codesnips

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
go 
package httpcache

import (
	"strconv"
	"strings"
	"time"

Parsing Cache-Control max-age for a TTL In-Memory Cache in Go

go caching http
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
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
go 
package authtransport

import (
	"errors"
	"net/http"
)

Injecting Auth Headers via a Custom http.RoundTripper Decorator in Go

go http middleware
by codesnips 3 tabs
go 
package web

import (
	"embed"
	"io/fs"
)

Serve Embedded Static Assets with embed.FS and Cache Headers in Go

go embed static-assets
by codesnips 3 tabs
go 
package main

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

Serving Partial Video Content with HTTP Range Requests in Go

go http range-requests
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