untar.js

Here's a simple pure-javascript implementation of untar (it's mostly taken verbatim from Jeff Schiller's bitjs, but no longer in a webworker— though ironically I'm making this in order to stick it back in a webworker, but I digress).

Here's a basic usage, it seems to work alright.

var untar = require('untar.js');
var fs = require('fs');

var file = fs.readFileSync(__dirname + '/' + 'test.tar');
untar.untar(file).forEach(function(file){
    console.log(file.filename, file.fileData.length);
})

It's also possible to combine this with pako in order to decode tarballs

var untar = require('untar.js')
var pako = require('pako')
var fs = require('fs')

var unzipped = pako.inflate(fs.readFileSync(__dirname + '/' + 'with-5.0.0.tgz'));

untar.untar(unzipped).map(function(file){
	console.log(file.filename)
})

It's pretty minimal as far as APIs go, it exposes a single method untar which can be passed an ArrayBuffer. It returns a list of TarLocalFile objects. The important fields are size, filename, and fileData.

Changelog

• 0.2.3 — Fixing #2, thanks @jedie!
• 0.2.2 — Fixing more decode bugs
• 0.2.0 — Fixed a pretty major bug which led to decode errors from rounding to the wrong block.
• 0.1.0 — Initial Release