HTTP on Nalar

Go Context Timeouts and Request Cancellation

Tue, 01 Sep 2026 00:00:00 +0700

A Go HTTP handler can outlive the request that started it unless the work inside the handler pays attention to cancellation. That matters when a client disconnects, an upstream request takes too long, or a database query is no longer useful.

Go solves this with context.Context. Every incoming *http.Request already has a context, and that context is canceled when the client connection closes, the request is canceled by HTTP/2, or the handler returns. You can also derive a shorter deadline for work that should not consume the entire request lifetime.

Graceful HTTP Server Shutdown in Go

Tue, 01 Sep 2026 00:00:00 +0700

Stopping a web server with Ctrl+C looks harmless during development, but production deployments need a more careful shutdown process. If a process exits immediately, active HTTP requests can be interrupted, clients may receive connection errors, and in-flight work can be left unfinished.

Go’s standard library already provides the pieces needed for a clean shutdown. The main tools are os/signal, context, and http.Server.Shutdown.

This guide shows a practical pattern for shutting down an HTTP server when the process receives SIGINT or SIGTERM.

Testing Go HTTP Handlers with httptest

Tue, 01 Sep 2026 00:00:00 +0700

HTTP handlers are one of the easiest parts of a Go service to test well. You usually do not need to bind a real network port, start the entire application, or depend on an external test framework.

Go’s standard library provides net/http/httptest, which can construct HTTP requests, capture handler responses, and even start temporary HTTP servers when a real client-server round trip matters.

This guide builds a small JSON endpoint and tests it at several useful levels.