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client.py
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# Pyrogram - Telegram MTProto API Client Library for Python
# Copyright (C) 2017-present Dan <https://github.com/delivrance>
#
# 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 functools
import inspect
import logging
import os
import platform
import re
import shutil
import sys
from concurrent.futures.thread import ThreadPoolExecutor
from datetime import datetime, timedelta
from hashlib import sha256
from importlib import import_module
from io import StringIO, BytesIO
from mimetypes import MimeTypes
from pathlib import Path
from typing import Union, List, Optional, Callable, AsyncGenerator
import pyrogram
from pyrogram import __version__, __license__
from pyrogram import enums
from pyrogram import raw
from pyrogram import utils
from pyrogram.crypto import aes
from pyrogram.errors import CDNFileHashMismatch
from pyrogram.errors import (
SessionPasswordNeeded,
VolumeLocNotFound, ChannelPrivate,
BadRequest
)
from pyrogram.handlers.handler import Handler
from pyrogram.methods import Methods
from pyrogram.session import Auth, Session
from pyrogram.storage import FileStorage, MemoryStorage
from pyrogram.types import User, TermsOfService
from pyrogram.utils import ainput
from .dispatcher import Dispatcher
from .file_id import FileId, FileType, ThumbnailSource
from .mime_types import mime_types
from .parser import Parser
from .session.internals import MsgId
log = logging.getLogger(__name__)
class Client(Methods):
"""Pyrogram Client, the main means for interacting with Telegram.
Parameters:
name (``str``):
A name for the client, e.g.: "my_account".
api_id (``int`` | ``str``, *optional*):
The *api_id* part of the Telegram API key, as integer or string.
E.g.: 12345 or "12345".
api_hash (``str``, *optional*):
The *api_hash* part of the Telegram API key, as string.
E.g.: "0123456789abcdef0123456789abcdef".
app_version (``str``, *optional*):
Application version.
Defaults to "Pyrogram x.y.z".
device_model (``str``, *optional*):
Device model.
Defaults to *platform.python_implementation() + " " + platform.python_version()*.
system_version (``str``, *optional*):
Operating System version.
Defaults to *platform.system() + " " + platform.release()*.
lang_code (``str``, *optional*):
Code of the language used on the client, in ISO 639-1 standard.
Defaults to "en".
ipv6 (``bool``, *optional*):
Pass True to connect to Telegram using IPv6.
Defaults to False (IPv4).
proxy (``dict``, *optional*):
The Proxy settings as dict.
E.g.: *dict(scheme="socks5", hostname="11.22.33.44", port=1234, username="user", password="pass")*.
The *username* and *password* can be omitted if the proxy doesn't require authorization.
test_mode (``bool``, *optional*):
Enable or disable login to the test servers.
Only applicable for new sessions and will be ignored in case previously created sessions are loaded.
Defaults to False.
bot_token (``str``, *optional*):
Pass the Bot API token to create a bot session, e.g.: "123456:ABC-DEF1234ghIkl-zyx57W2v1u123ew11"
Only applicable for new sessions.
session_string (``str``, *optional*):
Pass a session string to load the session in-memory.
Implies ``in_memory=True``.
in_memory (``bool``, *optional*):
Pass True to start an in-memory session that will be discarded as soon as the client stops.
In order to reconnect again using an in-memory session without having to login again, you can use
:meth:`~pyrogram.Client.export_session_string` before stopping the client to get a session string you can
pass to the ``session_string`` parameter.
Defaults to False.
phone_number (``str``, *optional*):
Pass the phone number as string (with the Country Code prefix included) to avoid entering it manually.
Only applicable for new sessions.
phone_code (``str``, *optional*):
Pass the phone code as string (for test numbers only) to avoid entering it manually.
Only applicable for new sessions.
password (``str``, *optional*):
Pass the Two-Step Verification password as string (if required) to avoid entering it manually.
Only applicable for new sessions.
workers (``int``, *optional*):
Number of maximum concurrent workers for handling incoming updates.
Defaults to ``min(32, os.cpu_count() + 4)``.
workdir (``str``, *optional*):
Define a custom working directory.
