testingbot-tunnel-launcher/build/downloader.js

A wrapper around TestingBot's Tunnel

'use strict';

var https = require('https');
var fs = require('fs');

/**
 * Downloads a file from the given URL to the specified destination.
 * @param {string} url - The URL to download the file from.
 * @param {Object} options - The options object containing the destination.
 * @param {Function} cb - The callback function to handle success or error.
 */
exports.get = function (url, options, cb) {
    var dest = options.destination;

    https.get(url, function (response) {
        if (response.statusCode >= 400) {
            return cb(new Error('Could not download ' + url + ', statusCode: ' + response.statusCode.toString()), null);
        }

        var file = fs.createWriteStream(dest);
        response.pipe(file);
        file.on('finish', function () {
            file.close();
            cb(null, dest);
        });
        file.on('error', function (err) {
            fs.unlink(dest, function () {});
            cb(err, null);
        });
    }).on('error', function (err) {
        cb(err, null);
    });
};