Web
Templ Mistakes With Escaping and Raw HTML in Components
Where templ escapes for you and where it does not: URLs, SafeURL, style strings, Raw, script data and event handlers, shown with real output and tests.
10 min read
Library
Everything you need to level up your coding skills.
Web
Download Files in Go With Range Requests and ServeContent
Serve large files from Go with http.ServeContent so browsers can resume downloads and seek in video, and see exactly what each Range header gets back.
9 min read
Web
Build a Webhook Receiver in Go With Signature Checks
Build a webhook receiver in Go that checks an HMAC signature on the raw body, rejects stale and replayed events, answers fast and processes in the background.
15 min read
APIs
API Versioning in Go and the Strategy That Ages Best
Compare URL, header, media type and date-based API versioning in Go, with one handler serving two views, a frozen v1 test and Sunset headers.
12 min read
Web
Custom 404 and Error Pages in Go Servers Done Right
Replace the plain text 404 and 405 responses of http.ServeMux with your own pages or JSON, using a catch-all route and a small response wrapper.
4 min read
Web
Address Already in Use in Go and How to Free the Port
Fix listen tcp bind address already in use in a Go server: find the process holding the port, handle containers and restarts, and use port 0 in tests.
8 min read
APIs
Generate a Go Server From an OpenAPI Spec Step by Step
Generate a Go net/http server from an OpenAPI file with oapi-codegen: config, the interface, validation middleware and what generated code leaves unchecked.
12 min read
Web
Call Web APIs From Go With Typed Clients and Context
Build a typed Go client for a JSON API: context on every call, one generic request helper, an APIError you can test with errors.Is, and paging as an iterator.
17 min read
Web
Templ vs html template in Go and Which Is Better for You
Compare templ and html/template on the same 100 row page: render speed and allocations, error timing, escaping, tooling and when each is the right choice.
9 min read
APIs
Conditional GET and ETags for Go JSON APIs Explained
Make JSON API revalidation cheap in Go: ETags from a revision column, collection tags, exact If-None-Match matching, 304 headers and 10x less work.
14 min read
WebGuide
Dependency Injection in Go Handlers Without a Framework
Give HTTP handlers their database, logger and clients through struct fields or closures, wire everything in main, test with fakes and avoid globals.
14 min read
APIs
Request Validation in Go APIs Without Reflection Magic
Validate Go API requests with a small collector: JSON Pointer paths, nested fields, cross-field rules, rune-aware lengths and 340 ns for a valid order.
17 min read
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