Essential FastAPI Middleware Guide: Boost Security, Performance, and Functionality
This article explains how FastAPI middleware sits between incoming requests and outgoing responses, detailing built‑in and third‑party middleware such as CORS, GZip, HTTPS redirect, session, trusted host, error handling, rate limiting, authentication, custom headers, logging, timeout, trailing‑slash handling, IP whitelisting, proxy headers, CSRF protection, context management and global state, each with usage scenarios and code examples.