Add Security Middleware (Helmet, CORS)

apps/backend/index.ts

@@ -0,0 +1 @@
+console.log("Hello via Bun!");

apps/backend/package.json

@@ -1,4 +1,5 @@
 {
+
   "name": "backend",
   "module": "index.ts",
   "dependencies": {
@@ -22,15 +23,17 @@
     "eslint-config-prettier": "^10.1.8",
     "prettier": "^3.6.2",
     "ts-node": "^10.9.2",
-    "typescript": "5.8.3",
+    "typescript": "^5.8.3",
     "typescript-eslint": "^8.30.0"
   },
   "private": true,
   "scripts": {
     "dev": "bun run --watch src/index.ts",
     "build": "bun build src/index.ts --outdir ./dist --target node",
     "lint": "bun eslint src/**/*.ts",
-    "format": "bun prettier --write 'src/**/*.ts'"
+    "format": "bun prettier --write 'src/**/*.ts'",
+    "setup": "bun run scripts/setup.ts",
+    "clean": "bun run scripts/clean.ts"
   },
   "type": "module"
 }

apps/backend/scripts/clean.ts

@@ -0,0 +1,15 @@
+import { fileManager } from '../src/utils/fileManager';
+
+async function main() {
+  const customPath = process.argv[2];
+
+  try {
+    await fileManager.cleanupProject(customPath);
+    console.log(' Cleanup completed successfully');
+  } catch (error) {
+    console.error(' Cleanup failed:', error instanceof Error ? error.message : error);
+    process.exit(1);
+  }
+}
+
+await main();

apps/backend/scripts/setup.ts

@@ -0,0 +1,17 @@
+import { fileManager } from '../src/utils/fileManager';
+
+async function main() {
+  try {
+    const projectPath = await fileManager.setupProject();
+    console.log('Project created at:', projectPath);
+    console.log('\nTo clean up later, run:');
+    console.log('bun run clean');
+    console.log('or to clean a specific path:');
+    console.log('bun run clean -- /path/to/project');
+  } catch (error) {
+    console.error('Setup failed:', error instanceof Error ? error.message : error);
+    process.exit(1);
+  }
+}
+
+await main();

apps/backend/src/index.ts

@@ -1,9 +1,46 @@
 import express from 'express';
+import helmet from 'helmet';
+import cors from 'cors';
 import { setupProject, getSanitizedDirName, createRustProject } from './utils/fileManager';
 
 const app = express();
+
+// Security middleware
+app.use(
+  helmet({
+    contentSecurityPolicy: {
+      directives: {
+        defaultSrc: ["'self'"],
+        styleSrc: ["'self'", "'unsafe-inline'"],
+        scriptSrc: ["'self'"],
+        imgSrc: ["'self'", 'data:', 'https:'],
+      },
+    },
+    crossOriginEmbedderPolicy: false,
+    hsts: {
+      maxAge: 31536000,
+      includeSubDomains: true,
+      preload: true,
+    },
+  })
+);
+
+// CORS configuration
+app.use(
+  cors({
+    origin: 'http://localhost:4200',
+    credentials: true,
+    methods: ['GET', 'POST', 'PUT', 'DELETE', 'OPTIONS'],
+    allowedHeaders: ['Content-Type', 'Authorization', 'Accept'],
+    optionsSuccessStatus: 200,
+  })
+);
+
+// Body parsing middleware
 app.use(express.json());
+app.use(express.urlencoded({ extended: true }));
 
+// Routes
 app.get('/', (_, res) =>
   res.send('Hello from Backend!' + '<br>' + 'The best online soroban compiler is coming...')
 );
@@ -45,4 +82,24 @@ app.post('/api/test-filemanager', async (req, res) => {
   }
 });
 
-app.listen(3000, () => console.log('Server on http://localhost:3000'));
+// Error handling middleware
+app.use((err: Error, req: express.Request, res: express.Response, next: express.NextFunction) => {
+  res.status(500).json({
+    error: 'Internal Server Error',
+    message: process.env.NODE_ENV === 'development' ? err.message : 'Something went wrong',
+  });
+});
+
+// 404 handler
+app.use((req, res) => {
+  res.status(404).json({
+    error: 'Not Found',
+    message: `Route ${req.originalUrl} not found`,
+  });
+});
+
+// Start server
+app.listen(3000, () => {
+  console.log('Server on http://localhost:3000');
+  console.log('CORS restricted to http://localhost:4200');
+});