server file

server.js

@@ -0,0 +1,104 @@
+// server.js
+const express = require('express');
+const multer = require('multer');
+const path = require('path');
+const fs = require('fs');
+const qrcode = require('qrcode');
+const sharp = require('sharp');
+const { createCanvas, loadImage } = require('canvas');
+const pdf = require('pdf-lib');
+const fontkit = require('@pdf-lib/fontkit');
+
+const app = express();
+const upload = multer({ dest: 'uploads/' });
+
+app.use(express.static('public'));
+
+app.post('/generate-qr-code', upload.single('logo'), async (req, res) => {
+  const url = req.body.url;
+  const logoPath = req.file.path;
+
+  try {
+    const qrCodeData = await qrcode.toDataURL(url);
+    const qrCodeImage = await loadImage(Buffer.from(qrCodeData.split(',')[1], 'base64'));
+
+    const logoImage = await loadImage(logoPath);
+    const canvasWidth = qrCodeImage.width;
+    const canvasHeight = qrCodeImage.height;
+    const logoSize = Math.min(canvasWidth / 4, canvasHeight / 4);
+
+    const canvas = createCanvas(canvasWidth, canvasHeight);
+    const ctx = canvas.getContext('2d');
+
+    ctx.drawImage(qrCodeImage, 0, 0, canvasWidth, canvasHeight);
+    ctx.drawImage(logoImage, canvasWidth / 2 - logoSize / 2, canvasHeight / 2 - logoSize / 2, logoSize, logoSize);
+
+    const buffer = canvas.toBuffer('image/png');
+    res.set('Content-Type', 'image/png');
+    res.send(buffer);
+  } catch (error) {
+    console.error('Error generating QR code:', error);
+    res.status(500).send('Error generating QR code');
+  } finally {
+    fs.unlinkSync(logoPath);
+  }
+});
+
+app.get('/download-qr-code', async (req, res) => {
+    const format = req.query.format;
+
+    try {
+      const qrCodeData = await qrcode.toDataURL('https://example.com');
+      const qrCodeImage = await loadImage(Buffer.from(qrCodeData.split(',')[1], 'base64'));
+
+      const logoImage = await loadImage('path/to/your/logo.png');
+      const canvasWidth = qrCodeImage.width;
+      const canvasHeight = qrCodeImage.height;
+      const logoSize = Math.min(canvasWidth / 4, canvasHeight / 4);
+
+      const canvas = createCanvas(canvasWidth, canvasHeight);
+      const ctx = canvas.getContext('2d');
+
+      ctx.drawImage(qrCodeImage, 0, 0, canvasWidth, canvasHeight);
+      ctx.drawImage(logoImage, canvasWidth / 2 - logoSize / 2, canvasHeight / 2 - logoSize / 2, logoSize, logoSize);
+
+      if (format === 'png') {
+        res.set('Content-Type', 'image/png');
+        res.set('Content-Disposition', 'attachment; filename="qr-code.png"');
+        canvas.createPNGStream().pipe(res);
+      } else if (format === 'pdf') {
+        res.set('Content-Type', 'application/pdf');
+        res.set('Content-Disposition', 'attachment; filename="qr-code.pdf"');
+
+        const pdfDoc = await pdf.PDFDocument.create();
+        const pdfBytes = await pdfDoc.embedPng(canvas.toBuffer());
+        const pdfImage = await pdfDoc.embedPng(pdfBytes);
+        const page = pdfDoc.addPage();
+        page.drawImage(pdfImage, {
+          x: 0,
+          y: 0,
+          width: page.getWidth(),
+          height: page.getHeight(),
+        });
+
+        const pdfBytes = await pdfDoc.save();
+        res.end(pdfBytes);
+      } else if (format === 'svg') {
+        res.set('Content-Type', 'image/svg+xml');
+        res.set('Content-Disposition', 'attachment; filename="qr-code.svg"');
+
+        const svgData = canvas.toDataURL('image/svg+xml');
+        res.send(svgData.slice(svgData.indexOf(',') + 1));
+      } else {
+        res.status(400).send('Invalid format');
+      }
+    } catch (error) {
+      console.error('Error generating QR code:', error);
+      res.status(500).send('Error generating QR code');
+    }
+  });
+
+  const PORT = process.env.PORT || 3000;
+  app.listen(PORT, () => {
+    console.log(`Server is running on port ${PORT}`);
+  });