Add file processing

internal/handler/httperr.go

@@ -0,0 +1,47 @@
+package handler
+
+import (
+	"log"
+	"net/http"
+
+	"github.com/OmniX-Space/MeowBox-Core/internal/service"
+)
+
+func NotFoundHandler(w http.ResponseWriter, r *http.Request) {}
+
+// ErrorHandler Common error response handler
+func ErrorHandler(w http.ResponseWriter, r *http.Request, statusCode int) {
+	loadErrorTemplate()
+
+	w.WriteHeader(statusCode)
+	SetHeaders(w, "text/html; charset=utf-8")
+
+	var title, message string
+	switch statusCode {
+	case http.StatusNotFound:
+		title = ""
+		message = ""
+	case http.StatusInternalServerError:
+		title = ""
+		message = ""
+	case http.StatusBadRequest:
+		title = ""
+		message = ""
+	case http.StatusForbidden:
+		title = ""
+		message = ""
+	default:
+		title = "Error"
+		message = "An unexpected error occurred."
+	}
+
+	data := service.ErrorPageData{
+		StatusCode: statusCode,
+		Title:      title,
+		Message:    message,
+	}
+
+	if err := errorTemplate.Execute(w, data); err != nil {
+		log.Printf("[Error] Failed to render error page: %v", err)
+	}
+}