angularjs - Infinite loop in interceptor -

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i've made angularjs website working api. api provides few features authentication (oauth).

when api returns 401 error, means access_token has expired , needs refreshed refresh_token.

i created interceptor in angularjs. goal check if result returned api 401 error , if it's case, must refresh token , then, process previous rejected request.

the problem interceptor creates infinite loop. after second failure of initial request, should stop doesn't.

angular.module('myapp') .factory('authinterceptor', function ($rootscope, $q, $window, $injector) {    return {      // if api returns error     'responseerror' : function(rejection) {        // if it's 401       if (rejection.status == 401) {          var deferred = $q.defer();          $injector.get('$http').post('http://my-api.local/api/oauth/token', {           grant_type    : 'refresh_token',           client_id     : 'id',           client_secret : 'secret',           refresh_token : $window.sessionstorage.refresh_token         }, {           headers : {             'content-type'  : 'application/x-www-form-urlencoded'           },           transformrequest  : function(obj) {             var str = [];             for(var p in obj)             str.push(encodeuricomponent(p) + "=" + encodeuricomponent(obj[p]));             return str.join("&");           }         })         // new token request successfull         .success(function(refreshresponse) {            // processing failed request again (should fail again because didn't saved new tokens)           $injector.get('$http')(rejection.config).success(function(data) {              deferred.resolve(data);            })           .error(function(error, status) {              deferred.reject();            });            return deferred.promise();          })         // new token request failure         .error(function(error, status) {            deferred.reject();           // $location.path('users/login');            return;          });        }       // if it's errorenter code here       else         return rejection;      }    }  });

so code:

  • starts when first request fails
  • refreshes token
  • retries request fails again (<- want make stop here)
  • refreshes token
  • retries request fails again
  • refreshes token
  • retries request fails again
  • etc...

i worked on in app. refresh request needs include config/header variable skipintercept: true. when intercept failed response, can check rejection.config.skipintercept variable. if true, go straight $q.reject(rejection).

where have:

if (rejection.status == 401) {

change to:

if (rejection.status == 401 && !rejection.config.skipintercept) {

and above this:

     headers : {         'content-type'  : 'application/x-www-form-urlencoded'      },

you need add:

     skipintercept: true,       headers: {         'content-type'  : 'application/x-www-form-urlencoded'      },

ps. there's existing solution can use.


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