Upgrade Puppeteer to v24.x for better PDF generation

- Upgrade puppeteer from 22.0.0 to 24.x (latest)
- Update browser launch configuration for Puppeteer 24.x compatibility
- Add auto-detection for system Chrome vs bundled Chrome
- Update documentation with changelog

README.md

@@ -13,8 +13,17 @@ short_description: Backend server for AI Chat Exporter and personal web tools.
 # Universal Backend Service for Chrome Extensions
 
 This generic backend service provides:
-- **PDF Generation**: High-fidelity HTML-to-PDF conversion using WeasyPrint (with CJK font support).
-- **Extensible**: Ready to add more Python-based utilities.
+- **PDF Generation**: High-fidelity HTML-to-PDF conversion using Puppeteer (Chrome-based).
+- **Extensible**: Ready to add more utilities.
+
+## Changelog
+
+### v1.1.0 (2026-02-12)
+- **Upgraded Puppeteer**: 22.0.0 → 24.x (Latest)
+  - Chrome for Testing integration
+  - Better headless mode support
+  - Potential PDF image compression improvements
+- **Improved browser detection**: Auto-detect system Chrome or use bundled version
 
 ## Deployment
 Deployed via Docker on Hugging Face Spaces.

package.json

@@ -1,12 +1,12 @@
 
 {
   "name": "pdf-server",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "description": "Puppeteer PDF Generator for Hugging Face Spaces",
   "main": "server.js",
   "dependencies": {
     "express": "^4.18.2",
-    "puppeteer": "^22.0.0",
+    "puppeteer": "^24.0.0",
     "cors": "^2.8.5"
   },
   "scripts": {

server.js

@@ -48,9 +48,9 @@ app.post('/api/generate_pdf', async (req, res) => {
     console.log(`[PDF-GEN] Calculated wait times: base=${baseWaitTime}ms, size=${sizeWaitTime}ms, total=${totalWaitTime}ms`);
 
     // Launch Chrome
-    // We use the installed 'chromium' from apt-get
-    browser = await puppeteer.launch({
-      executablePath: '/usr/bin/chromium',
+    // Puppeteer 24.x uses Chrome for Testing by default
+    // If chromium is installed via apt-get, use it; otherwise Puppeteer will download Chrome
+    const launchOptions = {
       args: [
         '--no-sandbox',
         '--disable-setuid-sandbox',
@@ -60,8 +60,26 @@ app.post('/api/generate_pdf', async (req, res) => {
         '--disable-software-rasterizer',
         '--memory-pressure-off'
       ],
-      headless: 'new'
-    });
+      headless: true
+    };
+    
+    // Try to use system chromium if available, otherwise use bundled Chrome
+    try {
+      const fs = require('fs');
+      if (fs.existsSync('/usr/bin/chromium')) {
+        launchOptions.executablePath = '/usr/bin/chromium';
+        console.log('[PDF-GEN] Using system Chromium');
+      } else if (fs.existsSync('/usr/bin/google-chrome')) {
+        launchOptions.executablePath = '/usr/bin/google-chrome';
+        console.log('[PDF-GEN] Using system Google Chrome');
+      } else {
+        console.log('[PDF-GEN] Using bundled Chrome for Testing');
+      }
+    } catch (e) {
+      console.log('[PDF-GEN] Using bundled Chrome for Testing');
+    }
+    
+    browser = await puppeteer.launch(launchOptions);
 
     const page = await browser.newPage();