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http

typescript 
const RETRYABLE_STATUS = new Set([408, 429, 500, 502, 503, 504]);

export function isRetryable(error: unknown, response?: Response): boolean {
  if (response) {
    return RETRYABLE_STATUS.has(response.status);
  }

Retrying Fetch With Exponential Backoff and Full Jitter in TypeScript

retry backoff jitter
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 health

import (
	"context"
	"sync"
	"time"

Concurrent Readiness Health Check Endpoint in Go with Timeouts

go health-check readiness
by codesnips 3 tabs
go 
package logctx

import (
	"context"
	"log/slog"
)

Request-Scoped Structured Logging with slog and Context in Go

go logging slog
by codesnips 3 tabs
typescript 
import { z } from "zod";

const coerceNumber = z.preprocess((v) => {
  if (v === "" || v === undefined) return undefined;
  if (typeof v !== "string") return v;
  const n = Number(v);

API input coercion for query params (Zod preprocess)

typescript validation api
by codesnips 3 tabs
ruby 
class CircuitBreaker
  class CircuitOpenError < StandardError; end

  def initialize(name, redis: Redis.current, failure_threshold: 5, failure_window: 60, cooldown: 30)
    @key = "circuit:#{name}"
    @redis = redis

Service-Level “Circuit Breaker” (Simple)

rails reliability http
by codesnips 3 tabs
go 
package webhooks

import (
  "bytes"
  "crypto/hmac"
  "crypto/sha256"

Webhook signature verification with HMAC (timing-safe compare)

go security http
by Leah Thompson 1 tab
javascript 
const RETRYABLE_STATUS = new Set([408, 429, 500, 502, 503, 504]);

export function fullJitter(attempt, baseDelay = 300, maxDelay = 10_000) {
  const ceiling = Math.min(maxDelay, baseDelay * 2 ** attempt);
  return Math.random() * ceiling;
}

Fetch With Exponential Backoff and Full Jitter Retries

fetch retry exponential-backoff
by codesnips 3 tabs