From 8ed3035be044144c040b10018ee4cef800c04bd9 Mon Sep 17 00:00:00 2001
From: Chris Chua <chris@thousandeyes.com>
Date: Wed, 24 Sep 2014 12:56:50 -0700
Subject: [PATCH] feat($http): add notify callback

Allows progress notifications for $http requests.

This makes use of the readyState 3 of XMLHttpRequest.
---
 src/ng/http.js        | 10 +++++++++-
 src/ng/httpBackend.js |  4 +++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/ng/http.js b/src/ng/http.js
index e10207c57f99..f244f8adc49c 100644
--- a/src/ng/http.js
+++ b/src/ng/http.js
@@ -991,7 +991,7 @@ function $HttpProvider() {
         }
 
         $httpBackend(config.method, url, reqData, done, reqHeaders, config.timeout,
-            config.withCredentials, config.responseType);
+            config.withCredentials, config.responseType, notify);
       }
 
       return promise;
@@ -1026,6 +1026,14 @@ function $HttpProvider() {
       }
 
 
+      /**
+       * Notify callback registered to $httpBackend()
+       */
+      function notify(xhr) {
+        deferred.notify(xhr);
+      }
+
+
       /**
        * Resolves the raw $http promise.
        */
diff --git a/src/ng/httpBackend.js b/src/ng/httpBackend.js
index 78d04cfa24b9..3fdc3d298c4b 100644
--- a/src/ng/httpBackend.js
+++ b/src/ng/httpBackend.js
@@ -40,7 +40,7 @@ function createHttpBackend($browser, createXhr, $browserDefer, callbacks, rawDoc
   var ABORTED = -1;
 
   // TODO(vojta): fix the signature
-  return function(method, url, post, callback, headers, timeout, withCredentials, responseType) {
+  return function(method, url, post, callback, headers, timeout, withCredentials, responseType, notify) {
     var status;
     $browser.$$incOutstandingRequestCount();
     url = url || $browser.url();
@@ -103,6 +103,8 @@ function createHttpBackend($browser, createXhr, $browserDefer, callbacks, rawDoc
               response,
               responseHeaders,
               statusText);
+        } else if (xhr && xhr.readyState == 3 && notify) {
+          notify(xhr);
         }
       };