Laravel style#8
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May 30, 2026 19:11
Adds Laravel-grade security middleware to the native web package so
production apps no longer need to assemble guards by hand:
- SecurityHeaders(): CSP, X-Frame-Options, X-Content-Type-Options,
Referrer-Policy, Permissions-Policy, optional HSTS
- CSRF(): double-submit cookie + constant-time compare, safe-method skip
- RateLimit(n, window) / Throttle(): per-IP fixed-window limiter with
Retry-After; gc'd in the background
- BodyLimit(n): http.MaxBytesReader wrapper to prevent payload DoS
- RequestID(): X-Request-ID generated or echoed for trace correlation
- CORSWithConfig(): credentials/methods/headers/max-age, rejects unsafe
wildcard + credentials combo, never leaks ACAO to untrusted origins
Validation lives in the web package directly (no Gin dep) — Validate(),
ValidationError, and c.BindAndValidate() that auto-maps failures to
HTTP 422 with {"errors": {field: msg}}.
Server hardening:
- Server.ReadTimeout / WriteTimeout / IdleTimeout / MaxHeaderBytes set
on web.App.Run() (was: only ReadHeaderTimeout)
- c.Bind() applies DefaultBodyLimit (1 MiB) and DisallowUnknownFields()
- Production-safe c.InternalError: APP_ENV=production hides raw err
- c.SetCookie / Cookie / ClearCookie with HttpOnly/Secure/SameSite=Lax
defaults; CookieInsecure/CookieReadable opt-outs for dev/CSRF tokens
Bug fixes uncovered while building the secure example:
- c.JSON wrote the body twice when Bind() set a 400 then respond() also
processed the returned err. Tracked with new bodyWritten flag; tested
with TestBind_DoubleBodyWithLoggerMiddleware
- c.Created() flushed the status before respond() could set
Content-Type, leaving 201 responses as text/plain. Replaced with
pendingStatus that defers WriteHeader until body write
Adds examples/secure showing the full stack, TODO.md tracking remaining
gaps, SECURITY.md cataloguing every defense by layer.
go test ./... and go vet ./... pass.
Extends the struct-tag validator with five common Laravel rules: - numeric — string must parse as int or float - integer — string must parse as an int - ip — string must be a valid IPv4 or IPv6 address - gt=N — strictly greater (string len / int / uint / float) - lt=N — strictly less TestValidate_ExtraRules covers both passing and failing paths for each rule. TODO.md flips the boxes on everything delivered in this branch so far and notes the two pre-existing bugs uncovered (double-body write, Created Content-Type) and how they were fixed.
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