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acoshift merged 2 commits into from
Jul 19, 2026
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docs: modernize CSRF guidance for SameSite era #124

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docs: modernize CSRF guidance for SameSite era
acoshift Jul 19, 2026
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docs: point CSRF defense-in-depth at http.NewCrossOriginProtection
acoshift Jul 19, 2026
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2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -64,7 +64,7 @@ Notes:
<meta name="htmx-config" content='{"responseHandling":[{"code":"422","swap":true},{"code":"204","swap":false},{"code":"[23]..","swap":true},{"code":"[45]..","swap":false,"error":true}]}'>
```

- CSRF: hime ships no CSRF middleware — wire your token with `hx-headers`, e.g. `<body hx-headers='{"X-CSRF-Token": "{{.Token}}"}'>`. Use per-session (not per-request) tokens, or set `hx-history="false"`, since htmx snapshots pages into localStorage.
- CSRF: set `SameSite=Lax` (or `Strict`) explicitly on your session cookie and never mutate state on GET — that alone stops classic cross-site form CSRF in modern browsers. For defense-in-depth (untrusted subdomains are still "same-site"), wrap your handler with the standard library's [`http.NewCrossOriginProtection`](https://pkg.go.dev/net/http#CrossOriginProtection): `app.Handler(cop.Handler(mux))` — hime adds nothing because it composes directly. If you use token middleware anyway, wire it with `hx-headers`, e.g. `<body hx-headers='{"X-CSRF-Token": "{{.Token}}"}'>`, and prefer per-session tokens (or set `hx-history="false"`) since htmx snapshots pages into localStorage.

## License

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