1 files changed, 99 insertions, 0 deletions
diff --git a/src/ng/httpBackend.js b/src/ng/httpBackend.js
new file mode 100644
index 00000000..201d1a87
--- /dev/null
+++ b/src/ng/httpBackend.js
@@ -0,0 +1,99 @@
+var XHR = window.XMLHttpRequest || function() {
+  try { return new ActiveXObject("Msxml2.XMLHTTP.6.0"); } catch (e1) {}
+  try { return new ActiveXObject("Msxml2.XMLHTTP.3.0"); } catch (e2) {}
+  try { return new ActiveXObject("Msxml2.XMLHTTP"); } catch (e3) {}
+  throw new Error("This browser does not support XMLHttpRequest.");
+};
+
+
+/**
+ * @ngdoc object
+ * @name angular.module.ng.$httpBackend
+ * @requires $browser
+ * @requires $window
+ * @requires $document
+ *
+ * @description
+ * HTTP backend used by the {@link angular.module.ng.$http service} that delegates to
+ * XMLHttpRequest object or JSONP and deals with browser incompatibilities.
+ *
+ * You should never need to use this service directly, instead use the higher-level abstractions:
+ * {@link angular.module.ng.$http $http} or {@link angular.module.ng.$resource $resource}.
+ *
+ * During testing this implementation is swapped with {@link angular.module.ngMock.$httpBackend mock
+ * $httpBackend} which can be trained with responses.
+ */
+function $HttpBackendProvider() {
+  this.$get = ['$browser', '$window', '$document', function($browser, $window, $document) {
+    return createHttpBackend($browser, XHR, $browser.defer, $window.angular.callbacks,
+        $document[0].body, $window.location.protocol.replace(':', ''));
+  }];
+}
+
+function createHttpBackend($browser, XHR, $browserDefer, callbacks, body, locationProtocol) {
+  // TODO(vojta): fix the signature
+  return function(method, url, post, callback, headers, timeout) {
+    $browser.$$incOutstandingRequestCount();
+    url = url || $browser.url();
+
+    if (lowercase(method) == 'jsonp') {
+      var callbackId = '_' + (callbacks.counter++).toString(36);
+      callbacks[callbackId] = function(data) {
+        callbacks[callbackId].data = data;
+      };
+
+      var script = $browser.addJs(url.replace('JSON_CALLBACK', 'angular.callbacks.' + callbackId),
+          function() {
+        if (callbacks[callbackId].data) {
+          completeRequest(callback, 200, callbacks[callbackId].data);
+        } else {
+          completeRequest(callback, -2);
+        }
+        delete callbacks[callbackId];
+        body.removeChild(script);
+      });
+    } else {
+      var xhr = new XHR();
+      xhr.open(method, url, true);
+      forEach(headers, function(value, key) {
+        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
+      xhr.onreadystatechange = function() {
+        if (xhr.readyState == 4) {
+          completeRequest(
+              callback, status || xhr.status, xhr.responseText, xhr.getAllResponseHeaders());
+        }
+      };
+
+      xhr.send(post || '');
+
+      if (timeout > 0) {
+        $browserDefer(function() {
+          status = -1;
+          xhr.abort();
+        }, timeout);
+      }
+    }
+
+
+    function completeRequest(callback, status, response, headersString) {
+      // URL_MATCH is defined in src/service/location.js
+      var protocol = (url.match(URL_MATCH) || ['', locationProtocol])[1];
+
+      // fix status code for file protocol (it's always 0)
+      status = (protocol == 'file') ? (response ? 200 : 404) : status;
+
+      // normalize IE bug (http://bugs.jquery.com/ticket/1450)
+      status = status == 1223 ? 204 : status;
+
+      callback(status, response, headersString);
+      $browser.$$completeOutstandingRequest(noop);
+    }
+  };
+}