expressjsHow do I download a zip file using Express.js?

To download a zip file using Express.js, you need to use the res.download() function.

The code below shows an example of how to use res.download() to download a zip file.

// Import the Express module
const express = require('express');

// Create an Express application
const app = express();

// Create a route
app.get('/download', (req, res) => {
  // Set the file path
  const filePath = './myZipFile.zip';
  // Set the file name
  const fileName = 'myZipFile.zip';

  // Use res.download() to download the file
  res.download(filePath, fileName);
});

// Start the server
app.listen(3000, () => console.log('Server listening on port 3000!'));

The output of the code above will be:

Server listening on port 3000!

When a request is made to http://localhost:3000/download, the file myZipFile.zip will be downloaded.

Code explanation

1. require('express'): This imports the Express module.
2. const app = express(): This creates an Express application.
3. app.get('/download', (req, res) => { ... }): This creates a route which will handle the download request.
4. const filePath = './myZipFile.zip': This sets the file path of the zip file.
5. const fileName = 'myZipFile.zip': This sets the file name of the zip file.
6. res.download(filePath, fileName): This uses the Express res.download() function to download the zip file.
7. app.listen(3000, () => console.log('Server listening on port 3000!')): This starts the server on port 3000.

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