Backend Jul 2, 2026 5 min read
CORS Preflight Explained
Learn how CORS preflight requests work, including OPTIONS handling, allowed methods, headers, credentials, caching, errors, and backend mistakes.
Tag
HTTP
5 articles with this tag.
API Design Jun 30, 2026 4 min read
PUT vs PATCH in REST APIs
Compare PUT and PATCH in REST APIs, including replacement vs partial updates, idempotency, validation, status codes, and backend implementation choices.
Backend Jun 30, 2026 4 min read
Secure HTTP Headers Explained for Backend Developers
Learn practical secure HTTP headers for backend apps, including HSTS, CSP, X-Content-Type-Options, frame protection, referrer policy, and cookie-related limits.
API Design Jun 28, 2026 5 min read
Rate Limiting in APIs Explained
Learn how API rate limiting works, including fixed windows, sliding windows, token buckets, 429 responses, headers, and backend tradeoffs.
API Design Mar 22, 2026 5 min read
REST API Status Codes Explained
Understand the HTTP status codes backend developers use most often in REST APIs, including 200, 201, 400, 401, 404, 409, and 500.