redirect from www to the root

Author: martinjirku

main.go

@@ -188,6 +188,7 @@ func prepareServices(log *slog.Logger, fs fs.FS) (*services.CSS, *services.Spons
 }
 
 func prepareMiddleware(router *mux.Router, log *slog.Logger, storeService sessions.Store) {
+	router.Use(middleware.RedirectFromWWWSubdomain(log))
 	router.Use(middleware.Recover(middlewareLog(log, "recover")))
 	router.Use(middleware.RequestID(middlewareLog(log, "requestID")))
 	router.Use(middleware.Logger(middlewareLog(log, "logger")))

pkg/middleware/redirect.go

@@ -0,0 +1,25 @@
+package middleware
+
+import (
+	"log/slog"
+	"net/http"
+)
+
+func RedirectFromWWWSubdomain(logger *slog.Logger) func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			if r.Host == "www.mcmamina.sk" {
+				if r.URL.RawQuery != "" {
+					target := "https://mcmamina.sk"
+					// target := fmt.Sprintf("https://mcmamina.sk%s", r.URL.Path)
+					// target += "?" + r.URL.RawQuery
+					logger.Info("redirecting", slog.String("host", r.Host), slog.String("target", target))
+					http.Redirect(w, r, target, http.StatusMovedPermanently)
+					return
+				}
+
+			}
+			next.ServeHTTP(w, r)
+		})
+	}
+}