Angular API - Restful

api.js

app.factory('API', ['$http', function($http){
    
    // API url
    var apiURL = "/api/v1/";
    
    // defuauly HTTP Headers
    var defaultHeaders = {
        "X-API-KEY": angular.getAPIKey()
        "X-SOMETHING": "123"
    };

    // example usage
    // ex: db.fetch( "Book", 1234, function(response){ console.log(response.toString());} );
    return {
        create: function(className, data, callback) {
            $http.post( apiURL+className, data, { headers: defaultHeaders } )
                .success(function(response) {
                    $rootScope.$apply(function() { callback(null, response); });
                })
                .error(function(response) {
                    $rootScope.$apply(function() { callback("Cannot submit data!"); });
                });
        },

        get: function(className, objectId, callback) {
            $http.get( apiURL+className+'/'+objectId, { headers: defaultHeaders }
            ).success(function(response) {
                    $rootScope.$apply(function() { callback(null, response); });
                }).error(function(response) {
                    $rootScope.$apply(function() { callback(response.error || "Cannot get object "+className+"/"+objectId+"!"); });
                });
        },

        fetch: function(className, query, callback) {
            var config = { headers: defaultHeaders };
            if (query) config.params = { where: query };
            $http.get( parseUrl+'/classes/'+className, config
                ).success(function(response) {
                    $rootScope.$apply(function() { callback(null, response); });
                }).error(function(response) {
                    $rootScope.$apply(function() { callback(response.error || "Could not query "+className+"!"); });
                });
        },

        update: function(className, data, callback) {
            $http.put( apiURL+className, data, { headers: defaultHeaders } )
                .success(function(response) {
                    $rootScope.$apply(function() { callback(null, response); });
                })
                .error(function(response) {
                    $rootScope.$apply(function() { callback("Cannot submit data!"); });
                });
        },

        // delete is a reserved word in js
        remove: function(className, objectId, callback) {
            $http['delete']( apiURL+className+'/'+objectId, { headers: defaultHeaders }
                ).success(function(response) {
                    $rootScope.$apply(function() { callback(null, response); });
                }).error(function(response) {
                    $rootScope.$apply(function() { callback(response.error || "Cannot delete object "+className+"/"+objectId+"!"); });
                });
        }
    }
}]);