OTIS Ho

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Custom Middleware in FastAPI: From Logging to Header Validation

back-end

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Custom Middleware in FastAPI: From Logging to Header Validation

In this blog, I will show you how to create custom middleware in FastAPI. Middleware is useful when you want to do something before or after a request is processed by your API. We will learn how to:

OTIS Ho

Jun 9, 2025 | 2 min read