Extract zip file to local folder

Question

I have node app with express and im sending request from client like postman and I need to get the file from the req and extract it on my local folder,how I can do that ?

I found the following open source but not sure how to take the req body and extract it in my local folder like "C://Test//extractDest",

The code below is taken from the following open source but if there is other good open source for this I can use it instead https://www.npmjs.com/package/decompress-zip

var DecompressZip = require('decompress-zip');
var unzipper = new DecompressZip(filename)

unzipper.on('error', function (err) {
    console.log('Caught an error');
});

unzipper.on('extract', function (log) {
    console.log('Finished extracting');
});

unzipper.on('progress', function (fileIndex, fileCount) {
    console.log('Extracted file ' + (fileIndex + 1) + ' of ' + fileCount);
});

unzipper.extract({
    path: "C://Test//extractDest",
    filter: function (file) {
        return file.type !== "SymbolicLink";
    }
});

This is how I send the zip file I simply select binary and choose a zip file

Answer 1

I'd recommend you using multer which works with multipart/form-data content-type.

Here's a basic working example. It assumes we are only uploading a single file, a folder named "uploads" exists at the root of your project and a form field named "singleFileUpload" to hold your data. You can change all those following the multer documentation:

var path     = require("path");
var express  = require("express");
var multer   = require("multer");
var Unzipper = require("decompress-zip");


var app = express();

app.use(multer({dest:'./uploads/'}).single('singleFileUpload'));


app.post("/", function(req, res){

    if (req.file){

        var filepath = path.join(req.file.destination, req.file.filename);
        var unzipper = new Unzipper(filepath);

        unzipper.on("extract", function () {
            console.log("Finished extracting");
        });

        unzipper.extract({ path: "C://Test//extractDest"});
    }

    res.status(204).end();
});


app.listen(3000);

Using postman you can now upload and decompress files with this configuration: