initial commit

src/middleware/errors.js

@@ -0,0 +1,25 @@
+export class HttpError extends Error {
+  constructor(status, message, details = undefined) {
+    super(message);
+    this.name = 'HttpError';
+    this.status = status;
+    this.details = details;
+  }
+}
+
+export function notFoundHandler(req, res, next) {
+  next(new HttpError(404, 'Ressource nicht gefunden.'));
+}
+
+export function errorHandler(error, req, res, next) {
+  if (res.headersSent) return next(error);
+  let status = Number.isInteger(error.status) ? error.status : 500;
+  if (error.code === 'LIMIT_FILE_SIZE') status = 413;
+  if (error.code === 'LIMIT_UNEXPECTED_FILE') status = 400;
+  if (status >= 500) console.error(error);
+  res.status(status).json({
+    error: error.name || 'Error',
+    message: status >= 500 ? 'Interner Serverfehler.' : error.message,
+    ...(error.details ? { details: error.details } : {})
+  });
+}