refactor(lib): Split up anubis.go into some smaller files. (#379)

* refactor(logging): centralize logger creation in GetLogger function

Signed-off-by: Jason Cameron <git@jasoncameron.dev>

* refactor(logging): rename GetLogger to GetRequestLogger for clarity

Signed-off-by: Jason Cameron <git@jasoncameron.dev>

* refactor: streamline error handling and response methods

Signed-off-by: Jason Cameron <git@jasoncameron.dev>

* refactor(lib): Split anubis.go up into some smaller specialized methods

Signed-off-by: Jason Cameron <git@jasoncameron.dev>

* refactor(http): simplify error response handling by using respondWithStatus

Signed-off-by: Jason Cameron <git@jasoncameron.dev>

* chore(lib): run goimports

Signed-off-by: Xe Iaso <me@xeiaso.net>

---------

Signed-off-by: Jason Cameron <git@jasoncameron.dev>
Signed-off-by: Xe Iaso <me@xeiaso.net>
Co-authored-by: Xe Iaso <me@xeiaso.net>

lib/http.go

@@ -2,8 +2,14 @@ package lib
 
 import (
 	"net/http"
+	"slices"
 	"time"
 
+	"github.com/TecharoHQ/anubis/internal"
+	"github.com/TecharoHQ/anubis/lib/policy"
+	"github.com/TecharoHQ/anubis/web"
+	"github.com/a-h/templ"
+
 	"github.com/TecharoHQ/anubis"
 )
 
@@ -33,3 +39,79 @@ func (t UnixRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
 	req.URL.Scheme = "http" // make http.Transport happy and avoid an infinite recursion
 	return t.Transport.RoundTrip(req)
 }
+
+func (s *Server) RenderIndex(w http.ResponseWriter, r *http.Request, rule *policy.Bot, returnHTTPStatusOnly bool) {
+	if returnHTTPStatusOnly {
+		w.WriteHeader(http.StatusUnauthorized)
+		w.Write([]byte("Authorization required"))
+		return
+	}
+
+	lg := internal.GetRequestLogger(r)
+
+	challenge := s.challengeFor(r, rule.Challenge.Difficulty)
+
+	var ogTags map[string]string = nil
+	if s.opts.OGPassthrough {
+		var err error
+		ogTags, err = s.OGTags.GetOGTags(r.URL)
+		if err != nil {
+			lg.Error("failed to get OG tags", "err", err)
+		}
+	}
+
+	component, err := web.BaseWithChallengeAndOGTags("Making sure you're not a bot!", web.Index(), challenge, rule.Challenge, ogTags)
+	if err != nil {
+		lg.Error("render failed, please open an issue", "err", err) // This is likely a bug in the template. Should never be triggered as CI tests for this.
+		s.respondWithError(w, r, "Internal Server Error: please contact the administrator and ask them to look for the logs around \"RenderIndex\"")
+		return
+	}
+
+	handler := internal.NoStoreCache(templ.Handler(component))
+	handler.ServeHTTP(w, r)
+}
+
+func (s *Server) RenderBench(w http.ResponseWriter, r *http.Request) {
+	templ.Handler(
+		web.Base("Benchmarking Anubis!", web.Bench()),
+	).ServeHTTP(w, r)
+}
+
+func (s *Server) respondWithError(w http.ResponseWriter, r *http.Request, message string) {
+	s.respondWithStatus(w, r, message, http.StatusInternalServerError)
+}
+
+func (s *Server) respondWithStatus(w http.ResponseWriter, r *http.Request, msg string, status int) {
+	templ.Handler(web.Base("Oh noes!", web.ErrorPage(msg, s.opts.WebmasterEmail)), templ.WithStatus(status)).ServeHTTP(w, r)
+}
+
+func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	s.mux.ServeHTTP(w, r)
+}
+
+func (s *Server) ServeHTTPNext(w http.ResponseWriter, r *http.Request) {
+	if s.next == nil {
+		redir := r.FormValue("redir")
+		urlParsed, err := r.URL.Parse(redir)
+		if err != nil {
+			s.respondWithStatus(w, r, "Redirect URL not parseable", http.StatusBadRequest)
+			return
+		}
+
+		if (len(urlParsed.Host) > 0 && len(s.opts.RedirectDomains) != 0 && !slices.Contains(s.opts.RedirectDomains, urlParsed.Host)) || urlParsed.Host != r.URL.Host {
+			s.respondWithStatus(w, r, "Redirect domain not allowed", http.StatusBadRequest)
+			return
+		}
+
+		if redir != "" {
+			http.Redirect(w, r, redir, http.StatusFound)
+			return
+		}
+
+		templ.Handler(
+			web.Base("You are not a bot!", web.StaticHappy()),
+		).ServeHTTP(w, r)
+	} else {
+		s.next.ServeHTTP(w, r)
+	}
+}