codesnips
ruby 
class LoginCode < ApplicationRecord
  belongs_to :user

  CODE_LENGTH = 6
  TTL = 10.minutes

One-Time Password Login: Expiring Token Model, Mailer, and Verification in Rails

rails authentication otp
by codesnips 3 tabs
python 
import logging
import re

_BASE_FIELDS = set(logging.makeLogRecord({}).__dict__.keys())

_PATTERNS = [

Redacting Sensitive Fields in Structured Python Logs with a logging.Filter

logging security redaction
by codesnips 3 tabs
java 
package com.shop.shipping;

import java.math.BigDecimal;

public interface ShippingCostCalculator {

Runtime Strategy Selection for Shipping-Cost Calculators via a Factory

strategy-pattern factory-pattern design-patterns
by codesnips 4 tabs
javascript 
'use strict';

function dedupeAsync(producer, keyFn) {
  const pending = new Map();
  const resolveKey = keyFn || ((...args) => JSON.stringify(args));

Deduplicate Concurrent Async Calls With a Promise Cache in Node.js

nodejs async promises
by codesnips 3 tabs
php 
<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

Idempotent Stripe Webhook Processing With a Processed-Events Table in Laravel

laravel webhooks idempotency
by codesnips 3 tabs
ruby 
class TypingPresence
  EXPIRE_AFTER = 6 # seconds

  def initialize(room, redis: Redis.current)
    @room = room
    @redis = redis

Broadcast Typing Indicators in Rails Chat with ActionCable and a Redis Presence Tracker

rails actioncable websockets
by codesnips 3 tabs
python 
import datetime
import jwt
from flask import current_app


class TokenError(Exception):

Token-Based Auth Decorator That Loads current_user Into Flask's g

flask authentication decorators
by codesnips 3 tabs
sql 
CREATE TABLE country (
    code       CHAR(2)      PRIMARY KEY,
    name       VARCHAR(128) NOT NULL,
    currency   CHAR(3)      NOT NULL,
    updated_at TIMESTAMPTZ  NOT NULL DEFAULT now()
);

Seeding Reference Data After a Flyway Migration with a Java Callback

flyway spring-boot migrations
by codesnips 3 tabs
python 
import asyncio
import uuid
from dataclasses import dataclass, field
from typing import Any, Dict, Optional

Long-Polling a Background Job's Status with a Shared Result Registry in FastAPI

fastapi asyncio long-polling
by codesnips 3 tabs
javascript 
const crypto = require('crypto');

function parseSignatureHeader(header) {
  const parts = {};
  for (const segment of String(header || '').split(',')) {
    const [key, value] = segment.split('=');

Verify Stripe-Style Webhook HMAC Signatures with a Timestamped Scheme in Express

express webhooks hmac
by codesnips 3 tabs
php 
<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Model;

Queued Saved-Search Digest Emails for New Listings in Laravel

laravel queues eloquent
by codesnips 3 tabs
ruby 
class ImportResult
  RowError = Struct.new(:line, :messages)

  attr_reader :imported, :row_errors

  def initialize

Streaming CSV Product Import With Per-Row Validation and Error Reporting in Rails

rails csv service-object
by codesnips 3 tabs