How can I use the Angular $http service to retrieve simple data from the MongoDB REST API?

Question

I have a simple MongoDB that stores temporary dummy data that is accessible company-wide.

I can successfully query the data via the following:

$http.jsonp("http://my_server/my_database/my_collection/?callback=JSON_CALLBACK&jsonp=angular.callbacks._0")
            .then(getServersComplete)
            .catch(getServersFailed);

        function getServersComplete(response) {
           var test = response.data;
           //do stuff
        }

        function getServersFailed(error) {
           $log.error('XHR Failed for getServers.\n' + angular.toJson(error.data, true));
        }

My problem is that Mongo's REST interface is expecting the query parameter jsonp=my_callback while Angular's $http service is expecting the query parameter callback=JSON_CALLBACK. Angular then translates JSON_CALLBACK into its own function, in this case angular.callbacks._0 (but if there were more callbacks on the page, it would be angular.callbacks._1, angular.callbacks._2, etc.). How can I tell Mongo which callback Angular has dynamically created?

Community · Accepted Answer · 2017-05-23 12:31:36Z

I implemented the jsonpInterceptor as described here: How to Custom Set AngularJS JSONP Callback Name

.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);
}
  };
})

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