The working directory is the location in the filesystem where Pyrogram will store the session files.
Defaults to the parent directory of the main script.
plugins (``dict``, *optional*):
Smart Plugins settings as dict, e.g.: *dict(root="plugins")*.
parse_mode (:obj:`~pyrogram.enums.ParseMode`, *optional*):
Set the global parse mode of the client. By default, texts are parsed using both Markdown and HTML styles.
You can combine both syntaxes together.
no_updates (``bool``, *optional*):
Pass True to disable incoming updates.
When updates are disabled the client can't receive messages or other updates.
Useful for batch programs that don't need to deal with updates.
Defaults to False (updates enabled and received).
takeout (``bool``, *optional*):
Pass True to let the client use a takeout session instead of a normal one, implies *no_updates=True*.
Useful for exporting Telegram data. Methods invoked inside a takeout session (such as get_chat_history,
download_media, ...) are less prone to throw FloodWait exceptions.
Only available for users, bots will ignore this parameter.
Defaults to False (normal session).
sleep_threshold (``int``, *optional*):
Set a sleep threshold for flood wait exceptions happening globally in this client instance, below which any
request that raises a flood wait will be automatically invoked again after sleeping for the required amount
of time. Flood wait exceptions requiring higher waiting times will be raised.
Defaults to 10 seconds.
hide_password (``bool``, *optional*):
Pass True to hide the password when typing it during the login.
Defaults to False, because ``getpass`` (the library used) is known to be problematic in some
terminal environments.
max_concurrent_transmissions (``bool``, *optional*):
Set the maximum amount of concurrent transmissions (uploads & downloads).
A value that is too high may result in network related issues.
Defaults to 1.
"""
APP_VERSION = f"Pyrogram {__version__}"
DEVICE_MODEL = f"{platform.python_implementation()} {platform.python_version()}"
SYSTEM_VERSION = f"{platform.system()} {platform.release()}"
LANG_CODE = "en"
PARENT_DIR = Path(sys.argv[0]).parent
INVITE_LINK_RE = re.compile(r"^(?:https?://)?(?:www\.)?(?:t(?:elegram)?\.(?:org|me|dog)/(?:joinchat/|\+))([\w-]+)$")
WORKERS = min(32, (os.cpu_count() or 0) + 4) # os.cpu_count() can be None
WORKDIR = PARENT_DIR
# Interval of seconds in which the updates watchdog will kick in
UPDATES_WATCHDOG_INTERVAL = 5 * 60
MAX_CONCURRENT_TRANSMISSIONS = 1
mimetypes = MimeTypes()
mimetypes.readfp(StringIO(mime_types))
def __init__(
self,
name: str,
api_id: Union[int, str] = None,
api_hash: str = None,
app_version: str = APP_VERSION,
device_model: str = DEVICE_MODEL,
system_version: str = SYSTEM_VERSION,
lang_code: str = LANG_CODE,
ipv6: bool = False,
proxy: dict = None,
test_mode: bool = False,
bot_token: str = None,
session_string: str = None,
in_memory: bool = None,
phone_number: str = None,
phone_code: str = None,
password: str = None,
workers: int = WORKERS,
workdir: str = WORKDIR,
plugins: dict = None,
parse_mode: "enums.ParseMode" = enums.ParseMode.DEFAULT,
no_updates: bool = None,
takeout: bool = None,
sleep_threshold: int = Session.SLEEP_THRESHOLD,
hide_password: bool = False,
max_concurrent_transmissions: int = MAX_CONCURRENT_TRANSMISSIONS
):
super().__init__()
self.name = name
self.api_id = int(api_id) if api_id else None
self.api_hash = api_hash
self.app_version = app_version
self.device_model = device_model
self.system_version = system_version
self.lang_code = lang_code.lower()
self.ipv6 = ipv6
self.proxy = proxy
self.test_mode = test_mode
self.bot_token = bot_token
self.session_string = session_string
