angular 路由拦截

 $scope.$on('$stateChangeStart',function(event, toState, toParams, fromState, fromParams){       if(toState.name=='login') return;        if(!comApi.isNotNullAndUndefined($sessionStorage.ustu)){     event.preventDefault();// 取消默认跳转行为      $state.go("login",{from:toState.name,w:'notLogin'});//跳转到登录界面                }            });//登录控制器 var from = $stateParams.from;        console.log($stateParams);         $state.go(from && from != "login" ? from : "app.home");/** * Created by wanggs  *///拦截http请求的拦截器app.factory('factoryFilters', function ($sessionStorage, $location) {    var sessionInjector = {        request: function (config) {            //请求之前            //判断是否登陆.登陆后将token放到请求头部            if ($sessionStorage.ustu) {                config.headers["hahh"] = $sessionStorage.ustu;            }            return config;        },        response: function (config, header, header1, header2) {            //请求成功之后            //从返回头部获跳转            if (config.headers("hahh")) {                $sessionStorage.ustu = config.headers("hahh");            }            return config;        },        requestError: function (config) {        //请求之前错误            return config;        },        responseError: function (config) {            //请求之后错误            return config;        }    };    return sessionInjector;});app.config(['$httpProvider', function ($httpProvider) {    $httpProvider.interceptors.push('factoryFilters');}]);