var req = request({
        method: 'GET',
        uri: file_url
    });

    var out = fs.createWriteStream(targetPath);
    req.pipe(out);

    req.on('response', function ( data ) {
        // Change the total bytes value to get progress later.
        total_bytes = parseInt(data.headers['content-length' ]);
    });

    req.on('data', function(chunk) {
        // Update the received bytes
        received_bytes += chunk.length;

        showProgress(received_bytes, total_bytes);
    });
    
function showProgress(received,total){    
    var percentage = (received * 100) / total;    
    var percentage_ = percentage.toString().split(".");
    process.stdout.write(percentage_[0] + "% | İnen: " + bytesToSize(received) + " Toplam: " + bytesToSize(total) + "r");
}