angular 用拦截器统一处理http请求和响应的方法

angular.module('app.factorys',[])  .factory('httpInterceptor',['$q','$injector','$localStorage',function ($q,$injector,$localStorage) {    var httpInterceptor = {      'responseError' : function(response) {        // ......        return $q.reject(response);      },      'response' : function(response) {        if (response.status == 21000) {          // console.log('do something...');        }        return response || $q.when(response);      },      'request' : function(config) {        config.headers = config.headers || {};        if ($localStorage.token) {          config.headers.token = $localStorage.token;          // config.headers['X-Access-Token'] = $localStorage.token;        };        return config || $q.when(config);        return config;      },      'requestError' : function(config){        // ......        return $q.reject(config);      }    };    return httpInterceptor;  }])

.config(['$httpProvider',function(){  $httpProvider.interceptors.push(httpInterceptor);}])