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Don't start another thread unless an update handler is added*

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*Also, stop sending pings, automatic reconnection from
commit fb4885a does the job better.
This commit is contained in:
Lonami Exo 2017-06-07 20:08:16 +02:00
parent 1860054ec0
commit 4a2b6e7fa8
1 changed files with 28 additions and 49 deletions
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77
telethon/telegram_client.py
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@ -97,14 +97,14 @@ class TelegramClient:
self.transport = None
self.proxy = proxy # Will be used when a TcpTransport is created
self.login_success = False
# Safety across multiple threads (for the updates thread)
self._lock = RLock()
self._logger = logging.getLogger(__name__)
# Methods to be called when an update is received
self.update_handlers = []
self.ping_interval = 60
self._ping_time_last = time()
self._update_handlers = []
self._updates_thread_running = Event()
self._updates_thread_receiving = Event()
@ -180,10 +180,7 @@ class TelegramClient:
# although many other options are available!
self.dc_options = result.dc_options
# Once we know we're authorized, we can setup the ping thread
if self.is_user_authorized():
self._setup_ping_thread()
self.login_success = True
return True
except (RPCError, ConnectionError) as error:
# Probably errors from the previous session, ignore them
@ -329,7 +326,7 @@ class TelegramClient:
self.sender.send(request)
self.sender.receive(request, timeout, updates=updates)
for update in updates:
for handler in self.update_handlers:
for handler in self._update_handlers:
handler(update)
return request.result
@ -435,13 +432,7 @@ class TelegramClient:
'and a password only if an RPCError was raised before.')
# Ignore 'result.user', we don't need it
#
# If we want the connection to stay alive for a long time, we need
# to start the pings thread once we're already authorized and not
# before to avoid the updates thread trying to read anything while
# we haven't yet connected.
self._setup_ping_thread()
self.login_success = True
return True
def sign_up(self, phone_number, code, first_name, last_name=''):
@ -937,39 +928,37 @@ class TelegramClient:
def add_update_handler(self, handler):
"""Adds an update handler (a function which takes a TLObject,
an update, as its parameter) and listens for updates"""
if not self.sender:
raise RuntimeError(
"You should connect at least once to add update handlers.")
if not self.sender or not self.login_success:
raise RuntimeError("You can't add update handlers until you've "
"successfully logged in.")
# TODO Eventually remove these methods, the user
# can access self.update_handlers manually
self.update_handlers.append(handler)
first_handler = not self._update_handlers
self._update_handlers.append(handler)
if first_handler:
self._set_updates_thread(running=True)
def remove_update_handler(self, handler):
self.update_handlers.remove(handler)
self._update_handlers.remove(handler)
if not self._update_handlers:
self._set_updates_thread(running=False)
def list_update_handlers(self):
return self.update_handlers[:]
def _setup_ping_thread(self):
"""Sets up the Ping's thread, so that a connection can be kept
alive for a longer time without Telegram disconnecting us"""
self._updates_thread = Thread(
name='UpdatesThread', daemon=True,
target=self._updates_thread_method)
self._set_updates_thread(running=True)
return self._update_handlers[:]
def _set_updates_thread(self, running):
"""Sets the updates thread status (running or not)"""
if not self._updates_thread or \
running == self._updates_thread_running.is_set():
if running == self._updates_thread_running.is_set():
return
# Different state, update the saved value and behave as required
self._logger.info('Changing updates thread running status to %s', running)
if running:
self._updates_thread_running.set()
if not self._updates_thread:
self._updates_thread = Thread(
name='UpdatesThread', daemon=True,
target=self._updates_thread_method)
self._updates_thread.start()
else:
self._updates_thread_running.clear()
@ -986,29 +975,16 @@ class TelegramClient:
# Always sleep a bit before each iteration to relax the CPU,
# since it's possible to early 'continue' the loop to reach
# the next iteration, but we still should to sleep.
# Longer sleep if we're not expecting updates (only pings)
sleep(0.1 if self.update_handlers else 1)
sleep(0.1)
with self._lock:
self._logger.debug('Updates thread acquired the lock')
try:
now = time()
# If ping_interval seconds passed since last ping, send a new one
if now >= self._ping_time_last + self.ping_interval:
self._ping_time_last = now
self.invoke(PingRequest(utils.generate_random_long()))
self._logger.debug('Ping sent from the updates thread')
# Exit the loop if we're not expecting to receive any updates
if not self.update_handlers:
self._logger.debug('No updates handlers found, continuing')
continue
self._updates_thread_receiving.set()
self._logger.debug('Trying to receive updates from the updates thread')
result = self.sender.receive_update(timeout=timeout)
self._logger.info('Received update from the updates thread')
for handler in self.update_handlers:
for handler in self._update_handlers:
handler(result)
except ConnectionResetError:
@ -1035,4 +1011,7 @@ class TelegramClient:
self._logger.debug('Updates thread released the lock')
self._updates_thread_receiving.clear()
# Thread is over, so clean unset its variable
self._updates_thread = None
# endregion