The request handler class must define a new handle() method,
and can override any of the following methods. A new instance is
created for each request.
Called after the handle() method to perform any clean-up
actions required. The default implementation does nothing. If
setup() or handle() raise an exception, this
function will not be called.
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
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 string.
However, this can be hidden by using the request handler subclasses
StreamRequestHandler or DatagramRequestHandler, which
override the setup() and finish() methods, and
provide self.rfile and self.wfile attributes.
self.rfile and self.wfile can be read or written,
respectively, to get the request data or return data to the client.
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Called before the handle() method to perform any
initialization actions required. The default implementation does