multer

import express from 'express'; import multer from 'multer'; import path from 'path'; import { fileURLToPath } from 'url'; import { dirname } from 'path'; import fs from 'fs'; const __filename = fileURLToPath(import.meta.url); const __dirname = dirname(__filename); const app = express(); const PORT = process.env.PORT || 3000; // Ensure the uploads directory exists const uploadsDir = path.join(__dirname, 'uploads'); if (!fs.existsSync(uploadsDir)) { fs.mkdirSync(uploadsDir); } // Configure disk storage for Multer const storage = multer.diskStorage({ destination: (req, file, cb) => { cb(null, uploadsDir); }, filename: (req, file, cb) => { cb(null, Date.now() + '-' + file.originalname); } }); const upload = multer({ storage: storage, limits: { fileSize: 5 * 1024 * 1024 } }); // 5MB limit // Basic HTML form for upload app.get('/', (req, res) => { res.send(` <form action="/upload-profile" method="post" enctype="multipart/form-data"> <input type="file" name="avatar" /> <button type="submit">Upload Avatar</button> </form> `); }); // Route to handle single file upload app.post('/upload-profile', upload.single('avatar'), (req, res) => { if (!req.file) { return res.status(400).send('No file uploaded.'); } res.send(`File uploaded successfully: ${req.file.filename}`); }); // Global error handler for Multer errors app.use((err, req, res, next) => { if (err instanceof multer.MulterError) { return res.status(500).send(`Multer error: ${err.message}`); } else if (err) { return res.status(500).send(`Unknown error: ${err.message}`); } next(); }); app.listen(PORT, () => { console.log(`Server running on http://localhost:${PORT}`); });