Managing global errors and intercepting requests in AngularJS can be easily achieved by utilizing $resource interceptors and global handlers for

My question pertains to the interceptor(responseError) of $resource. It is essential to note that I am working with angularjs version V1.3.6.

The Issue:

app.factory('authInterceptor',['$q', '$location', '$log', function($q, $location, $log){
    $log.debug('this is a standard factory with dependencies injection');
    return {
        responseError: function(response){
            console.log(response)
            // The issue lies in the inability to check for 401 using response.status,
            // since the response received here is an ERROR OBJECT such as `SyntaxError: ...`. Is there any way to retrieve the status?
            return $q.reject(response);
        }
    }
}])

When a 401 response is received, the arguments of responseError hold an ERROR OBJECT like SyntaxError: Unexpected token U because the server response is plain text Unauthorized with a status code of 401.

However, my intention is to access the response.status and perform a specific action if it is 401.

Any assistance on this matter would be greatly appreciated.

Answer №1

After some investigation, I have come to the conclusion that this question warrants closure since I have managed to find the solution on my own.

It has been highlighted that even when the response returns a status code of 401/404 instead of 200, the transformResponse function is still executed leading to an unexpected error. This error overshadows the actual response with a status property, making it impossible to access the original response within the interceptor.

In my opinion, it seems unreasonable for transformResponse to run when the response's status is not 200. Furthermore, within transformResponse, there is no way to retrieve the status code...

Answer №2

Below is a straightforward snippet for an interceptor designed to manage 401 errors and handle additional configurations:

angular.module('notesApp', [])
  .factory('AuthInterceptor',['AuthInfoService', '$q', function(AuthInfoService, $q) {
      return {

        responseError: function(responseError) {
              if (responseError.status === 401) { // handling authentication issue
                    //redirect user to login page or perform alternative actions...
              }
              return $q.reject(responseError);
        }
     };
 }])
 .config(['$httpProvider', function($httpProvider) {
     $httpProvider.interceptors.push('AuthInterceptor');
}]);

** This interceptor specifically targets incoming responses that do not have a status code of 200. ** If the status code is 401, the user is directed to the login page. In this scenario, the promise is rejected so that any associated controller or service recognizes the failure.

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