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);
}])