def check_timeouts(self):
"""
Runs itself periodically to enforce any expired timeouts.
"""
try:
if not self._task:
return
duration = current_time() - self._time
stage = self._http.stage
if stage is Stage.IDLE and duration > self.keep_alive_timeout:
logger.debug("KeepAlive Timeout. Closing connection.")
elif stage is Stage.REQUEST and duration > self.request_timeout:
logger.debug("Request Timeout. Closing connection.")
self._http.exception = RequestTimeout("Request Timeout")
elif stage is Stage.HANDLER and self._http.upgrade_websocket:
logger.debug("Handling websocket. Timeouts disabled.")
return
elif (stage in (Stage.HANDLER, Stage.RESPONSE, Stage.FAILED)
and duration > self.response_timeout):
logger.debug("Response Timeout. Closing connection.")
self._http.exception = ServiceUnavailable("Response Timeout")
else:
interval = (min(
self.keep_alive_timeout,
self.request_timeout,
self.response_timeout,
) / 2)
self.loop.call_later(max(0.1, interval), self.check_timeouts)
return
self._task.cancel()
except Exception:
error_logger.exception("protocol.check_timeouts")
def connection_timeout(self):
# Check if
time_elapsed = current_time - self._last_request_time
if time_elapsed < self.request_timeout:
time_left = self.request_timeout - time_elapsed
self._timeout_handler = (self.loop.call_later(
time_left, self.connection_timeout))
else:
if self._request_handler_task:
self._request_handler_task.cancel()
exception = RequestTimeout('Request Timeout')
self.write_error(exception)
def connection_timeout(self):
"""
连接超时
"""
time_elapsed = current_time - self._last_request_time # 计算与上次请求间隔
if time_elapsed < self.request_timeout: # 未超时
time_left = self.request_timeout - time_elapsed
self._timeout_handler = \
self.loop.call_later(time_left, self.connection_timeout)
else: # 超时
if self._request_handler_task:
self._request_handler_task.cancel()
exception = RequestTimeout('Request Timeout')
self.write_error(exception)
def request_timeout_callback(self):
# See the docstring in the RequestTimeout exception, to see
# exactly what this timeout is checking for.
# Check if elapsed time since request initiated exceeds our
# configured maximum request timeout value
time_elapsed = time() - self._last_request_time
if time_elapsed < self.request_timeout:
time_left = self.request_timeout - time_elapsed
self._request_timeout_handler = self.loop.call_later(
time_left, self.request_timeout_callback)
else:
if self._request_stream_task:
self._request_stream_task.cancel()
if self._request_handler_task:
self._request_handler_task.cancel()
self.write_error(RequestTimeout("Request Timeout"))