/terminus';
import { PrismaService } from '../prisma/prisma.service';

@Injectable()
export class PrismaHealthIndicator extends HealthIndicator {

NestJS Health Checks With Terminus and a Custom Prisma Indicator

nestjs terminus health-checks

by codesnips 3 tabs

typescript

import {
  WebSocketGateway,
  WebSocketServer,
  SubscribeMessage,
  OnGatewayConnection,
  OnGatewayDisconnect,

Room-Based Live Notifications over a NestJS WebSocket Gateway

nestjs websockets socket-io

by codesnips 4 tabs

typescript

import { Exclude, Expose } from 'class-transformer';

export class User {
  id: string;

  firstName: string;

Hide Sensitive Fields in NestJS Responses with class-transformer and ClassSerializerInterceptor

nestjs class-transformer serialization

by codesnips 3 tabs

typescript

import { Module } from '@nestjs/common';
import { BullModule } from '@nestjs/bull';
import { ScheduleModule } from '@nestjs/schedule';
import { DigestProducer } from './digest.producer';
import { DigestProcessor } from './digest.processor';

Scheduling and Processing Email Digests with a Bull Queue in NestJS

nestjs bull redis

by codesnips 3 tabs

typescript

import { AsyncLocalStorage } from 'node:async_hooks';

interface Store {
  requestId: string;
}

Propagate a Request ID Through NestJS Logs with AsyncLocalStorage

nestjs logging middleware

by codesnips 4 tabs

typescript

import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';

async function bootstrap() {
  // rawBody: true preserves the exact bytes Stripe signed
  const app = await NestFactory.create(AppModule, { rawBody: true });

Verify Stripe Webhook Signatures in a NestJS Guard Before the Handler

nestjs webhooks stripe

by codesnips 4 tabs

typescript

import { Injectable, Scope } from '@nestjs/common';
import { DataSource, EntityManager, QueryRunner } from 'typeorm';

@Injectable({ scope: Scope.REQUEST })
export class TransactionContext {
  private queryRunner?: QueryRunner;

Request-Scoped TypeORM QueryRunner Provider for Transactional Writes in NestJS

nestjs typeorm transactions

by codesnips 3 tabs

typescript

import { AxiosError } from 'axios';

export const RETRY_CONFIG = {
  maxRetries: 4,
  baseDelayMs: 200,
  maxDelayMs: 5_000,

Exponential-Backoff Retry Interceptor Around NestJS HttpService

nestjs http retry

by codesnips 3 tabs

typescript

import { SetMetadata } from '@nestjs/common';

export enum Role {
  User = 'user',
  Editor = 'editor',
  Admin = 'admin',

Role-Based Access Control in NestJS with a Custom Guard and @Roles Decorator

nestjs authorization rbac

by codesnips 3 tabs