Code Mala Tang
Jun 2, 2025 · Backend Development
Unlocking FastAPI: A Deep Dive into Starlette, ASGI, and Middleware Architecture
This article explains how FastAPI builds on Starlette, covering the ASGI protocol, Starlette's initialization, middleware design—including ExceptionMiddleware and user-defined middleware—and routing mechanisms, while providing concrete code examples and performance insights for backend developers.
ASGIRoutingStarlette
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