CherryPy CORS issue

coordinator.py

import cherrypy
import ConfigParser
import time
import json
from cherrypy.lib import static
import os
import cherrypy_cors


class Coordinator(object):
    
    def __init__(self, config):
        """ Coordinator object initialization.
        :param config: ConfigParser object containing coordinator configuration
        """
        self.config = config

    @cherrypy.expose
    @cherrypy.tools.json_in()
    def add_meeting(self):
        data = None
        id = None
        start_time = None
        end_time = None
        title = None
        userlist = None
        
        result = {"operation": "request", "result": "success"}
        if cherrypy.request.method == "POST":
            data = cherrypy.request.json
            id = data["id"]
            start_time = data["start_time"]
            end_time = data["end_time"]
            title = data["title"]
            userlist = data["userlist"]
            users = self.get_user_names()
            temp_pref = 0
            preference = None
            temp = None
            userstring= ""
            for user in userlist:
                if user not in users:
                    preference = "70 4000 1 1 " + user
                    self.add_user(user, preference)
                    temp_pref += 70
                else:
                    preference = json.loads(self.get_preference(user))
                    temp = int(preference.split()[0])
                    temp_pref += temp
                userstring += user
                userstring += "__!__"
            avgtemp = temp_pref / len(userlist)
            # the rest involves adding the info above to database
        return result
        
    @cherrypy.expose
    @cherrypy.tools.json_in()
    def remove_meeting(self):
        data = None
        id = None
        result = {"operation": "request", "result": "success"}
        if cherrypy.request.method == "POST":
            data = cherrypy.request.json
            id = data["id"]
            if id is not None:
            # the rest involves deleting a meeting from the database
        return result

def main():
    config = ConfigParser.ConfigParser()
    config.read(CONFIG_FILE) # config file contains host and port
    port = config.getint('Meta', 'port')
    host = config.get('Meta', 'host')
    cherrypy_cors.install()
    cherrypy.config.update({'server.socket_port': port,
                            'server.socket_host': host,
                            'cors.expose.on': True})
    cherrypy.quickstart(Coordinator(config))
main()