code: def handle_api_static_request(self, request, start_response):
      
      if request.path == PROXY_PATH:
        return util.send_wsgi_response('200 OK',
                                       [('Content-Type',
                                         'text/html')],
                                       PROXY_HTML, start_response)
      else:
        _logger.debug('Unknown static url requested: %s',
                      request.relative_url)
        return util.send_wsgi_response('404 Not Found', [('Content-Type',
                                         'text/plain')], 'Not Found',
                                       start_response)
docs: Handler for requests to {base_path}/static/.*.
  
      This calls start_response and returns the response body.
  
      Args:
        request: An ApiRequest, the request from the user.
        start_response: A function with semantics defined in PEP-333.
  
      Returns:
        A string containing the response body.