feat($http): add support for aborting via timeout promises

If the timeout argument is a promise, abort the request when it is resolved.
Implemented by adding support to $httpBackend service and $httpBackend mock
service.

This api can also be used to explicitly abort requests while keeping the
communication between the deffered and promise unidirectional.

Closes #1159

1 files changed, 3 insertions, 2 deletions

diff --git a/src/ng/http.js b/src/ng/http.js
index 708a0650..fbdc89a5 100644
--- a/src/ng/http.js
+++ b/src/ng/http.js
@@ -548,7 +548,8 @@ function $HttpProvider() {
      *      GET request, otherwise if a cache instance built with
      *      {@link ng.$cacheFactory $cacheFactory}, this cache will be used for
      *      caching.
-     *    - **timeout** – `{number}` – timeout in milliseconds.
+     *    - **timeout** – `{number|Promise}` – timeout in milliseconds, or {@link ng.$q promise}
+     *      that should abort the request when resolved.
      *    - **withCredentials** - `{boolean}` - whether to to set the `withCredentials` flag on the
      *      XHR object. See {@link https://developer.mozilla.org/en/http_access_control#section_5
      *      requests with credentials} for more information.
@@ -927,7 +928,7 @@ function $HttpProvider() {
         }
 
         resolvePromise(response, status, headersString);
-        $rootScope.$apply();
+        if (!$rootScope.$$phase) $rootScope.$apply();
       }