build: install frontend project dependencies.

backend/index.js

@@ -0,0 +1,72 @@
+import express from 'express';
+import cors from 'cors';
+import multer from 'multer';
+import fs from 'fs';
+import path from 'path';
+import { fileURLToPath } from 'url';
+import { parsePcap } from './pcapAnalyzer.js';
+import { generatePDFReport } from './pdfGenerator.js';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+const app = express();
+const port = 3001;
+
+app.use(cors());
+app.use(express.json());
+
+const upload = multer({ dest: path.join(__dirname, 'uploads/') });
+
+// Ensure uploads dir exists
+if (!fs.existsSync(path.join(__dirname, 'uploads'))) {
+  fs.mkdirSync(path.join(__dirname, 'uploads'));
+}
+
+app.post('/api/analyze', upload.single('pcap'), async (req, res) => {
+  try {
+    if (!req.file) {
+      return res.status(400).json({ error: 'No PCAP file uploaded' });
+    }
+
+    const { blockedApps = '[]', blockedIPs = '[]', blockedDomains = '[]' } = req.body;
+
+    // Parse the PCAP
+    const analysisResult = await parsePcap(
+      req.file.path,
+      JSON.parse(blockedApps),
+      JSON.parse(blockedIPs),
+      JSON.parse(blockedDomains)
+    );
+
+    // Clean up uploaded file
+    fs.unlinkSync(req.file.path);
+
+    res.json(analysisResult);
+  } catch (error) {
+    console.error('Analysis error:', error);
+    res.status(500).json({ error: 'Failed to analyze PCAP file: ' + error.message });
+  }
+});
+
+app.post('/api/report/pdf', async (req, res) => {
+  try {
+    const analysisData = req.body;
+    if (!analysisData || !analysisData.stats) {
+      return res.status(400).json({ error: 'Invalid analysis data' });
+    }
+
+    const pdfBytes = await generatePDFReport(analysisData);
+
+    res.setHeader('Content-Type', 'application/pdf');
+    res.setHeader('Content-Disposition', 'attachment; filename=DPI_Engine_Report.pdf');
+    res.send(Buffer.from(pdfBytes));
+  } catch (error) {
+    console.error('PDF generation error:', error);
+    res.status(500).json({ error: 'Failed to generate PDF report: ' + error.message });
+  }
+});
+
+app.listen(port, () => {
+  console.log(`DPI Engine Backend API running on http://localhost:${port}`);
+});