def ip_from_request(self, request: Request) -> Optional[str]:
if self.config.http.obey_x_forwarded_for and request.requestHeaders.hasHeader(
"X-Forwarded-For"
):
# Type safety: hasHeaders returning True means that getRawHeaders
# returns a nonempty list
return request.requestHeaders.getRawHeaders("X-Forwarded-For")[0] # type: ignore[index]
client = request.getClientAddress()
if isinstance(client, (address.IPv4Address, address.IPv6Address)):
return client.host
else:
return None