self.in_memory = in_memory
self.phone_number = phone_number
self.phone_code = phone_code
self.password = password
self.workers = workers
self.workdir = Path(workdir)
self.plugins = plugins
self.parse_mode = parse_mode
self.no_updates = no_updates
self.takeout = takeout
self.sleep_threshold = sleep_threshold
self.hide_password = hide_password
self.max_concurrent_transmissions = max_concurrent_transmissions
self.executor = ThreadPoolExecutor(self.workers, thread_name_prefix="Handler")
if self.session_string:
self.storage = MemoryStorage(self.name, self.session_string)
elif self.in_memory:
self.storage = MemoryStorage(self.name)
else:
self.storage = FileStorage(self.name, self.workdir)
self.dispatcher = Dispatcher(self)
self.rnd_id = MsgId
self.parser = Parser(self)
self.session = None
self.media_sessions = {}
self.media_sessions_lock = asyncio.Lock()
self.save_file_semaphore = asyncio.Semaphore(self.max_concurrent_transmissions)
self.get_file_semaphore = asyncio.Semaphore(self.max_concurrent_transmissions)
self.is_connected = None
self.is_initialized = None
self.takeout_id = None
self.disconnect_handler = None
self.me: Optional[User] = None
self.message_cache = Cache(10000)
# Sometimes, for some reason, the server will stop sending updates and will only respond to pings.
# This watchdog will invoke updates.GetState in order to wake up the server and enable it sending updates again
# after some idle time has been detected.
self.updates_watchdog_task = None
self.updates_watchdog_event = asyncio.Event()
self.last_update_time = datetime.now()
self.loop = asyncio.get_event_loop()
def __enter__(self):
return self.start()
def __exit__(self, *args):
try:
self.stop()
except ConnectionError:
pass
async def __aenter__(self):
return await self.start()
async def __aexit__(self, *args):
try:
await self.stop()
except ConnectionError:
pass
async def updates_watchdog(self):
while True:
try:
await asyncio.wait_for(self.updates_watchdog_event.wait(), self.UPDATES_WATCHDOG_INTERVAL)
except asyncio.TimeoutError:
pass
else:
break
if datetime.now() - self.last_update_time > timedelta(seconds=self.UPDATES_WATCHDOG_INTERVAL):
await self.invoke(raw.functions.updates.GetState())
async def authorize(self) -> User:
if self.bot_token:
return await self.sign_in_bot(self.bot_token)
print(f"Welcome to Pyrogram (version {__version__})")
print(f"Pyrogram is free software and comes with ABSOLUTELY NO WARRANTY. Licensed\n"
f"under the terms of the {__license__}.\n")
while True:
try:
if not self.phone_number:
while True:
value = await ainput("Enter phone number or bot token: ")
if not value:
continue
confirm = (await ainput(f'Is "{value}" correct? (y/N): ')).lower()
if confirm == "y":
break
if ":" in value:
self.bot_token = value
return await self.sign_in_bot(value)
else:
self.phone_number = value
sent_code = await self.send_code(self.phone_number)
except BadRequest as e:
print(e.MESSAGE)
self.phone_number = None
self.bot_token = None
else:
break
sent_code_descriptions = {
enums.SentCodeType.APP: "Telegram app",
enums.SentCodeType.SMS: "SMS",
enums.SentCodeType.CALL: "phone call",
enums.SentCodeType.FLASH_CALL: "phone flash call",
enums.SentCodeType.FRAGMENT_SMS: "Fragment SMS",
enums.SentCodeType.EMAIL_CODE: "email code"
}
print(f"The confirmation code has been sent via {sent_code_descriptions[sent_code.type]}")
while True:
if not self.phone_code:
self.phone_code = await ainput("Enter confirmation code: ")
try:
signed_in = await self.sign_in(self.phone_number, sent_code.phone_code_hash, self.phone_code)
except BadRequest as e:
print(e.MESSAGE)
self.phone_code = None
except SessionPasswordNeeded as e:
print(e.MESSAGE)
while True:
