Creating a zip file in Dart is not that hard. Though there are not many packages right now to work with, so far we have only two packages which we can use to create zip, tar and others in dart.
If you have not installed dart yet please go to my post here.
Visit Pub Dev where you can find all kinds of packages for Flutter and Dart. Some packages work with both Flutter and Dart but not all of them.
Go to https://pub.dev/ and search zip you will find these two packages
- Archive https://pub.dev/packages/archive, for Dart and Flutter.
- Flutter Archive https://pub.dev/packages/flutter_archive for only Flutter project.
In our case we will use the Archive package since we are testing in a console application.
The Archive library currently supports the following decoders:
- Zip (Archive)
- Tar (Archive)
- ZLib [Inflate decompression]
- GZip [Inflate decompression]
- BZip2 [decompression]
Add Archive package in your project
With Dart
dart pub add archive
With Flutter
flutter pub add archive
Our pubspec.yaml
name: Create zip file in dart
description: A sample command-line application to create zip file
version: 1.0.0
homepage: https://flutterframework.com/
environment:
sdk: '>=2.10.0 <3.0.0'
dependencies:
archive: ^3.1.2
dev_dependencies:
pedantic: ^1.9.0
test: ^1.14.4
Our main zip.dart
import 'package:zip/zip.dart' as zip;
void main(List<String> arguments) {
zip.createZip();
}
and lib/zip.dart
import 'dart:io';
import 'package:archive/archive.dart';
import 'package:archive/archive_io.dart';
void createZip() {
final logDir = Directory.current.path + '/log';
final zipLocation = Directory.current.path + '/log.zip';
var encoder = ZipFileEncoder();
encoder.zipDirectory(Directory(logDir), filename: zipLocation);
// Manually create a zip of a directory and individual files.
encoder.create(Directory.current.path + '/log2.zip');
encoder.addFile(File('another_file.txt'));
encoder.close();
}
Line number 10 creates a zip file in the destination file(line 8), from line 7 which is a directory containing few txt files.
You can create more zip file in the same encoder process, line 16 and more file line 17.