Download file from nodejs

download.js

const http = require('http');

function downloadFile(url) {
    return new Promise((resolve, reject) => {
        const chunks = [];
        const request = http.get(url, response => {
            response.on('data', chunk => {
                chunks.push(chunk);
            });
            response.on('end', () => {
                const file = new Buffer.concat(chunks).toString('base64');
                resolve(file);
            });
        });
        request.on('error', (error) => {
            logger.error(error.message);
            reject('Can\'t download file');
        });
    });
}