当我知道请求在服务器端失败时,我想知道如何模拟promise $http.这是我的代码：
- if ( !ng.isString(email) ) {
- var promise = $q.defer().promise;
- $q.reject();
- return promise;
- }
- return $http( {
- method : "PUT",url : "//localhost/update",data : { data: email }
- })
- // Success handler
- .success(response){ return response})
- // Error handler
- .error(errorMsg){ return errorMsg});
您可以使用resolve和reject来控制数据流：
假设你有这样的服务：
- var app = angular.module("mymodule.services",[]);
- app.factory("HttpRequest",['$q','$http',function(q,http) {
- var deferredData = q.defer();
- http.get('http://your-server.local/data.json').success(function(data) {
- //success,resolve your promise here
- deferredData.resolve(data);
- }).error(function(err) {
- //error,use reject here
- deferredData.reject(err);
- });
- return {
- get: function() {
- return deferredData.promise;
- }
- };
- }]);
然后可以使用该服务：
- var app = angular.module("mymodule.controllers",['mymodule.services']);
- app.controller("MyCtrl",['HttpRequest','$scope',function(res,scope) {
- //the "then"-method of promises takes two functions as arguments,a success and an erro callback
- res.get().then(function(data) {
- //first one is the success callback
- scope.data = data;
- },function(err) {
- scope.err = err;
- });
- }]);
您可以在第二个回调中处理错误.
