Angularjs 中的 jQuery ajax beforeSend 相当于什么? [英] What is the equivalent of jQuery ajax beforeSend in Angularjs?

问题描述

我熟悉 Jquery AJAX 调用，它具有不同的回调，如 beforeSend、success、complete 等.

I am familiar with Jquery AJAX call, which has different callbacks like beforeSend, success, complete, etc.

这是使用 Jquery 的 AJAX 调用示例:

This is the example AJAX call with Jquery:

$.ajax({
  url: 'register.php',
  type: 'POST',
  data: {name:name, email:email},
  beforeSend: function() {
       // show loading GIF
  },
  complete: function() {
      // hide loading GIF
  },
  success: function(data) {
      // parse response
  }
});

我想使用 AngularJS 实现同样的效果.

I want to achieve the same using AngularJS.

对于 AngularJS AJAX 请求，是否有像 beforeSend 这样的回调?到目前为止，这是我的代码，但我不确定在哪里可以在我的代码中使用像 beforeSend 这样的回调(以便我可以显示正在加载的 GIF 图像):

Is there a callback like beforeSend for AngularJS AJAX request ? This is my code so far, but i am not sure where can i use a callback like beforeSend (so that i can display a loading GIF image) in my code:

$http.post('register.php', {'name': $scope.name, 'email': $scope.email})
.success(function(data, status, headers, config) {
    if (data != '') { 
    }
});

推荐答案

默认情况下，Angular 不提供 beforeSend 和 complete，但您可以使用拦截器来实现它们.这是我的实现:

By default Angular does not provide beforeSend and complete but you can implement them by using interceptors. Here is my implementation:

(function() {
    var app = angular.module("app");

    app.factory("interceptors", [function() {

        return {

            // if beforeSend is defined call it
            'request': function(request) {

                if (request.beforeSend)
                    request.beforeSend();

                return request;
            },


            // if complete is defined call it
            'response': function(response) {

                if (response.config.complete)
                    response.config.complete(response);

                return response;
            }
        };

    }]);

})();

然后你必须像这样注册你的拦截器:

Then you have to register your interceptor like this:

    (function () {
        var app = angular.module('app', ['ngRoute']);


        app.config(["$routeProvider", "$httpProvider", function ($router, $httpProvider) {    

            // Register interceptors service
            $httpProvider.interceptors.push('interceptors');

            $router.when("/", { templateUrl: "views/index.html" })


            .otherwise({ redirectTo: "/" });        
        }]);
    })();

在这段代码之后，你可以像这样使用它:

After this code you can use it like this:

var promise = $http({
    method: 'POST',
    url: constants.server + '/emails/send',
    data: model,
    beforeSend: function() {
        model.waiting = true;
    },
    complete: function() {
        model.waiting = false;
    }
});

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