expressjsHow do I use adm-zip with Express.js?

Adm-zip is a Node.js module that allows you to create, read and extract zip files. It can be used with Express.js to zip files and folders for download.

To use adm-zip with Express.js, you need to install it as a dependency:

npm install adm-zip

Then, you can require it and use it in your Express.js code:

const express = require('express');
const AdmZip = require('adm-zip');

const app = express();

app.get('/download', (req, res, next) => {
  const zip = new AdmZip();
  zip.addFile('file1.txt', Buffer.alloc(30), 'Some content for file 1');
  zip.addFile('file2.txt', Buffer.alloc(30), 'Some content for file 2');
  const zipData = zip.toBuffer();

  res.set('Content-Type', 'application/zip');
  res.set('Content-Length', zipData.length);
  res.set('Content-Disposition', 'attachment; filename=files.zip');
  res.send(zipData);
});

app.listen(3000);

This code creates a new AdmZip object, adds two files to it and converts it to a buffer. Then, it sets the response headers and sends the zip file.

Code explanation

1. Install adm-zip: npm install adm-zip
2. Require adm-zip: const AdmZip = require('adm-zip');
3. Create a new AdmZip object: const zip = new AdmZip();
4. Add files to the zip object: zip.addFile('file1.txt', Buffer.alloc(30), 'Some content for file 1');
5. Convert the zip object to a buffer: const zipData = zip.toBuffer();
6. Set response headers: res.set('Content-Type', 'application/zip');
7. Send the buffer: res.send(zipData);

Helpful links

• adm-zip on npm
• adm-zip on GitHub

Edit this code on GitHub