Simple Upload Server

// 1. install npm
// 2. `npm install express multer`
// 3. node server.js

const express = require('express');
const multer = require('multer');
const path = require('path');

// Create an instance of express
const app = express();

// Set up multer for file storage
const storage = multer.diskStorage({
  destination: (req, file, cb) => {
    cb(null, 'uploads/'); // Specify the directory to save the uploaded files
  },
  filename: (req, file, cb) => {
    cb(null, Date.now() + path.extname(file.originalname)); // Append the current timestamp to the file name
  }
});

// Initialize multer with the storage configuration
const upload = multer({ storage: storage });

// Create the uploads directory if it doesn't exist
const fs = require('fs');
const dir = './uploads';
if (!fs.existsSync(dir)){
    fs.mkdirSync(dir);
}

// Define a POST route to handle file uploads
app.post('/upload', upload.single('file'), (req, res) => {
  if (!req.file) {
    return res.status(400).send('No file uploaded.');
  }
  res.send(`File uploaded successfully: ${req.file.filename}`);
});

// Start the server
const PORT = process.env.PORT || 3000;
app.listen(PORT, () => {
  console.log(`Server is running on http://localhost:${PORT}`);
});