code: def wrap_cors(func=None, *, allow_origin='*', allow_headers=DEFAULT_HEADERS):
      
  
      if func is None:
          return functools.partial(wrap_cors,
                                   allow_origin=allow_origin,
                                   allow_headers=allow_headers)
  
      _allow_headers = ", ".join(allow_headers)
  
      @functools.wraps(func)
      def wrapper(request, *args, **kwargs):
          response = func(request, *args, **kwargs)
  
          if not response.headers:
              response.headers = {}
  
          response.headers['Access-Control-Allow-Origin'] = allow_origin
          response.headers['Access-Control-Allow-Headers'] = _allow_headers
          return response
  
      return wrapper
docs: A middleware that allow CORS calls, by adding the
      headers Access-Control-Allow-Origin and Access-Control-Allow-Headers.
      This middlware accepts two optional parameters `allow_origin` and
      `allow_headers` for customization of the headers values. By default
      will be `*` and a set of `[Origin, X-Requested-With, Content-Type, Accept]`
      respectively.