SocketServer.py 文件源码

def process_request(self, request, client_address):
        """Fork a new subprocess to process the request."""
        self.collect_children()
        pid = os.fork()
        if pid:
            # Parent process
            if self.active_children is None:
                self.active_children = set()
            self.active_children.add(pid)
            self.close_request(request) #close handle in parent process
            return
        else:
            # Child process.
            # This must never return, hence os._exit()!
            try:
                self.finish_request(request, client_address)
                self.shutdown_request(request)
                os._exit(0)
            except:
                try:
                    self.handle_error(request, client_address)
                    self.shutdown_request(request)
                finally:
                    os._exit(1)