how to custom set angularjs jsonp callback name?

Question

I have to fetch json data from some website through angularjs. i have done everything correctly according to the link below.

My problem is the api does not allow callback parameter to have any character except letters, numbers and _. And since angular replaces the JSON_CALLBACK with something like 'angular.callbacks._0', its not being allowed.

How can i custom set this value for angularjs?

parsing JSONP $http.jsonp() response in angular.js

thanks

Answer 1

The callback names are hard-coded here httpBackend.js#L55, so you can't config it.

But, you could write a HTTP interceptor to workaround it like this:

.factory('jsonpInterceptor', function($timeout, $window, $q) {
  return {
    'request': function(config) {
      if (config.method === 'JSONP') {
        var callbackId = angular.callbacks.counter.toString(36);
        config.callbackName = 'angular_callbacks_' + callbackId;
        config.url = config.url.replace('JSON_CALLBACK', config.callbackName);

        $timeout(function() {
          $window[config.callbackName] = angular.callbacks['_' + callbackId];
        }, 0, false);
      }

      return config;
    },

    'response': function(response) {
      var config = response.config;
      if (config.method === 'JSONP') {
        delete $window[config.callbackName]; // cleanup
      }

      return response;
    },

    'responseError': function(rejection) {
      var config = rejection.config;
      if (config.method === 'JSONP') {
        delete $window[config.callbackName]; // cleanup
      }

      return $q.reject(rejection);
    }
  };
})

Example Plunker: http://plnkr.co/edit/S5K46izpIxHat3gLqvu7?p=preview

Hope this helps.