gopi.Server A HTTP or RPC server which can serve requests;gopi.ConnPool A pool of connections to remote servers;gopi.ServiceDiscovery A mechanism to either discovery available network services or register services;gopi.PingService An RPC service which responds to requests with an empty response;gopi.InputService As RPC service which emits input events (key presses, etc.);gopi.HttpStatic A HTTP service which serves any file or folder on the filesystem.rpcping)[https://github.com/djthorpe/gopi/tree/master/cmd/rpcping] is both a RPC client and server,