def send_ping(self):
"""Periodically sends a ping and checks if we should close the connection
due to the other side timing out.
"""
now = self.clock.time_msec()
if self.time_we_closed:
if now - self.time_we_closed > PING_TIMEOUT_MS:
logger.info(
"[%s] Failed to close connection gracefully, aborting", self.id()
)
assert self.transport is not None
self.transport.abortConnection()
else:
if now - self.last_sent_command >= PING_TIME:
self.send_command(PingCommand(now))
if (
self.received_ping
and now - self.last_received_command > PING_TIMEOUT_MS
):
logger.info(
"[%s] Connection hasn't received command in %r ms. Closing.",
self.id(),
now - self.last_received_command,
)
self.send_error("ping timeout")
def connectionMade(self):
logger.info("[%s] Connection established", self.id())
self.state = ConnectionStates.ESTABLISHED
connected_connections.append(self) # Register connection for metrics
self.transport.registerProducer(self, True) # For the *Producing callbacks
self._send_pending_commands()
# Starts sending pings
self._send_ping_loop = self.clock.looping_call(self.send_ping, 5000)
# Always send the initial PING so that the other side knows that they
# can time us out.
self.send_command(PingCommand(self.clock.time_msec()))