codesnips

middleware

go 
package ratelimit

import (
	"sync"
	"time"
)

Token Bucket Rate-Limiting Middleware for a Go net/http API

go net-http middleware
by codesnips 4 tabs
lua 
-- KEYS[1] = bucket key
-- ARGV: capacity, refillPerSec, now(ms), cost, ttl(sec)
local capacity      = tonumber(ARGV[1])
local refill        = tonumber(ARGV[2])
local now           = tonumber(ARGV[3])
local cost          = tonumber(ARGV[4])

Token-Bucket Rate Limiting Middleware for Express with Per-Route Config

express rate-limiting token-bucket
by codesnips 3 tabs
javascript 
const MAX_LIMIT = 100;
const DEFAULT_LIMIT = 20;
const ALLOWED_ORDER = new Set(['asc', 'desc']);

function decodeCursor(raw) {
  const json = Buffer.from(raw, 'base64').toString('utf8');

Cursor-Based Pagination in Express With Query-Parsing Middleware

express pagination cursor-pagination
by codesnips 3 tabs
ruby 
module RequestStore
  def self.store
    Thread.current[:request_store] ||= {}
  end

  def self.fetch(key)

Hot Path Memoization (within request only)

rails performance memoization
by codesnips 4 tabs
rust 
use std::collections::HashMap;
use std::fmt;

#[derive(Debug, Clone)]
pub struct Document {
    pub body: String,

Trait-Based Document Transform Pipeline With Ordered Plugins in Rust

rust trait-objects pipeline
by codesnips 3 tabs
lua 
-- KEYS[1] = bucket key
-- ARGV[1] = capacity, ARGV[2] = refill_per_sec, ARGV[3] = now (float seconds)
local capacity = tonumber(ARGV[1])
local rate = tonumber(ARGV[2])
local now = tonumber(ARGV[3])

Redis-Backed Token Bucket Rate Limiter as FastAPI Middleware

fastapi redis rate-limiting
by codesnips 4 tabs
go 
package main

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

Instrumenting Go HTTP Handlers with Prometheus Counters and Histograms

prometheus metrics observability
by codesnips 3 tabs
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