codesnips
java 
package com.shop.security;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.access.PermissionEvaluator;
import org.springframework.security.access.expression.method.DefaultMethodSecurityExpressionHandler;

Guard a Checkout Endpoint with @PreAuthorize and a Custom PermissionEvaluator in Spring Boot

spring-boot spring-security authorization
by codesnips 3 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
python 
import json
import secrets
import time
from typing import Optional

import redis.asyncio as redis

Sliding-Window Session Token Expiry With FastAPI Middleware and Redis

fastapi redis sessions
by codesnips 3 tabs
php 
<?php

namespace App\Feature;

use Symfony\Component\HttpFoundation\RequestStack;
use Symfony\Contracts\Service\ResetInterface;

Request-Scoped Feature Flags in Symfony with a Twig Extension and Controller Gate

symfony feature-flags twig
by codesnips 4 tabs
python 
import base64
import json
from datetime import datetime
from typing import Optional, Tuple

Opaque Cursor Pagination for FastAPI Endpoints with SQLAlchemy

fastapi sqlalchemy pagination
by codesnips 3 tabs
javascript 
import { useCallback, useEffect, useState } from 'react';

function parseSearch(search) {
  const params = new URLSearchParams(search);
  const out = {};
  for (const [key, value] of params.entries()) out[key] = value;

Sync React Form State to the URL Query String with a Debounced useSearchParams Hook

react hooks url-state
by codesnips 3 tabs
javascript 
import { useCallback, useEffect, useRef, useState } from 'react';

export function usePaginatedFetch(fetchPage, { pageSize = 20 } = {}) {
  const [items, setItems] = useState([]);
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState(null);

Infinite Scroll in React with IntersectionObserver and a Paginated Fetch Hook

react hooks infinite-scroll
by codesnips 3 tabs
rust 
use std::os::raw::c_int;

pub const LOCK_EX: c_int = 2;
pub const LOCK_NB: c_int = 4;
pub const LOCK_UN: c_int = 8;

RAII File Lock Guard in Rust With Drop-Based Release

rust raii drop
by codesnips 3 tabs
python 
import uuid
from django.db import models


class Cart(models.Model):
    OPEN = "open"

Prevent Duplicate Order Submissions in Django with select_for_update Row Locking

django postgres concurrency
by codesnips 3 tabs
typescript 
import { useMemo } from "react";

export type SortDir = "asc" | "desc";
export interface SortConfig<T> {
  key: keyof T;
  dir: SortDir;

Memoized Async Search With a Cached Selector Hook in React

react hooks usememo
by codesnips 3 tabs
java 
package com.example.auth.dto;

import jakarta.validation.constraints.Email;
import jakarta.validation.constraints.NotBlank;
import jakarta.validation.constraints.Pattern;
import jakarta.validation.constraints.Size;

Collect Bean Validation Field Errors in a Spring Boot Signup Endpoint

spring-boot bean-validation jakarta-validation
by codesnips 3 tabs
java 
package com.example.fx.config;

import com.github.benmanes.caffeine.cache.Caffeine;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.caffeine.CaffeineCacheManager;

Caching Currency-Conversion Rates in Spring Boot With @Cacheable and Scheduled Eviction

spring-boot caching caffeine
by codesnips 3 tabs