Web
Generate a Sitemap in Go for a Dynamic Website Quickly
Generate sitemaps in Go for a dynamic site: encode URLs correctly, write honest lastmod dates, split at 50,000 URLs with an index and gzip the output.
10 min read
Library
Everything you need to level up your coding skills.
APIs
Reject Unknown Fields and Decode Strict JSON in Go
Decode request JSON strictly in Go: DisallowUnknownFields, a single-value check, body limits and a map from decoder errors to 400, 413 and 422 answers.
6 min read
Web
Cache HTTP Responses in Go Handlers With Middleware
Build an in-memory response cache for Go handlers with keys, a TTL, Vary awareness, a singleflight stampede guard and rules for what must never be cached.
8 min read
Web
Templ Forms Validation Errors and CSRF Tokens in Go
Build an accessible templ form in Go with errors beside each field, kept values, a redirect after success and CSRF protection from Go 1.25.
9 min read
APIs
Bearer Tokens and Refresh Flows in Go APIs Explained
Build short-lived JWT access tokens and rotating refresh tokens in Go: pinned verification, hashed storage, reuse detection and a concurrent refresh trap.
13 min read
Web
HTTP Server Mistakes in Go That Hurt in Production
Twelve mistakes in Go HTTP servers that pass code review and fail under load or attack, each with the symptom, a reproduction where one fits, and the fix.
8 min read
Editor's pick
APIsGuide
Design and Build a JSON API in Go That Stays Maintainable
Build a JSON API in Go from a written contract: standard routing, one error format, strict decoding, validation, cursor paging, PATCH, auth and tests.
39 min read
Web
WebSockets in Go With a Real Hub Design and Backpressure
Build a WebSocket hub in Go with gorilla/websocket: origin checks, read limits, ping and pong, per client send queues and a rule for slow consumers.
13 min read
Web
Build a Pastebin Clone in Go With Expiring Share Links
Build a pastebin in Go on SQLite with unguessable IDs, expiry, burn after read that survives link previews, delete tokens and output that cannot run scripts.
20 min read
APIs
Partial Updates in Go APIs With PATCH and Pointers
Implement PATCH in a Go API with merge-patch semantics: tell absent, null and zero apart, apply only the keys sent and reject bad patches before any SQL runs.
12 min read
Web
Expose Pprof on a Go Server Without Exposing It to Everyone
Serve net/http/pprof from a separate loopback listener with a token, avoid the DefaultServeMux trap, and fix the WriteTimeout error on CPU profiles.
9 min read
WebGuide
Templ for Type Safe HTML Components in Go Web Apps
A practical templ tutorial for Go: write components in .templ files, generate Go code, compose layouts, serve them over HTTP and test the output.
12 min read
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