fix(XHRImpl): file:/// and IE9 bugs

Author: PatrickJS

modules/angular2/src/render/xhr_impl.ts

@@ -11,9 +11,22 @@ export class XHRImpl extends XHR {
  xhr.responseType = 'text';
 
  xhr.onload = function() {
- var status = xhr.status;
+ // responseText is the old-school way of retrieving response (supported by IE8 & 9)
+ // response/responseType properties were introduced in XHR Level2 spec (supported by IE10)
+ var response = ('response' in xhr) ? xhr.response : xhr.responseText;
+
+ // normalize IE9 bug (http://bugs.jquery.com/ticket/1450)
+ var status = xhr.status === 1223 ? 204 : xhr.status;
+
+ // fix status code when it is 0 (0 status is undocumented).
+ // Occurs when accessing file resources or on Android 4.1 stock browser
+ // while retrieving files from application cache.
+ if (status === 0) {
+ status = response ? 200 : 0;
+ }
+
  if (200 <= status && status <= 300) {
- completer.resolve(xhr.responseText);
+ completer.resolve(response);
  } else {
  completer.reject(`Failed to load ${url}`, null);
  }