print("Password hint: {}".format(await self.get_password_hint()))
if not self.password:
self.password = await ainput("Enter password (empty to recover): ", hide=self.hide_password)
try:
if not self.password:
confirm = await ainput("Confirm password recovery (y/n): ")
if confirm == "y":
email_pattern = await self.send_recovery_code()
print(f"The recovery code has been sent to {email_pattern}")
while True:
recovery_code = await ainput("Enter recovery code: ")
try:
return await self.recover_password(recovery_code)
except BadRequest as e:
print(e.MESSAGE)
except Exception as e:
log.exception(e)
raise
else:
self.password = None
else:
return await self.check_password(self.password)
except BadRequest as e:
print(e.MESSAGE)
self.password = None
else:
break
if isinstance(signed_in, User):
return signed_in
while True:
first_name = await ainput("Enter first name: ")
last_name = await ainput("Enter last name (empty to skip): ")
try:
signed_up = await self.sign_up(
self.phone_number,
sent_code.phone_code_hash,
first_name,
last_name
)
except BadRequest as e:
print(e.MESSAGE)
else:
break
if isinstance(signed_in, TermsOfService):
print("\n" + signed_in.text + "\n")
await self.accept_terms_of_service(signed_in.id)
return signed_up
def set_parse_mode(self, parse_mode: Optional["enums.ParseMode"]):
"""Set the parse mode to be used globally by the client.
When setting the parse mode with this method, all other methods having a *parse_mode* parameter will follow the
global value by default.
Parameters:
parse_mode (:obj:`~pyrogram.enums.ParseMode`):
By default, texts are parsed using both Markdown and HTML styles.
You can combine both syntaxes together.
Example:
.. code-block:: python
from pyrogram import enums
# Default combined mode: Markdown + HTML
await app.send_message("me", "1. **markdown** and <i>html</i>")
# Force Markdown-only, HTML is disabled
app.set_parse_mode(enums.ParseMode.MARKDOWN)
await app.send_message("me", "2. **markdown** and <i>html</i>")
# Force HTML-only, Markdown is disabled
app.set_parse_mode(enums.ParseMode.HTML)
await app.send_message("me", "3. **markdown** and <i>html</i>")
# Disable the parser completely
app.set_parse_mode(enums.ParseMode.DISABLED)
await app.send_message("me", "4. **markdown** and <i>html</i>")
# Bring back the default combined mode
app.set_parse_mode(enums.ParseMode.DEFAULT)
await app.send_message("me", "5. **markdown** and <i>html</i>")
"""
self.parse_mode = parse_mode
async def fetch_peers(self, peers: List[Union[raw.types.User, raw.types.Chat, raw.types.Channel]]) -> bool:
is_min = False
parsed_peers = []
for peer in peers:
if getattr(peer, "min", False):
is_min = True
continue
username = None
phone_number = None
if isinstance(peer, raw.types.User):
peer_id = peer.id
access_hash = peer.access_hash
username = (
peer.username.lower() if peer.username
else peer.usernames[0].username.lower() if peer.usernames
else None
)
phone_number = peer.phone
peer_type = "bot" if peer.bot else "user"
elif isinstance(peer, (raw.types.Chat, raw.types.ChatForbidden)):
peer_id = -peer.id
access_hash = 0
peer_type = "group"
elif isinstance(peer, raw.types.Channel):
peer_id = utils.get_channel_id(peer.id)
access_hash = peer.access_hash
username = (
peer.username.lower() if peer.username
else peer.usernames[0].username.lower() if peer.usernames
else None
)
peer_type = "channel" if peer.broadcast else "supergroup"
elif isinstance(peer, raw.types.ChannelForbidden):
peer_id = utils.get_channel_id(peer.id)
access_hash = peer.access_hash
peer_type = "channel" if peer.broadcast else "supergroup"
else:
continue
parsed_peers.append((peer_id, access_hash, peer_type, username, phone_number))
await self.storage.update_peers(parsed_peers)
