angularjs - Redirect to an external URL -

i'm developing web application using angularjs authentication page doesn't use angularjs, uses html .

so when user disconnected must redirect him authentication page,so made interceptor executed before request , use service application validate if user connected , if he's not must redirected authentication page .

this interceptor code :

                $httpprovider.interceptors                         .push(function($q, $injector) {                             return {                                 'request' : function(request) {                                         var $http = $injector.get('$http'); /* calls service application verify if user connected */                                         $http                                                 .get("sessionvalidator")                                                 .success(                                                         function(data) {                                                             if (data.result == 'sessionnull'                                                                     || data.role != 'role_user') {                                                                 window.location.href = '/authenticationpage';                                                             }                                                           }); return request;                                 },                             };                         });      

my problem there loop generated when call service(because it's request , interceptor executed again).any solutions problem or there way this.

so description , comments set service intercepts both request , response. created generic one, see code below example plunker. can expand code quite bit achieve want.

var app = angular.module("myapp", []);  app.service("interceptorservice", function($http, $q) {    // service has post , get, post documented   return {      get: function(url, parameters){       var deferred = $q.defer(); // promise return        $http.get(url, {params: parameters}).then(function(successresponse){          // check null session or role being not user, , redirect if response approved         if (successresponse.data.result == 'sessionnull' || successresponse.data.role != 'role_user'){           window.location.href = '/authenticationpage';            // should rejected because don't want process response if person not user, person being redirected anyways           deferred.reject(successresponse);         } else{           // since successful, can resolve           deferred.resolve(successresponse);         }        }, function(failureresponse){          console.log(failureresponse);         deferred.reject(failureresponse);         });       return deferred.promise;      },     post: function(url, parameters){       var deferred = $q.defer();        $http.post(url, parameters).then(function(successresponse){         console.log(successresponse);         deferred.resolve(successresponse);       }, function(failureresponse){         console.log(failureresponse);         deferred.reject(failureresponse);       });       return deferred.promise;      }   } })  app.controller('myctrl', ['$scope', 'interceptorservice', function($scope, interceptorservice){    var url = 'http://api.sba.gov/geodata/city_county_links_for_state_of/tx.xml';   interceptorservice.get(url).then(function(response){     $scope.result = "http call succeeded";   }, function(reason){     $scope.result = "http call failed";   });  }]);