Merge pull request #440 from kenvunz/patch-2

Add exception for file protocol request

lib/adapters/xhr.js

@@ -55,7 +55,9 @@ module.exports = function xhrAdapter(config) {
 
       // The request errored out and we didn't get a response, this will be
       // handled by onerror instead
-      if (request.status === 0) {
+      // With one exception: request that using file: protocol, most browsers
+      // will return status as 0 even though it's a successful request
+      if (request.status === 0 && request.responseURL.indexOf('file:') !== 0) {
         return;
       }