Merge pull request #115 from adaptlearning/issue/#108

Issue/#108

Author: chris-steele

lib/RepositoryDownloader.js

@@ -18,30 +18,24 @@ var RepositoryDownloader = function(options) {
 RepositoryDownloader.prototype.fetch = function(destination) {
     var deferred = Q.defer(),
         download = require('download'),
-        totalSize,
-        receivedSize,
         previousPercent = 0,
         fileName = '';
 
     download(this.url, destination, {
         extract: true
     })
     .on('response', function (response) {
-        totalSize = Number(response.headers['content-length']);
         fileName = getFileName(response.headers['content-disposition']);
-        receivedSize = 0;
     })
-    .on('data', function(data) {
-        receivedSize += data.length;
-
+    .on('downloadProgress', function(progress) {
         var state = {
-            receivedSize: receivedSize,
-            percent: totalSize ? Math.round(receivedSize / totalSize * 100) : null
+            receivedSize: progress.transferred,
+            percent: Math.round(progress.transferred / progress.total * 100)
         };
 
         if(state.percent > previousPercent) {
             previousPercent = state.percent;
-            deferred.notify(state, data);
+            deferred.notify(state, progress);
         }
     })
     .on('error', function(err) {