return is_min
async def handle_updates(self, updates):
self.last_update_time = datetime.now()
if isinstance(updates, (raw.types.Updates, raw.types.UpdatesCombined)):
is_min = any((
await self.fetch_peers(updates.users),
await self.fetch_peers(updates.chats),
))
users = {u.id: u for u in updates.users}
chats = {c.id: c for c in updates.chats}
for update in updates.updates:
channel_id = getattr(
getattr(
getattr(
update, "message", None
), "peer_id", None
), "channel_id", None
) or getattr(update, "channel_id", None)
pts = getattr(update, "pts", None)
pts_count = getattr(update, "pts_count", None)
if isinstance(update, raw.types.UpdateChannelTooLong):
log.info(update)
if isinstance(update, raw.types.UpdateNewChannelMessage) and is_min:
message = update.message
if not isinstance(message, raw.types.MessageEmpty):
try:
diff = await self.invoke(
raw.functions.updates.GetChannelDifference(
channel=await self.resolve_peer(utils.get_channel_id(channel_id)),
filter=raw.types.ChannelMessagesFilter(
ranges=[raw.types.MessageRange(
min_id=update.message.id,
max_id=update.message.id
)]
),
pts=pts - pts_count,
limit=pts
)
)
except ChannelPrivate:
pass
else:
if not isinstance(diff, raw.types.updates.ChannelDifferenceEmpty):
users.update({u.id: u for u in diff.users})
chats.update({c.id: c for c in diff.chats})
self.dispatcher.updates_queue.put_nowait((update, users, chats))
elif isinstance(updates, (raw.types.UpdateShortMessage, raw.types.UpdateShortChatMessage)):
diff = await self.invoke(
raw.functions.updates.GetDifference(
pts=updates.pts - updates.pts_count,
date=updates.date,
qts=-1
)
)
if diff.new_messages:
self.dispatcher.updates_queue.put_nowait((
raw.types.UpdateNewMessage(
message=diff.new_messages[0],
pts=updates.pts,
pts_count=updates.pts_count
),
{u.id: u for u in diff.users},
{c.id: c for c in diff.chats}
))
else:
if diff.other_updates: # The other_updates list can be empty
self.dispatcher.updates_queue.put_nowait((diff.other_updates[0], {}, {}))
elif isinstance(updates, raw.types.UpdateShort):
self.dispatcher.updates_queue.put_nowait((updates.update, {}, {}))
elif isinstance(updates, raw.types.UpdatesTooLong):
log.info(updates)
async def load_session(self):
await self.storage.open()
session_empty = any([
await self.storage.test_mode() is None,
await self.storage.auth_key() is None,
await self.storage.user_id() is None,
await self.storage.is_bot() is None
])
if session_empty:
if not self.api_id or not self.api_hash:
raise AttributeError("The API key is required for new authorizations. "
"More info: https://docs.pyrogram.org/start/auth")
await self.storage.api_id(self.api_id)
await self.storage.dc_id(2)
await self.storage.date(0)
await self.storage.test_mode(self.test_mode)
await self.storage.auth_key(
await Auth(
self, await self.storage.dc_id(),
await self.storage.test_mode()
).create()
)
await self.storage.user_id(None)
await self.storage.is_bot(None)
else:
# Needed for migration from storage v2 to v3
if not await self.storage.api_id():
if self.api_id:
await self.storage.api_id(self.api_id)
else:
while True:
try:
value = int(await ainput("Enter the api_id part of the API key: "))
if value <= 0:
print("Invalid value")
continue
confirm = (await ainput(f'Is "{value}" correct? (y/N): ')).lower()
if confirm == "y":
await self.storage.api_id(value)
break
except Exception as e:
print(e)
def load_plugins(self):
if self.plugins:
plugins = self.plugins.copy()
for option in ["include", "exclude"]:
if plugins.get(option, []):
plugins[option] = [
(i.split()[0], i.split()[1:] or None)
for i in self.plugins[option]
]
else:
return
if plugins.get("enabled", True):
root = plugins["root"]
include = plugins.get("include", [])
