我的工厂中有以下方法getData(url)
,它使用$http.get(url)
从网址获取数据
angular
.module('az-app')
.factory('WebServiceFactory', function ($http, $q) {
var WebServiceFactory = this;
WebServiceFactory.getData = function (url) {
var deferred = $q.defer();
$http.get(url)
.then(
function (response) {
deferred.resolve({
data: response
});
}, function (rejected) {
deferred.reject({
data: rejected
});
}
);
//Promise to be returned
return deferred.promise;
}
它工作正常,但我需要中止http.get和/或拒绝承诺,以便我可以显示来自我的控制器的错误消息,其中包含以下方法:
var getSpecialties = function (type) {
doctorsCtrl.showLoading();
var url = "example.com";
WebServiceFactory.getData(url)
.then(
function (result) {
doctorsCtrl.hideLoading();
var specialtiesArray = result.data.data;
StorageFactory.specialties = specialtiesArray;
doctorsCtrl.specialties = StorageFactory.specialties
//I WANT TO TRIGGER THIS REJECTED FUNCTION when timeout time is finished
}, function (rejected) {
doctorsCtrl.hideLoading();
doctorsCtrl.showAlert();
}
);
}
答案 0 :(得分:9)
服务$http
在配置对象中接受timeout
属性,该属性可以满足您的需求。查看documentation,尤其是关于config
对象的部分:
timeout - {number | Promise} - 超时(以毫秒为单位),或承诺在解决时应中止请求。
另外,请注意您以低效的方式使用承诺。以下是 promise antipattern :
WebServiceFactory.getData = function (url) { var deferred = $q.defer(); $http.get(url) .then( function (response) { deferred.resolve(...); }, function (rejected) { deferred.reject(...); } ); //Promise to be returned return deferred.promise; }
你可以简单地说:
WebServiceFactory.getData = function (url) {
return $http.get(url);
}
超时为3秒时,它将是:
<强>服务强>
WebServiceFactory.getData = function (url) {
return $http.get(url, {timeout: 3000}); // <-- timeout applies ONLY for this call
}
<强>控制器:强>
WebServiceFactory.getData(url).then(
function (result) {
doctorsCtrl.hideLoading();
doctorsCtrl.specialties = StorageFactory.specialties = result.data;
}, function (rejected) {
doctorsCtrl.hideLoading();
doctorsCtrl.showAlert();
}
);
另请注意,在成功和错误的情况下,您都会调用hideLoading
。您可以在链式 finally 处理程序中调用它一次:
// ...
.finally(function () {
doctorsCtrl.hideLoading();
}