test.py

#!/usr/bin/python3

import json
import os
import socket
import sys

socketFd=int(os.environ["APT_HOOK_SOCKET"])


fobj=os.fdopen(socketFd, "r")
out=os.fdopen(socketFd, "w")
lines=iter(fobj)

while True:
	line = next(lines)
	request = json.loads(line)
	
	print("Received call", request["method"], request.get("id"))

	terminator = next(lines)
	if terminator != '\n':
		print("E: Invalid end of request: %r" % terminator)

	if request["method"] == "org.debian.apt.hooks.hello":
		print("Answering hello")
		out.write("""{"jsonrpc": "2.0", "result": {"version": "0.1"}, "id": 0}\n\n""")
		out.flush()
	if request["method"] == "org.debian.apt.hooks.bye":
		print("Bye bye")
		sys.exit(0)