Downloading file in node.js into user specified path - angularjs

Question

i'm trying to download file using node.js and this is my code:
var file_url = req.body.filename;
var DOWNLOAD_DIR = './downloads/';
var options = {
host: url.parse(file_url).host,
port: 80,
path: url.parse(file_url).pathname
};
var file_name = url.parse(file_url).pathname.split('/').pop();
var file = fs.createWriteStream(DOWNLOAD_DIR + file_name);
http.get(options, function (resp) {
resp.on('data', function (data) {
file.write(data);
}).on('end', function () {
file.end();
console.log(file_name + ' downloaded to ' + DOWNLOAD_DIR);
delet(file_url);
});
});
here i'm giving DOWNLOAD_DIR manually so it is downloading to that
directory as it is localhost not a problem, but when i'm uploading this
code into server then the file should be downloaded to that particular
user's machine, so how to give path dynamically to DOWNLOAD_DIR variable

Answer 1

if the Downloads folder is in home directory (and you want to download in Downloads folder), then you can use
var path = require('path');
var file_url = req.body.filename;
var DOWNLOAD_DIR = path.join(process.env.HOME || process.env.USERPROFILE, 'downloads/');
var file_name = url.parse(file_url).pathname.split('/').pop();
var file_path = path.join(DOWNLOAD_DIR,file_name);
var file = fs.createWriteStream(file_path);
PS: While dealing with paths and files, always use path module of nodejs to generate path.