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io.Reader Composition: Build a Logging Pipeline From Stdlib Pieces

DEV Community·Gabriel Anhaia·6 months ago
#VXZaMdvV
#when#go#http#body#writer
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Book: The Complete Guide to Go Programming

Also by me: Thinking in Go (2-book series) — Complete Guide to Go Programming + Hexagonal Architecture in Go

My project: Hermes IDE | GitHub — an IDE for developers who ship with Claude Code and other AI coding tools

Me: xgabriel.com | GitHub

A team I worked with kept asking the same question every

sprint. They had an HTTP service that accepted webhook

payloads from a partner and forwarded them to an internal

billing API. Compliance wanted a copy of every request

body archived to disk, gzipped, with a line-by-line audit

log to stdout for debugging. The first attempt pulled in

three libraries, a goroutine pool, and a Kafka producer.

None of it worked end to end after a week.

The second attempt threw the libraries away and used four

types from the Go standard library. It shipped in an

afternoon. The whole pipeline came in around fifty lines.

Forget the audit log for a second.…

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