node js file dowload progress bar
function download(url, callback, encoding){
var request = http.get(url, function(response) {
if (encoding){
response.setEncoding(encoding);
}
var len = parseInt(response.headers['content-length'], 10);
var body = "";
var cur = 0;
var obj = document.getElementById('js-progress');
var total = len / 1048576; //1048576 - bytes in 1Megabyte
response.on("data", function(chunk) {
body += chunk;
cur += chunk.length;
obj.innerHTML = "Downloading " + (100.0 * cur / len).toFixed(2) + "% " + (cur / 1048576).toFixed(2) + " mb\r" + ".<br/> Total size: " + total.toFixed(2) + " mb";
});
response.on("end", function() {
callback(body);
obj.innerHTML = "Downloading complete";
});
request.on("error", function(e){
console.log("Error: " + e.message);
});
});
};