node-7z

A Node.js wrapper for 7-Zip, originally developed by @quentinrossetti and forked for the purpose of setting path to 7zip executable.

Copy of original README: Usage

I chose to use Promises in this library. API is consistent with standard use:

var Zip = require('node-7z'); // Name the class as you want!
var myTask = new Zip();
myTask.extractFull('myArchive.7z', 'destination', { p: 'myPassword' })

// Equivalent to `on('data', function (files) { // ... });`
.progress(function (files) {
  console.log('Some files are extracted: %s', files);
});

// When all is done
.then(function () {
  console.log('Extracting done!');
});

// On error
.catch(function (err) {
  console.error(err);
});

Installation

You must have the 7za executable available in your PATH or in the same directory of your package.json file.

On Debian an Ubuntu install the p7zip-full package.

On Windows use the 7za.exe (link here) binary.

On Mac OSX use Homebrew brew install p7zip

npm install --save node-7z

API

See the 7-Zip documentation for the full list of usages and options (switches).

The type of the list of files can be either String or Array.

Add: Zip.add

Arguments

• archive Path to the archive you want to create.
• files The file list to add.
• options An object of options (7-Zip switches).

Progress

• files A array of all the extracted files AND directories. The / character is used as a path separator on every platform.

Error

• err An Error object.

Delete: Zip.delete

Arguments

• archive Path to the archive you want to delete files from.
• files The file list to delete.
• options An object of options (7-Zip switches).

Error

• err An Error object.

Extract: Zip.extract

Arguments

• archive The path to the archive you want to extract.
• dest Where to extract the archive.
• options An object of options.

Progress

• files A array of all the extracted files AND directories. The / character is used as a path separator on every platform.

Error

• err An Error object.

Extract with full paths: Zip.extractFull

Arguments

• archive The path to the archive you want to extract.
• dest Where to extract the archive (creates folders for you).
• options An object of options.

Progress

• files A array of all the extracted files AND directories. The / character is used as a path separator on every platform.

Error

• err An Error object.

List contents of archive: Zip.list

Arguments

• archive The path to the archive you want to analyse.
• options An object of options.

Progress

• files A array of objects of all the extracted files AND directories. The / character is used as a path separator on every platform. Object's properties are: date, attr, size and name.

Fulfill

• spec An object of tech spec about the archive. Properties are: path, type, method, physicalSize and headersSize (Some of them may be missing with non-7z archives).

Error

• err An Error object.

Test integrity of archive: Zip.test

Arguments

• archive The path to the archive you want to analyse.
• options An object of options.

Progress

• files A array of all the extracted files AND directories. The / character is used as a path separator on every platform.

Error

• err An Error object.

Update: Zip.update

Arguments

• archive Path to the archive you want to update.
• files The file list to update.
• options An object of options (7-Zip switches).

Progress

• files A array of all the extracted files AND directories. The / character is used as a path separator on every platform.

Error

• err An Error object.

Advanced usage

Compression method

With the 7za binary compression is made like that:

# adds *.exe and *.dll files to solid archive archive.7z using LZMA method
# with 2 MB dictionary and BCJ filter.
7z a archive.7z *.exe -m0=BCJ -m1=LZMA:d=21

With node-7z you can translate it like that:

var archive = new Zip();
archive.add('archive.7z', '*.exe', {
  m0: '=BCJ',
  m1: '=LZMA:d=21'
})
.then(function () {
  // Do stuff...
});

Add, delete and update multiple files

When adding, deleting or updating archives you can pass either a string or an array as second parameter (the files parameter).

var archive = new Zip();
archive.delete('bigArchive.7z', [ 'file1', 'file2' ])
.then(function () {
  // Do stuff...
});

Wildcards

You can extract with wildcards to specify one or more file extensions. To do this add a wildcards attribute to the options object. The wildcard attribute takes an Array as value. In this array each item is a wildcard.

var archive = new Zip();
archive.extractFull('archive.zip', 'destination/', {
  wildcards: [ '*.txt', '*.md' ], // extract all text and Markdown files
  r: true // in each subfolder too
})
.progress(function (files) {
  // Do stuff with files...
})
.then(function () {
  // Do stuff...
});

Note that the r (for recursive) attribute is passed in this example.

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With ❤️ from quentinrossetti