pyrogram/pyrogram/session/session.py at master · pyrogram/pyrogram · GitHub

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# Pyrogram - Telegram MTProto API Client Library for Python

# This file is part of Pyrogram.

# Pyrogram is free software: you can redistribute it and/or modify

# it under the terms of the GNU Lesser General Public License as published

# by the Free Software Foundation, either version 3 of the License, or

# (at your option) any later version.

# Pyrogram is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

# GNU Lesser General Public License for more details.

# You should have received a copy of the GNU Lesser General Public License

# along with Pyrogram. If not, see <http://www.gnu.org/licenses/>.

import asyncio

import bisect

import logging

import os

from hashlib import sha1

from io import BytesIO

import pyrogram

from pyrogram import raw

from pyrogram.connection import Connection

from pyrogram.crypto import mtproto

from pyrogram.errors import (

RPCError, InternalServerError, AuthKeyDuplicated, FloodWait, ServiceUnavailable, BadMsgNotification,

SecurityCheckMismatch

)

from pyrogram.raw.all import layer

from pyrogram.raw.core import TLObject, MsgContainer, Int, FutureSalts

from .internals import MsgId, MsgFactory

log = logging.getLogger(__name__)

class Result:

def __init__(self):

self.value = None

self.event = asyncio.Event()

class Session:

START_TIMEOUT = 2

WAIT_TIMEOUT = 15

SLEEP_THRESHOLD = 10

MAX_RETRIES = 10

ACKS_THRESHOLD = 10

PING_INTERVAL = 5

STORED_MSG_IDS_MAX_SIZE = 1000 * 2

TRANSPORT_ERRORS = {

404: "auth key not found",

429: "transport flood",

444: "invalid DC"

}

def __init__(

self,

client: "pyrogram.Client",

dc_id: int,

auth_key: bytes,

test_mode: bool,

is_media: bool = False,

is_cdn: bool = False

self.client = client

self.dc_id = dc_id

self.auth_key = auth_key

self.test_mode = test_mode

self.is_media = is_media

self.is_cdn = is_cdn

self.connection = None

self.auth_key_id = sha1(auth_key).digest()[-8:]

self.session_id = os.urandom(8)

self.msg_factory = MsgFactory()

self.salt = 0

self.pending_acks = set()

self.results = {}

self.stored_msg_ids = []

self.ping_task = None

self.ping_task_event = asyncio.Event()

self.recv_task = None

self.is_started = asyncio.Event()

self.loop = asyncio.get_event_loop()

async def start(self):

while True:

self.connection = Connection(

self.dc_id,

self.test_mode,

self.client.ipv6,

self.client.proxy,

self.is_media

)

try:

await self.connection.connect()

self.recv_task = self.loop.create_task(self.recv_worker())

await self.send(raw.functions.Ping(ping_id=0), timeout=self.START_TIMEOUT)

if not self.is_cdn:

await self.send(

raw.functions.InvokeWithLayer(

layer=layer,

query=raw.functions.InitConnection(

api_id=await self.client.storage.api_id(),

app_version=self.client.app_version,

device_model=self.client.device_model,

system_version=self.client.system_version,

system_lang_code=self.client.lang_code,

lang_code=self.client.lang_code,

lang_pack="",

query=raw.functions.help.GetConfig(),

)

timeout=self.START_TIMEOUT

)

self.ping_task = self.loop.create_task(self.ping_worker())

log.info("Session initialized: Layer %s", layer)

log.info("Device: %s - %s", self.client.device_model, self.client.app_version)

log.info("System: %s (%s)", self.client.system_version, self.client.lang_code)

except AuthKeyDuplicated as e:

await self.stop()

raise e

except (OSError, RPCError):

await self.stop()

except Exception as e:

await self.stop()

raise e

else:

break

self.is_started.set()

log.info("Session started")

async def stop(self):

self.is_started.clear()

self.stored_msg_ids.clear()

self.ping_task_event.set()

if self.ping_task is not None:

await self.ping_task

self.ping_task_event.clear()

await self.connection.close()

if self.recv_task:

await self.recv_task

if not self.is_media and callable(self.client.disconnect_handler):

try:

await self.client.disconnect_handler(self.client)

except Exception as e:

log.exception(e)

log.info("Session stopped")

async def restart(self):

await self.stop()

await self.start()

async def handle_packet(self, packet):

data = await self.loop.run_in_executor(

pyrogram.crypto_executor,

mtproto.unpack,

BytesIO(packet),

self.session_id,

self.auth_key,

self.auth_key_id

)

messages = (

data.body.messages

if isinstance(data.body, MsgContainer)

else [data]

)

log.debug("Received: %s", data)

for msg in messages:

if msg.seq_no % 2 != 0:

if msg.msg_id in self.pending_acks:

continue

else:

self.pending_acks.add(msg.msg_id)

try:

if len(self.stored_msg_ids) > Session.STORED_MSG_IDS_MAX_SIZE:

del self.stored_msg_ids[:Session.STORED_MSG_IDS_MAX_SIZE // 2]

if self.stored_msg_ids:

if msg.msg_id < self.stored_msg_ids[0]:

raise SecurityCheckMismatch("The msg_id is lower than all the stored values")

if msg.msg_id in self.stored_msg_ids:

raise SecurityCheckMismatch("The msg_id is equal to any of the stored values")

time_diff = (msg.msg_id - MsgId()) / 2 ** 32

if time_diff > 30:

raise SecurityCheckMismatch("The msg_id belongs to over 30 seconds in the future. "

