Code Explainers

Code explainers tagged #authentication

typescript 
import { inject } from '@angular/core';
import {
  ActivatedRouteSnapshot,
  CanActivateFn,

How a functional route guard works in Angular

route-guards dependency-injection rxjs
Intermediate 5 steps
javascript 
const express = require('express');
const session = require('express-session');
const RedisStore = require('connect-redis').default;
const { createClient } = require('redis');

Redis-backed session auth in Express

sessions authentication redis
Intermediate 8 steps
rust 
use axum::{
    async_trait,
    extract::{FromRequestParts, State},
    http::{header, request::Parts, StatusCode},

Custom auth extractors in Axum

extractors authentication error-handling
Intermediate 9 steps
typescript 
import { Injectable } from '@angular/core';
import {
  HttpInterceptor,
  HttpHandler,

Refreshing tokens with an Angular HttpInterceptor

http-interceptor token-refresh rxjs
Advanced 8 steps
python 
import os
from datetime import datetime, timezone
 
import jwt

JWT bearer auth as a FastAPI dependency

authentication jwt dependency-injection
Intermediate 7 steps
go 
package middleware
 
import (
	"crypto/subtle"

Building an API-key middleware in Gin

middleware authentication dependency-injection
Intermediate 5 steps
go 
package api
 
func RegisterRoutes(r *gin.Engine, deps *Dependencies) {
	r.GET("/health", func(c *gin.Context) {

Layering route groups and middleware in Gin

routing middleware authentication
Intermediate 8 steps
php 
<?php
 
namespace App\Services;
 

Building signed, expiring download URLs in PHP in Laravel

hmac url-signing authentication
Intermediate 7 steps
go 
package middleware
 
import (
	"bytes"

Verifying webhook HMAC signatures in Gin

hmac middleware webhooks
Intermediate 7 steps
typescript 
import {
  createParamDecorator,
  ExecutionContext,
  UnauthorizedException,

Building a @CurrentUser decorator in NestJS

decorators authentication request-context
Intermediate 6 steps
rust 
use axum::{
    body::Bytes,
    extract::State,
    http::{HeaderMap, StatusCode},

Verifying Stripe webhook signatures in Axum

hmac webhooks constant-time-comparison
Intermediate 8 steps
php 
<?php
 
namespace App\Http\Controllers\Auth;
 

Rate-limited login in Laravel

authentication rate-limiting validation
Intermediate 9 steps
rust 
use axum::{
    body::Body,
    extract::Request,
    http::{header, StatusCode},

How bearer-auth middleware works in Axum

middleware authentication request extensions
Intermediate 7 steps
go 
package auth
 
import (
	"net/http"

Building a JWT auth middleware in Gin

middleware jwt authentication
Intermediate 7 steps
rust 
use axum::{
    extract::FromRef,
    http::StatusCode,
    response::{IntoResponse, Redirect},

Signed cookie sessions in Axum

sessions cookies authentication
Intermediate 8 steps
python 
import time
from dataclasses import dataclass, field
 
from fastapi import Depends, FastAPI, HTTPException, Request, status

Token-bucket rate limiting in FastAPI

rate-limiting token-bucket dependency-injection
Advanced 10 steps
javascript 
import { cookies } from 'next/headers';
import { NextResponse } from 'next/server';
import { SignJWT, jwtVerify } from 'jose';
 

JWT session cookies in a Next.js Route Handler

authentication jwt cookies
Intermediate 8 steps
java 
@Component
public class JwtAuthenticationFilter extends OncePerRequestFilter {
 
    private final JwtTokenProvider tokenProvider;

How a JWT auth filter works in Spring

authentication jwt servlet-filter
Intermediate 8 steps