Fix TypeError in script.js and add static file serving to proxy

proxy-server.js

@@ -10,6 +10,9 @@ const url = require('url');
 const cluster = require('cluster');
 const numCPUs = require('os').cpus().length;
 
+const fs = require('fs');
+const path = require('path');
+
 const PORT = process.env.PORT || 3000;
 
 // Configuration
@@ -114,6 +117,36 @@ if (cluster.isMaster) {
             return;
         }
 
+        // Serve static files for the UI
+        if (req.method === 'GET' && (req.url === '/' || req.url === '/index.html' || req.url === '/script.js' || req.url.startsWith('/script.js?') || req.url === '/styles.css' || req.url === '/worker.js')) {
+            let requestPath = req.url.split('?')[0];
+            let filePath = '.' + requestPath;
+            if (requestPath === '/') filePath = './index.html';
+
+            const extname = path.extname(filePath);
+            let contentType = 'text/html';
+            switch (extname) {
+                case '.js': contentType = 'text/javascript'; break;
+                case '.css': contentType = 'text/css'; break;
+            }
+
+            fs.readFile(filePath, (error, content) => {
+                if (error) {
+                    if (error.code == 'ENOENT') {
+                        res.writeHead(404);
+                        res.end('File not found');
+                    } else {
+                        res.writeHead(500);
+                        res.end('Error loading file: ' + error.code);
+                    }
+                } else {
+                    res.writeHead(200, { 'Content-Type': contentType });
+                    res.end(content, 'utf-8');
+                }
+            });
+            return;
+        }
+
         // Only allow POST requests to the proxy
         if (req.method !== 'POST') {
             res.writeHead(405, { 'Content-Type': 'application/json' });

script.js

@@ -69,6 +69,7 @@ class StressTestingTool {
       userErrorData: [],
       errorThreshold: null,
       lastUiUpdate: 0,
+      visitedUrls: new Set(),
 
       // Enhanced metrics
       errorsByCategory: {
@@ -772,11 +773,8 @@ class StressTestingTool {
     this.state.requestHistory = [];
     this.state.percentiles = { p50: 0, p95: 0, p99: 0 };
 
-    // Reset crawler
-    this.crawler.reset();
-    if (this.config.crawlerEnabled) {
-      this.crawler.urlQueue.push(this.config.targetUrl);
-    }
+    // Reset state variables
+    this.state.visitedUrls.clear();
 
     // Reset charts
     this.charts.rps.data.labels = [];
@@ -842,6 +840,7 @@ class StressTestingTool {
       this.state.workerStats.set(workerId, message.data);
       this.aggregateStats();
     } else if (message.type === 'LOG') {
+      this.state.visitedUrls.add(message.data.url);
       this.addToRequestHistory(message.data);
     }
   }
@@ -1217,7 +1216,7 @@ class StressTestingTool {
     };
 
     if (this.config.crawlerEnabled) {
-      results["Unique URLs Visited"] = this.crawler.visitedUrls.size;
+      results["Unique URLs Visited"] = this.state.visitedUrls.size;
     }
 
     return results;