codesnips

reliability

go 
package optimistic

import (
	"errors"
	"sync"
)

Optimistic UI Rollback in Go With a Compensating Action Log

go concurrency optimistic-ui
by codesnips 3 tabs
javascript 
const Busboy = require('busboy');
const { storeFile } = require('./storage');

function parseMultipart(req, { maxFileSize = 20 * 1024 * 1024 } = {}) {
  return new Promise((resolve, reject) => {
    const busboy = Busboy({

Streaming Multipart Form Upload Parser Using Busboy in Node.js

nodejs multipart streaming
by codesnips 3 tabs
sql 
CREATE TABLE outbox_deliveries (
    id              BIGSERIAL PRIMARY KEY,
    dedupe_key      TEXT        NOT NULL,
    target_url      TEXT        NOT NULL,
    payload         JSONB       NOT NULL,
    status          TEXT        NOT NULL DEFAULT 'PENDING',

Reliable Webhook Delivery with a Transactional Outbox and Dedupe Key in Spring Boot

spring-boot webhooks outbox-pattern
by codesnips 3 tabs
go 
package main

import (
  "context"
  "net/http"
  "time"

HTTP server timeouts that prevent slowloris and stuck connections

go http reliability
by Leah Thompson 1 tab
rust 
use std::time::{Duration, Instant};

pub struct LeakyBucket {
    level: f64,
    capacity: f64,
    rate_per_sec: f64,

Leaky-Bucket Rate Shaper for a Tokio Message Consumer

rate-limiting leaky-bucket backpressure
by codesnips 3 tabs
sql 
CREATE TABLE idempotency_keys (
    id              BIGSERIAL PRIMARY KEY,
    idempotency_key TEXT        NOT NULL,
    request_path    TEXT        NOT NULL,
    request_fingerprint TEXT    NOT NULL,
    status          TEXT        NOT NULL DEFAULT 'in_progress',

Idempotent POST Requests with an Idempotency-Key Middleware in Express

express idempotency middleware
by codesnips 3 tabs
go 
package events

import "encoding/json"

type Envelope struct {
  Type    string          `json:"type"`

Store unstructured JSON safely with json.RawMessage

go json events
by Leah Thompson 1 tab
ruby 
module StatementTimeout
  extend ActiveSupport::Concern

  class TimeoutExceeded < StandardError; end

  def with_statement_timeout(milliseconds)

Guard Against Slow Queries with statement_timeout

rails postgres performance
by codesnips 3 tabs
go 
package middleware

import (
  "net/http"

  "go.uber.org/zap"

Panic recovery middleware for HTTP servers

go http middleware
by Leah Thompson 1 tab
go 
package jobs

import (
  "context"
  "math/rand"
  "time"

Robfig cron jobs with context cancellation and jitter

go cron background-jobs
by Leah Thompson 1 tab
go 
package middleware

import (
  "log"
  "net/http"
  "runtime/debug"

Panic recovery middleware that fails closed and logs context

go http middleware
by Leah Thompson 1 tab
javascript 
function createReadiness() {
  let ready = true;

  function markUnready() {
    ready = false;
  }

Graceful HTTP Server Shutdown on SIGTERM With In-Flight Request Draining in Node.js

nodejs http graceful-shutdown
by codesnips 3 tabs