Nodejs extract zip ansynchronously

Question

I'm currently using adm-zip to extract a zip file to a certain path but its extractAllTo method is synchronous.

Is there a way I can extract zip files Asynchronously?

Answer 1

Try using the async-unzip library on npm: https://www.npmjs.com/package/async-unzip

This works in-memory, and is 100% asynchronous, this will get you the behavior you want =)

Here's an example:

var async = require('async'),
        path = require('path'),
        ZipFile = require('async-unzip').ZipFile,
        zipFile = new ZipFile('/home/user/Name.app.dSYM.zip'),
        noMoreFiles = false;

async.whilst(function () {
    return !noMoreFiles;
}, function (cb) {
    async.waterfall([
        function (cb) {
            zipFile.getNextEntry(cb);
        },
        function (entry, cb) {
            if (entry) {
                if (entry.isFile) {
                    var match = entry.filename.match(/^[^\/]+\.dSYM\/Contents\/Resources\/DWARF\/(.+)/);

                    if (match) {
                        console.log(match);
                        console.log(entry);

                        async.waterfall([
                            function (cb) {
                                entry.getData(cb);
                            },
                            function (data, cb) {
                                // `data` is a binary data of the entry.
                                console.log(data.length);

                                cb();
                            }
                        ], cb);
                    }
                }
            } else {
                noMoreFiles = true;
            }

            cb();
        }
    ], cb);
}, function () {
    // DO NOT FORGET to call `close()` to release the open file descriptor,
    // otherwise, you will quickly run out of file descriptors.
    zipFile.close();
    console.log(arguments);
});