codesnips

middleware

javascript 
const multer = require('multer');

const ALLOWED_MIME = new Set(['image/jpeg', 'image/png', 'image/webp']);

function fileFilter(req, file, cb) {
  if (!ALLOWED_MIME.has(file.mimetype)) {

Upload and Resize User Avatars with Multer and Sharp in Express

express multer sharp
by codesnips 3 tabs
rust 
use axum::{
    extract::{FromRequestParts, State},
    http::{request::Parts, StatusCode},
    response::{IntoResponse, Response},
    Json,
};

Axum Bearer Token Extractor with Shared Auth State and Typed Claims

axum authentication middleware
by codesnips 3 tabs
ruby 
module QueryBudget
  class Counter
    IGNORED = %w[SCHEMA CACHE TRANSACTION].freeze

    attr_reader :count

Per-Request Query Budget (Detect Runaway Pages)

rails performance observability
by codesnips 4 tabs
php 
<?php

namespace App\Jobs;

use App\Models\Invoice;
use App\Services\StripeGateway;

Preventing Double-Charges in Laravel with WithoutOverlapping Job Middleware

laravel queues background-jobs
by codesnips 3 tabs
php 
<?php

declare(strict_types=1);

namespace App\Security;

PHP Login Rate Limiting with a Sliding-Window Throttle Middleware

php rate-limiting middleware
by codesnips 3 tabs
php 
<?php

namespace App\Http\Requests\Wizard;

use Illuminate\Foundation\Http\FormRequest;

Multi-Step Onboarding Wizard in Laravel with Per-Step Form Requests and Session Progress

laravel forms validation
by codesnips 4 tabs
go 
package proxy

import (
	"log"
	"net"
	"net/http"

Building a Reverse Proxy in Go with httputil.ReverseProxy and Header Rewriting

go reverse-proxy httputil
by codesnips 3 tabs
ruby 
class SlidingWindowLimiter
  Result = Struct.new(:allowed, :count, :limit, :window_ms, keyword_init: true)

  SCRIPT = <<~LUA.freeze
    local key = KEYS[1]
    local now = tonumber(ARGV[1])

Rate Limiting with Redis + Increment Expiry

rails redis reliability
by codesnips 3 tabs
rust 
use dashmap::DashMap;
use std::time::Instant;

pub struct TokenBucket {
    tokens: f64,
    last_refill: Instant,

Token-Bucket Rate Limiter Middleware for Axum Using DashMap

axum rust rate-limiting
by codesnips 3 tabs
go 
package api

import (
	"encoding/json"
	"encoding/xml"
	"net/http"

Content-Negotiating HTTP Handler for JSON and XML in Go

go http content-negotiation
by codesnips 2 tabs
javascript 
class ApiError extends Error {
  constructor(statusCode, message, code) {
    super(message);
    this.name = 'ApiError';
    this.statusCode = statusCode;
    this.code = code || null;

Centralized Async Error Handling in Express With asyncHandler and Error Middleware

express nodejs error-handling
by codesnips 4 tabs
javascript 
const crypto = require('crypto');

function computeStrongEtag(body) {
  const buf = Buffer.isBuffer(body) ? body : Buffer.from(String(body));
  const digest = crypto.createHash('sha1').update(buf).digest('base64');
  return '"' + digest + '"';

ETag-Based HTTP Caching in Express With 304 Not Modified Handling

express http-caching etag
by codesnips 3 tabs