From the BaseRequestHandler documentation:
handle()
This function must do all the work required to service a request.
The default implementation does nothing. Several instance attributes
are available to it; the request is available as self.request; the
client address as self.client_address; and the server instance as
self.server, in case it needs access to per-server information.
The type of self.request is different for datagram or stream
services. For stream services, self.request is a socket object;
for datagram services, self.request is a pair of string and
socket.
