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.
