How To Work With Zip Files in Node.js

Working with zip files in Node.js involves using third-party libraries as Node.js doesn't provide built-in support for zip file manipulation. One of the popular libraries for handling zip files in Node.js is adm-zip. Below are the steps to work with zip files using adm-zip:

1. Install adm-zip:

   You can install adm-zip using npm:

                   
                       npm install adm-zip
                   
               

2. Extracting Files from a Zip Archive:

                   
                       const AdmZip = require('adm-zip');
   
                       // Load a zip file
                       const zip = new AdmZip('example.zip');
                       
                       // Extract all files to the specified directory
                       zip.extractAllTo(/* target path */, /* overwrite */ true);                    
                   
               

3. Adding Files to a Zip Archive:

                   
                       const AdmZip = require('adm-zip');
   
                       // Create a new zip file
                       const zip = new AdmZip();
                       
                       // Add a file
                       zip.addFile(/* file name */, /* Buffer or content */, /* comment */);
                       
                       // Save the zip file
                       zip.writeZip(/* target path */);                    
                   
               

4. Reading Contents of a Zip Archive:

                   
                       const AdmZip = require('adm-zip');
   
                       // Load a zip file
                       const zip = new AdmZip('example.zip');
                       
                       // Get an array of zip entries
                       const zipEntries = zip.getEntries();
                       
                       // Display the contents
                       zipEntries.forEach(zipEntry => {
                           console.log(zipEntry.entryName);
                       });                    
                   
               

5. Extracting a Specific File from a Zip Archive:

                   
                       const AdmZip = require('adm-zip');
   
                       // Load a zip file
                       const zip = new AdmZip('example.zip');
                       
                       // Extract a specific file
                       const zipEntry = zip.getEntry(/* file name */);
                       if (zipEntry) {
                           zip.extractEntryTo(zipEntry, /* target path */, /* maintainEntryPath */ true, /* overwrite */ true);
                       }                    
                   
               

   Example:

   Extracting all files from a zip archive:

                   
                       const AdmZip = require('adm-zip');
   
                       const zip = new AdmZip('example.zip');
                       zip.extractAllTo('extracted_files', true);                    
                   
               

   Adding files to a zip archive:

                   
                       const AdmZip = require('adm-zip');
                       const fs = require('fs');
                       
                       const zip = new AdmZip();
                       const buffer = fs.readFileSync('file.txt');
                       zip.addFile('file.txt', buffer, 'This is a comment');
                       zip.writeZip('example.zip');                    
                   
               

   Reading contents of a zip archive:

                   
                       const AdmZip = require('adm-zip');
   
                       const zip = new AdmZip('example.zip');
                       const zipEntries = zip.getEntries();
                       zipEntries.forEach(zipEntry => {
                           console.log(zipEntry.entryName);
                       });                    
                   
               

With adm-zip, you can easily manipulate zip files in Node.js, including extracting, adding, and reading files from zip archives.

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