exclude = plugins.get("exclude", [])
count = 0
if not include:
for path in sorted(Path(root.replace(".", "/")).rglob("*.py")):
module_path = '.'.join(path.parent.parts + (path.stem,))
module = import_module(module_path)
for name in vars(module).keys():
# noinspection PyBroadException
try:
for handler, group in getattr(module, name).handlers:
if isinstance(handler, Handler) and isinstance(group, int):
self.add_handler(handler, group)
log.info('[{}] [LOAD] {}("{}") in group {} from "{}"'.format(
self.name, type(handler).__name__, name, group, module_path))
count += 1
except Exception:
pass
else:
for path, handlers in include:
module_path = root + "." + path
warn_non_existent_functions = True
try:
module = import_module(module_path)
except ImportError:
log.warning('[%s] [LOAD] Ignoring non-existent module "%s"', self.name, module_path)
continue
if "__path__" in dir(module):
log.warning('[%s] [LOAD] Ignoring namespace "%s"', self.name, module_path)
continue
if handlers is None:
handlers = vars(module).keys()
warn_non_existent_functions = False
for name in handlers:
# noinspection PyBroadException
try:
for handler, group in getattr(module, name).handlers:
if isinstance(handler, Handler) and isinstance(group, int):
self.add_handler(handler, group)
log.info('[{}] [LOAD] {}("{}") in group {} from "{}"'.format(
self.name, type(handler).__name__, name, group, module_path))
count += 1
except Exception:
if warn_non_existent_functions:
log.warning('[{}] [LOAD] Ignoring non-existent function "{}" from "{}"'.format(
self.name, name, module_path))
if exclude:
for path, handlers in exclude:
module_path = root + "." + path
warn_non_existent_functions = True
try:
module = import_module(module_path)
except ImportError:
log.warning('[%s] [UNLOAD] Ignoring non-existent module "%s"', self.name, module_path)
continue
if "__path__" in dir(module):
log.warning('[%s] [UNLOAD] Ignoring namespace "%s"', self.name, module_path)
continue
if handlers is None:
handlers = vars(module).keys()
warn_non_existent_functions = False
for name in handlers:
# noinspection PyBroadException
try:
for handler, group in getattr(module, name).handlers:
if isinstance(handler, Handler) and isinstance(group, int):
self.remove_handler(handler, group)
log.info('[{}] [UNLOAD] {}("{}") from group {} in "{}"'.format(
self.name, type(handler).__name__, name, group, module_path))
count -= 1
except Exception:
if warn_non_existent_functions:
log.warning('[{}] [UNLOAD] Ignoring non-existent function "{}" from "{}"'.format(
self.name, name, module_path))
if count > 0:
log.info('[{}] Successfully loaded {} plugin{} from "{}"'.format(
self.name, count, "s" if count > 1 else "", root))
else:
log.warning('[%s] No plugin loaded from "%s"', self.name, root)
async def handle_download(self, packet):
file_id, directory, file_name, in_memory, file_size, progress, progress_args = packet
os.makedirs(directory, exist_ok=True) if not in_memory else None
temp_file_path = os.path.abspath(re.sub("\\\\", "/", os.path.join(directory, file_name))) + ".temp"
file = BytesIO() if in_memory else open(temp_file_path, "wb")
try:
async for chunk in self.get_file(file_id, file_size, 0, 0, progress, progress_args):
file.write(chunk)
except BaseException as e:
if not in_memory:
file.close()
os.remove(temp_file_path)
if isinstance(e, asyncio.CancelledError):
raise e
return None
else:
if in_memory:
file.name = file_name
return file
else:
file.close()
file_path = os.path.splitext(temp_file_path)[0]
shutil.move(temp_file_path, file_path)
return file_path
async def get_file(
self,
file_id: FileId,
file_size: int = 0,
limit: int = 0,
offset: int = 0,
progress: Callable = None,
progress_args: tuple = ()
