Percentage bar for file downloading

[mehrdd]

Hi,
Can i use node-webkit to download files with percentage ? something like google chrome download manager or some help with javascript/node ..

in this application, users have an option to download mp3 files ..
is there any way to show a percentage-bar after save-dialog ?
thank you.

[timonsku]

Depends on how you download the file but I solved it this way with a http download:

function download(file_url){
    var fs = require('fs');
    var url = require('url');
    var http = require('http');

    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('./' + file_name);

    http.get(options, function(res) {
        var fsize = res.headers['content-length'];
        res.on('data', function(data) {
                file.write(data);
                progress(100-(((fsize-file.bytesWritten)/fsize)*100), $('#progressBar'));
            }).on('end', function() {
                file.end();
            });
        });
}
function progress(percent, $element) {
    console.log("Download: "+parseInt(percent)+" %")
    var progressBarWidth = percent * $element.width() / 100;
    $element.find('div').css( "width", progressBarWidth );
}

Hope that helps you. Gave me some headache aswell to get a proper status bar going.

[mehrdd]

Thank you very much !
i made some changes to use it with 'save file' with save dialog ..
createWriteStream ... such a nice method !