CODEWITHSUNDEEP
node.jsexpressunzip
Vytalyi
Vytalyi

Reputation: 1695

Return number of files at ZIP package with NodeJS

Here is my function to get number of files within a ZIP package.

// check if .ZIP package contains at least one HTML file and return number of files
function validateArchive(path, callback) {
    var filesCount = 0;

    var unzipParser = unzip.Parse();
    var readStream = fs.createReadStream(path).pipe(unzipParser);
    unzipParser.on('error', function(err) {
        throw err;
    });

    readStream.on('entry', function (entry) {
        var fileName = entry.path;
        var type = entry.type; // 'Directory' or 'File'
        if (type == 'File') {
            var fext = fileName.split('.')[1];
            if (fext === 'html') {
                filesCount++;
            }
        }
        entry.autodrain();
    });

    // returns number of files
    setTimeout(function () {
        callback(filesCount);
    }, 1000);
}

As you can see I have a problem with returning number of files because asynchronous process in place.

Any ideas hot to return number of files without using setTimeout method?

Upvotes: 1

Views: 1063

Answers (1)

soulcheck
soulcheck

Reputation: 36777

You can listen to the close event:

unzipParser.on('close', function() {
    callback(filesCount);
});

which is emitted when the end of zip is reached.

Upvotes: 5

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