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 } : {})
+  });
+}

src/middleware/upload.js

@@ -0,0 +1,30 @@
+import path from 'node:path';
+import crypto from 'node:crypto';
+import multer from 'multer';
+import { config } from '../config.js';
+import { HttpError } from './errors.js';
+
+const storage = multer.diskStorage({
+  destination: path.join(config.storageDir, 'uploads'),
+  filename(req, file, callback) {
+    const safe = file.originalname.replace(/[^a-zA-Z0-9._-]/g, '_');
+    callback(null, `${Date.now()}-${crypto.randomUUID()}-${safe}`);
+  }
+});
+
+function fileFilter(req, file, callback) {
+  const allowed = new Set([
+    'application/gpx+xml', 'application/xml', 'text/xml',
+    'image/jpeg', 'image/png', 'image/webp',
+    'audio/mpeg', 'audio/mp4', 'audio/x-m4a', 'audio/aac', 'audio/ogg', 'audio/wav', 'audio/webm'
+  ]);
+  const extension = path.extname(file.originalname).toLowerCase();
+  if (allowed.has(file.mimetype) || extension === '.gpx') return callback(null, true);
+  callback(new HttpError(415, `Dateityp nicht unterstützt: ${file.originalname}`));
+}
+
+export const upload = multer({
+  storage,
+  limits: { fileSize: config.maxUploadBytes, files: 25 },
+  fileFilter
+});