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• The Complete Guide to API Design: Settle the Irreversible Decisions First

  This guide reorganizes API design around a single axis: which decisions become irreversible the moment you publish, and which you can still change later. Resource boundaries, identifiers, method semantics, status codes,

  2026-08-15 · 24 min read #api설계#rest#http#rfc9110#rfc9457

• HTTP Keep-Alive and connection reuse — the timeout race condition behind intermittent 502s

  When the backend logs contain no errors at all and only the load balancer intermittently mixes in 502s, it is usually a connection reuse race condition. At the exact moment the server closes an idle connection, the clien

  2026-07-26 · 15 min read #network#http#performance#load-balancer#tcp

• CORS Errors and Why You Fix the Server — How the Browser Policy Actually Works, and the Wrong Ways Around It

  CORS is not a security device that protects your server. It is a policy that decides whether the browser will hand a response to a script. That is why curl succeeds while only the browser is blocked, and why the place to

  2026-07-26 · 14 min read #web#cors#http#browser-security#api

• The HTTP QUERY Method — A New Verb for an Old REST Dilemma

  GET cannot carry a request body and POST is semantically wrong for search. This article explores the HTTP QUERY method that resolves this long-standing dilemma, covering its motivation, semantics, and practical adoption.

  2026-06-25 · 14 min read #http#query-method#rest#api-design#rfc

• CDN Complete Guide — Cache, Edge Compute, Origin Shield, and HTTP Caching Headers (2025)

  Everything about CDNs — the history of edge caching since Akamai in 1998, the routing trinity of Anycast plus DNS plus GSLB, the physical anatomy of PoPs and edge servers, Cache Key design and Vary header pitfalls, HTTP

  2026-04-15 · 15 min read #cdn#caching#edge-compute#cloudflare#fastly

• REST API Design Best Practices 2025: Naming, Versioning, Error Handling, Pagination, Security

  Everything about REST API design! Resource naming, correct HTTP method usage, status codes, error response standards, pagination (Cursor vs Offset), versioning (URL vs Header), authentication (OAuth2/JWT/API Key), OpenAP

  2026-03-25 · 19 min read #rest-api#api-design#http#pagination#versioning

• Networking Fundamentals Every Developer Must Know: TCP/IP, HTTP, DNS, TLS to gRPC and WebSocket

  A comprehensive guide to networking fundamentals every developer must know. From the TCP/IP 4-layer model, HTTP/1.1 vs 2 vs 3, DNS resolution, TLS handshakes, gRPC, WebSocket, CDN, to load balancers — a practical guide y

  2026-03-23 · 27 min read #networking#tcp-ip#http#dns#tls

• The Complete HTTP/HTTPS Troubleshooting Guide - Production Debugging Techniques

  A comprehensive guide covering HTTP status code analysis, TLS handshake debugging, certificate chain validation, advanced curl techniques, 502/503/504 error resolution, CORS issues, redirect loops, HTTP/2 and HTTP/3 debu

  2026-03-08 · 22 min read #networking#http#https#tls#troubleshooting