How to add call back for $resource methods in AngularJS

With latest AngularJS versions, you could have a look to the $interceptors which are part of the $httpProvider.

Then you can intercept ALL the requests before beeing sent or after the response.

angular.module('app').config(function($httpProvider){

  $httpProvider.interceptors.push(function($q) {
    return {
      'request': function(config) {
        console.log('I will send a request to the server');
        return config; 
      },

      'response': function(response) {
        // called if HTTP CODE = 2xx 
        console.log('I got a sucessfull response from server'); 
        return response;
      }

      'responseError': function(rejection) {
        // called if HTTP CODE != 2xx
        console.log('I got an error from server');
        return $q.reject(rejection);
      }
    };
  });

});

Note that you have to return config or response to get it working.

In the case of rejection, you need to return a deferred rejection, to get the $http.get().error() still working after the interception.

Actions from the Resource class can be passed success and error callbacks just like the lower level $http service

From the docs

• HTTP GET "class" actions: Resource.action([parameters], [success], [error])
• non-GET "class" actions: Resource.action([parameters], postData, [success], [error])

Non-get actions are prefixed with $.

So you can do this

User.get({userId:123}, function(u, getResponseHeaders){
  // this is get's success callback
  u.abc = true;
  u.$save(function(u, putResponseHeaders) {
    // This is $save's success callback, invoke notification from here
  });
});

---

Edit: here's another example from a previous plunker. The get request will fail since it request a non existing json file. The error callback will be run.

someResource.get(function(data){
    console.log('success, got data: ', data);       
}, function(err){
    alert('request failed');
});