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Templ Layouts Slots and Component Composition in Go
Build nested templ layouts with children, component slots, optional slots, conditional attributes, a script emitted once and data from the context.
7 min read
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Servers, handlers, middleware, templates, cookies and sessions on net/http, plus the parts of a real website the tutorials leave out.
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Test HTTP Handlers in Go Without Starting a Real Server
Call handlers directly with httptest.NewRecorder and NewRequest, set path values by hand, fake the store behind them, and assert on status, headers and JSON.
9 min read
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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
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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
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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
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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
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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
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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
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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
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
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Build a Load Balancer in Go With Active Health Checks
Build an HTTP load balancer in Go with round robin and least connections, active health checks with rise and fall thresholds, and passive failure marking.
14 min read
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Add Server Side Search to a Go Website Without Elastic
Add full-text search to a Go site with SQLite FTS5: stemming, bm25 ranking, highlighted snippets, search as you type and safe handling of raw user queries.
15 min read
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