1import time 

2from logging import getLogger, INFO 

3 

4log = getLogger(__name__) 

5 

6 

7class Proxy: 

8 def __init__(self, server, client): 

9 self.server = server 

10 self.client = client 

11 

12 def serve(self): 

13 self.server.serve(self.dispatcher) 

14 

15 def paramfilter(self, method, param): 

16 return method, param 

17 

18 def dispatcher(self, method: str, params=None): 

19 m, p = self.paramfilter(method, params) 

20 return self.client.call(m, p) 

21 

22 

23class LoggingProxy(Proxy): 

24 def __init__(self, server, client): 

25 super().__init__(server, client) 

26 log.setLevel(INFO) 

27 

28 def dispatcher(self, method: str, params=None): 

29 ts = time.time() 

30 res = super().dispatcher(method, params) 

31 log.info("%s %.3f arg=%s, res=%s", method, 

32 time.time() - ts, params, res) 

33 return res