) -> Optional[AsyncGenerator[bytes, None]]:
async with self.get_file_semaphore:
file_type = file_id.file_type
if file_type == FileType.CHAT_PHOTO:
if file_id.chat_id > 0:
peer = raw.types.InputPeerUser(
user_id=file_id.chat_id,
access_hash=file_id.chat_access_hash
)
else:
if file_id.chat_access_hash == 0:
peer = raw.types.InputPeerChat(
chat_id=-file_id.chat_id
)
else:
peer = raw.types.InputPeerChannel(
channel_id=utils.get_channel_id(file_id.chat_id),
access_hash=file_id.chat_access_hash
)
location = raw.types.InputPeerPhotoFileLocation(
peer=peer,
photo_id=file_id.media_id,
big=file_id.thumbnail_source == ThumbnailSource.CHAT_PHOTO_BIG
)
elif file_type == FileType.PHOTO:
location = raw.types.InputPhotoFileLocation(
id=file_id.media_id,
access_hash=file_id.access_hash,
file_reference=file_id.file_reference,
thumb_size=file_id.thumbnail_size
)
else:
location = raw.types.InputDocumentFileLocation(
id=file_id.media_id,
access_hash=file_id.access_hash,
file_reference=file_id.file_reference,
thumb_size=file_id.thumbnail_size
)
current = 0
total = abs(limit) or (1 << 31) - 1
chunk_size = 1024 * 1024
offset_bytes = abs(offset) * chunk_size
dc_id = file_id.dc_id
session = Session(
self, dc_id,
await Auth(self, dc_id, await self.storage.test_mode()).create()
if dc_id != await self.storage.dc_id()
else await self.storage.auth_key(),
await self.storage.test_mode(),
is_media=True
)
try:
await session.start()
if dc_id != await self.storage.dc_id():
exported_auth = await self.invoke(
raw.functions.auth.ExportAuthorization(
dc_id=dc_id
)
)
await session.invoke(
raw.functions.auth.ImportAuthorization(
id=exported_auth.id,
bytes=exported_auth.bytes
)
)
r = await session.invoke(
raw.functions.upload.GetFile(
location=location,
offset=offset_bytes,
limit=chunk_size
),
sleep_threshold=30
)
if isinstance(r, raw.types.upload.File):
while True:
chunk = r.bytes
yield chunk
current += 1
offset_bytes += chunk_size
if progress:
func = functools.partial(
progress,
min(offset_bytes, file_size)
if file_size != 0
else offset_bytes,
file_size,
*progress_args
)
if inspect.iscoroutinefunction(progress):
await func()
else:
await self.loop.run_in_executor(self.executor, func)
if len(chunk) < chunk_size or current >= total:
break
r = await session.invoke(
raw.functions.upload.GetFile(
location=location,
offset=offset_bytes,
limit=chunk_size
),
sleep_threshold=30
)
elif isinstance(r, raw.types.upload.FileCdnRedirect):
cdn_session = Session(
self, r.dc_id, await Auth(self, r.dc_id, await self.storage.test_mode()).create(),
await self.storage.test_mode(), is_media=True, is_cdn=True
)
try:
await cdn_session.start()
while True:
r2 = await cdn_session.invoke(
raw.functions.upload.GetCdnFile(
file_token=r.file_token,
offset=offset_bytes,
limit=chunk_size
)
)
if isinstance(r2, raw.types.upload.CdnFileReuploadNeeded):
try:
await session.invoke(
raw.functions.upload.ReuploadCdnFile(
file_token=r.file_token,
request_token=r2.request_token
)
)
except VolumeLocNotFound:
break
else:
continue
chunk = r2.bytes
# https://core.telegram.org/cdn#decrypting-files
decrypted_chunk = aes.ctr256_decrypt(
chunk,
r.encryption_key,
bytearray(
r.encryption_iv[:-4]
+ (offset_bytes // 16).to_bytes(4, "big")
)
)
hashes = await session.invoke(
raw.functions.upload.GetCdnFileHashes(
file_token=r.file_token,
offset=offset_bytes
)
)
# https://core.telegram.org/cdn#verifying-files
for i, h in enumerate(hashes):
cdn_chunk = decrypted_chunk[h.limit * i: h.limit * (i + 1)]
CDNFileHashMismatch.check(
h.hash == sha256(cdn_chunk).digest(),
"h.hash == sha256(cdn_chunk).digest()"
)
yield decrypted_chunk
current += 1
offset_bytes += chunk_size
if progress:
func = functools.partial(