From 7f33fd2cd05ee958010b16eb590a881477d2a712 Mon Sep 17 00:00:00 2001
From: Anhgelus Morhtuuzh <william@herges.fr>
Date: Fri, 2 Jan 2026 16:11:48 +0100
Subject: feat(backend): handle robots.txt

---
 backend/router.go | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

(limited to 'backend')

diff --git a/backend/router.go b/backend/router.go
index 59a8574..2f43575 100644
--- a/backend/router.go
+++ b/backend/router.go
@@ -11,6 +11,7 @@ import (
 	"log/slog"
 	"net/http"
 	"os"
+	"path"
 	"strings"
 	"time"
 
@@ -123,7 +124,7 @@ func NewRouter(debug bool, cfg *Config, db *sql.DB, assets fs.FS) *chi.Mux {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 			next.ServeHTTP(w, r)
 			go func(ctx context.Context, r *http.Request) {
-				if strings.HasPrefix(r.RequestURI, "/static") {
+				if strings.HasPrefix(r.RequestURI, "/static") || r.RequestURI == "/robots.txt" {
 					return
 				}
 				logger := GetLogger(ctx)
@@ -146,6 +147,24 @@ func NewRouter(debug bool, cfg *Config, db *sql.DB, assets fs.FS) *chi.Mux {
 		})
 	})
 
+	r.HandleFunc("/robots.txt", func(w http.ResponseWriter, r *http.Request) {
+		ctx := r.Context()
+		cfg := ctx.Value(configKey).(*Config)
+		logger := GetLogger(ctx)
+		logger.Info("bot requesting robots.txt", "User-Agent", r.Header.Get("User-Agent"))
+		b, err := os.ReadFile(path.Join(cfg.PublicFolder, "robots.txt"))
+		if os.IsNotExist(err) {
+			notFound(w, r)
+			return
+		} else if err != nil {
+			panic(err)
+		}
+		_, err = w.Write(b)
+		if err != nil {
+			panic(err)
+		}
+	})
+
 	return r
 }
 
-- 
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