fix(httpBackend): should not read response data when request is aborted

When a request is aborted, it makes no sense to read the response headers or text.
Also in IE9, trying to read data (either response headers or text) from an aborted request
throws an Error c00c023f.

Fixes #4913
Closes #4940

1 files changed, 19 insertions, 0 deletions

diff --git a/test/ng/httpBackendSpec.js b/test/ng/httpBackendSpec.js
index b262d8a2..cc73ea8e 100644
--- a/test/ng/httpBackendSpec.js
+++ b/test/ng/httpBackendSpec.js
@@ -118,6 +118,25 @@ describe('$httpBackend', function() {
     });
   });
 
+  it('should not try to read response data when request is aborted', function() {
+    callback.andCallFake(function(status, response, headers) {
+      expect(status).toBe(-1);
+      expect(response).toBe(null);
+      expect(headers).toBe(null);
+    });
+    $backend('GET', '/url', null, callback, {}, 2000);
+    xhr = MockXhr.$$lastInstance;
+    spyOn(xhr, 'abort');
+
+    fakeTimeout.flush();
+    expect(xhr.abort).toHaveBeenCalledOnce();
+
+    xhr.status = 0;
+    xhr.readyState = 4;
+    xhr.onreadystatechange();
+    expect(callback).toHaveBeenCalledOnce();
+  });
+
   it('should abort request on timeout', function() {
     callback.andCallFake(function(status, response) {
       expect(status).toBe(-1);