Series

Go HTTP middleware from scratch

Most Go HTTP tutorials drop you straight into middleware without explaining the foundation. You copy the code, it works, but you have no idea why. The idea of this series fixes that.

In part 1 we start with Go types, what they are, how function types work, and why a plain function can suddenly have a method attached to it. It's a short read, but it's the piece most tutorials skip and the reason middleware feels like magic to beginners. In part 2 we use that foundation to build three real middleware functions from scratch: a request ID generator, a structured logger, and an auth checker. We chain them together, test them with curl, and cover the gotchas that trip up almost everyone. Who this is for: Go beginners who want to understand the HTTP middleware pattern properly, and developers coming from Node, Python, or Java who are used to frameworks doing this magic for them.

Go types explained: the foundation you need before writing HTTP handlers
A quick introduction to Go types According to https://go.dev/ref/spec#Types, in Go, a type specifies a set of values, along with operations and methods specific to those values. This is something fund
Jun 11, 20267 min read33
Go HTTP middleware explained: what it is, how it works, and how to build your own
This is part 2 of 2 in the series Go HTTP middleware from scratch. If you're new to Go types, → read part 1 first. The same code keeps showing up everywhere You're building an HTTP server. Every req
Jun 22, 202622 min read24

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