Just looking for a simple solution to downloading and unzipping .zip
or .tar.gz
files in Node.js on any operating system.
Not sure if this is built in or I have to use a separate library. Any ideas? Looking for just a couple lines of code so when the next zip file comes that I want to download in node, it's a no brainer. Feel like this should be easy and/or built in, but I can't find anything. Thanks!
Checkout adm-zip
https://github.com/cthackers/adm-zip
ADM-ZIP is a pure JavaScript implementation for zip data compression for NodeJS.
The library allows you to:
decompress zip files directly to disk or in memory buffers compress files and store them to disk in .zip format or in compressed buffers update content of/add new/delete files from an existing .zip
Node has builtin support for gzip and deflate via the zlib module:
var zlib = require('zlib');
zlib.gunzip(gzipBuffer, function(err, result) {
if(err) return console.error(err);
console.log(result);
});
Edit: You can even pipe
the data directly through e.g. Gunzip
(using request):
var request = require('request'),
zlib = require('zlib'),
fs = require('fs'),
out = fs.createWriteStream('out');
// Fetch http://example.com/foo.gz, gunzip it and store the results in 'out'
request('http://example.com/foo.gz').pipe(zlib.createGunzip()).pipe(out);
For tar archives, there is Isaacs' tar module, which is used by npm.
Edit 2: Updated answer as zlib
doesn't support the zip
format. This will only work for gzip
.
yauzl is a robust library for unzipping. Design principles:
Currently has 97% test coverage.
Another working example:
var zlib = require('zlib');
var tar = require('tar');
var ftp = require('ftp');
var files = [];
var conn = new ftp();
conn.on('connect', function(e)
{
conn.auth(function(e)
{
if (e)
{
throw e;
}
conn.get('/tz/tzdata-latest.tar.gz', function(e, stream)
{
stream.on('success', function()
{
conn.end();
console.log("Processing files ...");
for (var name in files)
{
var file = files[name];
console.log("filename: " + name);
console.log(file);
}
console.log("OK")
});
stream.on('error', function(e)
{
console.log('ERROR during get(): ' + e);
conn.end();
});
console.log("Reading ...");
stream
.pipe(zlib.createGunzip())
.pipe(tar.Parse())
.on("entry", function (e)
{
var filename = e.props["path"];
console.log("filename:" + filename);
if( files[filename] == null )
{
files[filename] = "";
}
e.on("data", function (c)
{
files[filename] += c.toString();
})
});
});
});
})
.connect(21, "ftp.iana.org");
var readPath ="read file location";
var writePath="Write file location ";
fs.createReadStream(reNameReadPath).pipe(unzip.Extract({ path: writePath }));
please see the following link
http://nodejs.org/api/fs.html#fs_fs_renamesync_oldpath_newpath
11/2014: Unfortunately the situation is that there is no good solution to unzipping files in nodejs. There are few libraries each with number of major issues open and contribution stopped long time ago.