feat($httpBackend): add timeout support for JSONP requests

Documentation implies that timeout works for all requests, though it
only works with XHR. To implement:
- Change $httpBackend to set a timeout for JSONP requests which will
immediately resolve the request when fired.
- Cancel the timeout when requests are completed.

1 files changed, 14 insertions, 10 deletions

diff --git a/src/ng/httpBackend.js b/src/ng/httpBackend.js
index a3f6cdc0..69ac5976 100644
--- a/src/ng/httpBackend.js
+++ b/src/ng/httpBackend.js
@@ -33,6 +33,7 @@ function $HttpBackendProvider() {
 function createHttpBackend($browser, XHR, $browserDefer, callbacks, rawDocument, locationProtocol) {
   // TODO(vojta): fix the signature
   return function(method, url, post, callback, headers, timeout, withCredentials, responseType) {
+    var status;
     $browser.$$incOutstandingRequestCount();
     url = url || $browser.url();
 
@@ -42,12 +43,12 @@ function createHttpBackend($browser, XHR, $browserDefer, callbacks, rawDocument,
         callbacks[callbackId].data = data;
       };
 
-      jsonpReq(url.replace('JSON_CALLBACK', 'angular.callbacks.' + callbackId),
+      var jsonpDone = jsonpReq(url.replace('JSON_CALLBACK', 'angular.callbacks.' + callbackId),
           function() {
         if (callbacks[callbackId].data) {
           completeRequest(callback, 200, callbacks[callbackId].data);
         } else {
-          completeRequest(callback, -2);
+          completeRequest(callback, status || -2);
         }
         delete callbacks[callbackId];
       });
@@ -58,8 +59,6 @@ function createHttpBackend($browser, XHR, $browserDefer, callbacks, rawDocument,
         if (value) xhr.setRequestHeader(key, value);
       });
 
-      var status;
-
       // In IE6 and 7, this might be called synchronously when xhr.send below is called and the
       // response is in the cache. the promise api will ensure that to the app code the api is
       // always async
@@ -105,13 +104,14 @@ function createHttpBackend($browser, XHR, $browserDefer, callbacks, rawDocument,
       }
 
       xhr.send(post || '');
+    }
 
-      if (timeout > 0) {
-        $browserDefer(function() {
-          status = -1;
-          xhr.abort();
-        }, timeout);
-      }
+    if (timeout > 0) {
+      var timeoutId = $browserDefer(function() {
+        status = -1;
+        jsonpDone && jsonpDone();
+        xhr && xhr.abort();
+      }, timeout);
     }
 
 
@@ -119,6 +119,9 @@ function createHttpBackend($browser, XHR, $browserDefer, callbacks, rawDocument,
       // URL_MATCH is defined in src/service/location.js
       var protocol = (url.match(SERVER_MATCH) || ['', locationProtocol])[1];
 
+      // cancel timeout
+      timeoutId && $browserDefer.cancel(timeoutId);
+
       // fix status code for file protocol (it's always 0)
       status = (protocol == 'file') ? (response ? 200 : 404) : status;
 
@@ -152,5 +155,6 @@ function createHttpBackend($browser, XHR, $browserDefer, callbacks, rawDocument,
     }
 
     rawDocument.body.appendChild(script);
+    return doneWrapper;
   }
 }