clawbot
e410146fb6
check / check (push) Successful in 12s
POST / had no limit, so the signing key could be guessed at no cost. It is now limited to 5 attempts per minute per client by a new RateLimit middleware on github.com/go-chi/httprate; an attempt over the limit gets 429 with Retry-After. It counts by the address the ClientIP middleware resolved through trusted_proxies (an IPv4-mapped address as its IPv4 address, IPv6 by its /64) and runs after the body-size and CSRF checks, so every attempt that reaches the key comparison is counted. README says that with the default trusted_proxies a client with a private address can choose its counted address, and how to close that. Model: opus-5-5
89 lines
2.6 KiB
Go
89 lines
2.6 KiB
Go
package server
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import (
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"net/http"
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"time"
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sentryhttp "github.com/getsentry/sentry-go/http"
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"github.com/go-chi/chi/v5"
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"github.com/go-chi/chi/v5/middleware"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"sneak.berlin/go/pixa/internal/handlers"
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"sneak.berlin/go/pixa/internal/static"
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)
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// LoginAttemptsPerMinute is how many login attempts (POST /) one client may
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// make per minute; the next is refused with 429 Too Many Requests.
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const LoginAttemptsPerMinute = 5
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// SetupRoutes configures all HTTP routes.
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func (s *Server) SetupRoutes() {
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s.router = chi.NewRouter()
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s.router.Use(middleware.Recoverer)
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s.router.Use(middleware.RequestID)
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s.router.Use(s.mw.ClientIP())
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s.router.Use(s.mw.SecurityHeaders())
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s.router.Use(s.mw.Logging())
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// Add metrics middleware only if credentials are configured
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if s.config.MetricsUsername != "" {
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s.router.Use(s.mw.Metrics())
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}
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s.router.Use(s.mw.CORS())
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s.router.Use(middleware.Timeout(HTTPWriteTimeout))
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if s.sentryEnabled {
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sentryHandler := sentryhttp.New(sentryhttp.Options{
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Repanic: true,
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})
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s.router.Use(sentryHandler.Handle)
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}
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// Health check endpoint
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s.router.Get("/.well-known/healthcheck.json", s.h.HandleHealthCheck())
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// Robots.txt
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s.router.Get("/robots.txt", s.h.HandleRobotsTxt())
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// Static files (Tailwind CSS, etc.)
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s.router.Handle("/static/*", http.StripPrefix("/static/", static.Handler()))
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// Login/generator UI. The form routes carry CSRF protection; the
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// token cookie is independent of the session cookie, so it also
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// covers the login POST, where no session exists yet. LimitBody caps
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// the POST body ahead of CSRF, which reads its token from that body.
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// The login POST is rate limited per client after both, so every
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// attempt that reaches the signing key comparison is counted.
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s.router.Group(func(r chi.Router) {
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r.Use(s.h.LimitBody(handlers.MaxFormBytes))
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r.Use(s.h.CSRF())
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r.Get("/", s.h.HandleRoot())
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r.With(s.mw.RateLimit(LoginAttemptsPerMinute, time.Minute)).
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Post("/", s.h.HandleRoot())
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r.Post("/generate", s.h.HandleGenerateURL())
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})
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s.router.Get("/logout", s.h.HandleLogout())
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// Main image proxy route
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// /v1/image/<host>/<path>/<width>x<height>.<format>
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s.router.Get("/v1/image/*", s.h.HandleImage())
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s.router.Head("/v1/image/*", s.h.HandleImage())
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// Encrypted image URL route
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// The trailing filename (e.g., /img.jpg) is ignored but helps
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// browsers with content type
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s.router.Get("/v1/e/{token}/*", s.h.HandleImageEnc())
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// Metrics endpoint with auth
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if s.config.MetricsUsername != "" {
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s.router.Group(func(r chi.Router) {
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r.Use(s.mw.MetricsAuth())
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r.Get("/metrics", http.HandlerFunc(promhttp.Handler().ServeHTTP))
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})
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}
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}
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