Page 144 - AngularJS权威教程

124 第 14 章 服务

例如，下面的代码展示了如何给githubService添加装饰器，从而为每个请求都加上一个时
间戳：

var githubDecorator = function($delegate,$log) {
var events = function(path) {
var startedAt = new Date();
var events = $delegate.events(path);
// 事件是一个promise events.finally(function() {
$log.info("Fetching events" +
" took " +
(new Date() - startedAt) + "ms");
});
return events;
};

return {
events: events
};
};

angular.module('myApp')
.config(function($provide) {
$provide.decorator('githubService',githubDecorator);
});