Added backend

backend/server/error.go

@@ -0,0 +1,25 @@
+package server
+
+import (
+	"TheAdversary/config"
+	"io"
+	"log"
+	"net/http"
+	"path/filepath"
+)
+
+func init() {
+	// disable default log output because http.ServeFile prints
+	// a message if a header is written 2 times or more
+	log.Default().SetOutput(io.Discard)
+}
+
+func Error404(w http.ResponseWriter, r *http.Request) {
+	w.WriteHeader(http.StatusNotFound)
+	http.ServeFile(w, r, filepath.Join(config.FrontendDir, "error", "404.html"))
+}
+
+func Error500(w http.ResponseWriter, r *http.Request) {
+	w.WriteHeader(http.StatusInternalServerError)
+	http.ServeFile(w, r, filepath.Join(config.FrontendDir, "error", "500.html"))
+}