code: def build(port=8000, fixtures=None):
      extractor = Extractor()
      parser = Parser(extractor.url_details, fixtures)
      parser.parse()
      url_details = parser.results
      _store = get_store(url_details)
      store = json.dumps(_store)
      variables = str(Variable('let', 'store', store))
      functions = DATA_FINDER + GET_HANDLER + MODIFY_HANDLER + POST_HANDLER
      endpoints = []
      endpoint_uris = []
      for u in parser.results:
          endpoint = Endpoint()
          if u['method'].lower() in ['get', 'post']:
              method = u['method'].lower()
          else:
              method = 'modify'
          response = str(ResponseBody(method))
          u['url'], list_url = clean_url(u['full_url'], _store, u['method'].lower())
          if list_url is not None and u['method'].lower() == 'get':
              list_endpoint = Endpoint()
              list_endpoint.construct('get', list_url, response)
              if str(list_endpoint) not in endpoints:
                  endpoints.append(str(list_endpoint))
              if list_endpoint.uri not in endpoint_uris:
                  endpoint_uris.append(list_endpoint.uri)
          if method == 'modify':
              without_prefix = re.sub(r'\/(\w+)\_\_', '', u['url'])
              for k, v in _store.items():
                  if without_prefix in k:
                      options = v.get('options', '{}')
                      options = ast.literal_eval(options)
                      modifiers = []
                      if options is not None:
                          modifiers = options.get('modifiers', [])
                      if modifiers:
                          for mod in modifiers:
                              if u['method'].lower() == mod:
                                  mod_endpoint = Endpoint()
                                  uri = without_prefix
                                  if v.get('position') is not None and v['position'] == 'url':
                                      uri = re.sub(r'\/?\_\_key', '/:id', u['full_url'])
                                  mod_endpoint.construct(u['method'].lower(), uri, response)
                                  if str(mod_endpoint) not in endpoints:
                                      endpoints.append(str(mod_endpoint))
                                  if mod_endpoint.uri not in endpoint_uris:
                                      endpoint_uris.append(mod_endpoint.uri)
          else:
              endpoint.construct(u['method'], u['url'], response)
              if str(endpoint) not in endpoints:
                  endpoints.append(str(endpoint))
              if endpoint.uri not in endpoint_uris:
                  endpoint_uris.append(endpoint.uri)
      endpoints = ''.join(endpoints)
      express = ExpressServer()
      express.construct(variables, functions, endpoints, port)
      return express