"Most likely the client time has to be synchronized.")

if time_diff < -300:

raise SecurityCheckMismatch("The msg_id belongs to over 300 seconds in the past. "

"Most likely the client time has to be synchronized.")

except SecurityCheckMismatch as e:

log.info("Discarding packet: %s", e)

await self.connection.close()

return

else:

bisect.insort(self.stored_msg_ids, msg.msg_id)

if isinstance(msg.body, (raw.types.MsgDetailedInfo, raw.types.MsgNewDetailedInfo)):

self.pending_acks.add(msg.body.answer_msg_id)

continue

if isinstance(msg.body, raw.types.NewSessionCreated):

continue

msg_id = None

if isinstance(msg.body, (raw.types.BadMsgNotification, raw.types.BadServerSalt)):

msg_id = msg.body.bad_msg_id

elif isinstance(msg.body, (FutureSalts, raw.types.RpcResult)):

msg_id = msg.body.req_msg_id

elif isinstance(msg.body, raw.types.Pong):

msg_id = msg.body.msg_id

else:

if self.client is not None:

self.loop.create_task(self.client.handle_updates(msg.body))

if msg_id in self.results:

self.results[msg_id].value = getattr(msg.body, "result", msg.body)

self.results[msg_id].event.set()

if len(self.pending_acks) >= self.ACKS_THRESHOLD:

log.debug("Sending %s acks", len(self.pending_acks))

try:

await self.send(raw.types.MsgsAck(msg_ids=list(self.pending_acks)), False)

except OSError:

pass

else:

self.pending_acks.clear()

async def ping_worker(self):

log.info("PingTask started")

while True:

try:

await asyncio.wait_for(self.ping_task_event.wait(), self.PING_INTERVAL)

except asyncio.TimeoutError:

pass

else:

break

try:

await self.send(

raw.functions.PingDelayDisconnect(

ping_id=0, disconnect_delay=self.WAIT_TIMEOUT + 10

), False

)

except (OSError, RPCError):

pass

log.info("PingTask stopped")

async def recv_worker(self):

log.info("NetworkTask started")

while True:

packet = await self.connection.recv()

if packet is None or len(packet) == 4:

if packet:

error_code = -Int.read(BytesIO(packet))

log.warning(

"Server sent transport error: %s (%s)",

error_code, Session.TRANSPORT_ERRORS.get(error_code, "unknown error")

)

if self.is_started.is_set():

self.loop.create_task(self.restart())

break

self.loop.create_task(self.handle_packet(packet))

log.info("NetworkTask stopped")

async def send(self, data: TLObject, wait_response: bool = True, timeout: float = WAIT_TIMEOUT):

message = self.msg_factory(data)

msg_id = message.msg_id

if wait_response:

self.results[msg_id] = Result()

log.debug("Sent: %s", message)

payload = await self.loop.run_in_executor(

pyrogram.crypto_executor,

mtproto.pack,

message,

self.salt,

self.session_id,

self.auth_key,

self.auth_key_id

)

try:

await self.connection.send(payload)

except OSError as e:

self.results.pop(msg_id, None)

raise e

if wait_response:

try:

await asyncio.wait_for(self.results[msg_id].event.wait(), timeout)

except asyncio.TimeoutError:

pass

result = self.results.pop(msg_id).value

if result is None:

raise TimeoutError("Request timed out")

if isinstance(result, raw.types.RpcError):

if isinstance(data, (raw.functions.InvokeWithoutUpdates, raw.functions.InvokeWithTakeout)):

data = data.query

RPCError.raise_it(result, type(data))

if isinstance(result, raw.types.BadMsgNotification):

log.warning("%s: %s", BadMsgNotification.__name__, BadMsgNotification(result.error_code))

if isinstance(result, raw.types.BadServerSalt):

self.salt = result.new_server_salt

return await self.send(data, wait_response, timeout)

return result

async def invoke(

self,

query: TLObject,

retries: int = MAX_RETRIES,

timeout: float = WAIT_TIMEOUT,

sleep_threshold: float = SLEEP_THRESHOLD

try:

await asyncio.wait_for(self.is_started.wait(), self.WAIT_TIMEOUT)

except asyncio.TimeoutError:

pass

if isinstance(query, (raw.functions.InvokeWithoutUpdates, raw.functions.InvokeWithTakeout)):

inner_query = query.query

else:

inner_query = query

query_name = ".".join(inner_query.QUALNAME.split(".")[1:])

while True:

try:

return await self.send(query, timeout=timeout)

except FloodWait as e:

amount = e.value

if amount > sleep_threshold >= 0:

raise

log.warning('[%s] Waiting for %s seconds before continuing (required by "%s")',

self.client.name, amount, query_name)

await asyncio.sleep(amount)

except (OSError, InternalServerError, ServiceUnavailable) as e:

if retries == 0:

raise e from None

(log.warning if retries < 2 else log.info)(

'[%s] Retrying "%s" due to: %s',

Session.MAX_RETRIES - retries + 1,

query_name, str(e) or repr(e)

)

await asyncio.sleep(0.5)

return await self.invoke(query, retries - 1, timeout)

pyrogram/pyrogram/session/session.py at master · pyrogram/pyrogram · GitHub

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